Planning application
1B Chester Row London SW1W 9JF
Works: Extension
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
New basement extension (under the rear half of the building) to enlarge the existing basement (beneath the front half of the building), including creation of a new lightwell along the rear of the building.
As published by the council, reference 26/04485/FULL
Application record
- Reference
- 26/04485/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 6 Jul 2026
- Validated
- 6 Jul 2026
- Ward
- Knightsbridge & Belgravia
- Postcode
- SW1W 9JF
Site history
Applications at this address on the Westminster register
This site has had 4 applications since 2025: 1 approved, 1 refused.
-
25/08340/ADFULL Awaiting decision
1B Chester Row London SW1W 9JF
Detailed drawings of new rear windows pursuant to condition 5 of planning permission dated 24th September 2025 (RN:25/05281).
-
25/07487/ADFULL Refused
1B Chester Row London SW1W 9JF
Detailed drawings of new rear windows pursuant to condition 5 of planning permission dated 24th September 2025 (RN: 25/05281).
-
25/05281/FULL Granted
1B Chester Row London SW1W 9JF
Extension at rear roof level, relocation of existing plant enclosure, simplification of roofscape including new roof maintenance access hatch.
Timeline
Dates from the published record
-
6 Jul 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 31 August 2026, 8 weeks from validation under the statutory target for most applications. Extensions of time are common and are agreed case by case.
Westminster took a median of 66 days over the applications it decided in the last year.
Who's behind it
Company information only, from the register and Companies House
AD Heritage Planning Agent, a planning consultancy
13 applications on PlanIndex · across 3 councils
Trade members see everything this firm has filed, how it was decided, and get an email the day it files again.
See their track recordDocuments
Plans, drawings, consultee responses and the officer's report
31 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 happens while it is decided
This application is with Westminster for determination, against a statutory target of eight weeks. Over the last year Westminster decided full applications in a median of 91 days. More in our guide to how long planning decisions take.
About full applications
A full application seeks permission for a complete, detailed proposal in one go, with siting, design, access and landscaping all fixed at this stage. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
1B Chester Row London SW1W 9JF
Extension at rear roof level, relocation of existing plant enclosure, simplification of roofscape including new roof maintenance access hatch.
Granted Full applications Extension Roofing 27 docs -
1 Chester Row London SW1W 9JF
Installation of scaffold fixings, removal and replacement of render and structural strengthening to cracks in underlying brickwork to front elevation.
Granted Heritage and listed buildings 15 docs -
First Floor Flat 75 - 77 Elizabeth Street London SW1W 9PJ
Installation of replacement sashes (double glazed) within the existing box frames to the front and rear at first floor level and associated works.
Granted Full applications Windows or glazing 15 docs -
First Floor Flat 75 - 77 Elizabeth Street London SW1W 9PJ
Installation of replacement sashes (double glazed) within the existing box frames to the front and rear at first floor level and associated works. (Linked with 25/07677/FULL)
Granted Heritage and listed buildings Windows or glazing 10 docs -
83 Elizabeth Street London SW1W 9PG
Replacement of existing doors on the rear elevation with timber-framed door to provide access to a small balcony; new staircase; replacement of existing window in the ground floor closet wing with new sash window; and raising of garden party-wall with planted trellis.
Granted Heritage and listed buildings Windows or glazing 13 docs -
83 Elizabeth Street London SW1W 9PG
Replacement of existing doors on the rear elevation with timber-framed door to provide access to a small balcony; new staircase; replacement of existing window in the ground floor closet wing with new sash window; and raising of garden party-wall with planted trellis.
Granted Full applications Windows or glazing 19 docs
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