Planning application
97 Mount Street London W1K 2TD
Works: Loft or dormer
Decided. The decision notice on the council portal carries the outcome in full, including any conditions.
Proposal
Amendments to planning permission dated 14th October 2024 (RN 24/01954/FULL) for, "Installation of a new box rooflight (to provide access), creation of a terrace with glass balustrade and replacement of plant with new enclosure all at main roof level"; (Site includes 97 and 99 Mount Street) NAMELY, installation of railings with integrated gate at roof level to prevent access along the parapet party wall.
As published by the council, reference 26/04021/NMA
Application record
- Reference
- 26/04021/NMA
- Category
- Amendments
- Status
- Decided
- Received
- 18 Jun 2026
- Validated
- 18 Jun 2026
- Decided
- 28 Jul 2026
- Postcode
- W1K 2TD
Site history
Applications at this address on the Westminster register
This site has had 11 applications since 2025: 7 approved, 0 refused.
-
26/04016/LBC Decided
97 Mount Street London W1K 2TD
Installation of railings at roof level with an integrated gate.
-
26/00859/FULL Awaiting decision
97 Mount Street London W1K 2TD
Replacement of vault doors at lower-ground floor level and installation of roof breather vents beneath roof terrace decking (Linked to 26/00860/LBC)
-
26/00860/LBC Awaiting decision
97 Mount Street London W1K 2TD
Replacement of vault doors at lower-ground floor level and installation of roof breather vents beneath roof terrace decking. (Linked to 26/00859/FULL)
-
26/00136/ADFULL Granted
97 Mount Street London W1K 2TD
Details of new doors pursuant to condition 7 of listed building consent dated 14th October 2024 (RN: 24/01955/LBC).
-
25/09041/ADFULL Granted
97 Mount Street London W1K 2TD
Details of roof terrace railings pursuant to condition 6 of planning permission dated 14th October 2024 (RN: 24/01954/FULL)
-
25/09042/FULL Granted
97 Mount Street London W1K 2TD
Installation of dry riser inlet within existing grille.
-
25/08980/ADLBC Granted
97 Mount Street London W1K 2TD
Details of design of outlet valve cabinets pursuant to condition 3 of listed building consent dated 6 November 2025 (RN: 25/03472/LBC).
-
25/08826/ADLBC Granted
97 Mount Street London W1K 2TD
Details of roof terrace railings pursuant to condition 11 of listed building consent dated 14th October 2024 (RN: 24/01955/LBC)
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25/05402/ADLBC Granted
97 Mount Street London W1K 2TD
Detailed drawings of the new secondary glazing, detailed drawings of the new doors, detailed method statement, including photographs, showing how each retained door will be upgraded for fire protection, including a plan to show where each retained door is located and detailed drawings of the roof terrace railings pursuant to conditions 6, 7, 8 and 11 of listed building consent dated 14th October 2024 (RN:24/01955/LBC)
-
25/03472/LBC Granted
97 Mount Street London W1K 2TD
Installation of dry riser system and associated works.
Timeline
Dates from the published record
-
18 Jun 2026
Received by Westminster
-
21 Jul 2026
Added to PlanIndex
-
28 Jul 2026
Decision issued
-
9 Aug 2026
Status changed to Decided
Previously Pending.
After the decision
Westminster has decided this application; the outcome above is the register's own wording and the decision notice on the council portal carries the detail. More in our guide to what happens after a planning decision.
About amendment applications
An amendment application makes limited changes to a permission that already exists; anything beyond modest adjustment needs a fresh application. More in our guide to planning application types.
Nearby applications
Within 0.3 miles
-
97 Mount Street London W1K 2TD
90% historically approved · decision due ~13 Aug
Installation of railings at roof level with an integrated gate.
