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Planning report · South Dublin County Council · 500 m around the house · the last 12 months · 17 Oct 2026, 17:35

Knocklyon Close

53.28541, -6.31991

Homes here mostly date from the 1970s. 2 planning files on this house, the latest from 2003. Home extensions nearby almost always get approved (96%). 11 homes approved 401 m away haven't started.

See on the mapWatch this area
Distance
250 m500 m1 km2 km
Time
12 months2 years5 years
2planning files on this houselatest 200396%of home extensions approved nearbyn=710 · 1.5 km · 10 yrs55 daystypical wait for a decisionmiddle half 51–551open for comments nearbyclose 23 Oct11homes approved nearby, not startednearest 401 m · SD17A/0364

How planning works, with this area's numbers

steps can overlap · medians for home extensions within 1.5 km, 10 years
  1. 1ApplySite notice up, plans online
  2. 2Comments5 weeks, €20. Comment to keep your right to appeal
  3. 3Decision8 weeks by law. Here 55 days
  4. 4Appeal window4 weeks after the decision
  5. 5AppealHere about 4 months
  6. 6PermissionLasts 5 years
  7. 7StartStart notice to the council. Here about 5 months after
  8. 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 1971–80, after planning permission began and before building regulations (1992). 2 planning files on this house, the latest from 2004.

Timeline from 1955: planning permission needed from October 1964, building regulations from June 1992, building records online from March 2014, sign-off opt-out from September 2015. Most homes here were built 1971–1980. 2 planning files on this house.1960197019801990200020102020Oct 1964permission neededJun 1992building regulationsMar 2014building records onlineSep 2015owners may opt out of sign-offThis houseAll of Knocklyon CloseBuilt: most homes in this small area date from 1971–1980 (census estimate)most built2004: SD03B/0529 · porch, approved2003: SD03B/0427 · porch, withdrawn or invalid1998: 1 file on Knocklyon Close1999: 3 files on Knocklyon Close2000: 1 file on Knocklyon Close2001: 4 files on Knocklyon Close2003: 3 files on Knocklyon Close2004: 1 file on Knocklyon Close2005: 2 files on Knocklyon Close2006: 3 files on Knocklyon Close2007: 3 files on Knocklyon Close2008: 1 file on Knocklyon Close2010: 1 file on Knocklyon Close2012: 1 file on Knocklyon Close2013: 1 file on Knocklyon Close2014: 2 files on Knocklyon Close2015: 1 file on Knocklyon Close2016: 1 file on Knocklyon Close2017: 1 file on Knocklyon Close2021: 1 file on Knocklyon Close2022: 2 files on Knocklyon Close2026: 1 file on Knocklyon Close34 files

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

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

  1. 2004
    SD03B/0529 · porch · approved 2004 · built? unknown
    approvedstarted?signed off?
  2. 2003
    SD03B/0427 · porch · withdrawn
    approved?started?signed off?
On this site
R2
Zoning · Existing residential
No
Protected or listed · on the council's list
No
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

RES: To protect and/or improve residential amenity

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.

south dublin county development plan 2022 2028 · 8 Mar 2022 – 8 Mar 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 mCountFor example
Heritage inventory buildings2Knocklyon House; Idrone
Radon grid squares3
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.
Sources: Development plan zoning (councils), EPA radon map, Residential Zoned Land Tax maps, Constraint layers (bundle), National Inventory of Architectural Heritage · fetched 12 Oct 2026, 00:14
SourceLicenceFetchedLink
Development plan zoning (councils)CC BY 4.011 Oct 2026, 23:18open
EPA radon mapCC BY 4.027 Sept 2026, 19:36open
Residential Zoned Land Tax mapsCC BY 4.012 Oct 2026, 00:14open
Constraint layers (bundle)CC BY 4.0, CC BY-NC-ND 4.027 Sept 2026, 19:37open
National Inventory of Architectural HeritageCC BY 4.027 Sept 2026, 19:35open
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 17 Oct 2026, 02:05
SourceLicenceFetchedLink
Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
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 are almost always approved here: 87–100% by type. A new house in a garden is harder: 77% approved, and 1 in 2 are asked for more information.

