Planning report · Dun Laoghaire-Rathdown County Council · 500 m around the house · the last 12 months · 1 Nov 2026, 20:00

Chestnut Road

53.29864, -6.20942

Homes here mostly date from 1919–1945. Home extensions nearby almost always get approved (94%). 68 homes approved 392 m away haven't started.

See on the map Watch this area

Distance

250 m 500 m 1 km 2 km

Time

12 months 2 years 5 years

94%of home extensions approved nearbyn=632 · 1.5 km · 10 yrs 52 daystypical wait for a decisionmiddle half 50–54 3open for comments nearbyclose 4 Nov–26 Nov 68homes approved nearby, not startednearest 392 m · D24A/0783/WEB

How planning works, with this area's numbers

steps can overlap · medians for home extensions within 1.5 km, 10 years

1ApplySite notice up, plans online
2Comments5 weeks, €20. Comment to keep your right to appeal
3Decision8 weeks by law. Here 52 days
4Appeal window4 weeks after the decision
5AppealHere about 4 months
6PermissionLasts 5 years
7StartStart notice to the council. Here about 5 months after
8Sign-offCompletion cert, or the owner opts out

Question 1

What's the planning story of this house?

Figure 1

When it was built, and the rules since

Most homes here were built 1919–45, before planning permission was needed.

Each line is a rule that applies to work done after it.

MeasuredEstimatecouncil register via NPAD · build years: CSO Census 2022, small area

On this site

Zoning · Existing residential

Protected or listed · on the council's list

Vacant land tax · lived-in homes don't pay it

1 in 20

Radon (EPA) · homes with high radon

Zoning, protection, tax and flood: the detail

ZoningR2 · Existing residential

What it says

Objective A: A To provide residential development and improve residential amenity while protecting the existing residential amenities

An established residential area. The objective is to protect existing residential amenity as well as to provide housing — which is the objective a neighbour's objection to an overbearing extension is usually argued under.

county development plan 2022 2028 · 1 Apr 2022 – 1 Apr 2028

ZoningR2 · Existing residential

What it says

Objective A: A To provide residential development and improve residential amenity while protecting the existing residential amenities

d n laoghaire rathdown county development plan 2022 2028 variation no 1 · 21 Apr 2022 – 20 Apr 2028

Radon1 in 20 homes have high radon (EPA)

Not on this site: protected building, heritage inventory, monument zone, conservation area, EU nature site, EU bird site, natural heritage area, tree order, landslide risk, derelict list.

Vacant land taxNo lived-in homes don't pay it

Flood riskNone mapped within 500 m

Within 500 m	Count	For example
Radon grid squares	3
Protected buildings	6	Saint Thomas' Church; Stansted
Monuments	1	R178430

How we work this out

'On this site' means the record's own map outline touches the registered parcel (or a 12 m circle round the point where there is no parcel). Only the council's own list confirms a protected building; ask the council if in doubt. The council's map for the vacant land tax shows this spot inside an area of existing homes. Homes people live in, and their gardens, don't pay the tax. The OPW flood map's licence lets us show a yes/no only. Land on the vacant land tax map nearby: 1 on the draft 2027 map.

Sources: Development plan zoning (councils), EPA radon map, Residential Zoned Land Tax maps, Constraint layers (bundle), Records of Protected Structures, Sites and Monuments Record · fetched 25 Oct 2026, 23:43

Source	Licence	Fetched	Link
Development plan zoning (councils)	CC BY 4.0	25 Oct 2026, 23:06	open
EPA radon map	CC BY 4.0	27 Sept 2026, 19:36	open
Residential Zoned Land Tax maps	CC BY 4.0	25 Oct 2026, 23:43	open
Constraint layers (bundle)	CC BY 4.0, CC BY-NC-ND 4.0	27 Sept 2026, 19:37	open
Records of Protected Structures	CC BY 4.0	27 Sept 2026, 19:36	open
Sites and Monuments Record	CC BY 4.0	27 Sept 2026, 19:29	open

How we work this out

Applications whose site outline (or map point) falls on this property. 'No sign building has started' means we found no notice to the council's building control office; small jobs don't always file one, so ask. A missing completion certificate is not proof of a problem: an owner can opt out of official sign-off for a house or extension built for themselves.

Sources: Building Control Management System (commencement notices), National Planning Application Database · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open

Question 2

Could you extend?

Nothing on this site restricts it: not protected, not in a conservation area.

Figure 2

What happened to applications like yours

Extensions here: 81–100% by type. A new house in a garden is harder: 64% approved, and 1 in 6 is asked for more information.

Single-storey rear107 decided · more info asked 14%

98% · council 96%

Two-storey rear66 decided · more info asked 12%

95% · council 92%

Two-storey side19 decided · more info asked 11%

95% · council 95%

Single-storey side23 decided · more info asked 9%

91% · council 96%

Attic or dormer247 decided · more info asked 9%

94% · council 94%

First-floor21 decided · more info asked 10%

81% · council 90%

Garage conversion35 decided · more info asked 0%

100% · council 99%

Porch or front19 decided · more info asked 5%

100% · council 98%

New house in a garden or site39 decided · more info asked 18%

64% · council 63%

Approved nearbyDún Laoghaire-Rathdown overall

Decided applications within 1.5 km, received in the last 10 years. The kind of work is read from each description.

