36 Napier Road,Isleworth,TW7 7HP Data via plota.co.uk

Approved P/2026/1897 - Lawful Development Certificate (Proposed)
Extensions & alterations
Council
Hounslow 2.1/10
Date received
26 Jun 2026
Date validated
26 Jun 2026
Decision date
19 Aug 2026
Postcode
TW7 7HP
Type
Lawful Development Certificate (Proposed)

Description

Certificate of lawfulness for the proposed erection of a rear roof extension. Data via plota.co.uk

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Last checked

How this decision compares

Decided in 54 days from validation, 4 days slower than Hounslow's median of 50 for extensions. Approved, as 83% of extensions here are.

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 →

Site constraints 7

Flood zone 2, rivers and sea
Medium chance: between a 1 in 100 and 1 in 1,000 annual chance from rivers, or 1 in 200 to 1 in 1,000 from the sea. Any development here needs a flood risk assessment. Defences are not counted.
The Environment Agency flood map for planning. Homes in zone 3 must also pass the sequential test. Surface water flooding is a separate map.
Flood map ↗
Isleworth Riverside conservation area
Also Isleworth Riverside. 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 Named permitted development rights are withdrawn here.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 ↗
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
Inside the Hounslow built-up area; Metropolitan Open Land 54 m away.
Not affected
Not green belt · No listed building at the site · No scheduled monument 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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Other new applications on this street

28 May 2026Approved

40 Napier Road,Isleworth,TW7 7HP

Works to trees in a conservation area. T1 Olive. Reduce overhanging branches to...

P/2026/1582

Nearby new applications

7 Sept 2026Pending

9 Martineau Drive Twickenham TW1 1PZ

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PA26/3092
8 Sept 2026Pending

20 Chalmers Way Twickenham TW1 1QG

T1 False Acacia - Fell to ground level and poison stump to grind in 6 -12 month ...

PA26/3103
2 Sept 2026Pending

22 Chalmers Way Twickenham Middlesex TW1 1QG

T1 – Cedar Remove major deadwood (=25mm diameter). Prune back from property to

PA26/3037
2 Sept 2026Pending

16 Lynton Close, Isleworth, TW7 7ET

Erection of a two storey residential house with associated car parking, landscap...

P/2026/2426
1 Sept 2026Pending

36 Napier Road,Isleworth,TW7 7HP

Erection of a rear roof extension.

P/2026/2418
21 Aug 2026

7 Steele Road,Isleworth,TW7 7HL

Erection of a first floor rear extension and a rear roof extension.

P/2026/2409

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
39 Napier Road, Isleworth, TW7 7HP
Works to trees in a Conservation Area. Cherry (Prunus species) T1. Fell to ground level
P/2025/3157
2024 Approved
39 Steele Road, Isleworth, TW7 7HL
Retrospective planning application for the erection of a rear roof extension with two fro…
P/2024/4137
2024 Approved
40 Steele Road, Isleworth, TW7 7HN
Works to tree in a conservation area: T1 Apple - Rear garden, northern side boundary - Re…
P/2024/4233
2024
39 Steele Road, Isleworth, TW7 7HL
Erection of a rear roof extension and the installation of two front roof lights.
P/2024/4052
2024 Approved
1 Napier Road, Isleworth, TW7 7HP
Erection of a rear roof extension with two front windows to the house.
P/2024/2899
2024 Approved
33 EVE ROAD, ISLEWORTH, TW7 7HS
Erection of single storey rear extension
P/2024/0287
2023 Approved
38 NAPIER ROAD, ISLEWORTH, TW7 7HP
Erection of a single storey rear extension.
P/2023/2612
2023 Refused
1 NAPIER ROAD, ISLEWORTH, TW7 7HP
Erection of a single storey rear and part single, part two storey side infill extension a…
P/2023/1447
2022 Approved
1 NAPIER ROAD, ISLEWORTH, TW7 7HP
Erection of a single storey rear and side infill extension, and rear roof extension.
P/2022/1764
2023 Approved
42 EVE ROAD, ISLEWORTH, TW7 7HS
Erection of a single storey side and rear extension to the house.
P/2023/0212
2022 Approved
GROUND FLOOR FLAT 41 EVE ROAD, ISLEWORTH, TW7 7HS
Erection of a single storey side and rear extension with associated internal alterations
P/2022/1120
2022 Approved
40 EVE ROAD, ISLEWORTH, TW7 7HS
Works in a Conservation Area: T1 Robinia - repollard back to previous pollard points. Cur…
P/2022/0558
2021 Approved
36 EVE ROAD, ISLEWORTH, TW7 7HS
Erection of single storey side rear wraparound extension
P/2021/4971
2022 Refused
GROUND FLOOR FLAT 41 EVE ROAD, ISLEWORTH, TW7 7HS
Erection of a single storey side and rear extension with associated internal alterations
P/2022/0400
2021 Approved
44 NAPIER ROAD, ISLEWORTH, TW7 7HP
Erection of a detached outbuilding in the garden for use as an office/storage/garage to t…
P/2021/4895
2021 Refused
41 EVE ROAD, ISLEWORTH, TW7 7HS
Erection of a single storey rear and side wrap around extension with associated internal…
P/2021/4138
2021 Approved
31 EVE ROAD, ISLEWORTH, TW7 7HS
Demolition of existing rear extension and erection of a single storey rear extension.
P/2021/2636
2021 Refused
60 DAWES AVENUE, ISLEWORTH, TW7 7JS
Removal of conditions 3 and 4 (restricting 'permitted development' rights) of planning pe…
P/2021/2038
2021 Approved
35 NAPIER ROAD, ISLEWORTH, TW7 7HP
Erection of a single storey rear extension to the house
P/2021/1733
2021 Approved
46 NAPIER ROAD, ISLEWORTH, TW7 7HP
Erection of part two storey, part single storey side extension and first floor side exten…
P/2021/0566
2016 Approved
5 NAPIER ROAD ISLEWORTH TW7 7HP
Erection of single storey rear infill extension to the house
P/2016/3481
2016 Approved
112 WORPLE ROAD ISLEWORTH TW7 7HU
Erection of a single storey rear extension to the house.
P/2016/2452
2016 Approved
37 EVE ROAD ISLEWORTH TW7 7HS
Erection of a single storey side infill and part rear extension to the house
P/2016/2230
2016 Refused
5 NAPIER ROAD ISLEWORTH LONDON TW7 7HP
Erection of single storey rear infill extension to the house
P/2016/0247
2016 Refused
37 EVE ROAD ISLEWORTH LONDON TW7 7HS
Erection of a single storey rear infill extension to the house
P/2016/0805
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