15a to 15c Windmill Road, Brentford, London TW8 0QD Data via plota.co.uk

P/2026/1421 - PF-Full Applications Approved
Change of useExtensions & alterationsNew homesSolar & renewables

Proposal

Conversion of three self-contained flats into one house and erect a single storey wrap-around rear extension at lower ground floor level. Replacement of all windows to sash windows and one rear window to juliet balcony. Relocating the main entrance from the side to the front elevation with a canopy, the erection of a single storey side extension and to install two air source heat pumps in the rear garden. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
11 May 2026
✓
Approved
3 Jul 2026

Approved on 3 Jul 2026 · Last checked 19 Sept 2026

Documents 11

Decision & officer reports 3

PDF DECTP2 P-Decision Notice · 3 Jul 2026 View ↗ PDF P-Delegated Report P-Delegated Report · 2 Jul 2026 View ↗ PDF decision notice approval.pdf P-Supporting Information · 11 May 2026 View ↗

Statements & assessments 3

PDF Fire statement.pdf P-Published Fire Safety · 11 May 2026 View ↗ PDF ENERGY STATEMENT.pdf P-Published Energy Statement · 11 May 2026 View ↗ PDF Design Access Windmill.pdf P-Design statement · 11 May 2026 View ↗

Plans & drawings 2

PDF LocationPlan.pdf-9D1FF551160C49BF9B0C2F4129B1D61C.pdf P-Location Plan · 11 May 2026 View ↗ PDF 1246_Windmill_BLOCK PLAN.pdf P-Proposed Site · 11 May 2026 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 11 May 2026 View ↗

Other documents 2

PDF CILSELFE CIL Exemption or Relief Claim · 9 Jul 2026 View ↗ PDF 1246_Windmill_APPLICATION 1 - PLANNING.pdf P-Proposed Other · 11 May 2026 View ↗

All documents on the council site ↗

Site constraints 6

St Paul's Brentford conservation area
Also St Paul's, Brentford. Demolition needs planning permission and permitted development is restricted.
The council must give weight to preserving or enhancing the area's character and appearance. Not every council has published its boundaries as open data.
Article 4 direction
Dwellinghouses (C3) to small HMOs (C4) - borough-wide Article 4 Direction. Named permitted development rights are withdrawn here.
An Article 4 direction withdraws particular permitted development rights, so work that would normally need no application needs one here. Not every council has published its directions.
Air quality management area: Hounslow AQMA
The council has declared the area as failing an air quality objective.
Schemes that add traffic, parking or combustion plant are assessed against the area's action plan and may need an air quality assessment.
Council record ↗
Also on the record
1 listed building within 150 m; Inside the Hounslow built-up area; Public transport access: PTAL 3 (moderate), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No scheduled monument at the site

Checked on 6 October 2026. Historic England, the Environment Agency, Natural England, Transport for London (public transport access levels, Powered by TfL Open Data, OGL v3.0, contains OS data © Crown copyright and database right 2025) and council datasets, Open Government Licence. A boundary can run through a site and the council holds the definitive record: confirm with the council before relying on this.

Building

Floor area55 m² (592 sq ft)
Energy ratingD (60 out of 100), could reach C
PropertySemi-detached maisonette, 3 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsGranite or whinstone, as built, no insulation (assumed)

From the energy performance certificate lodged in November 2020, the latest held for this property. The building may have changed since. View the certificate

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Other new applications on this street

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Erection of a single storey rear infill extension.

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12 Oct 2026Pending

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Variation of Conditions 2 (approved plans) and Condition 5 (cycle parking facil...

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Important details

Council
Hounslow
Application type
PF-Full Applications
Postcode
TW8 0QD
Received
11 May 2026
Validated
11 May 2026
Ward
Brentford West
Case officer
Show
Decision
Approved
Decision date
3 Jul 2026
Applicant
Show

How this decision compares

Decided in 53 days from validation, about the council's usual 56 days. Approved, as 52% of changes of use here are.

62%decided within 8 weeks
52%approved
102decided in the last year

Plota live figures for changes of use decided by Hounslow in the last twelve months, from validation. Hounslow decision record →

Public comments

No public comments yet.

Read the comments on the council site ↗

Consultation & key dates

Consultation
1 Jun 2026
Comments by
26 Jun 2026
Site or press notice
5 Jun 2026
Statutory expiry
6 Jul 2026

Historical activity at this location

25 nearby applications on record - archival context, not part of the live application.