CalculatedOur classificationcouncil register via NPAD · 576 nearby, 3,892 council-wide

Extensions and refusals right beside you 2 within 250 m · 0 refused within 100 m

Extensions and refusals near you 2 extensions within 250 m · the last 12 months

2 approved

Kind	Applied	Approved	Refused
Other	1	1	—
Two-storey side	1	1	—

Refused within 100 m 0 in the last 12 months

Nothing refused this close in the last 12 months.

How we work this out

Home extensions are read from the application's description (extension, attic or dormer, porch, garage conversion, garden room), so a few may be missed or mislabelled. The kind is the first that fits: a dormer with a rear extension counts as a dormer. Refusal reasons come from An Coimisiún Pleanála's inspector reports, so they exist only where the refusal was appealed (Dún Laoghaire-Rathdown so far). The council's own reasons are on its planning file.

Sources: National Planning Application Database, An Coimisiún Pleanála cases (ArcGIS feed) · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open

Sources: An Coimisiún Pleanála cases (ArcGIS feed), Building Control Management System (commencement notices), National Planning Application Database · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open

Question 3

How long, and what if someone objects?

Figure 3

A home extension's journey here

A decision takes 52 days. 1 in 9 is asked for more information, which adds about 51 days. Building starts about 5 months after permission.

Bars are medians; whiskers show the middle half. Medians of separate steps don't add up exactly.

Calculated632 decided home extensions, 326 start notices, 100 decided appeals · within 1.5 km, 10 years · NPAD, BCMS, An Coimisiún Pleanála

Figure 4

What appeals changed

14 of 33 appealed refusals became permissions. 3 of 68 appealed approvals were reversed.

Refusals appealed33 decided

14 became permissions

Approvals appealed68 decided

3 reversed

Ended approvedEnded refusedWithdrawn, invalid or other

Every appeal decided within 1.5 km in 10 years, any kind of development.

CalculatedAn Coimisiún Pleanála cases linked to the council file

Appeals nearby 7 in the last 12 months

1 of 4 changed the council's decision

502174 Pending · 32, Deerpark Road, Mount Merrion, Dublin, A94X7K4 · 441 m
502148 Pending · 57, Deerpark Road, Mount Merrion, Dublin, A94F761 · 368 m
502081 Pending · 26, Wilson Road, Mount Merrion, Blackrock, Co Dublin, A94R8X3 · 364 m
500642 Granted with conditions · 14, Saint Thomas Road, Mount Merrion, Blackrock, Co. Dublin, A94 AE89 · 217 m report
501139 Granted · 3, The Foster's, Mount Merrion, Dublin, A94TK64 · 357 m report
500656 Refused · 26, Wilson Road, Mount Merrion, Co. Dublin, A94R8X3 · 364 m report
500281 Refused · 6, Wilson Crescent, Mount Merrion, Blackrock, Dublin, A94E4X0 · 472 m report

Sources: An Coimisiún Pleanála cases (ArcGIS feed), Courts Service legal diary (judicial reviews), National Planning Application Database · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open
Courts Service legal diary (judicial reviews)	© the publisher	31 Oct 2026, 23:12	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open

Question 4

What's changing around you?

Street map around Chestnut Road with 15 numbered planning items — ⌖ the houseOpen for commentsWindow closingDerelict buildingApproved, not startedRefusedBuilding startedApprovedNo decision yet

143 Hampton Park, Saint Helen's Wood D26B/0554/WEBNo decision yet · 449 m
229 Sycamore Road, Mount Merrion D26A/0767/WEBNo decision yet · 460 m
311 Trees Avenue, Mount Merrion D26B/0522/WEBNo decision yet · 476 m
434 Wilson Road, Mount Merrion D26B/0476/WEBApproved · 325 m
5Applegreen, Stillorgan Road D26A/0618/WEBApproved · 351 m
6DERELICT, 65 DEERPARK ROAD DS 1646Derelict building · 360 m
7Fosters Avenue D24A/0783/WEBApproved, no sign building has started · 392 m
838A Greenfield Road (to west side of 38 Balnagowan, Greenfield Road) D25A/0842/WEBRefused · 132 m
912 The Close, Blackrock D26B/0172/WEBBuilding started · 108 m
109 Roebuck Avenue, Blackrock CN0149255DRBuilding started · 153 m
1112, The Close D26B/0172/WEBApproved · 83 m
129, Roebuck Avenue C3A/0005/26No decision yet · 141 m
1318, Greenfield Road D26B/0196/WEBApproved · 150 m
1414, Saint Thomas Road D25B/0626/WEBApproved · 217 m
153, Greygates D26B/0083/WEBApproved · 260 m

Figure 5

What happens to applications within 500 m

Permission isn't building. Of 130 permissions since 2016, 74 show a start notice and 7 have a completion certificate. Most owners opt out of sign-off.

