21 Harpenden Road London SE27 0AG Data via plota.co.uk
Proposal
Erection of a ground floor side and rear extension and removal of a window with the addition of a door to the rear. Data via plota.co.uk
Application progress
Approved on 5 Oct 2026 · Delegated Decision · Last checked 6 Oct 2026
Documents 10
Decision & officer reports 2
Statements & assessments 2
Plans & drawings 2
Application forms 1
Site constraints 6
Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) 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.
Sales history 1
Last sold for £194,000 in October 2007. Flat or maisonette, freehold.
Sale prices from HM Land Registry's price paid record, matched to this application by its address.
Building
From the energy performance certificate lodged in July 2022, the latest held for this property. The building may have changed since. View the certificate
Every application in Lambeth - and every UK council - as a live feed, an API, or a bulk CSV export.
Other new applications on this street
Nearby new applications
Lancaster Court Lancaster Avenue London SE27 9HU
FRONT CAR PARK: T1 London plane (ht.12m) CROWN LIFT to provide 3.5m clearance ab...
Garages Adjacent To 78 Kingsmead Road And Rear Of 64 Palace Road London SW2
Approval of details pursuant to conditions 7 (cycle parking), 8 (waste and recyc...
80 Palace Road London SW2 3JY
Replacement of existing timber windows with new double glazed uPVC windows on al...
22 Birkbeck Place London SE21 8JU
Replacement of the existing windows and doors on the property with new uPVC fram...
34 Birkbeck Place London SE21 8JU
Replacement of the existing windows and doors at the front and rear for double-g...
6 Lansdowne Hill London SE27 0AR
Application for deed of variation to S106 agreement pursuant to planning permiss...
Important details
How this decision compares
Decided in 56 days from validation, about the council's usual 56 days. Approved, as 82% 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.
7 neighbours consulted · Last counted 6 Oct 2026
Consultation & key dates
- Comments by
- 30 Sept 2026
- Statutory expiry
- 5 Oct 2026
- 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.
Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.
Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use
Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.
Track this application
21 Harpenden Road London SE27 0AG
Tracking this application
Not there after a minute? Check your junk folder. It's from alerts@plota.co.uk.
Go to your dashboard →Sign in to view contact details
Applicant and case-officer names are hidden from public view for privacy. Create a free Plota account - or sign back in - and we'll show them, plus you get a dashboard for alerts and tracked applications.
