375 Flat Basement,Chiswick High Road,Chiswick,London,W4 4AG Data via plota.co.uk

P/2026/1997 - PF-Full Applications REGISTERED: Under Assessment
DemolitionExtensions & alterations

Proposal

Demolition of existing single-storey rear infill extension and erection of replacement single-storey rear infill extension to the existing basement flat. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
6 Jul 2026
✓
Validated
9 Sept 2026
Decision
Expected by 4 Nov 2026

Under consideration

No decision has been issued yet. Plota predicts a decision between 4 Nov 2026 and 11 Nov 2026, from Hounslow's recent demolitions.

The consultation period closed on 9 Oct 2026.

Documents 11

Statements & assessments 2

PDF P-Planning Statement P-Planning Statement · 8 Jul 2026 View ↗ PDF Fire Exemption Statement.pdf P-Published Fire Safety · 6 Jul 2026 View ↗

Plans & drawings 6

PDF Fire plan P-Published Fire Safety · 9 Sept 2026 View ↗ PDF LocationPlan.pdf P-Location Plan · 6 Jul 2026 View ↗ PDF Prop ground and roof plans P-Proposed Plans · 6 Jul 2026 View ↗ PDF 375B Chiswick High Road Chiswick London W4 4AG-PROP (2).pdf P-Proposed Elevation · 6 Jul 2026 View ↗ PDF Exis ground and roof plans P-Existing Elevation · 6 Jul 2026 View ↗ PDF 375B Chiswick High Road Chiswick London W4 4AG-EXT (2).pdf P-Existing Elevation · 6 Jul 2026 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 6 Jul 2026 View ↗

Other documents 2

PDF P-Published Fire Safety P-Published Fire Safety · 15 Jul 2026 View ↗ PDF P-Published Fire Safety P-Published Fire Safety · 15 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 8

Wellesley Road conservation area
Also Wellesley Road. 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 Named permitted development rights are withdrawn here.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.
Archaeological priority area: The line of the main Roman Road from Londinium to Silchester and the West
An assessment or field evaluation may be asked for before ground works.
The council or Historic England considers archaeology likely here. A desk-based assessment, and sometimes trial trenching, can be asked for with the application.
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 ↗
Local nature reserve 73 m away: Gunnersbury Triangle
Work nearby can need a habitats assessment.
Harm to a protected site is only accepted where there is no alternative and an overriding public interest.
Also on the record
National infrastructure project 1180 m away: Thames Tideway Tunnel; Inside the Hounslow built-up area; Public transport access: PTAL 4 (good), 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.

Building

Floor area104 m² (1,119 sq ft)
Energy ratingC (78 out of 100), could reach B
PropertyFlat, 3 habitable rooms
BuiltBefore 1900
HeatingBoiler and radiators, mains gas
WallsSolid brick, as built, no insulation (assumed)

From the energy performance certificate lodged in July 2026, 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
PF-Full Applications
Postcode
W4 4AG
Received
6 Jul 2026
Validated
9 Sept 2026
Ward
Chiswick Gunnersbury
Case officer
Show
Applicant
Show

Decision outlook

Day 39 of the 56-day target. Hounslow usually decides demolitions by day 56.

Day 3917 days to the 56-day target
52%decided within 8 weeks
81%approved
109decided in the last year

