Grandfield Court,Park Road,Chiswick,London,W4 3EP Data via plota.co.uk

P/2026/1969 - PF-Full Applications REGISTERED: Under Assessment
Extensions & alterationsNew homes

Proposal

Erection of an additional storey at roof level to the existing building to provide five self-contained residential flats with associated private amenity spaces, eight front-facing roof windows, Juliet balconies and waste, recycling and cycle storage. Data via plota.co.uk

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View original council record ↗Last checked

Application progress

✓
Received
2 Jul 2026
Decision
Expected by 27 Aug 2026

Under consideration

No decision has been issued yet. Plota predicted a decision around 9 Oct 2026; it is now day 99.

The consultation period closed on 6 Aug 2026.

Documents 9

Statements & assessments 6

PDF BNG Exemption Statement.pdf P-Biodiversity credits details · 2 Jul 2026 View ↗ PDF BRE Daylight Sunlight (Neighbouring) - Grandfield Court Park Road Chiswick W4 3EP.pdf P-Daylight or sunlight assessment · 2 Jul 2026 View ↗ PDF Energy Statement - Grandfield Court.pdf P-Statement Other · 2 Jul 2026 View ↗ PDF Flood Risk Assessment - Grandfield Court.pdf P-Flood Risk Assessment · 2 Jul 2026 View ↗ PDF Grandfield Court - Design and Access and Heritage Statement.pdf P-Design and Access Statement · 2 Jul 2026 View ↗ PDF Grandfiled Court - Fire Statement.pdf P-Published Fire Safety · 2 Jul 2026 View ↗

Plans & drawings 2

PDF 0000_Site Location Plan.pdf P-Location Plan · 2 Jul 2026 View ↗ PDF Existing and Proposed Drawings.pdf P-All in one Plans Proposed · 2 Jul 2026 View ↗

Application forms 1

PDF ApplicationFormRedacted.pdf P-Planning Application Form · 2 Jul 2026 View ↗

All documents on the council site ↗

Site constraints 11

Chiswick House conservation area
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.
Council document ↗
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 Named permitted development rights are withdrawn here.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.
In flood zones plus climate change
Inside the extent flood zones 2 and 3 could reach with climate change: the Central allowance for the 2080s on rivers, the Upper End allowance for sea level rise to 2125. From the sea. Defences are not counted.
The Environment Agency flood map for planning. Councils use it to decide when a flood risk assessment and the sequential test are needed. It is indicative and does not show whether a particular property will flood.
Flood map ↗
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 ↗
Registered park or garden 28 m away: Chiswick House
Its setting is a consideration for work nearby.
Registered parks and gardens, battlefields, world heritage sites and protected wrecks are designated heritage assets: harm needs clear and convincing justification.
Historic England ↗
National infrastructure project 577 m away: Thames Tideway Tunnel
The site is 577 m from the project boundary. Waste water treatment, decided. The project page says whether consent was granted.
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 ↗
Habitat network: Network Enhancement Zone 2
Where habitat is joined up enough to work as a network. Context, not a constraint on its own.
Also on the record
1 listed building within 150 m; Inside the Hounslow built-up area; Public transport access: PTAL 2 (poor), TfL 2023, for the 100 m square; Metropolitan Open Land 28 m away.
Not affected
Outside flood zones 2 and 3 · 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.

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Other new applications on this street

6 Aug 2026Refused

Corner of Great West Road/Park Road, Chiswick, London, W4 3EP

Prior Approval notification for the installation of a 17.5m monopole with six an...

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Nearby new applications

30 Sept 2026Pending

19 Sutherland Road, Chiswick, London, W4 2QR

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6 Oct 2026Pending

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Works to four trees within a conservation area. Yew (T1) - Crown reduction by up...

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5 Oct 2026Pending

13 Eastbourne Road, Chiswick, London W4 3EB

Works to a row of Conifer Leylandii in rear garden within a conservation area. ...