Decided Heritage and listed buildings -
97 Mount Street London W1K 2TD
87% historically approved · decision due ~9 Apr
Replacement of vault doors at lower-ground floor level and installation of roof breather vents beneath roof terrace decking (Linked to 26/00860/LBC)
Awaiting decision Full applications 12 docs -
97 Mount Street London W1K 2TD
90% historically approved · decision due ~9 Apr
Replacement of vault doors at lower-ground floor level and installation of roof breather vents beneath roof terrace decking. (Linked to 26/00859/FULL)
Awaiting decision Heritage and listed buildings 1 doc -
97 Mount Street London W1K 2TD
Details of roof terrace railings pursuant to condition 6 of planning permission dated 14th October 2024 (RN: 24/01954/FULL)
Granted Full applications 5 docs -
97 Mount Street London W1K 2TD
Details of new doors pursuant to condition 7 of listed building consent dated 14th October 2024 (RN: 24/01955/LBC).
Granted Conditions 4 docs -
97 Mount Street London W1K 2TD
Details of design of outlet valve cabinets pursuant to condition 3 of listed building consent dated 6 November 2025 (RN: 25/03472/LBC).
Granted Conditions 5 docs
Other amendment applications
In Westminster
-
26/06232/NMA Awaiting decision
37 Trevor Place London SW7 1LE
Amendments to planning permission dated 17th July 2026 (RN 26/03030/FULL) for the Alterations including enlargement of louvres and installation of new plant in basement; landscaping of roof terrace; second floor windows replaced with door sets; partial demolition at ground and first floor levels to create new lightwell and landscaped courtyard. NAMELY, addition of a free-standing sauna to the second-floor roof terrace.
-
26/06256/NMA Awaiting decision
Queens Court Queensway London W2 4QN
Amendments to planning permission dated 21st May 2026 (RN:25/05013/FULL) for Variation of conditions 1, 3, 8, 9 and 17 of planning permission dated 11th May 2022 (RN 18/09765/FULL) for the Change of use of rear part of Queensway Market to Retail, Financial and Professional services, Office and Restaurant (within Class E) use and 5 residential units facing Princes Court, reconfiguration of retail units along Queensway including introduction of Retail uses at Nos.23 and 33 (current entrances to Queensway Market) and use of Nos.25 and 41-43 Queensway as Restaurant uses, installation of new shopfronts to Nos.23 to 43 Queensway 23-43, erection of infill extension to rear at ground floor level, erection of two new pavilion structures for Retail use and associated new hard and soft landscaping on land between Queens Court and Princes Court, installation of green roofs, rooflights and mechanical plant within enclosures to first floor level roofs between projecting rear wings of Queens Court installation of kitchen extract ducts to rear elevations, and associated cycle parking, waste storage, plant and other ancillary alterations ('Application 2'). Namely, to vary the hours of operation for the refrigeration plant controlled by condition 6.
-
26/06251/NMA Awaiting decision
19 Cumberland Street London SW1V 4LS
Amendments to planning permission dated 20th March 2026 (RN:25/08960/FULL) for Lower ground floor rear infill extension with terrace above, replacement of rear first floor conservatory, new roof level rear single dormer with access to third floor roof terrace, alterations to windows and external refurbishment, namely the change of conservatory gable roof to a flat GRP roof.
-
26/06201/NMA Awaiting decision
Almack House 28 King Street St James's London SW1Y 6QW
Amendments to planning permission dated 16th April 2026 (RN:26/01487/FULL) for Installation of a mechanical plant at lower ground floor and installation of two grilles to two lower ground floor windows, namely change to approved grille.
-
26/06212/NMA Awaiting decision
10 - 11 Lancaster Gate London W2 3LH
Amendment to Condition 12 (Whole Life Carbon) of planning permission dated 19th April 2024 (RN 23/04044/FULL) for Change of use from hotel to residential use (Class C3) with associated internal alterations to create 11 new units and external alterations comprising reconfiguration and recladding of the rear extension and restoration of the existing building. Namely to include additional requirement to evidence and justify where benchmarks cannot be achieved, consider mitigation measures and if none, evidence that all mitigation measures have been exhausted. (Linked with RN 26/06213/ADFULL)