Observation pack · South Dublin County Council

65, Knockaire, Knocklyon, Dublin 16, D16 FW95

Conversion of existing attic space comprising of modification of existing roof structure, raising of existing gable c/w window, new access stairs, 3no. roof windows to the front and flat roof dormer to the rear.

Observations close 23 Oct 2026 9 days left

5 weeks from receipt (received 18 Sept 2026) · s.34 Planning and Development Act 2000 · art. 29 Regulations 2001 · fee €20 · council decision due 12 Nov 2026

The application

Reference: SD26B/0419W · full record
Authority: South Dublin County Council
Type: Permission
Status: Referral
Applicant: not published by the national dataset — see the council register
Units: —
Floor area: 41 m²
Site area: 291 m²
Received: 18 Sept 2026
We first saw it: 29 Sept 2026, 23:03
Decision due: 12 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/southdublin/application-details/71049.
Write your observation.Quote SD26B/0419W 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. South Dublin County Council takes it online with the submission or at the counter.
Submit before 23 Oct 2026.Online through the register above, or in writing to the Planning Department, South Dublin 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	RES: To protect and/or improve residential amenity	SD-001:DP:south-dublin-county-development-plan-2022-2028	8 Mar 2022 → 8 Mar 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: SDCC SD-001:DP:south-dublin-county-development-plan-2022-2028 · fetched 11 Sept 2026, 23:18

Source	Licence	Fetched	Link
SDCC SD-001:DP:south-dublin-county-development-plan-2022-2028	—	11 Sept 2026, 23:18	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

Nearby precedents within 500 m, last 5 years

Decisions

Reference	Decision	Decided	Units	Distance	Description
ED26/0098	Declared exempt	2 Oct 2026	—	367 m	Rear extension c22m, front door to be brought forward to existing porch door. Building up right-hand side (if facing) of garage in similar brick finish to existing house to narrow the garage door opening.
SD26B/0372W	Request additional information	30 Sept 2026	—	395 m	Retention for a flat roof over the existing front porch extension; revised ground floor front elevation fenestration; revised first floor side elevation fenestration.
SD26A/0182W	Refuse permission	17 Sept 2026	5	289 m	Construction of 5 no. 2-storey 4-bed detached dwellings; New internal access road and widening of the existing vehicular access from The Rookery; New boundary and entrance gates to Mount Michael House; Car parking, bin stores, landscaped communal open space and boundary treatments; All associated site works and services; The lands are adjacent to Mount Michael House, a Protected Structure.
SD26B/0344	Grant permission	9 Sept 2026	—	481 m	Demolition of portions of the existing rear and side external walls at ground floor level and the rear wall of the first floor; Demolition of the existing garage roof and the existing rear utility room, and the construction of (a) A single storey extension to the rear and side of the existing dwelling; (b) The partial conversion of the existing garage to habitable accommodation; (c) A first floor extension to the rear of dwelling, including the extension of the existing roof over the proposed first floor extension; (d) The widening of the existing vehicular entrance; and (e) Associated external works, including a new front entrance, entrance steps, planter, landscaping and all ancillary site development works.
ED26/0081	Declared exempt	7 Sept 2026	—	207 m	Replacing one car park space with one bike rack for bicycles to be parked for visitors to the Iona Centre. Improving accessibility and encouraging cyclists to come to the centre.
SD26B/0309W	Grant permission	17 Aug 2026	—	292 m	Construction of a 32sq.m ground floor flat roof extension to the rear, providing a new utility room, extended kitchen and dining room with no.1 new rooflight; Attic conversion to the rear extending the property to two storeys to include two additional bedrooms, office space, shower room and en-suite; Two roof lights to the north facing front elevation; External insulation with brick finish to the front, side and rear facades; Ancillary site works as required to facilitate construction works.
SD26B/0225W	Grant permission for retention	6 Jul 2026	—	416 m	The development consists of re-location and enlargement of ground floor window to eastern side elevation of dwelling-house.
SD21B/0201/EP	Refuse ext. of duration of permission	2 Jun 2026	—	177 m	Construction of a two storey extension at the side and a single storey extension to the rear of existing semi-detached house; canopy at the front of the house above the main entrance and continuing over a new single storey bay window; 3 no. west facing roof lights to the rear of the house; 3 no. new west-facing roof-lights to the single storey extension to the rear of the house; 3 no. windows to the new end wall and gable; connection into existing public mains; internal reconfiguration; all with a total floor area of approx.. 49sq.m and associated site works.

Appeals

ACP case	Type	Outcome	Decided	Distance
500579	Planning Appeal	Granted	2 Jun 2026	411 m
322307	Planning Appeal	Granted with conditions	6 Aug 2025	466 m
317724	Planning Appeal	Refused	21 Oct 2024	416 m
315182	Planning Appeal	Granted with conditions	12 Oct 2023	195 m
314746	Planning Appeal	pending	3 Oct 2022	408 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

18 Sept 2026 New application · observations close 23 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 South Dublin County Council before relying on it.