58 Bassett Gardens,Isleworth,TW7 4QY Data via plota.co.uk

P/2026/2938 - Lawful Development Certificate (Proposed) REGISTERED: Under Assessment
Extensions & alterations

Proposal

Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and two front roof windows. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
16 Oct 2026
Decision
Expected by 11 Dec 2026

Under consideration

No decision has been issued yet. Plota predicts a decision around 9 Dec 2026, from Hounslow's recent extensions.

Documents 5

Plans & drawings 2

PDF 58 Bassett Av Location Plan.pdf P-Location Plan · 16 Oct 2026 View ↗ PDF PD5801.pdf P-Existing Elevation · 16 Oct 2026 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 16 Oct 2026 View ↗

Other documents 2

PDF PD5802.pdf P-Proposed Other · 16 Oct 2026 View ↗ PDF PD5803.pdf P-Proposed Site · 16 Oct 2026 View ↗

All documents on the council site ↗

Site constraints 8

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 Named permitted development rights are withdrawn here.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 ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
Registered park or garden 125 m away: Osterley Park; Conservation area 58 m away: Osterley Park; Inside the Hounslow built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square; National infrastructure project 1904 m away: Teddington Direct River Abstraction (TDRA), at pre-application.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 17 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.

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Other new applications on this street

28 Sept 2026Pending

106 Bassett Gardens,Isleworth,TW7 4QY

Non-Material Amendment to add a side window on the ground floor extension pursua...

P/2026/2730
24 Aug 2026Approved

90 Bassett Gardens,Isleworth,TW7 4QY

Erection of a single storey rear and side infill extension with two roof windows...

P/2026/2416
30 Jun 2026Approved

110 Bassett Gardens, Isleworth, TW7 4QY

Erection of a rear wraparound extension and part first floor rear extension. Con...

P/2026/1941
29 Jun 2026Approved

2 Bassett Gardens, Isleworth, TW7 4QZ

Erection of two single storey rear extensions to the bungalow

P/2026/1918

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Land at Oakley Close,Oakley Close, Isleworth, TW7 4HZ

Details of Conditions 15 (Cycle Parking); Condition 17 (Access Road) and Conditi...

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89 Thornbury Road,Isleworth,TW7 4NL

Formation of vehicular access to the front of the house with alterations to the ...

P/2026/2873
6 Oct 2026Pending

271 Jersey Road, Isleworth, TW7 4RF

Works to tree within a conservation area. Pine (T1) - Fell to ground level.

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5 Oct 2026Pending

3 Burlington Road, Isleworth, TW7 4LU

Certificate of lawfulness proposed for the erection of roof extensions to both ...

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Details of conditions 7 (Car Parking Management Plan), 8 (Traffic Management Pla...

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Works to trees in a Conservation Area T1+2, Chestnuts, located off main driveway...

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Important details

Council
Hounslow
Application type
Lawful Development Certificate (Proposed)
Postcode
TW7 4QY
Received
16 Oct 2026
Validated
16 Oct 2026
Ward
Osterley & Spring Grove
Case officer
Show
Applicant
Show

Decision outlook

Day 3 of the 56-day target. Hounslow usually decides extensions by day 54.

Day 353 days to the 56-day target
78%decided within 8 weeks
81%approved
924decided in the last year

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

Consultation & key dates

Consultation
16 Oct 2026
Statutory expiry
11 Dec 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
92 Bassett Gardens, Isleworth, TW7 4QY
Erection of a part first floor rear extension and a rear roof extension with a hip to gab…
P/2025/3583
2025 Approved
92 Bassett Gardens, Isleworth, TW7 4QY
Erection of a single storey side and rear extension
P/2025/1640
2025 Approved
92 Bassett Gardens, Isleworth, TW7 4QY
Ground floor rear extension 6.00 metres deep, maximum height 2.95 metres, 2.95 metres hig…
PA/2025/0924
2024 Approved
32 Bassett Gardens, Isleworth, TW7 4QY
Erection of a first-floor rear extension and alteration to the side window.
P/2024/3249
2023 Refused
10 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Change of use of the existing detached outbuilding at the rear of the garden from an amen…
P/2023/3017
2023 Approved
62 BASSETT GARDENS, ISLEWORTH, TW7 4QY
Erection of single storey rear extension with three skylights to the house and render to…
P/2023/0215
2021 Approved
34 BASSETT GARDENS, ISLEWORTH, TW7 4QY
Ground floor rear extension 5.95 metres deep, maximum height 3.00 metres, 2.95 metres hig…
PA/2021/3083
2020 Approved
22 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Extension of the expiry date (within condition 1) of planning permission 00082/22/P4 for…
P/2020/3487
2020 Approved
10 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Erection of a two storey side extension and single storey rear extension to the house
P/2020/1656
2020 Approved
10 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Ground floor rear extension 6.00 metres, maximum height 3.89 metres, 2.95 metres high to…
PA/2020/1358
2020 Approved
10 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Ground floor rear extension 5.30 metres deep, maximum height 3.89 metres, 2.95 metres hig…
PA/2020/0933
2019 Approved
40 OSTERLEY AVENUE, ISLEWORTH, TW7 4QF
Variation of condition 3 (approved plans) to enable the living room of Flat 4 to be exten…
P/2019/4046
2019 Approved
88 BASSETT GARDENS, ISLEWORTH, TW7 4QY
Erection of a first floor rear extension to the house
P/2019/3520
2019 Approved
23 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Ground floor rear extension 4.0 metres deep, maximum height of 3.0 metres, 3.0 metres hig…
PA/2019/3358
2019 Approved
23 BASSETT GARDENS, ISLEWORTH, TW7 4QZ
Ground floor rear extension 4 metres deep, maximum height of 3 metres, 0 metres high to t…
PA/2019/2582
2019 Approved
40 OSTERLEY AVENUE, ISLEWORTH, TW7 4QF
Erection of a part single part two storey rear extension, part first floor side and rear…
P/2019/2087
2019 Refused
88 BASSETT GARDENS, ISLEWORTH, TW7 4QY
Erection of a first floor rear extension to the house
P/2019/0027
2018 Approved
32 BASSETT GARDENS, ISLEWORTH, TW7 4QY
Ground floor rear extension 6.0 metres deep, maximum height of 3.0 metres, 2.95 metres hi…
PA/2018/4552
2017 Approved
37A OSTERLEY AVENUE ISLEWORTH LONDON TW7 4QF
Details of refuse storage (condition 3) and hard and soft landscaping (condition 8) submi…
P/2017/4557
2017 Approved
37A OSTERLEY AVENUE ISLEWORTH LONDON TW7 4QF
Alterations to the roof design of the development, approved 29th November 2013 with refer…
P/2017/3749
2017 Approved
22 BASSETT GARDENS ISLEWORTH TW7 4QZ
Erection of a single storey rear extension to the house
P/2017/3914
2017 Refused
22 BASSETT GARDENS ISLEWORTH TW7 4QZ
Ground floor rear extension 6 metres deep, maximum height of 3.2 metres, 2.9 metres high…
PA/2017/1251
2017 Approved
26 BASSETT GARDENS ISLEWORTH TW7 4QY
Erection of a first floor rear extension to the house.
P/2017/0142
2016 Approved
37 OSTERLEY AVENUE ISLEWORTH TW7 4QF
Details submitted pursuant to condition 5 (Materials) of planning permission 00840/37/P7…
P/2016/4371
2016 Refused
26 BASSETT GARDENS ISLEWORTH TW7 4QY
Erection of a first floor rear extension and second floor rear extension incorporating th…
P/2016/4004
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

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