Purple bands are refusals turned into permissions on appeal. "No start notice found" includes small jobs that never needed one and notices we couldn't match.

Measured187 applications in 10 years · NPAD, An Coimisiún Pleanála, BCMS start notices and completion certificates

Figure 6

The next 30 days

5 deadlines within 500 m; the first closes 4 Nov 2026.

Comments closeTime to appeal ends

Comments close 4 Nov 20263 days left
3D26B/0522/WEB · application received — Permission sought for: 1) Demolition of the existing two storey extension over g
€20 to the council · 476 m away
Time to appeal ends 6 Nov 20265 days left
5D26A/0618/WEB · GRANT PERMISSION FOR RETENTION — The development consists of a canopy erected over service bays along with all a
€220 to An Coimisiún Pleanála (€110 observer) · 351 m away
Comments close 16 Nov 202615 days left
2D26A/0767/WEB · application received — planning permission for a domestic extension and works to existing two-storey se
€20 to the council · 460 m away
Time to appeal ends 17 Nov 202616 days left
4D26B/0476/WEB · GRANT PERMISSION — Single-storey flat roof extension to the side and rear, including the conversion
€220 to An Coimisiún Pleanála (€110 observer) · 325 m away
Comments close 26 Nov 202625 days left
1D26B/0554/WEB · application received — a) demolition of the existing single-storey, 5.5sqm rear return (northeast); b) construction of…
€20 to the council · 449 m away

Measuredcouncil registers and An Coimisiún Pleanála · deadlines worked out from the dates on file

Figure 7

Approved, stalled or planned, not built yet

68 homes 392 m away were approved Mar 2025 with no start notice yet; the permission runs to Mar 2030. BusConnects Core Bus Corridors is planned 282 m away.

Each row is a dated fact from a public register: no score and no forecast.

Measuredcouncil registers, BCMS, derelict sites registers, development plan layers (CC BY 4.0)

Sites that could change 2 within 500 m

Derelict building 1

6DERELICT, 65 DEERPARK ROAD · listed as derelict · 360 m

Approved, not started 1

Fosters Avenue · 68 homes approved Mar 2025, not started · 392 m

Sources: An Coimisiún Pleanála cases (ArcGIS feed), Building Control Management System (commencement notices), Derelict sites registers, Council meetings (ModernGov), National Planning Application Database, Residential Zoned Land Tax maps · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open
Derelict sites registers	CC BY 4.0	26 Oct 2026, 23:09	open
Council meetings (ModernGov)	Public	1 Nov 2026, 02:24	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open
Residential Zoned Land Tax maps	CC BY 4.0	25 Oct 2026, 23:43	open

Figure 8

Applications within 500 m, by year

Between 23 and 45 a year; busiest 2025. 84% of decisions were approvals.

ApprovedRefusedWithdrawn or invalidUndecided

2021 and 2026 are part years (*). Exemption requests and time extensions are left out.

Measuredcouncil register via NPAD

Open for comments €20 to comment

311 Trees Avenue, Mount Merrion, Blackrock, Co. Dublin, A94 W2A8 comments close 4 Nov 2026
Permission sought for: 1) Demolition of the existing two storey extension over g
D26B/0522/WEB30 Sept 2026476 m
229 Sycamore Road, Mount Merrion, Co. Dublin, A94Y3C1 comments close 16 Nov 2026
planning permission for a domestic extension and works to existing two-storey se
D26A/0767/WEB12 Oct 2026460 m
143 Hampton Park, Saint Helen's Wood, Booterstown, Co. Dublin, A94XN23 comments close 26 Nov 2026
a) demolition of the existing single-storey, 5.5sqm rear return (northeast); b) construction of a new flat…
D26B/0554/WEB22 Oct 2026449 m