Single-storey rear107 decided · more info asked 8%
96% · council 94%
Two-storey rear29 decided · more info asked 21%
97% · council 94%
Two-storey side27 decided · more info asked 37%
96% · council 94%
Single-storey side30 decided · more info asked 13%
100% · council 95%
Attic or dormer369 decided · more info asked 18%
98% · council 95%
First-floor23 decided · more info asked 13%
87% · council 92%
Garage conversion34 decided · more info asked 18%
100% · council 99%
Porch or front34 decided · more info asked 3%
97% · council 95%
New house in a garden or site53 decided · more info asked 53%
77% · council 62%
Approved nearbySouth Dublin 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 · 706 nearby, 4,865 council-wide

Figure 3

Knocklyon Close, file by file since 1998

19 of 19 decided extensions on the road were approved. New houses in side gardens or on sites: 6 of 8.

34 planning files on Knocklyon Close since 1998, by kind and decision.199820002002200420062008201020122014201620182020202220242026Extensions, atticsNo. 14 · 1998 · garage conversion · approved · S98B/0308No. 18 · 1999 · garage conversion · approved · S99B/0243No. 25 · 1999 · two-storey side · approved · S99B/0522No. 5 · 2000 · first-floor · approved · S00B/0049No. 14 · 2001 · garage conversion · approved · S01B/0194No. 18 · 2001 · garage conversion · approved · S01B/0609No. 20 · 2001 · garage conversion · undecided · S01B/0647No. 27 · 2003 · porch / front · approved · SD03B/0107No. 19 · 2003 · first-floor · withdrawn or invalid · SD03B/0427No. 19 · 2003 · first-floor · approved · SD03B/0529No. 2 · 2005 · single-storey rear · approved · SD05B/0159No. 8 · 2005 · garage conversion · approved · SD05B/0210No. 1 · 2006 · attic conversion / dormer · approved · SD06B/0172No. 23 · 2007 · single-storey rear · approved · SD07B/0265No. 25 · 2007 · single-storey rear · approved · SD07B/0354No. 12 · 2010 · garage conversion · approved · SD10B/0213No. 20 · 2012 · garage conversion · approved · SD12B/0060No. 3 · 2014 · single-storey rear · approved · SD14B/0090No. 13 · 2015 · garage conversion · approved · SD15B/0110No. 9 · 2021 · garage conversion · approved · SD21B/0021No. 9 · 2026 · first-floor · approved · SD26B/0156WPorches, roofs, otherNo. 2 · 2004 · other work · refused · SD04A/0482No. 2 · 2006 · other work · refused · SD06A/0160No. 23 · 2007 · other work · refused · SD07A/0770No. 23A · 2014 · other work · approved · SD14B/0274New house in a side gardenNo. 2 · 1999 · new house · refused · S99A/08512No. 2 · 2001 · new house · undecided · S01A/07132No. 23 · 2006 · new house · refused · SD06A/005123No. 1 · 2008 · new house · approved · SD08A/04681No. 23 · 2013 · new house · approved · SD13A/016323No. 1 · 2016 · new house · approved · SD16A/03071No. 23 · 2017 · new house · approved · SD17A/017223No. 1 · 2022 · new house · approved · SD22A/00361No. 23 · 2022 · new house · approved · SD22A/0450
ApprovedRefusedWithdrawn or invalid

34 files with "Knocklyon Close" in the address within 600 m, other roads of the same name left out. Hover a dot for the house number and reference.

MeasuredOur classificationcouncil register via NPAD · 1998–2026

Extensions and refusals right beside you 4 within 250 m · 0 refused within 100 m

Extensions and refusals near you 4 extensions within 250 m · the last 12 months

4 approved
KindAppliedApprovedRefused
Dormer or attic22—
First-floor11—
Two-storey rear11—

On Knocklyon Woods: 35 extensions in 10 years, 88% of all applications approved; most common two-storey side.

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 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Sources: An Coimisiún Pleanála cases (ArcGIS feed), Building Control Management System (commencement notices), National Planning Application Database · fetched 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Question 3

    How long, and what if someone objects?

