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Planning application

9 Mostyn Gardens, London, NW10 5QU

Refused Brent 25/2344 Certificate of Lawfulness - Proposed

Works: Extension Loft or dormer Domestic

Read from the description, not a valuation. How we read the register

Refused. Only the applicant can appeal, within the statutory time limit, and a revised scheme can be submitted instead.

Proposal

Certificate of lawfulness for proposed erection of rear dormer, linked dormer to outrigger and x3 front rooflights to dwellinghouse

As published by the council, reference 25/2344

Application record

Reference
25/2344
Type
Certificate of Lawfulness - Proposed
Status
Decided
Decision
Certificate of Lawfulness - Refused
Received
12 Aug 2025
Validated
19 Aug 2025
Decided
9 Oct 2025
Ward
Queens Park
Decision by
Delegated Team Manager
Postcode
NW10 5QU

Site history

Applications at this address on the Brent register

This site has had 3 applications since 2025: 2 approved, 1 refused.

  • 25/2867 Granted

    9 Mostyn Gardens, London, NW10 5QU

    Certificate of lawfulness for proposed rear dormer window, linked dormer to outrigger and x3 front rooflights to dwellinghouse

    Decided 28 Oct 2025 Lawful development
  • 25/2347 Granted

    9 Mostyn Gardens, London, NW10 5QU

    Demolition of conservatory and store, proposed construction of single storey side to rear extension to dwellinghouse.

    Decided 8 Oct 2025 Householder

Timeline

Dates from the published record

  1. 12 Aug 2025

    Received by Brent

  2. 19 Aug 2025

    Validated

    Checked as complete and ready for consideration.

  3. 9 Oct 2025

    Decision issued: Certificate of Lawfulness - Refused

  4. 11 Aug 2026

    Added to PlanIndex

Who's behind it

Company information only, from the register and Companies House

Agent on file, a design practice registered in London

64 applications on PlanIndex · across 16 councils · 69% granted

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Documents

Plans, drawings, consultee responses and the officer's report

8 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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What this refusal means

Brent refused this application for the reasons on the decision notice; only the applicant can appeal, and refused schemes often return in revised form. More in our guide to what happens after a planning decision.

About lawful development applications

A lawful development certificate is a legal determination that existing or proposed works do not need planning permission; the merits of the scheme are not considered. More in our guide to planning application types.

Nearby applications

Within 500 metres

  • 9 Mostyn Gardens, London, NW10 5QU

    25/2347 Submitted 12 Aug 2025 0m away

    Demolition of conservatory and store, proposed construction of single storey side to rear extension to dwellinghouse.

    Granted Householder Extension Demolition 8 docs
    Small domestic

  • 9 Mostyn Gardens, London, NW10 5QU

    25/2867 Submitted 10 Oct 2025 0m away

    Certificate of lawfulness for proposed rear dormer window, linked dormer to outrigger and x3 front rooflights to dwellinghouse

    Granted Lawful development Extension Loft or dormer +1 8 docs
    Domestic

  • 24 Mostyn Gardens, London, NW10 5QX

    25/3349 Submitted 2 Dec 2025 29m away

    Non material amendment (New side wall of the extension to be the party wall with No. 22 Mostyn Gardens) of Householder planning application reference 25/2386 dated 17/11/2025 for Proposed erection of single-storey side to rear extension to dwellinghouse

    Refused Amendments Extension 5 docs
    Small domestic

  • 24 Mostyn Gardens, London, NW10 5QX

    26/0597 Submitted 10 Mar 2026 29m away

    Proposed erection of single-storey side to rear extension to dwellinghouse

    Granted Householder Extension 12 docs
    Small domestic

  • 24 Mostyn Gardens, London, NW10 5QX

    25/2386 Submitted 18 Aug 2025 29m away

    Proposed erection of single-storey side to rear extension to dwellinghouse.

    Granted Householder Extension 13 docs
    Small domestic

  • 16 Mostyn Gardens, London, NW10 5QX

    26/1562 Submitted 15 Jun 2026 30m away

    79% historically approved · decision due ~10 Aug

    Proposed demolition of chimney stack and erection of single-storey side to rear extension to dwel...

    Decided Extension Demolition
    Small domestic

In Brent

  • 26/0783 Granted

    3 Hamilton Road, London, NW10 1NU

    Certificate of lawfulness for existing single-storey rear extension to dwellinghouse

    26 Mar 2026 Lawful development
  • 26/1946 Awaiting decision

    120 Gladstone Park Gardens, London, NW2 6RL

    Certificate of lawfulness for proposed rear dormer extension with Juliet balcony, hip to gable roof extension, installation of 1x window to side elevation and 2x front rooflights to dwellinghouse.

    30 Jul 2026 Lawful development
  • 26/1208 Granted

    50 Ballogie Avenue, London, NW10 1TA

    Certificate of lawfulness for proposed rear dormer extension, hip to gable roof extension, alteration to fenestration and installation of rooflights to the dwellinghouse

    13 May 2026 Lawful development
  • 26/1015 Refused

    5 Midholm, Wembley, HA9 9LJ

    Certificate of lawfulness for proposed installation of solar panels to the side and rear roofslope of the dwellinghouse.

    23 Apr 2026 Lawful development
  • 26/1176 Refused

    47 Barn Rise, Wembley, HA9 9NH

    Certificate of lawfulness for proposed single storey outbuilding in rear garden of the dwellinghouse.

    11 May 2026 Lawful development