Every application within 500 m 42 in the last 12 months

See every application on the map

19 Cypress Road, Mount Merrion, Blackrock, Co. Dublin, A94 N8H2 No decision yet
Partial demolition of the existing garage and dining kitchen to side and rear of
D26A/0707/WEB21 Sept 2026270 m
No.6, Wilson Crescent, Mount Merrion, Blackrock, Co. Dublin, A94 E4X0 No decision yet
1. Demolition of Existing 14.7Msq Free Standing Garage, 2. Proposed Ground Floor
D26B/0504/WEB17 Sept 2026472 m
79 Merrion Park, Blackrock, Co. Dublin, A94ED70 No decision yet
The development will consist of: the construction of a single-storey ground-flo
D26B/0498/WEB14 Sept 2026458 m
No.6, Wilson Crescent, Mount Merrion, Blackrock, Co. Dublin, A94 E4X0 Withdrawn or not valid
1. Proposed Ground Floor Extensions to South & West Elevations incl. New Front P
D26B/0491/WEB14 Sept 2026472 m
129, Roebuck Avenue, Mount Merrion, Co. Dublin, A94K3V6 No decision yet
Class 3A Exemption Application.
C3A/0005/2631 Aug 2026141 m
434 Wilson Road, Mount Merrion, Blackrock, Co. Dublin, A94F9N1 Approved
Single-storey flat roof extension to the side and rear, including the conversion
D26B/0476/WEB20 Oct 2026325 m
5Applegreen, Stillorgan Road, Blackrock, Dublin, A94AN81 Approved
The development consists of a canopy erected over service bays along with all a
D26A/0618/WEB9 Oct 2026351 m
Applegreen, Stillorgan Road, Blackrock, Co. Dublin, A94AN81 Withdrawn or not valid
The development consists of a canopy erected over service bays along with all a
D26A/0599/WEB12 Aug 2026351 m
4 The Rise, Mount Merrion, Blackrock, Dublin, A94KV00 Refused
Permission for subdivision of the existing site of (0.088 ha) known as No.4 The
D26A/0537/WEB8 Sept 2026325 m
32, Deerpark Road, Mount Merrion, Dublin, A94X7K4 Approved
a) Demolition of existing c.178sqm two-storey (plus non-habitable attic space),
D26A/0521/WEB31 Aug 2026441 m
4, The Rise, Mount Merrion, DUBLIN, A94KV00 Section 5: exempt
1
V/052/2630 Jul 2026325 m
4, The Rise, Mount Merrion, Dublin, A94KV00 Withdrawn or not valid
Permission for subdivision of the existing site of (0.088 ha) known as No.4 The
D26A/0509/WEB8 Jul 2026327 m
Part Ground Floor of Permitted Block A, University College Dublin, Belfield,Dublin 4 Approved
Planning permission for a Large-scale Residential Development (LRD) consisting o
LRD26A/0500/WEB26 Aug 2026443 m
57, Deerpark Road, Mount Merrion, DUBLIN, A94F761 Section 5: exempt
3 Units
V/050/2624 Jul 2026368 m
57, Deerpark Road, Mount Merrion, Dublin, A94F761 Approved
The development will include the demolition of - the existing end of terrace par
D26A/0493/WEB24 Aug 2026368 m
47, Deerpark Road, Mount Merrion, Co. Dublin, A94A9X5 Approved
The proposed amendment consists of the omission of the previously permitted det
D26A/0488/WEB20 Aug 2026402 m
26, Wilson Road, Mount Merrion, Blackrock, Co Dublin, A94R8X3 Approved
Demolition of the existing garage; construction of a single storey extension to
D26A/0480/WEB17 Aug 2026364 m
63, Deerpark Road, Mount Merrion, Blackrock, Dublin Section 5: needs permission
Change of use from (food preparation) retail to café/restaurant. It has been op
REF88267 Jul 2026349 m
36, Deerpark Road, Mount Merrion, Blackrock, Co Dublin, A94Y3K5 Approved
Ground level single storey rear extension, alterations to existing rear extensi
D26B/0337/WEB23 Jul 2026428 m
48, Deerpark Road, Mount Merrion, Co Dublin, A94K3T7 Approved
A first floor extension to front, side & rear of dwelling (floor area 31.30m.sq
D26B/0323/WEB22 Jul 2026387 m
48, Deerpark Road, Mount Merrion, Co Dublin, A94K3T7 Withdrawn or not valid
A first floor extension to front, side & rear o
D26B/0316/WEB29 May 2026387 m
National Mobility Hubs Pilot: Dún Laoghaire-Rathdown, 73 Locations Across the Council's Administrative Area, Dún Laoghaire-Rathdown No decision yet
73 mobility hub sites across the Council's administrative area
PC/IC/01/2622 May 2026275 m
11, Mather Road North, Mount Merrion, Dublin, A94CF62 Approved
Retention is sought for existing entrance pillar and permission is sought for t
D26B/0293/WEB8 Jul 2026348 m
93, South Avenue, Mount Merrion, Co. Dublin, A94F9X6 Approved
Additions and alterations to detached dwelling, including demolition of’ single
D26A/033224 Jun 2026482 m
8, Saint Thomas Mead, Mount Merrion, Dublin, A94N902 Approved
The development consists of an amendment and modification of the permission as
D26B/0231/WEB9 Jun 2026425 m
38A Greenfield Road (to west side of 38 Balnagowan, Greenfield Road), Mount Merrion, Blackrock, A94W2R6 Approved
The development will consist of a two-storey over basement detached dwelling on
D26A/0300/WEB11 Jun 2026132 m
8, Saint Thomas Mead, Mount Merrion, Blackrock, Co. Dublin, A94N902 Withdrawn or not valid
The development consists of an amendment and modification of the permission as
D26B/0225/WEB17 Apr 2026425 m
1318, Greenfield Road, Mount Merrion, Dublin, A94A0W7 Approved
The development will consist of: (i) demolition of the existing single-storey g
D26B/0196/WEB25 May 2026150 m
18, Greenfield Road, Mount Merrion, Dublin, A94A0W7 Withdrawn or not valid
The development will consist of: (i) demolition of the existing single-storey g
D26B/0182/WEB2 Apr 2026150 m
1112, The Close, Mount Merrion, Blackrock, Co. Dublin, A94DH57 Approved
The development will consist of (a) Demolition works to include (i) the 5.4sqm e
D26B/0172/WEB7 May 202683 m
Rossbeg, 24 Deerpark Road, Mount Merrion, Co Dublin, A94E0P4 Approved
Alterations and extensions to the existing single storey, three bedroom detache
D26A/0228/WEB19 May 2026497 m
153, Greygates, Stillorgan Road, Blackrock, Dublin, A94T9K0 Approved
Alterations to existing entrance canopy roof to form new front porch extension;
D26B/0083/WEB2 Apr 2026260 m
3, The Foster's, Mount Merrion, Dublin, A94TK64 Approved
The proposed development shall consist of: 1) Alterations to existing vehicular
D26A/0035/WEB13 Mar 2026357 m
The Gables, Sycamore Crescent, Mount Merrion, Dublin, A94Y8D2 Approved
Planning permission to: (i) Construct a two storey East facing side and front ex
D25B/0727/WEB20 Feb 2026373 m
56, Foster Avenue, Mount Merrion, Co. Dublin, A94N292 Approved
The conversion of the attic to a bedroom and ensuite. The works will also consis
D25B/0689/WEB9 Feb 2026399 m
69 Deerpark Road (first floor), Mount Merrion, Blackrock, County Dublin, A94E9D3 Approved
A change of use into a dental practice, including associated signage and all re
D25A/0906/WEB27 Feb 2026328 m
57, Deerpark Road, Mount Merrion, Dublin, A94F761 Refused
Permission is sought for development comprising- The development will include
D25A/0856/WEB9 Jan 2026368 m
1414, Saint Thomas Road, Mount Merrion, Blackrock, Co. Dublin, A94 AE89 Approved
Redevelopment of existing 2 storey 3 bedroom semi-detached house. Works to inclu
D25B/0626/WEB23 Dec 2025217 m
838A Greenfield Road (to west side of 38 Balnagowan, Greenfield Road), Mount Merrion, Blackrock, Co. Dublin A94W2R6 Refused
Two-storey over basement detached dwelling on a 0.045-hectare site. The accommod
D25A/0842/WEB9 Jan 2026132 m

