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Planning application

20 Thurleigh Avenue SW12 8AW

Granted Wandsworth 2025/4573 Variation of Condition

Works: Extension Loft or dormer Windows or glazing

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

Variation of condition 2 pursuant to planning permission dated 22/11/2023 ref 2023/4388 (Alterations including erection of a hip to gable extension to main roof with dormer extension to rear roof. Erection of a ground floor side/rear extension and first floor side extension with roof extension over. Insertion of windows to ground floor front elevation in connection with use of garage as additional habitable accommodation.) to allow the addition of sliding doors to the rear elevation, removal of ground floor rear extension and replacement of conservatory like for like, retention of garage door, installation of side first floor window and change to the dormer from cladding to wall-hung concrete tiles.

As published by the council, reference 2025/4573

Application record

Reference
2025/4573
Type
Variation of Condition
Status
Granted As published: FINAL DECISION
Decision
Granted As published: Approve with Conditions
Received
18 Dec 2025
Validated
13 Jan 2026
Decided
12 Feb 2026
Ward
Balham
Decision by
Delegated Standard
Postcode
SW12 8AW

Timeline

Dates from the published record

  1. 18 Dec 2025

    Received by Wandsworth

  2. 13 Jan 2026

    Validated

    Checked as complete and ready for consideration.

  3. 12 Feb 2026

    Decision issued: Approve with Conditions

  4. 10 Aug 2026

    Added to PlanIndex

Documents

Plans, drawings, consultee responses and the officer's report

7 documents on file for this application

A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.

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Open the documents

What this grant of permission means

Wandsworth granted permission on 12 February 2026, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. More in our guide to what happens after a planning decision.

About amendment applications

An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.

Nearby applications

Within 0.3 miles

  • 14 Nightingale Lane SW12 8TB

    2022/1951 Submitted 11 May 2022 50 yards away

    Alterations including erection of hip-to-gable rear roof extension with dormers to side roofslopes; Erection of single storey outbuilding in rear garden to be used as granny annex; Removal of side vehicle access gate to be replaced with timber fencing and removal of dividing wall in rear garden.

    Granted Householder Extension Loft or dormer 26 docs
    Small domestic
  • 14 Nightingale Lane SW12 8TB

    2021/3973 Submitted 24 Aug 2021 50 yards away

    Alterations including erection of hip-to-gable rear roof extension with dormers to side roofslopes; Erection of a single storey outbuilding to rear garden.

    Withdrawn Householder Extension Loft or dormer 22 docs
    Small domestic
  • 3 Thurleigh Avenue SW12 8AN

    2026/2759 Submitted 12 Aug 2026 50 yards away

    88% historically approved · decision due ~7 Oct

    Alerations including erection of dormer roof extension to main rear roof.

    Awaiting decision Extension Loft or dormer
  • 3 Thurleigh Avenue SW12 8AN

    2026/3213 Submitted 10 Sep 2026 50 yards away

    88% historically approved · decision due ~3 Nov

    Alterations including erection of a first floor rear extension; Demolition of existing rear extension and erection of 2x two storey rear/side extensions at lower ground and ground floors.

    Awaiting decision Extension Demolition
  • 5 Holmside Road SW12 8RJ

    2021/3197 Submitted 6 Jul 2021 50 yards away

    Alterations including roof extension of existing outbuilding ancillary to the main dwelling house.

    Granted Householder Extension 7 docs
    Small domestic
  • Flats 1-3 14 Old Park Avenue SW12 8RH

    2021/3407 Submitted 19 Jul 2021 100 yards away

    Installation of replacement timber windows to front and side and UPVC windows to rear elevation

    Granted Full applications Windows or glazing 12 docs

In Wandsworth

  • 2026/1508 Granted

    30-32 St Johns Road SW11 1PW

    Variation of condition (d) opening hours of planning permission dated 07/02/1980 ref 79/N/2490 (Use of shop and basement as restaurant, store and ancillary staff facilities.) to allow 24 hour operation of the restaurant.