    Figure 4

    A home extension's journey here

    A decision takes 55 days. 1 in 6 is asked for more information, which adds about 62 days. Building starts about 5 months after permission.

    Comments open: 5 weeks · €20; Council decision: 55 days; If more info asked (1 in 6): 117 days; Appeal window: 4 weeks; If appealed: +125 days; Building starts: 143 days after permission0 mo3 mo6 mo9 mo12 mo15 moComments openComments close 5 weeks after the application is lodged5 weeks · €20Council decisionDecision: median 55 days, middle half 51–55 (n=594)55 daysIf more info asked (1 in 6)With further information: median 117 days (n=115)117 daysAppeal windowAnyone who commented can appeal within 4 weeks of the decision4 weeksIf appealedAt An Coimisiún Pleanála: median 125 days (n=64, all appeals within 1.5 km)+125 daysBuilding startsStart notice: median 143 days after permission (n=347)143 days after permissionSigned off414 days after the start, for the few who file. 44% of owners opt out of sign-off

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

    Calculated710 decided home extensions, 352 start notices, 64 decided appeals · within 1.5 km, 10 years · NPAD, BCMS, An Coimisiún Pleanála

    Figure 5

    What appeals changed

    11 of 25 appealed refusals became permissions. 3 of 39 appealed approvals were reversed.

    Refusals appealed25 decided
    11 became permissions
    Approvals appealed39 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 2 in the last 12 months

    None of 2 changed the council's decision

    • 501266 Refused · 15, Knocklyon Park, Templeogue, Dublin 16, D16 N1W8 · 321 m report
    • 500186 Granted with conditions · 32, Knocklyon Heights, Knocklyon, Dublin 16, D16P2K0 · 262 m report
    Sources: An Coimisiún Pleanála cases (ArcGIS feed), Courts Service legal diary (judicial reviews), National Planning Application Database · fetched 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Courts Service legal diary (judicial reviews)© the publisher17 Oct 2026, 01:34open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Question 4

    What's changing around you?

    Street map around Knocklyon Close with 15 numbered planning items
    ⌖ the houseOpen for commentsWindow closingApproved, not startedBuilding startedApprovedOtherRefused
    1. 165, Knockaire SD26B/0419WNo decision yet · 435 m
    2. 222 Coolamber Park, Knocklyon SD26B/0372WNo decision yet · 360 m
    3. 3Vista Montana SD17A/0364Approved, no sign building has started · 401 m
    4. 423 Knocklyon Close, Dublin SD22A/0450Building started · 19 m
    5. 516 Idrone Park, Knocklyon SD26B/0062WBuilding started · 132 m
    6. 69, Knocklyon Close SD26B/0156WApproved · 31 m
    7. 718 Idrone Park, Knocklyon SD26B/0309WApproved · 138 m
    8. 82 Mount Alton Court, Knocklyon SD26B/0225WApproved · 172 m
    9. 92, Knocklyon Avenue SD26B/0032WApproved · 198 m
    10. 1030, Idrone Drive SD26B/0092Approved · 216 m
    11. 11Iona Pastoral Community Centre, Idrone Avenue ED26/0081Section 5: exempt · 235 m
    12. 1275, Idrone Park ED26/0098Section 5: exempt · 282 m
    13. 1315, Knocklyon Park SD26B/0056WRefused · 321 m
    14. 1427, Green Acre Court SD26B/0127WApproved · 371 m
    15. 1520, Coolamber Park SD25B/0658WApproved · 408 m
    Figure 6

    What happens to applications within 500 m

    Permission isn't building. Of 116 permissions since 2016, 50 show a start notice and 4 have a completion certificate.