How we work this out

Descriptions are shortened by the national planning database (to 80 characters in Dún Laoghaire-Rathdown, 70 in Fingal), and it does not publish applicants' names.

Sources: National Planning Application Database, An Coimisiún Pleanála cases (ArcGIS feed), Building Control Management System (commencement notices) · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open

Building work nearby 18 in the last 12 months

2 not signed off16 no sign-off needed

Mount merrion, Dublin, A94 TK64 · 3 Nov 2026 · start notice, opted out no sign-off needed · D26A/0035/WEB · 373 m
109 Roebuck Avenue, Blackrock, Dublin · 30 Oct 2026 · 1 homes · short notice no sign-off needed · 153 m
93 South Avenue, Blackrock, Dublin, A94 F9X6 · 29 Oct 2026 · 1 homes · start notice, opted out no sign-off needed · D26A/0332 · 496 m
39 Wilson Road, Blackrock, Dublin, A94 P3Y9 · 21 Sept 2026 · 1 homes · start notice, opted out no sign-off needed · D25B/0046/WEB · 339 m
11 Mather Road North, Blackrock, Dublin, A94 CF62 · 7 Sept 2026 · 1 homes · start notice, opted out no sign-off needed · D26B/0293/WEB · 358 m
912 The Close, Blackrock, Dublin, A94 DH57 · 14 Aug 2026 · 1 homes · short notice no sign-off needed · D26B/0172/WEB · 108 m
40 Wilson Road, Blackrock, Dublin, A94 H2Y9 · 4 Aug 2026 · 1 homes · start notice, opted out no sign-off needed · D25B/0472 · 319 m
66 The Rise, Blackrock, Dublin, A94 X9F6 · 27 Jul 2026 · 1 homes · start notice, opted out no sign-off needed · D25B/0292 · 268 m
Sycamore Crescent, Dublin, A94Y8D2 · 22 Jul 2026 · 1 homes · start notice, opted out no sign-off needed · D25B/0727/WEB · 395 m
75 Deerpark Road, Dublin, Dún Laoghaire-Rathdown · 28 May 2026 · 1 homes · start notice, opted out no sign-off needed · D25A/0699/WEB · 342 m
11 Cypress Road, Blackrock, Dún Laoghaire-Rathdown, A94 F5C7 · 18 May 2026 · start notice, opted out no sign-off needed · D25B/0259/WEB · 310 m
44A Foster Avenue, Blackrock, Dún Laoghaire-Rathdown, A94 W963 · 13 Apr 2026 · 1 homes · start notice, opted out no sign-off needed · D25A/0737/WEB · 402 m
9 Roebuck Avenue, Blackrock, Dún Laoghaire-Rathdown, A94 K3V6 · 6 Apr 2026 · 1 homes · start notice, opted out no sign-off needed · D24A/0855/WEB & ABP-321631 · 153 m
15 The Rise, Blackrock, Dún Laoghaire-Rathdown, A94 CF74 · 3 Apr 2026 · 1 homes · start notice, opted out no sign-off needed · D24A/0706/WEB · 207 m
34 Mather Road North, Mount Merrion, Blackrock, Dublin, A94 Y319, Blackrock, Dún Laoghaire-Rathdown, A94 Y319 · 30 Mar 2026 · 1 homes · short notice no sign-off needed · D25A/0546/WEB · 482 m
47 Deerpark Road, Blackrock, Dún Laoghaire-Rathdown, A94 A9X5 · 22 Jan 2026 · start notice, opted out no sign-off needed · D25A/0467/WEB · 418 m
The Rise, Mount Merrion, Dún Laoghaire-Rathdown, A94 E283 · 17 Nov 2025 · start notice not signed off · D23A/0600 · 421 m
73 Deerpark Road, Blackrock, Dún Laoghaire-Rathdown, A94 C4E7 · 7 Nov 2025 · 7-day notice not signed off · D25A/0292 · 325 m