    Received 21 Apr, published by the council 25 Jul 2026 Amendments
  • 2026/3246 Awaiting decision

    70 Thurleigh Road SW12 8UD

    Variation of condition 4 (details and samples of materials) pursuant to planning permission dated 13/08/2026 ref 2024/3766 (Demolition of the existing two storey dwelling house and the erection of a replacement three storey (plus basement with front and rear light wells) detached dwelling house. Landscaping to front and rear gardens, including works to trees and erection of replacement front boundary.) so as to allow commence above ground works.

    Received 10 Sep, published by the council 21 Sep 2026 Amendments
  • 2026/3243 Awaiting decision

    Battersea Power Station development site SW8 5BN

    Variation of conditions 3 (Reserved Matters), 5 (Architectural Design Code), 6 (Placemaking Code), 7 (Parameter Plans), 8 (Land Uses), 10 (Distribution of Land Uses), 11 (Development Zone Land Uses), 13 (Maximum Residential units), 14 (Residential Mix), 18 (Phasing Plan), 20 (Car Parking), 21 (Residential Car Parking Spaces) and 61 (Approved Drawings) to outline planning permission dated 25th September 2020 (ref. 2020/0579) for: "the restoration, extension, alterations and conversion of the Power Station building to provide retail, residential flats, business, cultural, hotel and conference facilities, event space and incidental accommodation; the demolition of other buildings and development of the land surrounding the Power Station and adjacent/nearby sites to provide retail, restaurants bars and cafes, offices, hotel, residential, community and cultural space, assembly and leisure space, serviced apartments, an energy centre and basement plant; parking for cars, coaches, motorcycles and bicycles; new access and internal road system and servicing; 'off-site' highway works; works to the jetty and riverwall to facilitate river transport and fuel delivery; provision of open space and landscaping." The planning application is accompanied by an Environmental Statement Addendum

    Received 10 Sep, published by the council 21 Sep 2026 Amendments
  • 2026/3239 Withdrawn

    119 Ravenslea Road SW12 8RT

    Non-material amendment to planning permission dated 03/06/2025 ref 2024/2907 (Alterations including erection of an extension above two-storey rear addition with roof terrace and 1.7m high obscure glazed screen. Excavation to enlarge existing basement and erection of a single-storey rear/side extension and first floor oriel window rear extension. The proposed works are in connection with the creation of a new one bedroom flat within the second floor. It is also proposed to re-configure the existing flats into a three bedroom flat along the proposed basement and ground floor and a two bedroom flat along the first floor.) to allow the omission of the basement level; Omission of the glazed roof and replace with two rooflights to the ground floor rear of Flat A; Minor internal amendments to the upper floors; resulting tof the second floor flat (Flat C reduced by 3.0sqm; entrance door to the second floor flat (Flat C) relocated to the top of the communal staircase and the flank wall of Bedroom 3 (Flat A) projecting further by1060mm into the courtyard.

    Received 9 Sep, published by the council 21 Sep 2026 Amendments
  • 2026/3236 Awaiting decision

    Main Building (forming part of Phase 6C) Springfield Hospital 61 Glenburnie Road SW17 7DJ

    Variation of condition 2 (in accordance with approved drawings) pursuant to planning permission dated 07/08/2024 ref. 2021/4679 (Alterations, restoration and repair works in connection with the proposed conversion of Fir Tower, Oak Tower and Teak Tower within part of the Main Building to residential use (Class C3) to provide 32 flats, together with associated landscaping and servicing works.) to allow an amendment to the residential mix with a reduction of 2 x 2-bedroom apartments and an increase of 2 x 3-bedroom apartments through internal alterations, with an amendment to the associated S106 legal agreement to amend the affordable housing provision.

    Received 9 Sep, published by the council 10 Sep 2026 Amendments