    138 applications lodged within 500 m. Council: 117 approved, 6 refused. After appeals: 116 approved. Of those: 4 signed off, 24 built with the owner's opt-out, 22 started, 63 with no start notice found, 3 ran out.LODGEDCOUNCIL DECISIONAFTER APPEALSWHAT HAPPENED NEXT117: lodged → approved6: lodged → refused10: lodged → withdrawn or invalid5: lodged → undecided116: approved → approved6: refused → refused10: withdrawn or invalid → withdrawn5: undecided → undecided1 approved by the council, withdrawn or invalid after an appeal63: approved → no start notice found24: approved → built, owner opted out22: approved → started, not signed off4: approved → signed off3: approved → ran out138 lodged138 lodged117 approved117 approved6 refused6 refused10 withdrawn or invalid10 withdrawn or invalid5 undecided5 undecided116 approved116 approved6 refused6 refused11 withdrawn11 withdrawn5 undecided5 undecided63 no start notice found63 no start notice found24 built, owner opted out24 built, owner opted out22 started, not signed off22 started, not signed off4 signed off4 signed off3 ran out3 ran out

    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.

    Measured138 applications in 10 years · NPAD, An Coimisiún Pleanála, BCMS start notices and completion certificates

    Figure 7

    The next 30 days

    3 deadlines within 500 m; the first closes 20 Oct 2026.

    3 deadlines in the next 30 days: 2026-10-20 ACP 501266: Refuse permission; 2026-10-23 SD26B/0419W: application received — Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w ; 2026-10-28 SD26B/0372W: Request Additional Information — Retention for a flat roof over the existing front porch extension; revised ground floor front elevation fenestration; retoday22 Oct27 Oct1 Nov6 Nov11 Nov16 NovACP 501266: Refuse permission · 321 m away · 2026-10-20SD26B/0419W: application received — Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w · 435 m away · 2026-10-23SD26B/0372W: Request Additional Information — Retention for a flat roof over the existing front porch extension; revised ground floor front elevation fenestration; re · 360 m away · 2026-10-28
    Comments closeTime to appeal endsHigh Court window ends
    • Time to ask the High Court for a review ends 20 Oct 20263 days left
      Refuse permission
      321 m away
    • Comments close 23 Oct 20266 days left
      1SD26B/0419W · application received — Conversion of existing attic space comprising of modification of existing roof structure,…
      €20 to the council · 435 m away
    • Time to appeal ends 28 Oct 202611 days left
      2SD26B/0372W · Request Additional Information — Retention for a flat roof over the existing front porch extension; revised ground…
      €220 to An Coimisiún Pleanála (€110 observer) · 360 m away

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

    Figure 8

    Approved, stalled or planned, not built yet

    11 homes 401 m away were approved May 2018 with no start notice yet; the permission runs to Jul 2031.

    Vista Montana · 11 homes: 11 homes approved May 2018, not started201820192020202120222023202420252026202720282029203020312032Vista Montana · 11 homes401 m · SD17A/036411 homes approved May 2018, not started11 homes approved May 2018, not startedtoday

    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 1 within 500 m

    Approved, not started 1

    • Vista Montana · 11 homes approved May 2018, not started · 401 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 17 Oct 2026, 02:12
    SourceLicenceFetchedLink
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
    Derelict sites registersCC BY 4.012 Oct 2026, 23:08open
    Council meetings (ModernGov)Public17 Oct 2026, 02:12open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Residential Zoned Land Tax mapsCC BY 4.012 Oct 2026, 00:14open
    Figure 9

    Applications within 500 m, by year

    Between 6 and 20 a year; busiest 2025. 95% of decisions were approvals.

    2016: 2, 2017: 9, 2018: 13, 2019: 8, 2020: 18, 2021: 19, 2022: 16, 2023: 15, 2024: 6, 2025: 20, 2026: 12051015202016: 2 approved2’16*2017: 9 approved9’172018: 11 approved2018: 2 refused13’182019: 8 approved8’192020: 16 approved2020: 1 refused2020: 1 withdrawn or invalid18’202021: 13 approved2021: 1 refused2021: 5 withdrawn or invalid19’212022: 13 approved2022: 1 refused2022: 1 withdrawn or invalid2022: 1 undecided16’222023: 13 approved2023: 2 withdrawn or invalid15’232024: 6 approved6’242025: 18 approved2025: 1 withdrawn or invalid2025: 1 undecided20’252026: 8 approved2026: 1 refused2026: 3 undecided12’26*
    ApprovedRefusedWithdrawn or invalidUndecided

    2016 and 2026 are part years (*). Exemption requests and time extensions are left out.