How we work this out

Each row is a notice the builder sent to the council's building control office before work started. One notice can cover many homes. 'Signed off as finished' means a completion certificate is on file; work done under an opt-out or a short notice doesn't need one.

Source: Building Control Management System (commencement notices) · fetched 1 Nov 2026, 03:07

Source	Licence	Fetched	Link
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open

Homes coming 68 not started

7Fosters Avenue · 68 homes · not started · runs out 18 Mar 2030 · 392 m

Mt Anville Crescent, Mount Anville Road, Mount Merrion, Co Dublin. · Stage 2 pre planning · 38 homes · 208 m

How we work this out

Schemes of 10 or more homes approved since 2021, from the council and An Coimisiún Pleanála registers. 'Building started' means the builder told the council's building control office that work was starting (a commencement notice).

Sources: An Coimisiún Pleanála cases (ArcGIS feed), Building Control Management System (commencement notices), National Planning Application Database, Social housing construction status report · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open
Social housing construction status report	CC BY-SA 4.0	23 Oct 2026, 23:02	open

Named places nearby: estate, schemes, crèches, schools

Named places estate, developments, inspections

Developments within 1.0 km

Scheme	Homes	Progress	Distance
Unit 1	48	48 built (2025-Q4)	250 m
Fosters Avenue	69	69 being built (2026-Q2)	340 m
Part Ground Floor of Permitted Block A	—	—	443 m
DLR D17A/0240	64	64 built (2025-Q1)	722 m
45 Woodlands Park	38	38 not started (2025-Q2)	735 m
Grove Lodge	26	26 built (2025-Q4)	735 m
Merrion at	—	—	762 m
Merrion	—	—	762 m

Crèches and schools inspected

Name	Latest inspection	Distance
Fontanelles Montessori · Crèche	11 Jun 2026 · report · Tusla Early Years Inspectorate	297 m
The Park Academy Childcare Thornwood · Crèche	8 Sept 2025 · report · Tusla Early Years Inspectorate	356 m
Coco's Childcare · Crèche	26 Feb 2026 · report · Tusla Early Years Inspectorate	793 m
Oatlands Pre,After, Montessori, School Age Childcare · Crèche	11 Sept 2025 · report · Tusla Early Years Inspectorate	885 m

How we work this out

Organisations only: a person named on an application is never listed. Inspection dates and links are the publisher's; read their report for the findings.

Sources: Dublin housing delivery pipeline, National Planning Application Database, Department of Education school list, Tusla early years register · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
Dublin housing delivery pipeline	CC BY 4.0	26 Oct 2026, 23:00	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open
Department of Education school list	CC BY 4.0	27 Oct 2026, 23:04	open
Tusla early years register	Public register	28 Oct 2026, 23:19	open

How busy is this area Busier than most of Dún Laoghaire-Rathdown County Council.

Homes approved

Here399

Council middle44

Homes started

Here343

Council middle92

How we work this out

Homes approved counts schemes of 10 or more homes (one-off houses are not included). Homes started counts every home in a notice that building work was starting. The council figure is the middle value across the council's built-up squares of the same area (3.1 km², about a 1 km circle), so half of them saw more and half fewer.

Sources: An Coimisiún Pleanála cases (ArcGIS feed), Building Control Management System (commencement notices), National Planning Application Database · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
An Coimisiún Pleanála cases (ArcGIS feed)	CC BY 4.0	30 Oct 2026, 23:01	open
Building Control Management System (commencement notices)	CC BY 4.0	1 Nov 2026, 03:07	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open

Question 5

What's the area like?

Figure 9

This street block against the council

94% of homes built before 1971 (council 38%). 93% owner-occupied (council 68%).

