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Planning application

9 Waltham Avenue, London, NW9 9SH

Refused Brent 25/2493 Certificate of Lawfulness - Proposed

Works: Extension Windows or glazing Small 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 single storey rear extension and conversion of side garage into a habitable room with raised roof height and replacement of garage door with window to the front elevation of the dwellinghouse.

As published by the council, reference 25/2493

Application record

Reference
25/2493
Type
Certificate of Lawfulness - Proposed
Status
Decided
Decision
Certificate of Lawfulness - Refused
Received
1 Sep 2025
Validated
1 Sep 2025
Decided
24 Oct 2025
Ward
Queensbury
Decision by
Delegated Team Manager
Postcode
NW9 9SH

Site history

Applications at this address on the Brent register

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

  • 26/0193 Granted

    9 Waltham Avenue, London, NW9 9SH

    Proposed single storey rear extension, conversion of garage into habitable room with replacement of garage door with window to front elevation and alterations to garage roof, hip to gable extension, rear dormer window with 2x front rooflights, installation of a new side window and installation of window to the side roof slope to the dwellinghouse.

    Decided 21 Apr 2026 Householder
  • 25/3084 Granted

    9 Waltham Avenue, London, NW9 9SH

    Proposed single storey rear extension and conversion of side garage into a habitable room with raised roof height and replacement of garage door with window to the front elevation of the dwellinghouse.

    Decided 30 Dec 2025 Lawful development

Timeline

Dates from the published record

  1. 1 Sep 2025

    Received by Brent

  2. 24 Oct 2025

    Decision issued: Certificate of Lawfulness - Refused

  3. 11 Aug 2026

    Added to PlanIndex

Documents

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

9 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.

Trade members open them 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 500 metres

  • 29 Waltham Avenue, London, NW9 9SH

    25/3228 Submitted 18 Nov 2025 0m away

    Proposed single storey outbuilding to the rear garden of the dwellinghouse.

    Granted Householder 7 docs
    Small domestic

  • 9 Waltham Avenue, London, NW9 9SH

    26/0193 Submitted 27 Jan 2026 0m away

    Proposed single storey rear extension, conversion of garage into habitable room with replacement of garage door with window to front elevation and alterations to garage roof, hip to gable extension, rear dormer window with 2x front rooflights, installation of a new side window and installation of window to the side roof slope to the dwellinghouse.

    Granted Householder Extension Loft or dormer +1 13 docs
    Small domestic

  • 23 Waltham Avenue, London, NW9 9SH

    25/3093 Submitted 4 Nov 2025 0m away

    Proposed two-storey side to rear extension, raised patio, hip to gable-end roof extension, rear dormer, 2x front rooflights, front porch extension and outbuilding in rear garden of dwellinghouse

    Granted Householder Extension Loft or dormer 10 docs
    Small domestic

  • 9 Waltham Avenue, London, NW9 9SH

    25/3084 Submitted 3 Nov 2025 0m away

    Proposed single storey rear extension and conversion of side garage into a habitable room with raised roof height and replacement of garage door with window to the front elevation of the dwellinghouse.

    Granted Lawful development Extension Windows or glazing 9 docs
    Small domestic

  • 37 Waltham Avenue, London, NW9 9SH

    26/1589 Submitted 23 Jun 2026 2m away

    79% historically approved · decision due ~26 Aug

    Demolition of existing side garage and utility and proposed single storey side and rear extension...

    Decided Extension Demolition
    Small domestic

  • 106 Valley Drive, London, NW9 9NS

    20/2410 Submitted 10 Aug 2020 63m away

    Retention of two storey side and rear extension, garage conversion, loft conversion with rear dormer window to dwellinghouse.

    Refused Householder Extension Loft or dormer +1 12 docs
    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