    Measuredcouncil register via NPAD

    Open for comments €20 to comment

    Every application within 500 m 16 in the last 12 months

    See every application on the map

    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 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
    Building work nearby 8 in the last 12 months
    8 no sign-off needed
    • 2 Knocklyon Avenue, Dublin 16, Dublin, D16 H3K8 · 7 Sept 2026 · start notice, opted out no sign-off needed · SD26B/0032W · 211 m
    • 3 Knocklyon Avenue, Dublin 16, Dublin, D16 Y9P0 · 20 Aug 2026 · start notice, opted out no sign-off needed · SD21B/0649 · 234 m
    • 423 Knocklyon Close, Dublin, D16FA44 · 14 Jul 2026 · 1 homes · start notice, opted out no sign-off needed · SD22A/0450 · 19 m
    • 516 Idrone Park, Knocklyon, South Dublin, D16 PX29 · 29 May 2026 · start notice, opted out no sign-off needed · SD26B/0062W · 132 m
    • 15 Knocklyon Park, Knocklyon, South Dublin, D16 N1W8 · 28 May 2026 · short notice no sign-off needed · SD25B/0061W · 335 m
    • 20 Coolamber Park, Knocklyon, South Dublin, D16 E4W0 · 28 Mar 2026 · short notice no sign-off needed · SD25B/0658W · 418 m
    • 5A Knocklyon Avenue, Knocklyon, South Dublin, D16 WV38 · 27 Mar 2026 · short notice no sign-off needed · SD25B/0433W · 217 m
    • 65 Cremorne, South Dublin, D16 A8P3 · 26 Nov 2025 · short notice no sign-off needed · SD23B/0504 · 378 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 17 Oct 2026, 01:09
    SourceLicenceFetchedLink
    Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
    Homes coming 11 not started
    • 3Vista Montana · 11 homes · not started · runs out 2 Jul 2031 · 401 m
    • Castlefield, Knocklyon, Dublin 16 · Stage 2 pre planning · 17 homes · 357 m
    • Homeville, Knocklyon, Dublin 16 · Completed · 16 homes · 357 m
    How we work this out
    Schemes of 10 or more homes approved since 2019, 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 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Social housing construction status reportCC BY-SA 4.09 Oct 2026, 23:01open
    Named places nearby: estate, schemes, crèches, schools

    Named places estate, developments, inspections

    Estate: Knocklyon Woods · 52 applications in 10 years · 88% approved · most common: two-storey side

    Developments within 1.0 km

    SchemeHomesProgressDistance
    Knocklyon to Ballyboden Active and Sustainable Travel Scheme——53 m
    Dodder Greenway——424 m
    SDCC Lands @28 Locations——449 m
    Dodder Valley Park——459 m
    Castlefield Avenue3131 not started (2026-Q2)542 m
    Proposed Social and Affordable Mixed Tenure Housing Developm29—542 m
    Beechpark and Maryfield590—608 m
    Old Knocklyon Road——612 m

    Crèches and schools inspected

    NameLatest inspectionDistance
    Delaford Montessori · Crèche18 Oct 2024 · report · Tusla Early Years Inspectorate321 m
    Naíonra Chnoc Liamhna · Crèche15 Apr 2025 · report · Tusla Early Years Inspectorate330 m
    Tigers Childcare · Crèche12 Jun 2025 · report · Tusla Early Years Inspectorate437 m
    Eager Beavers Montessori · Crèche9 May 2025 · report · Tusla Early Years Inspectorate484 m
    Cool Kidz Creche · Crèche26 Mar 2026 · report · Tusla Early Years Inspectorate497 m
    Tigers Childcare & Nexus Preschool · Crèche4 Mar 2026 · report · Tusla Early Years Inspectorate710 m
    Little Penguins · Crèche16 Apr 2026 · report · Tusla Early Years Inspectorate790 m
    Let's Play Pre-School · Crèche7 Jun 2024 · report · Tusla Early Years Inspectorate807 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, Housing estates, National Planning Application Database, Department of Education school list, Tusla early years register · fetched 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    Dublin housing delivery pipelineCC BY 4.012 Oct 2026, 23:02open
    Housing estatesODbL 1.0, CC BY-SA 4.0, CC BY 4.027 Sept 2026, 20:18open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Department of Education school listCC BY 4.027 Sept 2026, 23:32open
    Tusla early years registerPublic register14 Oct 2026, 23:20open
    How busy is this area Busier than most of South Dublin County Council.
    Homes approved
    Here155
    Council middle0
    Homes started
    Here82
    Council middle4
    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 17 Oct 2026, 02:05
    SourceLicenceFetchedLink
    An Coimisiún Pleanála cases (ArcGIS feed)CC BY 4.016 Oct 2026, 23:06open
    Building Control Management System (commencement notices)CC BY 4.017 Oct 2026, 01:09open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Question 5