Within ~100m

Nearby activity

2025 Approved
15a To 15c Windmill Road, Brentford, TW8 0QD
Conversion of three self-contained flats into one house and erect a single storey wrap-ar…
P/2025/3344
2025 Approved
1 Clifden Road, Brentford, TW8 0PB
Erection of a detached outbuilding in the rear garden and installation of pergola structu…
P/2025/3425
2025
15a To 15c Windmill Road, Brentford, TW8 0QD
Conversion of three self-contained flats into one house and erect a single storey wrap-ar…
P/2025/3345
2025 Approved
15A - 15C Windmill Road, Brentford TW8 0QD
Felling of Leyland Cypress within a conservation area.
P/2025/1362
2025 Withdrawn
69 Hamilton Road, Brentford, TW8 0QF
Installation of nine solar panels to the roof of the house.
P/2025/0918
2024 Approved
9 & 10 Hamilton Road Brentford TW8 0QE
Erection of a side infill extension to both properties
P/2024/2039
2024 Approved
7 CLIFDEN ROAD, BRENTFORD, TW8 0PB
Demolition of existing rear extension and erection of a single storey rear wrap round ext…
P/2024/0983
2022 Approved
71 HAMILTON ROAD, BRENTFORD, TW8 0QF
Works to trees in a conservation area. Felling of fifteen dying Leylandii trees (G2) alon…
P/2022/1673
2022 Approved
15A WINDMILL ROAD, BRENTFORD, TW8 0QD
Erection of a single storey rear and side extensions.
P/2022/0871
2022 Approved
5 WINDMILL ROAD, BRENTFORD, TW8 0QD
Works to a selection of trees within a conservation area. T1 Sycamore - Reduce length of…
P/2022/1072
2021 Approved
67 HAMILTON ROAD, BRENTFORD, TW8 0QF
Erection of a single storey rear infill and rear extension following demolition of existi…
P/2021/3755
2021 Approved
55 HAMILTON ROAD, BRENTFORD, TW8 0QF
Works to two Plum trees in rear garden in Conservation Area. Reduce crown of T1 by 10 to…
P/2021/3186
2021 Approved
17 WINDMILL ROAD, BRENTFORD, TW8 0QD
Works to two Leylandii trees in conservation area. Remove overhang by at least 8ft and de…
P/2021/3536
2021 Approved
4 BROCKSHOT CLOSE, BRENTFORD, TW8 0PR
Certificate or Lawfulness for the proposed erection of a rear roof extension incorporatin…
P/2021/2638
2021 Approved
8 HAMILTON ROAD, BRENTFORD, TW8 0QE
Erection of a rear roof extension with Juliet balcony and two front roof windows to the h…
P/2021/1763
2021 Approved
1 CLIFDEN ROAD, BRENTFORD, TW8 0PB
Erection of single storey side infill and rear extension.
P/2021/0628
2020 Approved
1 CLIFDEN ROAD, BRENTFORD, TW8 0PB
Erection of rear roof extension with two front roof windows to the house.
P/2020/4443
2020 Approved
LAND AT ORCHARD ROAD AND WINDMILL ROAD, BRENTFORD, TW8 0PW
Erection of Five two-storey houses with associated landscaping, cycle storage, refuse and…
P/2020/3755
2020 Approved
67 HAMILTON ROAD, BRENTFORD, TW8 0QF
Erection of a single storey rear and side infill extension following demolition of existi…
P/2020/4532
2019 Approved
8 HAMILTON ROAD, BRENTFORD, TW8 0QE
Works to trees in a conservation area T1 - Holly - to partial crown reduction to reduce t…
P/2019/3897
2016 Approved
56 HAMILTON ROAD BRENTFORD LONDON TW8 0QF
Erection of a rear roof extension with two front roof windows and a single storey rear in…
P/2016/2726
2016 Approved
8 WINDMILL ROAD BRENTFORD TW8 0PW
Work to two Ash Tree (T1 & T2) in a conservation area
P/2016/3268
2016 Approved
67 HAMILTON ROAD BRENTFORD TW8 0QF
Erection of a front and rear roof extensions incorporating 2 front roof windows and a sin…
P/2016/1567
2016 Approved
Garrett House 24 WINDMILL ROAD BRENTFORD LONDON TW8 0QA
Details of contamination validation report submitted pursuant to condition 9d of planning…
P/2016/1341
2016 Refused
66 HAMILTON ROAD BRENTFORD LONDON TW8 0QF
Erection of a single storey wrap around extension and mansard roof extension to the house
P/2016/0715
Hounslow
Planning Authority Score
2.1/10
Poor
#268 of 296 councils
Relevant to this application:
Householder decisions

Hounslow is slower than most councils at deciding householder applications, ranking #203 out of 296. 47% of applications have the time limit extended, above the 41% national average. Hounslow is also one of the strictest councils - it refuses more householder applications than almost any other, with only 75% approved vs 90% nationally.

One of the strictest councils
only 75% approved vs 90% nationally
These figures are council-wide context, not a prediction for this application. View full council performance
Hounslow decision statistics
Based on MHCLG data, the year to March 2026
71%
Overall approval rate
Below avg (87%) #294 of 296
75%
Householder approved
Below avg (90%) #293 of 296
56%
Decided in 8 weeks
Below avg (63%) #203 of 296
47%
Extended time limit
Above avg (41%) #208 of 296
38%
Minor dwellings approved
82 decided (1-9 homes)
93%
Major dwellings approved
14 decided (10+ homes)
29%
Change of use approved
72 decided
1,191
Total decisions
340 refused in the year to March 2026
Source: MHCLG planning statistics · See full council rankings

Energy performance: Energy performance certificates from the Energy Performance of Buildings Register, Ministry of Housing, Communities and Local Government. Contains public sector information licensed under the Open Government Licence v3.0. © Crown copyright 2026.