4 Dawes Avenue, Isleworth, TW7 7JT Data via plota.co.uk

P/2026/2374 - Non-Material Minor Amendment to an existing Planning Application Refused
Admin / procedural

Proposal

Non material amendment to change the flat roof to a pitched roof of planning permission P/2026/1102 approved 29/07/2026 for the erection of a single storey rear extension to the house. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
17 Aug 2026
✗
Refused
10 Sept 2026
Appeal
Not lodged

Refused on 10 Sept 2026 · Last checked 10 Sept 2026

Documents 10

Decision & officer reports 1

PDF P-Delegated Report P-Delegated Report · 9 Sept 2026 View ↗

Plans & drawings 7

PDF Approved Plans P-Proposed Plans · 9 Sept 2026 View ↗ PDF Approved Plans P-Proposed Plans · 9 Sept 2026 View ↗ PDF Approved Plans P-Proposed Elevation · 9 Sept 2026 View ↗ PDF Approved Plans P-Proposed Elevation · 9 Sept 2026 View ↗ PDF prop-03a.pdf P-Proposed Elevation · 17 Aug 2026 View ↗ PDF prop-04a.pdf P-Proposed Elevation · 17 Aug 2026 View ↗ PDF prop-01a.pdf P-Proposed Plans · 17 Aug 2026 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 17 Aug 2026 View ↗

Other documents 1

PDF prop-02a.pdf P-Proposed Site · 17 Aug 2026 View ↗

All documents on the council site ↗

Associated applications 3

Site constraints 6

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 Named permitted development rights are withdrawn here.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
National infrastructure project: Teddington Direct River Abstraction (TDRA), at pre-application; 1 listed building within 150 m; Inside the Hounslow built-up area; Public transport access: PTAL 2 (poor), 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, the Planning Inspectorate, 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.

Sales history 1

Last sold for £480,000 in February 2021. Semi-detached house, freehold.

17 February 2021£480,000

Sale prices from HM Land Registry's price paid record, matched to this application by its address.

Building

Floor area107 m² (1,152 sq ft)
Energy ratingC (72 out of 100), could reach B
PropertySemi-detached house, 5 habitable rooms
Built1976 to 1982
HeatingBoiler and radiators, mains gas
WallsCavity wall, as built, partial insulation (assumed)

From the energy performance certificate lodged in February 2024, 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

4 Aug 2026Approved

28 Dawes Avenue, Isleworth, TW7 7JT

Erection of a single storey rear extension with two roof lanterns and an additio...

P/2026/2259
12 Aug 2026Approved

43 Dawes Avenue, Isleworth, TW7 7JS

Certificate of Lawfulness for the proposed hip to gable conversion, front roof l...

P/2026/2332

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13 Oct 2026Pending

52 Worple Road,Isleworth,TW7 7AR

Erection of a rear roof extension with two front roof windows.

P/2026/2909
30 Sept 2026Pending

18 Worple Avenue, Isleworth, TW7 7JJ

Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 3.00 m...

PA/2026/2771
8 Oct 2026Pending

Victory Business Centre,Fleming Way,Isleworth,TW7 6DB

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6 Oct 2026Pending

4 Dawes Avenue, Isleworth, TW7 7JT

Variation of conditions 2 (approved plans) and 3 (external materials) to allow a...

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6 Oct 2026Pending

52 Percy Road, Isleworth, TW7 7HB

Works to trees within a conservation area. REAR GARDEN G1 Sycamore (Acer pseudop...

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Important details

Council
Hounslow
Application type
Non-Material Minor Amendment to an existing Planning Application
Postcode
TW7 7JT
Received
17 Aug 2026
Validated
17 Aug 2026
Ward
Isleworth
Case officer
Show
Decision
NMA Refused
Decision date
10 Sept 2026
Applicant
Show

Public comments

No public comments yet.

Read the comments on the council site ↗

Consultation & key dates

Consultation
17 Aug 2026
Statutory expiry
14 Sept 2026

Historical activity at this location

26 previous applications on record - archival context, not part of the live application.

