37 St Marys Grove,Chiswick,London,W4 3LN Data via plota.co.uk

P/2025/2959 - Lawful Development Certificate (Proposed) Approved

Proposal

Certificate of Lawfulness for change of use from a House in Multiple Occupation (Class 4) to a house (Class C3a). Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
2 Oct 2025
✓
Approved
17 Nov 2025
✗
Appeal dismissed
3 Jul 2026

Approved on 17 Nov 2025 · Last checked 11 Oct 2026

Documents 13

Decision & officer reports 2

PDF P-Delegated Report P-Delegated Report · 17 Nov 2025 View ↗ PDF DECLEUD P-Decision Notice · 17 Nov 2025 View ↗

Plans & drawings 9

PDF Location Plan P-Location Plan · 2 Oct 2025 View ↗ PDF Existing Block Plan P-Existing Site · 2 Oct 2025 View ↗ PDF Proposed Block Plan P-Proposed Site · 2 Oct 2025 View ↗ PDF Existing Elevations P-Existing Elevation · 2 Oct 2025 View ↗ PDF Existing Section P-Existing Sections · 2 Oct 2025 View ↗ PDF Existing Plans P-Existing Plans · 2 Oct 2025 View ↗ PDF Proposed Plans P-Proposed Plans · 2 Oct 2025 View ↗ PDF Proposed Section P-Proposed Sections · 2 Oct 2025 View ↗ PDF Proposed Elevations P-Proposed Elevation · 2 Oct 2025 View ↗

Application forms 1

PDF Redacted Application Form P-Planning Application Form · 2 Oct 2025 View ↗

Other documents 1

PDF Cover letter P-Supporting Information · 13 Oct 2025 View ↗

All documents on the council site ↗

Site constraints 6

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 Named permitted development rights are withdrawn here.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 ↗
Also on the record
National infrastructure project 1520 m away: Thames Tideway Tunnel; 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 listed building at the site · No scheduled monument at the site

Checked on 11 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 £1,815,000 in September 2025. Detached house, freehold.

15 September 2025£1,815,000

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 ratingG (1 out of 100), could reach C
PropertyDetached house, 8 habitable rooms
Built1900 to 1929
HeatingNo system present: electric heaters assumed
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in November 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 3LN
Received
2 Oct 2025
Validated
2 Oct 2025
Ward
Chiswick Riverside
Case officer
Show
Decision
GRANT
Decision date
17 Nov 2025
Appeal
Dismissed · 3 Jul 2026 · Written Representations · Inspectorate case 6005979 ↗
Applicant
Show

How this decision compares

Decided in 46 days from validation, 8 days faster than Hounslow's median of 54 for lawful development certificates. Approved, as 83% of lawful development certificates here are.

80%decided within 8 weeks
83%approved
445decided in the last year

Plota live figures for lawful development certificates decided by Hounslow in the last twelve months, from validation. Hounslow decision record →

Consultation & key dates

Consultation
2 Oct 2025
Statutory expiry
27 Nov 2025

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
63 Whitehall Park Road, Chiswick, London, W4 3NB
Erection of single storey rear and infill extension to house
P/2025/0694
2024 Refused
63 Whitehall Park Road, Chiswick, London, W4 3NB
Erection of single storey rear and infill extension.
P/2024/4252
2024 Refused
59 St Marys Grove, Chiswick, London, W4 3LW
Erection of a rear roof extension to the house.
P/2024/3403
2024 Approved
13 Gordon Road, Chiswick, London, W4 3LU
Ground floor side infill extension and rear extension.
P/2024/1853
2024 Approved
48 ST MARYS GROVE, CHISWICK, W4 3LW
Erection of a single storey side and rear infill extension and enlargement of the existin…
P/2024/1366
2023 Approved
73 WHITEHALL PARK ROAD, CHISWICK, LONDON, W4 3NB
Erection of a single storey rear extension and replacement of the existing side main entr…
P/2023/2433
2023 Refused
48 ST MARYS GROVE, CHISWICK, LONDON, W4 3LW
Erection of part two storey, part single storey side extension and single storey rear ext…
P/2023/2765
2023 Approved
59 ST MARYS GROVE, CHISWICK, LONDON, W4 3LW
Erection of a single storey rear infill extension and a front and rear basement extension…
P/2023/2015
2023 Withdrawn
48 ST MARYS GROVE, CHISWICK, W4 3LW
Erection of part two storey, part single storey side and rear extension including basemen…
P/2023/1488
2023 Approved
FLAT GROUND FLOOR 54 WHITEHALL PARK ROAD, CHISWICK, LONDON, W4 3NB
Erection of a wooden garden office as a temporary structure at the end of the rear garden
P/2023/1272
2022 Approved
7 GORDON ROAD, CHISWICK, W4 3LU
Works to a tree within a conservation area - Silver Birch to fell
P/2022/3499
2022 Approved
47 ST MARYS GROVE, CHISWICK, W4 3LN
Erection of a single storey rear extension with a flat roof
P/2022/2154
2022 Approved
16 ST MARYS GROVE, CHISWICK, W4 3LL
Erection of a single storey rear and basement extension
P/2022/2142
2021 Approved
51A ST MARYS GROVE, CHISWICK, W4 3LW
Erection of a single storey rear extension and associated works to ground floor flat
P/2021/4113
2021 Approved
10 GORDON ROAD, CHISWICK, LONDON, W4 3LU
Erection of a front lightwell and associated basement window within the house's front ele…
P/2021/3418
2021 Refused
51A ST MARYS GROVE, CHISWICK, LONDON, W4 3LW
Erection of a single storey rear/ side extension with roof alterations and associated wor…
P/2021/2471
2021 Approved
51A ST MARYS GROVE, CHISWICK, LONDON, W4 3LW
Erection of a single storey outbuilding in the rear garden of the flat.
P/2021/2470
2021 Approved
18A ST MARYS GROVE, CHISWICK, LONDON, W4 3LL
Erection of an enlargement to existing basement.
P/2021/2412
2021 Approved
69 WHITEHALL PARK ROAD, CHISWICK, W4 3NB
Erection of single storey rear and infill extension to house
P/2021/1342
2021 Approved
60 WHITEHALL PARK ROAD, CHISWICK, LONDON, W4 3NB
Single storey side infill and rear extension with roof lights to the house.
P/2021/0328
2016 Refused
75 WHITEHALL PARK ROAD CHISWICK LONDON W4 3NB
Erection of a part single storey rear extension to the house
P/2016/3047
2016 Refused
75 WHITEHALL PARK ROAD CHISWICK LONDON W4 3NB
Erection of a first floor rear infill and rear roof extension with a juilette balcony to…
P/2016/3044
2016 Refused
1 GORDON ROAD CHISWICK LONDON W4 3LU
Erection of a single storey rear extension and installation of a new side entrance door t…
P/2016/1062
2016 Approved
57A ST MARYS GROVE CHISWICK LONDON W4 3LW
Formation of basement level below existing flat incorporating a front and rear lightwell
P/2016/2605
2016 Approved
32 ST MARY'S GROVE CHISWICK LONDON W4 3LN
Erection of a single storey rear extension and a part first floor rear extension to the h…
P/2016/0295
Hounslow
Planning Authority Score
2.1/10
Poor
#268 of 296 councils
Relevant to this application:
Change of use

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.