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5 Oct 2026Pending

23 Heathfield Gardens, Chiswick, London, W4 4JU

Works to tree within a conservation area, Lime (T1) x1 - Fell.

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1 Oct 2026Pending

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Important details

Council
Hounslow
Application type
PF-Full Applications
Postcode
W4 3EP
Received
2 Jul 2026
Validated
2 Jul 2026
Ward
Chiswick Homefields|Chiswick Riverside
Case officer
Show
Applicant
Show
Freehold owner
Show

Decision outlook

Day 99, past the statutory target. 95% of extensions in Hounslow are decided within thirteen weeks; extensions of time are common, and the council need not decide on the day. Last seen undecided on 7 Oct 2026.

Day 9943 days past the 56-day target
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
6 Jul 2026
Comments by
6 Aug 2026
Site or press notice
10 Jul 2026
Statutory expiry
27 Aug 2026

Historical activity at this location

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

Within ~100m

Nearby activity

2025 Approved
35 Park Road, Chiswick, London, W4 3EY
Felling of a Eucalyptus tree in a Conservation Area (5 day dangerous tree)
P/2025/3792
2025 Approved
43 Park Road, Chiswick, London, W4 3EY
Erection of a single storey rear extension with roof lantern, a rear roof extension and a…
P/2025/1220
2025 Approved
1 Park Road North, Chiswick W4 4QE
Works to tree within a conservation area: G1 (Elderberry) - felling.
P/2025/0761
2024 Withdrawn
22 Flat 5,Park Road,Chiswick,London,W4 3HH
Change of use from the existing self-contained flat to a holiday let
P/2024/3416
2023 Approved
39 PARK ROAD, CHISWICK, W4 3EY
Erection of one rear and one side roof extension with two front, one side and one rear ro…
P/2023/3965
2023 Approved
GRANDFIELD COURT PARK ROAD, CHISWICK, LONDON
Works to trees within a conservation area G1 - Sycamore x2 Ash x 2 - located next to entr…
P/2023/3660
2022 Approved
35 PARK ROAD, CHISWICK, W4 3EY
Works to Eucalyptus tree T1 in rear garden. Reduction by 1.5-2 metres.
P/2022/3065
2020 Approved
WILL TO WIN CHISWICK HOUSE GROUNDS, CHISWICK, LONDON, W4 2RP
Details of condition 4 (Lighting Report) submitted pursuant of planning permission 00176/…
P/2020/3666
2020 Approved
23A- 23P PARK ROAD, CHISWICK, W4 3HH
Replace existing white single glazed timber windows with white PVCu double glazed windows…
P/2020/1357
2019 Refused
WILL TO WIN CHISWICK HOUSE GROUNDS, CHISWICK, LONDON, W4 2RP
Installation of twelve 5.6 metre high floodlight columns with twelve floodlights to illum…
P/2019/0404
2018 Approved
FLAT GROUND FLOOR 5 PARK ROAD NORTH CHISWICK LONDON W4 4QE
Erection of a single storey rear extension to replace existing
P/2018/2197
2018 Approved
35 PARK ROAD CHISWICK LONDON W4 3EY
Work to tree in a Conservation Area: T1: Eucalyptus spp - Reduce crown to 1m past previou…
P/2018/1492
2017 Approved
O/S 35 ELLESMERE ROAD CHISWICK LONDON W4 3DU
Installation of a Rapid Charging Point, feeder pillar and associated works on the footpat…
P/2017/4012
2017 Refused
WILL TO WIN CHISWICK HOUSE GROUNDS CHISWICK LONDON
Erection of twelve 5.6 metre high flood light columns to illuminate two existing tennis c…
P/2017/3398
2017 Approved
41 PARK ROAD CHISWICK LONDON W4 3EY
Erection of a rear roof extension and the installation of roof windows to the side of the…
P/2017/1256
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

Freehold owner: Information produced by HM Land Registry. © Crown copyright 2026. Source: HM Land Registry, UK and overseas companies that own property in England and Wales, September 2026 release.