Skip to content
PlanIndex Get alerts
Menu

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
Refused As published: 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

IDEAL Design Ltd Agent, a design practice registered in London

Active · incorporated 2018 · London

80 applications on PlanIndex · across 17 councils · 70% 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 record

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.

Watch members (£5 a month) open the document list from here.

Open the documents

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 0.3 miles

  • 9 Mostyn Gardens, London, NW10 5QU

    25/2347 Submitted 12 Aug 2025 50 yards 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 50 yards 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

  • 10 Mostyn Gardens, London, NW10 5QX

    24/3103 Submitted 4 Nov 2024 50 yards away

    Certificate of lawfulness for proposed rear dormer with juliet balcony, loft conversion into habitable space and installation of 3x front rooflights to dwellinghouse

    Granted Lawful development Loft or dormer 8 docs
    Domestic

  • 24 Mostyn Gardens, London, NW10 5QX

    25/3349 Submitted 2 Dec 2025 50 yards 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

  • 10 Mostyn Gardens, London, NW10 5QX

    24/3378 Submitted 27 Nov 2024 50 yards away

    Proposed erection of rear dormer with juliet balcony, linked dormer to outrigger and x3 front rooflights to dwellinghouse.

    Granted Householder Extension Loft or dormer 5 docs
    Domestic

  • 24 Mostyn Gardens, London, NW10 5QX

    26/0597 Submitted 10 Mar 2026 50 yards away

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

    Granted Householder Extension 12 docs
    Small domestic

In Brent

  • 26/2285 Awaiting decision

    137 Chatsworth Road, London, NW2 5QT

    Certificate of lawfulness for proposed use as supported housing

    Received 8 Sep, published by the council 21 Sep 2026 Lawful development
  • 26/2277 Awaiting decision

    65 The Avenue, Wembley, HA9 9PH

    Certificate of lawfulness for proposed conversion of outbuilding into a gym and sauna and extension to the outbuilding in rear garden of the dwellinghouse.

    Received 8 Sep, published by the council 21 Sep 2026 Lawful development
  • 26/2199 Awaiting decision

    Flat 8, 399 Neasden Lane North, London, NW10 0BD

    Certificate of lawfulness for existing use of rear unit 8 as a self-contained flat.

    Received 2 Sep, published by the council 21 Sep 2026 Lawful development
  • 26/2093 Awaiting decision

    17 Buller Road, London, NW10 5BS

    Certificate of lawfulness for proposed alterations to front, side and rear fenestrations including installation of ground floor side oriel window and rear timber door to dwellinghouse

    Received 18 Aug, published by the council 21 Sep 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

    Received 13 May, published by the council 25 Jul 2026 Lawful development