← Back to search

Permitted25/08753/FULLSubmitted 10 months agoRear extension

20 Hertford Street Westminster W1J 7RX

Rear extension at fourth floor, installation of new double glazed sliding doors to existing terrace; alteration to existing terrace rooflight, installation of automatic opening vent (AOV) and installation of two new rooflights on main roof.

Find on council portal

Tracking, tags and letters are part of the paid plan. See what it costs. Searching and reading any record stays free.

Map of the site

Progress

Submitted
2 Dec 2025
— completed
Validated
2 Dec 2025
— completed
Consultation
20 Mar 2026
— completed
Target date
27 Jan 2026
— completed
Decided
27 Aug 2026
— completed

Application details

Reference
25/08753/FULL
Local authority
Westminster
Postcode
W1J 7RX
Ward
WEW_22
Application type
All Other
Property type
House

Key dates

Submitted
2 Dec 2025
Validated
2 Dec 2025
Comments close
20 Mar 2026
Target decision
27 Jan 2026
Decided
27 Aug 2026

Estimated project value

£13k–£22k

Based on the 5.4m² of floor area stated in the application, at inner London rates (2026). Source: FMB / Checkatrade 2026, single-storey extension £1,800-£3,000/m².

Floor area gained: 5.42m²

Recently sold nearby

Nothing on this postcode has changed hands in the last two years. The sales below are for pricing rather than a lead.

Contains HM Land Registry data © Crown copyright and database right 2024. This data is licensed under the Open Government Licence v3.0. Sales are matched by postcode, not by property, so a sale listed here may be a neighbouring address. England and Wales only.

Planning constraints

No designations recorded at this location. This is not a formal search — always confirm with the local authority before relying on it.

Designations from planning.data.gov.uk, Open Government Licence v3.0. Indicative only — not a formal local authority search.

Recorded changes

  • 5 Sept 2026: Approved

Nearby applications