Homes built before 1971

94% · council 38%

Homes built since 2001

5% · council 25%

Owner-occupied

93% · council 68%

Rented

7% · council 29%

Children under 15

19% · council 18%

Aged 65 and over

22% · council 17%

Households with 2+ cars

57% · council 39%

Work mainly from home

18% · council 19%

This small area (310 people)Dún Laoghaire-Rathdown

MeasuredCSO Census 2022, Small Area Population Statistics (CC BY 4.0) · small area 267128007

Bus

137 m

Greenfield Road · 47 · busiest stop within 500 m: 27 an hour at peak

Planned

282 m

BusConnects Core Bus Corridors, City to Bray

Radon

1 in 20

homes here likely high (EPA). Test it

Nearest school

422 m

S N San Treasa, 430 pupils

Homes sold nearby

in 3 years (Property Price Register)

Schools, stops and the council

Schools

S N San Treasa · primary · 430 pupils · 422 m
Coláiste Eoin · postprimary · 517 pupils · 535 m
Coláiste Íosagáin · postprimary · 488 pupils · 550 m
Gaelscoil Laighean · primary · 130 pupils · 809 m
Oatlands College · postprimary · 623 pupils · 826 m
Oatlands Primary School, An Edmund Rice School · primary · 428 pupils · 876 m
St Andrews College · postprimary · 1011 pupils · 934 m
Our Lady Of Mercy Convent School · primary · 247 pupils · 958 m

Stops 44

Greenfield Road · 47 · 137 m
Greenfield Road · 47 · 150 m
Mather Road North · 47 · 239 m
Mather Road North · 47 · 260 m
Booterstown Avenue · 116, 118, 47, 7B, 7D, E1 · 27/hour at peak · 282 m
Deer Park · 47 · 293 m
Booterstown Avenue · 116, 181, 46n, 47, 7B, 7D · 19/hour at peak · 318 m
Greenfield Road · 116, 118, 181, 47, 7B, 7D · 27/hour at peak · 323 m

Schools growing or shrinking planning in 3 years · pupils last year

S N San Treasa · 422 m+1.2% pupils (430)
Coláiste Eoin · 535 m+1.4% pupils (517)
Coláiste Íosagáin · 550 m0% pupils (488)
Gaelscoil Laighean · 808 m+23.8% pupils (130)
Oatlands College · 826 m-1.7% pupils (623)
Oatlands Primary School, An Edmund Rice School · 876 m+1.9% pupils (428)

Council meetings 2 items

7 Sept 2026 · Tree Pruning in Foxrock
11 May 2026 · Taking in Charge at Oatlands Manor, Mount Merrion, Blackrock, Co. Dublin

Public land

Dublin City Council · 0.34 ha · 283 m
Dún Laoghaire-Rathdown County Council · 10 ha · 313 m
Dublin City Council · 0.19 ha · 382 m

Sources: Public transport stops and routes (NTA GTFS), Department of Education school list, National Planning Application Database, Council consultation portals, Council meetings (ModernGov), Land Development Agency public land register, cso_saps_2022, National Transport Authority, Fingal County Council and Dún Laoghaire-Rathdown County Council development plan layers (CC BY 4.0), dartplus.ie project extents over NTA GTFS rail shapes (CC BY 4.0), EPA strategic noise maps, Fingal County Council · fetched 1 Nov 2026, 05:02

Source	Licence	Fetched	Link
Public transport stops and routes (NTA GTFS)	CC BY 4.0	25 Oct 2026, 23:02	open
Department of Education school list	CC BY 4.0	27 Oct 2026, 23:04	open
National Planning Application Database	CC BY 4.0	1 Nov 2026, 05:02	open
Council consultation portals	Public	1 Nov 2026, 01:08	open
Council meetings (ModernGov)	Public	1 Nov 2026, 02:24	open
Land Development Agency public land register	CC BY 4.0	11 Sept 2026, 16:43	open
cso_saps_2022	CC BY 4.0	—	open
National Transport Authority	CC BY 4.0	—	—
Fingal County Council and Dún Laoghaire-Rathdown County Council development plan layers (CC BY 4.0)	CC BY 4.0	—	—
dartplus.ie project extents over NTA GTFS rail shapes (CC BY 4.0)	CC BY 4.0	—	—
EPA strategic noise maps	CC BY 4.0	—	—
Fingal County Council	CC BY 4.0	—	—

Question 6

What to ask, and who

Application 449 m away open for comments until 26 Nov 2026: comment?
Ask for: The plans on the council's website (€20 to comment).
Council
Any work done without planning permission?
Ask for: An opinion of compliance for the whole house.
Seller · solicitor

Reference

Where this is, the terms, the sources

Townland: Mount Merrion or Callary
Electoral division: Stillorgan-Mount Merrion
Electoral area: Stillorgan
Council: Dun Laoghaire-Rathdown County Council

Everything we found, as a list 8 lines

Zoned R2 (existing residential); not protected; no vacant land tax.
2 sites nearby could change: 1 derelict, 1 approved scheme.
3 applications open for comments nearby; nearest closes 26 Nov 2026.
68 homes approved nearby, not started; largest 68 at Fosters Avenue.
St Thomas Road (bus 116, 118) 490 m away: 28 an hour at morning peak; 122 from all stops within 500 m. Planned: BusConnects Core Bus Corridors 282 m away, core bus corridor (DLR County Development Plan 2022-2028).
Here (2022 census): 92% owner-occupied (council 68%); 5% of homes empty (council 6%); most built 1919–1945; 50% drive to work (council 43%); population up 3% since 2016.
2 home extensions within 250 m since 2025.
Around here the council decides in a median 53 days (about 8 weeks); 1 in 14 is asked for more information.

