144 Ash Grove,Hounslow,TW5 9DS Data via plota.co.uk

P/2026/1377 - Lawful Development Certificate (Proposed) Approved

Proposal

Certificate of lawfulness for the proposed erection of a rear roof extension with an additional front roof window to the house. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
7 May 2026
✓
Approved
5 Jun 2026

Approved on 5 Jun 2026 · Last checked 19 Sept 2026

Site constraints 5

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 Named permitted development rights are withdrawn here.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 ↗
National infrastructure project 592 m away: M4 Junctions 3 to 12 Smart Motorway
The site is 592 m from the project boundary. Highway, decided. The project page says whether consent was granted. Also within 2 km: Expansion of Heathrow Airport (Third Runway) (at pre-application, 686 m).
Nationally significant infrastructure projects (power stations, electricity lines, pipelines, major roads and railways, harbours, airports and reservoirs) are consented by a Secretary of State under the Planning Act 2008, after an examination by the Planning Inspectorate, rather than by the council. The boundary is the one the Inspectorate consults on and can change as the scheme does. Projects are shown within 2 km of the site.
Planning Inspectorate project page ↗
Also on the record
Inside the Hounslow built-up area; Public transport access: PTAL 1b (very poor), TfL 2023, for the 100 m square.
Not affected
Outside flood zones 2 and 3 · Not green belt · No listed building 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 £77,000 in July 1996. Semi-detached house, freehold.

19 July 1996£77,000

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

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Important details

Council
Hounslow
Application type
Lawful Development Certificate (Proposed)
Postcode
TW5 9DS
Received
7 May 2026
Validated
7 May 2026
Ward
Heston West
Case officer
Show
Decision
Grant
Decision date
5 Jun 2026
Applicant
Show

How this decision compares

Decided in 29 days from validation, 25 days faster than Hounslow's median of 54 for extensions. Approved, as 81% of extensions here are.

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 →

Public comments

No public comments yet.

Read the comments on the council site ↗

Consultation & key dates

Consultation
7 May 2026
Statutory expiry
2 Jul 2026
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

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