Planning application
90 Park Street London W1K 6NP
Works: Extension Small domestic
Read from the description, not a valuation. How we read the register
Still open. Anyone can comment while the consultation period runs, and comments go to the council rather than to us.
Proposal
Erection of single storey rear extension at third floor level with roof terrace above enclosed by glass balustrade, to enlarge dwellinghouse (Class C3).
As published by the council, reference 26/01800/FULL
Application record
- Reference
- 26/01800/FULL
- Type
- Full Planning Permission Application
- Status
- Pending
- Received
- 19 Mar 2026
- Validated
- 13 Apr 2026
- Ward
- West End
- Postcode
- W1K 6NP
Site history
Applications at this address on the Westminster register
This site has had 2 applications since 2012: 1 approved, 0 refused.
-
12/02116/FULL Granted
90 Park Street London W1K 6NP
Excavation to create a sub-basement level to provide additional accommodation in connection with the single family dwelling.
Timeline
Dates from the published record
-
19 Mar 2026
Received by Westminster
-
13 Apr 2026
Validated
Checked as complete and ready for consideration.
-
21 Jul 2026
Added to PlanIndex
-
Decision
Awaiting decision
Decision expected by 8 June 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
RS Architects Agent, an architecture practice
13 applications on PlanIndex · across 7 councils · 90% granted
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
18 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.
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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
-
90 Park Street London W1K 6NP
Excavation to create a sub-basement level to provide additional accommodation in connection with the single family dwelling.
Granted Full applications 15 docsDomestic -
96 Park Street London W1K 6NY
87% historically approved · decision due ~23 Jun
Variation of Condition 1 of planning permission dated 25th February 2025 (RN:24/09049/FULL) for: External alterations including the erection of single-storey roof extension to enlarge the existing, albeit reconfigured, fourth floor flats with a terrace, plant within an enclosure, an area sedum roof and an area blue roof above; installation of replacement windows throughout, installation of a replacement garage door and the installation of new dry riser inlet inset within existing railing to the lightwell along the Park Street frontage (Site include 92 - 96 Park Street) namely, reconfiguring the blue/green roof and paving slab finishes, raising of a portion of the party wall to 98-100 Park Street to provide guarding to the proposed roof terrace; reduction in number of fixed roof lights and increased sizes of two remaining fixed roof lights, the opening glazed roof light providing access from the Flat 10 5th floor to the roof terrace raised by 430mm, portion of main roof lowered over the existing lift shaft to receive one of the proposed ASHP, in order to screen the ASHP and ensure adequate air flow around the unit, the location of the second ASHP is proposed on the terrace, again to ensure adequate air flow to the unit, a new metal access ladder, painted black, is proposed to provide roof access from the 4th floor flat roof adjacent to the lightwell to the main roof in order to maintain the blue/green roof and services plant, three smaller opaque glazed windows are proposed overlooking the lightwell at 5th floor level & a pair of solid timber fire doors, new handrails are proposed to the flat roof surrounding the 4th floor roof adjacent to the lightwell, At 4th floor level, three of four existing windows overlooking the lightwell to recieve treatment
Awaiting decision Full applications New dwelling Extension +2 10 docsSmall domestic -
96 Park Street London W1K 6NY
93% historically approved · decision due ~21 Sep
Amendments to planning permission dated 25 January 2013 (RN: 12/10332/FULL) for internal and external alterations at basement level to provide 1 x 2 bed flat, cycle parking and residential storage with provision of car garage at ground floor level; NAMELY amendments to basement storage and servicing areas, including reconfigured tenant storage, retention of 14 cycle spaces through space-efficient racks, insertion of a cold water/sprinkler tank, improved refuse storage layout, consolidation of cleaner/concierge facilities, removal of internal partitions to improve storage usability, and retention of existing basement windows previously unimplemented under the original consent.
Awaiting decision Amendments Windows or glazing 7 docs -
96 Park Street London W1K 6NY
87% historically approved · decision due ~2 Jun
Details of photographs of samples of glazing, elevations and roof plans; detailed drawings and a bio-diversity management plan in relation to the green roof; details of the blue roof and details of the waste water heat recovery pursuant to discharge of conditions 4,9,10 and 11 of planning permission dated 25th February 2025 (RN: 24/09049/FULL).
Awaiting decision Full applications Windows or glazing 6 docs -
104 Park Street London W1K 6NF
84% historically approved · decision due ~18 May
Display for a temporary period of six months of a non-illuminated 'to let' board attached to the railings in front of the building at street level and measuring 0.6 x 0.9m. (renewal)
Awaiting decision Advertising 5 docs -
104 Park Street London W1K 6NF
84% historically approved · decision due ~28 Jul
Display for a temporary period of six months of a non-illuminated estate agent board located on the face of the building at ground floor level and measuring 0.45m x 0.6m.
Awaiting decision Advertising 4 docs
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Amalgamation of existing lower ground and ground floor maisonette with the first floor flat to create a single dwelling and associated internal works including creation of a staircase. (Linked with 26/06270/LBC)