258 Ash Grove,Hounslow,TW5 9DY Data via plota.co.uk

PA/2025/3670 - Prior Approval Larger Home Extension Refused

Proposal

Ground floor rear extension 6.00 metres deep, maximum height 3.40 metres, 2.90 metres high to the eaves. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
10 Dec 2025
✗
Refused
9 Jan 2026
Appeal
Not lodged

Refused on 9 Jan 2026 · Last checked 4 Oct 2026

Documents 5

Decision & officer reports 2

PDF P-Delegated Report P-Delegated Report · 9 Jan 2026 View ↗ PDF PANAR P-Decision Notice · 9 Jan 2026 View ↗

Plans & drawings 2

PDF P-Location Plan P-Location Plan · 10 Dec 2025 View ↗ PDF P-All in one Plans Proposed P-All in one Plans Proposed · 10 Dec 2025 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 10 Dec 2025 View ↗

All documents on the council site ↗

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 Named permitted development rights are withdrawn here.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 824 m away: M4 Junctions 3 to 12 Smart Motorway
The site is 824 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, 493 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 1a (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 2 November 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 3

Last sold for £550,000 in August 2025. Terraced house, freehold.

29 August 2025£550,000
31 January 2013£333,500
9 July 2002£210,000

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

Building

Floor area94 m² (1,012 sq ft)
Energy ratingD (57 out of 100), could reach C
PropertyEnd-terrace house, 4 habitable rooms
Built1930 to 1949
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in June 2017, the latest held for this property. The building may have changed since. View the certificate

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Important details

Council
Hounslow
Application type
Prior Approval Larger Home Extension
Postcode
TW5 9DY
Received
10 Dec 2025
Validated
10 Dec 2025
Ward
Heston West
Case officer
Show
Decision
PRIOR APPROVAL NEEDED AND REFUSED
Decision date
9 Jan 2026
Applicant
Show

How this decision compares

Decided in 30 days from validation, 10 days faster than Hounslow's median of 40 for prior approvals. Refused, as 22% of prior approvals here are.

96%decided within 8 weeks
78%approved
274decided in the last year

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

Consultation & key dates

Consultation
10 Dec 2025
Comments by
10 Dec 2025
Statutory expiry
21 Jan 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
150 Ash Grove, Hounslow, Middlesex, TW5 9DR
Erection of a part two storey, part single storey side and rear extension.
P/2025/3514
2025 Approved
238 Ash Grove, Hounslow, TW5 9DY
Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 2.90 metres…
PA/2025/1246
2025
153 Ash Grove, Hounslow, TW5 9DX
Creation of vehicular access to the house
P/2025/0031
2024 Withdrawn
21 Ash Grove, Hounslow, TW5 9DU
Erection of single storey ground floor rear extension to the house.
P/2024/2865
2024 Approved
13 LYNMOUTH GARDENS, HOUNSLOW, TW5 9DZ
Erection of part first floor rear extension to the house
P/2024/0270
2024 Refused
2 LYNMOUTH GARDENS, HOUNSLOW, TW5 9DZ
Erection of a part single, part two storey rear extension
P/2024/0164
2023 Approved
5 ASH GROVE, HOUNSLOW, TW5 9DU
Ground floor rear extension 6.00 metres deep, maximum height of 4.00 metres, 3.00 metres…
PA/2023/3889
2023 Approved
5 ASH GROVE, HOUNSLOW, TW5 9DU
Ground floor rear extension 6.00 metres deep, maximum height of 4.00 metres, 3.00 metres…
PA/2023/3372
2023 Approved
2 LYNMOUTH GARDENS, HOUNSLOW, TW5 9DZ
Ground floor rear extension 6.00 metres deep, maximum height of 3.75 metres, 2.52 metres…
PA/2023/2559
2023 Approved
2 LYNMOUTH GARDENS, HOUNSLOW, TW5 9DZ
Ground floor rear extension 6.00 meters deep, maximum height of 3.75 metres, 2.52 metres…
PA/2023/1542
2022 Approved
27 ASH GROVE, HOUNSLOW, TW5 9DU
Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 2.75 metres hig…
PA/2022/4027
2022 Refused
21 ASH GROVE, HOUNSLOW, TW5 9DU
Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 2.70 metres…
PA/2022/1381
2021 Approved
19 ASH GROVE, HOUNSLOW, TW5 9DU
Ground floor rear extension 6 metres deep, maximum height of 3 metres, 2.7 metres high to…
PA/2021/4489
2021 Refused
21 ASH GROVE, HOUNSLOW, TW5 9DU
Ground floor rear extension 6 metres deep, maximum height of 3 metres, 2.7 metres high to…
PA/2021/4491
2021 Approved
2 ASH GROVE, HOUNSLOW, TW5 9DR
Erection of a part first floor rear extension to the house
P/2021/3110
2020 Approved
11 LYNMOUTH GARDENS, HOUNSLOW, TW5 9DZ
Erection of a first floor side extension to the house
P/2020/2786
2018 Approved
4 LYNMOUTH GARDENS, HOUNSLOW, TW5 9DZ
Ground floor rear extension 6 metres deep, maximum height of 3.30 metres, 3 metres high t…
PA/2018/3422
2018 Withdrawn
24 ASH GROVE HOUNSLOW LONDON TW5 9DR
Converson of the house into two flats.
P/2018/0754
2018 Approved
8 LYNMOUTH GARDENS HOUNSLOW LONDON TW5 9DZ
Ground floor rear extension 6m deep, 3m high to the eaves with the maximum height of 4m.
PA/2018/0345
2017 Approved
24 ASH GROVE HOUNSLOW TW5 9DR
Erection of a single storey rear extension with two domed roof windows to the house
P/2017/5094
2016 Approved
81 SPRINGWELL ROAD HOUNSLOW TW5 9BW
Ground floor rear extension 6 metres deep, 2.65 metres high to eaves with a maximum heigh…
PA/2016/2040
2016 Approved
79 SPRINGWELL ROAD HOUNSLOW TW5 9BW
Ground floor rear extension 6 metres deep, maximum height of 3 metres, 2.5 metres high to…
PA/2016/2092
2016 Approved
143 ASH GROVE HOUNSLOW LONDON TW5 9DX
Ground floor rear extension 6m deep, 2.95m high to the eaves with the maximum height of 2…
PA/2016/1322
2016 Refused
230 ASH GROVE HOUNSLOW LONDON TW5 9DT
Ground floor rear extension 5 metres deep, maximum height of 2.50 metres, 2.90 metres hig…
PA/2016/1138
2016 Refused
230 ASH GROVE HOUNSLOW LONDON TW5 9DT
Ground floor rear extension 6 metres deep, maximum height of 3.125 metres, 2.6 metres hig…
PA/2016/0292
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.