Observation pack · Dún Laoghaire-Rathdown County Council

13, Castle Park, Monkstown, Blackrock, Dublin

new, single storey, extension to front and side of existing house

Observations close 21 Oct 2026 16 days left

5 weeks from receipt (received 16 Sept 2026) · s.34 Planning and Development Act 2000 · art. 29 Regulations 2001 · fee €20 · council decision due 10 Nov 2026

The application

Reference: D26B/0503 · full record
Authority: Dún Laoghaire-Rathdown County Council
Type: Permission
Status: Referral
Applicant: not published by the national dataset — see the council register
Units: —
Floor area: —
Site area: 331 m²
Received: 16 Sept 2026
We first saw it: 29 Sept 2026, 23:03
Decision due: 10 Nov 2026
Decision: not yet decided

The national dataset truncates descriptions (80 characters for DLR, 70 for Fingal) and omits the applicant. The full description and the drawings are on the council register linked in step 1.

How to submit an observation

Read the file on the council register.Drawings, planning statement and site notices are at https://planning.agileapplications.ie/dunlaoghaire/application-details/?ref=D26B/0503.
Write your observation.Quote D26B/0503 at the top, give your name and the address the authority should reply to, and confine it to planning matters — zoning objective, height, overlooking, traffic, drainage, heritage. What you say here is what you can later appeal on.
Pay the €20 fee.Every submission needs it; without it the observation is invalid and is returned. Dún Laoghaire-Rathdown County Council takes it online with the submission or at the counter.
Submit before 21 Oct 2026.Online through the register above, or in writing to the Planning Department, Dún Laoghaire-Rathdown County Council. The test is the date the authority receives it, not the date you post it.
Keep the acknowledgement.The council's receipt is your proof of a valid observation — see below.

Statutory basis. Section 34(1) of the Planning and Development Act 2000 (as amended) requires a planning authority to consider any submission or observation made to it in accordance with the Regulations. Article 29 of the Planning and Development Regulations 2001 (as amended) sets the window: a submission or observation must be received by the authority within five weeks beginning on the date of receipt of the application, and must be accompanied by the prescribed fee of €20. A submission received after the window, or without the fee, is invalid and the authority must return it.

After you submit: keep the acknowledgement. Under the 2024 Act it secures your right to appeal — only the applicant and a person who made a valid observation may bring the council's decision to An Coimisiún Pleanála, within four weeks of the decision. Making a valid observation is also what buys a right of appeal: under s.37(1) of the 2000 Act, only the applicant and a person who made a valid submission or observation to the planning authority may appeal the decision to An Coimisiún Pleanála (within four weeks of the decision). Missing the five-week window closes both doors.

What the site is zoned

Code	Objective	Plan	In force
R2 Existing residential	Objective A: A To provide residential development and improve residential amenity while protecting the existing residential amenities	DR-001:DP:county-development-plan-2022-2028	1 Apr 2022 → 1 Apr 2028

An application that accords with the zoning objective is hard to resist on principle; one that does not may be a material contravention, which the council can only grant by the s.34(6) procedure with its own notice and window.

Source: DLR DR-001:DP:county-development-plan-2022-2028 · fetched 11 Sept 2026, 15:17

Source	Licence	Fetched	Link
DLR DR-001:DP:county-development-plan-2022-2028	—	11 Sept 2026, 15:17	open

Designations on or near the site

Radon risk area × 1
About 1 in 20 homes in this area is likely to have high radon levels
Record of Protected Structures × 1
Monkstown Castle House
Recorded monument × 1
R149421

Nearby precedents within 500 m, last 5 years

Decisions

Reference	Decision	Decided	Units	Distance	Description
D26A/0575/WEB	Grant permission	17 Sept 2026	—	454 m	Creation of vehicular access and driveway to the front of the property.
REF11026	S5 dec exempt	14 Sept 2026	—	443 m	Whether the use of Centenary House, 35 York Road, Dun Laoghaire, Co. Dublin as a
D26A/0551/WEB	Refuse permission	10 Sept 2026	—	364 m	Amendments to previously permitted development Reg. Ref. D25A/0284/WEB (ACP-322
D26A/0637/WEB	Declare application invalid	27 Aug 2026	—	96 m	The development will consist of the partial demolition of the existing side gar
D26A/0613/WEB	Declare application invalid	19 Aug 2026	—	96 m	The development will consist of the partial demolition of the existing side gar
D26A/0477/WEB	Grant permission	18 Aug 2026	—	444 m	Permission sought for a new vehicular entrance gateway to the front to provide 1
D26A/0475/WEB	Grant permission	14 Aug 2026	—	492 m	The development will consist of a single storey rear kitchen extension, conversi
D26A/0450/WEB	Grant permission	4 Aug 2026	—	359 m	The proposed development will consist of: Modifications to the permitted develo

Appeals

ACP case	Type	Outcome	Decided	Distance
501810	Planning Appeal	pending	31 Jul 2026	364 m
501458	Planning Appeal	pending	2 Jun 2026	346 m
501278	Planning Appeal	pending	1 May 2026	80 m
322640	Planning Appeal	Refused	25 Sept 2025	346 m
322290	Planning Appeal	Granted with conditions	1 Aug 2025	362 m
322291	Planning Appeal	Refused	1 Aug 2025	346 m
322865	Planning Appeal	open	24 Jun 2025	364 m
322850	Planning Appeal	Invalid	20 Jun 2025	364 m

If neighbours here have appealed before and lost, the inspector's report on that case is the single most useful thing to read.

What has happened on this file

16 Sept 2026 New application · observations close 21 Oct 2026

Generated from the Planning Register store; nothing was fetched live for this page. Source: national planning dataset, fetched 29 Sept 2026, 23:03. Not legal advice — confirm the deadline with Dún Laoghaire-Rathdown County Council before relying on it.