Planning application
15 Blackett Street SW15 1QG
Works: Extension Loft or dormer Windows or glazing Small domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Alterations including the erection of a single-storey ground floor rear/side extension and a full width mansard roof extension to the main rear roof slope with French doors and safety balustrade
As published by the council, reference 2026/0321
Application record
- Reference
- 2026/0321
- Type
- Householder
- Status
- Granted As published: FINAL DECISION
- Decision
- Granted As published: Approve with Conditions
- Received
- 23 Jan 2026
- Validated
- 3 Feb 2026
- Decided
- 19 Mar 2026
- Ward
- Thamesfield
- Decision by
- Delegated Standard
- Postcode
- SW15 1QG
Site history
Applications at this address on the Wandsworth register
This site has had 2 applications since 2026: 2 approved, 0 refused.
-
2026/0322 Granted
15 Blackett Street SW15 1QG
Erection of a dormer extension to main rear roof slope and extension above two-storey rear addition.
Timeline
Dates from the published record
-
23 Jan 2026
Received by Wandsworth
-
3 Feb 2026
Validated
Checked as complete and ready for consideration.
-
19 Mar 2026
Decision issued: Approve with Conditions
-
10 Aug 2026
Added to PlanIndex
Documents
Plans, drawings, consultee responses and the officer's report
10 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.
Watch members (£5 a month) open the document list from here.
Open the documentsWhat this grant of permission means
Wandsworth granted permission on 19 March 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 householder applications
Householder applications cover work to an existing house and its garden, such as extensions, lofts and outbuildings, and cannot create a separate dwelling or change what the building is used for. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
15 Blackett Street SW15 1QG
Erection of a dormer extension to main rear roof slope and extension above two-storey rear addition.
Granted Lawful development Extension Loft or dormer 9 docs -
5 Blackett Street SW15 1QG
Alterations including erection of dormer roof extension to main rear roof and extension above two-storey back addition.
Granted Householder Extension Loft or dormer 10 docsDomestic -
22 A Hotham Road SW15 1QB
Erection of a roof extension to main rear roof and above part of rear two-storey addition.
Granted Full applications Extension 9 docs -
26 A Blackett Street SW15 1QG
Alterations including erection of a mansard roof extension the main roof with french doors and safety balustrade and erection of extension above part of two-storey rear addition.
Refused Full applications Extension Loft or dormer +1 8 docs -
11 A Borneo Street SW15 1QQ
Alterations including mansard extension to main rear roof slope with French doors and safety railing, raising the ridge by 150mm and extension above rear addition forming a roof terrace with 1.7m obscure glazed balustrade.
Granted Full applications Extension Loft or dormer +1 7 docs -
12 Hotham Road SW15 1QB
87% historically approved · decision due ~25 May
LOCATION: 12 Hotham Road, SW15 1QB PROPOSAL: Front Garden: T1 Lime - Crown reduce by up to 1.5m.
Awaiting decision Trees
Other householder applications
In Wandsworth
-
2025/3832 Refused
9 Frensham Drive SW15 3EB
Alterations including erection of mansard roof extension to main rear roof including raising the ridge by 200mm and erection of single-storey rear extension. Formation of roof terrace at first floor level with 1.7m high screen surround.
-
2026/3241 Withdrawn
2 Brightwell Crescent SW17 9AE
Removal of existing fence andf stub trunks of trees and the erection of a new fence with new landscaping.
-
2026/0948 Granted
40 Wakehurst Road SW11 6BY
Excavation to create an enlarge basement including formation of front and rear lightwells with grille over front lightwell.
-
2026/0923 Granted
42 A Bickersteth Road SW17 9SQ
Alterations including erection of mansard roof extension to main rear roof (with French doors and safety railings) and extension above part of two-storey back addition; Formation of roof terrace above two-storey back addition with 1.7m high screen surround. Installation of an external spiral staircase from first floor level to ground floor level.
-
2026/3222 Withdrawn
21 Gaskarth Road SW12 9NN
Erection of an extension to the main rear roof to provide access to a proposed roof terrace with a 1.7m high screen surround above part of the three-storey back addition.