This property

Previous applications at this address

2025 Approved
Ground floor rear extension 6.00 metres deep, maximum height 3.28 metres, 2.77 metres hig…
PA/2025/3597
Within ~100m

Nearby activity

2025 Refused
6 Woodstock Avenue, Isleworth, TW7 7JF
Retrospective application for the conversion of the house into two houses with associated…
P/2025/1692
2024 Refused
6 Woodstock Avenue, Isleworth, TW7 7JF
Retrospective application for the conversion of a single family house into two houses
P/2024/4247
2025 Withdrawn
294 Twickenham Road, Isleworth, TW7 7DU
dropped kerb outside of 294 twickenham road for a disabled driver
P/2025/0643
2022 Approved
48 WORPLE AVENUE, ISLEWORTH, TW7 7HZ
Erection of a single storey rear extension to the house
P/2022/3683
2021 Refused
2 DAWES AVENUE, ISLEWORTH, TW7 7JT
Erection of a hip to gable and rear roof extension with two juliet balconies and three fr…
P/2021/3918
2021 Approved
7 DAWES AVENUE, ISLEWORTH, TW7 7JU
Erection of a single storey rear extension with two roof lanterns to the house
P/2021/2898
2021 Approved
7 DAWES AVENUE, ISLEWORTH, TW7 7JU
Erection of a single storey outbuilding with storage area and communal space.
P/2021/2897
2021 Approved
12 DAWES AVENUE, ISLEWORTH, TW7 7JT
Part single storey, part two storey rear extension.
P/2021/0726
2020 Refused
12 DAWES AVENUE, ISLEWORTH, TW7 7JT
Erection of a part single part two storey rear extension to the house
P/2020/2247
2020 Refused
6 WOODSTOCK AVENUE, ISLEWORTH, TW7 7JF
Erection of a hip to gable and rear roof extension with two front roof windows, erection…
P/2020/1643
2018 Approved
6 DAWES AVENUE, ISLEWORTH, TW7 7JT
Erection of a single storey rear extension to the house
P/2018/4417
2018 Refused
1 DAWES AVENUE, ISLEWORTH, TW7 7JU
Conversion of the house into two self-contained flats
P/2018/4258
2018 Approved
6 DAWES AVENUE, ISLEWORTH, TW7 7JT
Ground floor rear extension 6 metres deep, maximum height of 3 metres, 3 metres high to t…
PA/2018/3189
2018 Approved
6 DAWES AVENUE, ISLEWORTH, TW7 7JT
Ground floor rear extension 6 metres deep, maximum height of 3 metres, 3 metres high to t…
PA/2018/2639
2018 Approved
6 DAWES AVENUE ISLEWORTH LONDON TW7 7JT
Ground floor rear extension 6m deep, 3m high to the eaves with the maximum height of 3m.
PA/2018/2010
2017 Approved
12 WOODSTOCK AVENUE ISLEWORTH TW7 7JF
External wall insulation
P/2019/4441
2017 Approved
12 WOODSTOCK AVENUE ISLEWORTH TW7 7JF
External wall insulation
P/2019/4622
2017 Approved
294 TWICKENHAM ROAD ISLEWORTH TW7 7DU
External wall insulation
P/2020/0118
2017 Approved
21 DAWES AVENUE ISLEWORTH TW7 7JU
External wall insulation
P/2019/4755
2017 Approved
3 DAWES AVENUE ISLEWORTH TW7 7JU
External wall insulation
P/2019/4754
2017 Approved
58 WORPLE AVENUE ISLEWORTH TW7 7HZ
External wall insulation
P/2019/4446
2017 Approved
DAWES AVENUE ISLEWORTH TW7 7JT
Application of external wall insulation to 16, 29 Dawes Avenue and 17, 23 Woodstock Avenue
P/2017/2454
2017 Approved
288 TWICKENHAM ROAD ISLEWORTH TW7 7DT
External wall insulation
P/2020/0117
2016 Refused
19 DAWES AVENUE ISLEWORTH TW7 7JU
Erection of a single storey front extension to the house.
P/2016/4080
2016 Withdrawn
298 TWICKENHAM ROAD ISLEWORTH LONDON TW7 7DU
Retrospective application for canopy extension
P/2016/0217
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

Sale prices: Contains HM Land Registry data © Crown copyright and database right 2026. This data is licensed under the Open Government Licence v3.0.

Freehold boundary: © Crown copyright and database rights 2026, HM Land Registry. Polygons © Crown copyright and database rights 2026 Ordnance Survey 100026316. Conditions of use

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.