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

Consultation & key dates

Consultation
8 Jul 2026
Comments by
9 Oct 2026
Site or press notice
18 Sept 2026
Statutory expiry
4 Nov 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
3 Burlington Road, Chiswick, London, W4 4BQ
Works to trees in a conservation area. T1 Cherry tree (Prunus) in front garden. Fell to g…
P/2025/3348
2025 Approved
3 Burlington Road, Chiswick, London, W4 4BQ
Works to three trees within a conservation area. Rear Garden. T3 Cherry (Prunus). Reduce…
P/2025/3307
2025 Withdrawn
Pavement Outside 1 Burlington Lane, Chiswick, London, W4 2RR
Works to London Plane (T3) within a conservation area: - Crown reduce by 1.5 metres in la…
P/2025/3119
2025 Approved
8 Burlington Road, Chiswick, London, W4 4BG
Erection of a single storey and part first floor rear extension and a two storey side ext…
P/2025/1515
2025 Refused
8 Burlington Road, Chiswick, London, W4 4BG
Erection of a two storey side extension, first floor rear extension, single storey rear e…
P/2025/0454
2024 Approved
7 Burlington Road, Chiswick, London, W4 4BQ
Works to tree within a conservation area: Felling of silver Birch tree in rear garden.
P/2024/4167
2024 Approved
4 Marlborough Road, Chiswick, London, W4 4ET
Works to a tree in a conservation area: T1 Sycamore (Back right of car park ) - Reduce ba…
P/2024/2753
2023 Approved
8 BURLINGTON ROAD, CHISWICK, W4 4BG
Demolition of existing single storey rear extension and outbuildings. Erection of a singl…
P/2023/2310
2023 Approved
369-369A CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 4AG
Works to trees within a Conservation Area: Sycamore (T1) - Reduce to clear the neighbouri…
P/2023/0462
2022 Refused
OUTSIDE 548 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 5RG
Installation of a multifunctional communication hub including defibrillator and advertise…
P/2022/4004
2022 Refused
OUTSIDE 548 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 5RG
00248/O/S548/P2 Installation of a multifunctional communication hub including defibrillat…
P/2022/4003
2022 Approved
520 - 530 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 5RG
Reduction of existing vehicle crossover carriageway surfacing height providing access to…
P/2022/2751
2022 Approved
377 CHISWICK HIGH ROAD, CHISWICK, W4 4AG
Works to a Lime Tree (T1) at front of property within a conservation area. Reducing all a…
P/2022/3294
2021 Approved
GARAGE BLOCK WEST OF GUNNERSBURY CLOSE CHISWICK HIGH ROAD, CHISWICK, W4 4AH
Erection of a four storey residential block comprising 12 flats with three car parking sp…
P/2021/3807
2021 Approved
4 MARLBOROUGH ROAD, CHISWICK, W4 4ET
Works to one tree. T1- White Poplar, to reduce in height and reduce the shape by 8m.
P/2021/4186
2021 Approved
361-365 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 4HS
Change of use from office to residential comprising 34 residential units with 8 studios a…
PA/2021/2728
2020 Approved
520-530 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 5RG
Variation of condition 2 (approved plans) to allow increase in height from the approved a…
P/2020/3955
2020 Approved
540 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 5RG
Subdivision into two units with alterations to the front includng additional entrance doo…
P/2020/4195
2021 Approved
4 MARLBOROUGH ROAD, CHISWICK, LONDON, W4 4ET
Works to trees in a conservation area - fell two Leylandi Cypress tress (T1 and T2) in th…
P/2021/0541
2020 Approved
367 CHISWICK HIGH ROAD, CHISWICK, LONDON, W4 4AG
Works to eight trees on site. T1, T2, T3 Sycamores, T4 Field Maple, T5 False Acacia, all…
P/2020/4004
2016 Approved
367 CHISWICK HIGH ROAD CHISWICK LONDON W4 4AG
Installation of 2 staircase and 2 new doors to the east elevation and 1 new door to the w…
P/2016/3111
2016 Approved
7 BURLINGTON ROAD CHISWICK LONDON W4 4BQ
Works to trees within a conservation area T1- Mulberry, to remove damaged tree T2 - Hawth…
P/2016/2204
2016 Approved
367 CHISWICK HIGH ROAD CHISWICK LONDON W4 4AG
Prior notification for the change of use of the ground floor from offices (B1 use) to pro…
PA/2016/1431
2016 Withdrawn
15 BURLINGTON ROAD CHISWICK W4 4BQ
Erection of an outbuilding in the rear garden.
P/2016/1742
2016 Withdrawn
367 CHISWICK HIGH ROAD CHISWICK LONDON W4 4AG
Change of use of the ground floor from B1(a) Office Use to create four self contained stu…
P/2016/0092
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

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.