143 Downton Avenue London SW2 3TX Data via plota.co.uk
Proposal
Certificate of Lawful Development (Proposed) with respect to the erection of a hip to gable roof extension together with the erection of a rear dormer with and installation of 3x rooflights to the front roofslope. Data via plota.co.uk
Application progress
Approved on 18 Aug 2026 · Delegated Decision · Last checked 19 Aug 2026
Documents 7
Decision & officer reports 1
Plans & drawings 5
Other documents 1
Site constraints 6
Checked on 11 September 2026. Historic England, the Environment Agency, Natural England and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.
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Important details
- Council
- Lambeth
- Application type
- Certificate of Lawful Use proposed
- Postcode
- SW2 3TX
- Received
- 3 Jul 2026
- Validated
- 3 Jul 2026
- Ward
- Streatham Hill East
- Case officer
- Show
- Decision
- Grant Permission
- Decision date
- 18 Aug 2026
- Decision level
- Delegated Decision
- Applicant
- Show
- Agent
- A.S Construction & Structural Engineering
How this decision compares
Decided in 46 days from validation, 10 days faster than Lambeth's median of 56 for extensions. Approved, as 80% of extensions here are.
Plota live figures for extensions decided by Lambeth in the last twelve months, from validation. Lambeth decision record →
Public comments
No public comments yet.
Last counted 19 Aug 2026
Consultation & key dates
- Env. assessment
- No
Historical activity at this location
25 nearby applications on record - archival context, not part of the live application.
Nearby activity
Lambeth ranks #164 out of 296 councils for householder decision speed. 47% of applications have the time limit extended, above the 41% national average. Lambeth is also one of the strictest councils - it refuses more householder applications than almost any other, with only 81% approved vs 90% nationally.
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143 Downton Avenue London SW2 3TX
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