Planning application
20 Forty Avenue, Wembley, HA9 8JP
Works: Extension Loft or dormer 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 infill extension, rear dormer extension with dormer to rear outrigger, 2x front rooflights and installation of 2x windows to gable side elevation of the dwellinghouse.
As published by the council, reference 26/0589
Application record
- Reference
- 26/0589
- Type
- Certificate of Lawfulness - Proposed
- Status
- Decided
- Decision
- Refused As published: Certificate of Lawfulness - Refused
- Received
- 9 Mar 2026
- Validated
- 9 Mar 2026
- Decided
- 29 Apr 2026
- Ward
- Preston
- Decision by
- Delegated Team Manager
- Postcode
- HA9 8JP
Site history
Applications at this address on the Brent register
This site has had 5 applications since 2025: 1 approved, 3 refused.
-
26/2552 Awaiting decision
20 Forty Avenue, Wembley, HA9 8JP
Certificate of lawfulness for proposed front porch extension, single-storey rear infill extension...
-
26/0880 Granted
20 Forty Avenue, Wembley, HA9 8JP
Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6.00m Maximum height - 3.86m Eaves height - 3.00m
-
26/0812 Refused
20 Forty Avenue, Wembley, HA9 8JP
Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6.00m Maximum height - 3.86m Eaves height - 3.00m
-
25/3587 Refused
20 Forty Avenue, Wembley, HA9 8JP
Certificate of lawfulness for proposed single storey rear infill extension, L-shaped rear dormer window with 2x front rooflights and installation of 2x windows to the gable side elevation of the dwellinghouse.
Timeline
Dates from the published record
-
9 Mar 2026
Received by Brent
-
29 Apr 2026
Decision issued: Certificate of Lawfulness - Refused
-
25 Jul 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Better Building Design Ltd. Agent, a design practice registered in London
Active · incorporated 2017 · London
30 applications on PlanIndex · across 12 councils · 82% 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 recordDocuments
Plans, drawings, consultee responses and the officer's report
14 documents on file for this application
- Final delegated report
- Final decision notice
- Location and block plan
- Proposed block plan
- Existing floor plans
- Proposed floor plans
- Existing and proposed loft plan
- Existing and proposed roof plan
- Existing and proposed front and rear elevations
- Existing and proposed gable side elevation
- Existing and proposed side elevation (view from no.22)
- Existing and proposed section a & b
- Cover letter and site photos
- Application form redacted
Watch members (£5 a month) open the document list from here.
Open the documentsWhat 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
-
30 Forty Avenue, Wembley, HA9 8JP
Proposed ground floor side extension; first floor side and rear extension; loft conversion with dormer window and installation of 3 x front facing rooflights to dwellinghouse
Withdrawn Householder Extension Loft or dormer +1 2 docsDomestic -
20 Forty Avenue, Wembley, HA9 8JP
Certificate of lawfulness for proposed single storey rear infill extension, L-shaped rear dormer window with 2x front rooflights and installation of 2x windows to the gable side elevation of the dwellinghouse.
Refused Lawful development Extension Loft or dormer +1 14 docsSmall domestic -
32 Forty Avenue, Wembley, HA9 8JP
Demolition of existing dwellinghouse and erection of part 3 storey part 4 storey building comprising 7 self-contained flats, creation of basement floor level, private and communal amenity spaces, associated off road parking, waste and cycle storage
Refused Full applications New dwelling Demolition 31 docsDomestic -
34 Forty Avenue, Wembley, HA9 8JP
Demolition of existing dwellinghouse and erection of part 3 storey part 4 storey building comprising 7 self-contained flats, creation of basement floor level, private and communal amenity spaces, associated off road parking, waste and cycle storage
Refused Full applications New dwelling Demolition 29 docsDomestic -
30 Forty Avenue, Wembley, HA9 8JP
Certificate of lawfulness for proposed hip to gable loft conversion with rear dormer window and installation of 3 x front facing rooflights to dwellinghouse
Granted Lawful development Loft or dormer Windows or glazing 9 docsDomestic -
20 Forty Avenue, Wembley, HA9 8JP
Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6.00m Maximum height - 3.86m Eaves height - 3.00m
Refused Prior approval Extension 9 docsSmall domestic
Other lawful development applications
In Brent
-
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
-
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
-
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.
-
26/1176 Refused
47 Barn Rise, Wembley, HA9 9NH
Certificate of lawfulness for proposed single storey outbuilding in rear garden of the dwellinghouse.
-
26/1166 Refused
66 Okehampton Road, London, NW10 3EP
Certificate of lawfulness for proposed rear dormer and side dormer extension, 1x front rooflight, replacing side elevation window and door with aluminium frame windows and doors to dwellinghouse.