    What's the area like?

    Figure 10

    This street block against the council

    4% of homes built before 1971 (council 18%). 98% owner-occupied (council 67%).

    Homes built before 1971
    4% · council 18%
    Homes built since 2001
    3% · council 27%
    Owner-occupied
    98% · council 67%
    Rented
    1% · council 29%
    Children under 15
    17% · council 21%
    Aged 65 and over
    29% · council 13%
    Households with 2+ cars
    66% · council 40%
    Work mainly from home
    13% · council 10%
    This small area (328 people)South Dublin

    MeasuredCSO Census 2022, Small Area Population Statistics (CC BY 4.0) · small area 267086002

    Road noise
    55–59 dB
    day–night average (EPA 2022)
    Bus
    407 m
    Knocklyon Shop Cntr · 15 · busiest stop within 500 m: 10 an hour at peak
    Radon
    1 in 20
    homes here likely high (EPA). Test it
    Nearest school
    281 m
    Scoil Colmcille Naofa, 721 pupils
    Homes sold nearby
    27
    in 3 years (Property Price Register)
    Schools, stops and the council

    Schools

    • Scoil Colmcille Naofa · primary · 721 pupils · 281 m
    • St Colmcille Senior NS · primary · 744 pupils · 281 m
    • Gaelscoil Chnoc Liamhna · primary · 233 pupils · 482 m
    • St. Colmcille's Community School · postprimary · 727 pupils · 823 m

    Stops 32

    • Knocklyon Shop Cntr · 15 · 8/hour at peak · 407 m
    • Knocklyon Shop Cntr · 15 · 6/hour at peak · 419 m
    • Green Acre Ct · 65B, F1, S6 · 9/hour at peak · 432 m
    • Knocklyon Avenue · 65B, F1, S6 · 9/hour at peak · 458 m
    • Dargle Wood · 15 · 8/hour at peak · 463 m
    • Dargle Wood · 15 · 7/hour at peak · 471 m
    • Green Acre Ct · 65B, F1, S6, UM08 · 10/hour at peak · 474 m
    • Knocklyon Avenue · 65B, F1, S6 · 10/hour at peak · 477 m

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

    • Scoil Colmcille Naofa · 281 m-2.3% pupils (721)
    • St Colmcille Senior NS · 281 m-1.7% pupils (744)
    • Gaelscoil Chnoc Liamhna · 482 m+6.4% pupils (233)
    • St. Colmcille's Community School · 822 m+0.3% pupils (727)

    Open consultations

    Council meetings 16 items

    Public land

    • South Dublin County Council · 0.1 ha · 252 m
    • Dublin City Council · 0.35 ha · 297 m
    • Dublin City Council · 0.74 ha · 323 m
    • South Dublin County Council · 0.16 ha · 374 m
    • Dublin City Council · 3.17 ha · 407 m
    • Dublin City Council · 16.58 ha · 415 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 17 Oct 2026, 02:12
    SourceLicenceFetchedLink
    Public transport stops and routes (NTA GTFS)CC BY 4.011 Oct 2026, 23:43open
    Department of Education school listCC BY 4.027 Sept 2026, 23:32open
    National Planning Application DatabaseCC BY 4.017 Oct 2026, 02:05open
    Council consultation portalsPublic17 Oct 2026, 01:36open
    Council meetings (ModernGov)Public17 Oct 2026, 02:12open
    Land Development Agency public land registerCC BY 4.011 Sept 2026, 16:43open
    cso_saps_2022CC BY 4.0—open
    National Transport AuthorityCC 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 mapsCC BY 4.0——
    Fingal County CouncilCC BY 4.0——
    Question 6

