17 Crowntree Close, Isleworth, TW7 5PF Data via plota.co.uk

P/2026/2151 - Householder Applications REGISTERED: Under Assessment
Extensions & alterations

Proposal

Erection of a side roof extension with three roof windows on the other side of the house Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Validated
23 Jul 2026
✓
Received
24 Jul 2026
Decision
Expected by 17 Sept 2026

This application is under consideration - no decision has been issued yet. Plota predicted a decision around 14 Sept 2026; it is now day 53. The consultation period closed on 21 Aug 2026.

Documents 7

Statements & assessments 2

PDF Design Access and Heritage Statement - 17 Crowntree Close.pdf P-Design and Access Statement · 22 Jul 2026 View ↗ PDF Reasonable Exception Statement - 17 Crowntree Close Isleworth TW7 5PF.pdf P-Published Fire Safety · 22 Jul 2026 View ↗

Plans & drawings 3

PDF with elevations and sections P-Existing Plans · 23 Jul 2026 View ↗ PDF with sections P-Proposed Elevation · 23 Jul 2026 View ↗ PDF LocationPlan.pdf P-Location Plan · 22 Jul 2026 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 22 Jul 2026 View ↗

Other documents 1

PDF PLA-02 - 17 Crowntree Close Isleworth TW7 5PF.pdf P-Proposed Plans · 22 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 6

Osterley Park conservation area
Also Osterley Park. 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 Named permitted development rights are withdrawn here.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.
Archaeological priority area
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
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
Inside the Hounslow built-up area; Metropolitan Open Land 43 m away.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building at the site

Checked on 11 September 2026. Historic England, the Environment Agency, Natural England 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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Important details

Council
Hounslow
Application type
Householder Applications
Postcode
TW7 5PF
Received
24 Jul 2026
Validated
23 Jul 2026
Ward
Osterley & Spring Grove
Case officer
Show
Applicant
Show

Decision outlook

Day 53, past Hounslow's usual 50 days for extensions. 96% are decided within thirteen weeks, so most likely by 22 Oct 2026.

Day 533 days to the 56-day target
82%decided within 8 weeks
83%approved
767decided 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
24 Jul 2026
Comments by
21 Aug 2026
Site or press notice
31 Jul 2026
Statutory expiry
17 Sept 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
Wyke Green Estate, Isleworth, TW7 5PE
Works to trees in a Conservation Area. T1 Crown lift to 5 metres. T2 Silver Birch. Crown…
P/2025/3083
2025 Withdrawn
1 Wyke Close, Isleworth, TW7 5PE
Please find the proposed work to be carried out in Wyke Close and the surrounding area T1…
P/2025/3031
2025 Approved
14 Wyke Close, Isleworth, TW7 5PE
Erection of a single storey rear extension to the house
P/2025/0973
2023 Refused
3 WYKE CLOSE, ISLEWORTH, TW7 5PE
Felling of Indian Bean Tree under Tree Preservation Order number 64.
P/2023/2940
2023 Approved
3 CROWNTREE CLOSE, ISLEWORTH, TW7 5PF
Work to trees within conservation area- Apple tree: Reduce all aspects of crown back to p…
P/2023/1371
2022 Approved
15 WYKE CLOSE, ISLEWORTH, TW7 5PE
Erection of ground floor rear extension to the house
P/2022/3555
2022 Approved
WYKE CLOSE, ISLEWORTH, TW7 5PE
Works on the trees within TPO 64 and TPO 167 and the Conservation Area. T3: Blue Atlas Ce…
P/2022/3474
2022 Approved
1 WYKE CLOSE, ISLEWORTH, TW7 5PE
Works to a tree within a conservation area - Sycamore Tree to prune up to 1.5m
P/2022/2047
2022 Approved
185 SYON LANE, ISLEWORTH, TW7 5PU
Erection of a rear roof extension with two front roof windows.
P/2022/1009
2022 Refused
185 SYON LANE, ISLEWORTH, TW7 5PU
Erection of a rear roof extension with two front roof windows
P/2022/0290
2021 Withdrawn
185 SYON LANE, ISLEWORTH, TW7 5PU
Dormer Loft Extension
P/2021/3448
2020 Approved
6 STAGS WAY, ISLEWORTH, TW7 5PG
Replacement of garage door with window and installation of a full length window inside th…
P/2020/3172
2020 Approved
50 STAGS WAY, ISLEWORTH, TW7 5PQ
Reduce crown to Robinia tree (T1) by 1m in rear garden in conservation area.
P/2020/2530
2019 Approved
49 STAGS WAY, ISLEWORTH, TW7 5PQ
Variation of condition 2 to infill the single storey rear extension following planning pe…
P/2019/2698
2019 Refused
185 SYON LANE, ISLEWORTH, TW7 5PU
Erection of a single storey rear extension
P/2019/1820
2019 Approved
11 CROWNTREE CLOSE, ISLEWORTH, TW7 5PF
Erection of a single storey rear extension and the conversion of the garage to a habitabl…
P/2019/1145
2019 Approved
1 WYKE CLOSE, ISLEWORTH, TW7 5PE
Conversion of garage to habitable room and insertion of two roof lights into the roof of…
P/2019/0748
2019 Approved
49 STAGS WAY, ISLEWORTH, TW7 5PQ
Erection of a single storey rear extension incorporating conversion of garage into a habi…
P/2019/0497
2018 Approved
STAGS WAY, ISLEWORTH, TW7 5PG
Works to trees within TPO 64 - grass area side of 7 Stags Way (TG1) - Lime x 1, Cotoneast…
P/2018/4369
2018 Refused
11 CROWNTREE CLOSE, ISLEWORTH, TW7 5PF
Erection of a single storey rear extension and a rear roof extension
P/2018/2876
2017 Approved
WYKE CLOSE ISLEWORTH LONDON TW7 5PE
Works to trees within tree preservation order 64 - Blue Atlas Cedar (T33) to shorten the…
P/2017/3489
2016 Approved
7 STAGS WAY ISLEWORTH TW7 5PG
Erection of a single storey side and rear extensions and a rear roof extension incorporat…
P/2016/4050
2016 Approved
49 STAGS WAY ISLEWORTH TW7 5PQ
Works to a tree an Oak tree (T1) involving crown reduction by 25% (2.5m) and removal of a…
P/2016/3229
2016 Approved
173 SYON LANE ISLEWORTH TW7 5PZ
Erection of a single storey rear extension to the house
P/2016/1697
2016 Approved
173 SYON LANE ISLEWORTH LONDON TW7 5PZ
Ground floor rear extension 4.500m deep, 2.800m high to the eaves with the maximum height…
PA/2016/1222
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