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Planning application

9 Waltham Avenue, London, NW9 9SH

Granted Brent 25/3084 Certificate of Lawfulness - Proposed

Works: Extension Windows or glazing Small domestic

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

Permission granted. Work must normally begin within three years of the decision or the permission lapses.

Proposal

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 25/3084

Application record

Reference
25/3084
Type
Certificate of Lawfulness - Proposed
Status
Decided
Decision
Granted As published: Certificate of Lawfulness - Granted
Received
3 Nov 2025
Validated
11 Nov 2025
Decided
30 Dec 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
  • 25/2493 Refused

    9 Waltham Avenue, London, NW9 9SH

    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.

    Decided 24 Oct 2025 Lawful development

Timeline

Dates from the published record

  1. 3 Nov 2025

    Received by Brent

  2. 11 Nov 2025

    Validated

    Checked as complete and ready for consideration.

  3. 30 Dec 2025

    Decision issued: Certificate of Lawfulness - Granted

  4. 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.

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Open the documents

What this grant of permission means

Brent granted permission on 30 December 2025, subject to any conditions on the decision notice. Work must normally begin within three years or the permission lapses. 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

  • 3 Waltham Avenue, London, NW9 9SH

    21/3295 Submitted 27 Aug 2021 50 yards away

    Certificate of lawfulness for proposed hip to gable loft conversion with rear dormer window, juliet balcony, 3 front rooflights and erection of single storey outbuilding at rear of dwellinghouse.

    Refused Lawful development Loft or dormer Windows or glazing 9 docs
    Small domestic

  • 3 Waltham Avenue, London, NW9 9SH

    21/3294 Submitted 27 Aug 2021 50 yards away

    Proposed single storey side to rear extension to dwellinghouse.

    Refused Householder Extension 8 docs
    Small domestic

  • 29 Waltham Avenue, London, NW9 9SH

    25/3228 Submitted 18 Nov 2025 50 yards away

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

    Granted Householder 7 docs
    Small domestic

  • 9 Waltham Avenue, London, NW9 9SH

    25/2493 Submitted 1 Sep 2025 50 yards away

    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.

    Refused Lawful development Extension Windows or glazing 9 docs
    Small domestic

  • 31 Waltham Avenue, London, NW9 9SH

    21/4403 Submitted 1 Dec 2021 50 yards away

    Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 3245m Eaves height - 2995m

    Refused Prior approval Extension 5 docs
    Small domestic

  • 9 Waltham Avenue, London, NW9 9SH

    26/0193 Submitted 27 Jan 2026 50 yards 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

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