    What to ask, and who

    1. Porch (SD03B/0529) approved 2004: built as approved?
      Ask for: The grant and an opinion of compliance.
      Seller · solicitor
    2. Application 435 m away open for comments until 23 Oct 2026: comment?
      Ask for: The plans on the council's website (€20 to comment).
      Council
    3. Building work started 19 m away: for how long?
      Ask for: The planning conditions for SD22A/0450.
      Agent · council
    4. 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
    Knocklyon
    Electoral division
    Firhouse-Knocklyon
    Electoral area
    Firhouse-Bohernabreena
    Council
    South Dublin County Council
    Everything we found, as a list 8 lines
    • 2 applications on this site; latest SD03B/0529, approved 2004, built? unknown.
    • Zoned R2 (existing residential); not protected; no vacant land tax.
    • 1 site nearby could change: 1 approved scheme.
    • 1 application open for comments nearby; nearest closes 23 Oct 2026.
    • 11 homes approved nearby, not started; largest 11 at Vista Montana.
    • Green Acre Ct (bus 65B, F1) 474 m away: 10 an hour at morning peak; 66 from all stops within 500 m.
    • Noise from road traffic mapped at 55–59 dB (day-evening-night average, EPA 2022).
    • Here (2022 census): 98% owner-occupied (council 66%); 2% of homes empty (council 4%); most built 1971–1980; 58% drive to work (council 54%).
    What the terms mean 7 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.
    • 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
    SourcePublisherLicenceFetched
    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.comAn Coimisiún PleanálaCC BY 4.016 Oct 2026
    data.nbco.gov.ieNational Building Control Office (BCMS)CC BY 4.017 Oct 2026
    data.gov.ieVarious (see each layer)CC BY 4.0, CC BY-NC-ND 4.027 Sept 2026
    services-eu1.arcgis.comNational Inventory of Architectural HeritageCC BY 4.027 Sept 2026
    gis.epa.ieEnvironmental Protection AgencyCC BY 4.027 Sept 2026
    dlrcoco.citizenspace.comLocal authorities (consultation portals)Public17 Oct 2026
    www2.courts.ie—© the publisher17 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.comLocal authorities (derelict sites registers)CC BY 4.012 Oct 2026
    services.arcgis.comDublin local authorities (housing delivery pipeline)CC BY 4.012 Oct 2026
    esbnetworks.ie—© the publisher · flag only11 Sept 2026
    overpass-api.deOpenStreetMap contributors, NHDS, Kildare County CouncilODbL 1.0, CC BY-SA 4.0, CC BY 4.027 Sept 2026
    transportforireland.ieNational Transport AuthorityCC BY 4.011 Oct 2026
    lda.ieLand Development AgencyCC BY 4.011 Sept 2026
    meetings.fingal.ieLocal authorities (council meetings)Public17 Oct 2026
    services.arcgis.comDepartment of Housing (National Planning Application Database)CC BY 4.017 Oct 2026
    services-eu1.arcgis.comTailte ÉireannCC BY 4.011 Sept 2026
    services-eu1.arcgis.comCSO, Tailte Éireann, OpenStreetMap contributorsCC BY 4.04 Oct 2026
    propertypriceregister.ieProperty Services Regulatory Authority (PPR)© PSRA, PSI licence17 Oct 2026
    services.arcgis.comLocal authorities (RZLT maps)CC BY 4.011 Oct 2026
    gov.ieDepartment of EducationCC BY 4.027 Sept 2026
    gov.ieDepartment of HousingCC BY-SA 4.09 Oct 2026
    tusla.ieTusla (Early Years Inspectorate)Public register14 Oct 2026
    services.arcgis.comLocal authorities via the Department of Housing (GZT / MyPlan)CC BY 4.011 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 17 Oct 2026, 17:35 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.