42 Elmwood Road, Chiswick, London, W4 3DZ Data via plota.co.uk

P/2026/2327 - Lawful Development Certificate (Proposed) Approved

Proposal

Certificate of lawfulness for the proposed erection of a rear roof extension with alterations to form a gable end and four windows to the front roof of the house. Data via plota.co.uk

View original council record ↗Last checked

Application progress

✓
Received
12 Aug 2026
✓
Approved
6 Oct 2026

Approved on 6 Oct 2026 · Last checked 7 Oct 2026

Site constraints 8

Flood zone 3, rivers and sea
High chance: a 1 in 100 or greater annual chance from rivers, or 1 in 200 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 ↗
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 Named permitted development rights are withdrawn here.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 ↗
4 listed buildings within 150 m
Nearest: Boundary wall to east side and rear of Little Sutton Cottage and to rear and west side of Sutton Close, Grade II, 39 m away · 4 Grade II
The site itself is not listed. Listed building consent is needed for work that affects the special interest of a listed building, inside or out, on top of planning permission. Setting can be a consideration for buildings nearby; there is no fixed radius.
Show all 4 with distances
Historic England ↗
Also on the record
National infrastructure project 1197 m away: Thames Tideway Tunnel; Conservation area 80 m away: Wellesley Road; Inside the Hounslow built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square.
Not affected
Not green belt · No scheduled monument 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 2

Last sold for £1,370,000 in March 2025. Semi-detached house, freehold.

28 March 2025£1,370,000
28 January 2005£642,000

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

Building

Floor area181 m² (1,948 sq ft)
Energy ratingD (56 out of 100), could reach B
PropertySemi-detached house, 7 habitable rooms
Built1900 to 1929
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in February 2024, 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
Lawful Development Certificate (Proposed)
Postcode
W4 3DZ
Received
12 Aug 2026
Validated
12 Aug 2026
Ward
Chiswick Riverside
Case officer
Show
Decision
GRANT
Decision date
6 Oct 2026
Applicant
Show

How this decision compares

Decided in 55 days from validation, about the council's usual 54 days. Approved, as 81% of extensions here are.

78%decided within 8 weeks
81%approved
920decided 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
12 Aug 2026
Statutory expiry
7 Oct 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

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.