What the terms mean 8 terms

Vacant land tax (Residential Zoned Land Tax (RZLT)): A yearly tax of 3% of the land's value on land that is zoned for homes and serviced but left unbuilt.
Building started (Commencement notice (BCMS)): The builder must tell the council's building control office 14 to 28 days before work starts.
Signed off as finished (Certificate of Compliance on Completion): A certificate filed when a building is finished, confirming it meets the building regulations.
Approved (Grant of permission): The council said yes, usually with conditions.
Listed by the council as derelict (Derelict Sites Register): Councils keep a public list of land and buildings in a ruinous or dangerous state.
Comment on an application (Observation / submission): Anyone can comment on a planning application within five weeks of it being lodged, for a €20 fee.
Appeal (Appeal to An Coimisiún Pleanála): The applicant, or anyone who commented in time, can appeal the council's decision within four weeks.
What the land is zoned for (Zoning objective): The council's development plan sets what each area is for: homes, shops, open space and so on.

Sources and licences 29

Source	Publisher	Licence	Fetched
EPA strategic noise maps	—	CC BY 4.0	—
Fingal County Council	—	CC BY 4.0	—
Fingal County Council and Dún Laoghaire-Rathdown County Council development plan layers (CC BY 4.0)	—	CC BY 4.0	—
National Transport Authority	—	CC BY 4.0	—
services-eu1.arcgis.com	An Coimisiún Pleanála	CC BY 4.0	30 Oct 2026
data.nbco.gov.ie	National Building Control Office (BCMS)	CC BY 4.0	1 Nov 2026
data.gov.ie	Various (see each layer)	CC BY 4.0, CC BY-NC-ND 4.0	27 Sept 2026
gis.epa.ie	Environmental Protection Agency	CC BY 4.0	27 Sept 2026
services.arcgis.com	Local authorities (Record of Protected Structures)	CC BY 4.0	27 Sept 2026
services-eu1.arcgis.com	National Monuments Service (SMR)	CC BY 4.0	27 Sept 2026
dlrcoco.citizenspace.com	Local authorities (consultation portals)	Public	1 Nov 2026
www2.courts.ie	—	© the publisher	31 Oct 2026
cso.ie	—	CC BY 4.0	—
dartplus.ie project extents over NTA GTFS rail shapes (CC BY 4.0)	—	CC BY 4.0	—
services-eu1.arcgis.com	Local authorities (derelict sites registers)	CC BY 4.0	26 Oct 2026
services.arcgis.com	Dublin local authorities (housing delivery pipeline)	CC BY 4.0	26 Oct 2026
esbnetworks.ie	—	© the publisher · flag only	11 Sept 2026
transportforireland.ie	National Transport Authority	CC BY 4.0	25 Oct 2026
lda.ie	Land Development Agency	CC BY 4.0	11 Sept 2026
meetings.fingal.ie	Local authorities (council meetings)	Public	1 Nov 2026
services.arcgis.com	Department of Housing (National Planning Application Database)	CC BY 4.0	1 Nov 2026
services-eu1.arcgis.com	Tailte Éireann	CC BY 4.0	11 Sept 2026
services-eu1.arcgis.com	CSO, Tailte Éireann, OpenStreetMap contributors	CC BY 4.0	4 Oct 2026
propertypriceregister.ie	Property Services Regulatory Authority (PPR)	© PSRA, PSI licence	1 Nov 2026
services.arcgis.com	Local authorities (RZLT maps)	CC BY 4.0	25 Oct 2026
gov.ie	Department of Education	CC BY 4.0	27 Oct 2026
gov.ie	Department of Housing	CC BY-SA 4.0	23 Oct 2026
tusla.ie	Tusla (Early Years Inspectorate)	Public register	28 Oct 2026
services.arcgis.com	Local authorities via the Department of Housing (GZT / MyPlan)	CC BY 4.0	25 Oct 2026

Measured

counted from a public register

Calculated

a rate or median we worked out from those counts

Our classification

we sorted it by reading each description

Estimate

inferred from another source (census, map data)

Rule summary

the law, simplified: check before relying on it

How we work this out

Generated 1 Nov 2026, 20:00 from the Planning Register store; nothing was fetched live. Not a legal search: the council's planning file is the record. Deadlines come from published dates under the Planning and Development Act 2000: confirm with the council before relying on them. Street map © OpenStreetMap contributors; building outlines © Overture Maps Foundation. The text version carries every figure with its source, for an AI assistant.

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