House extensions in Hounslow

Hounslow received 315 householder applications in the last 12 months - about 6 a week. Rear extensions and side extensions are the most common. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

273 last 90 days
|
133 last 30 days
|
65 last 14 days

Filter applications

Date received Last 90 days

Pick a year, or click two to span the range between them. Records before 2026 come from the archive.

Keywords in the address or description
Match

Literal text matches. For application types (extensions, solar, change of use...) use the categories above - no need to recreate them as keywords.

Showing 50 of 273 applications
PA/2026/2042 2 days ago REGISTERED

24 Chestnut Avenue, Brentford TW8 9PY

Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow
PA/2026/2043 2 days ago REGISTERED

108 Syon Lane, Isleworth, TW7 5NJ

Ground floor rear extension 6.00 metres deep, maximum height 3.40 metres, 2.90 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow
P/2026/2039 2 days ago REGISTERED

132 Guildford Avenue,Feltham,TW13 4EL

Erection of a single storey rear extension.

Householder Applications Hounslow
P/2026/2021 2 days ago REGISTERED

37 Flanders Road,Chiswick,W4 1NH

Repositioning of an existing internal timber partition fence, relocation of pedestrian gate, replacement of existing gravel driveway with a permeable ...

Householder Applications Hounslow
P/2026/1987 2 days ago REGISTERED

Red Lion House, Chiswick Mall, Chiswick,London,W4 2PJ

Retention and repairs to the existing doors and sash windows with thermal upgrades to the house.

Householder Applications Hounslow
P/2026/1914 2 days ago REGISTERED

39 Epworth Road, Isleworth, TW7 5BL

Certificate of lawfulness for the proposed use of one room of the house as an office

Lawful Development Certificate (Proposed) Hounslow
P/2026/2024 9 Jul 2026 REGISTERED

20 Hartland Road,Isleworth,TW7 6RH

Erection of a rear roof extension with windows to the front of the house.

Householder Applications Hounslow 9 Jul 2026
P/2026/2025 9 Jul 2026 REGISTERED

1 Kneller Gardens,Isleworth,TW7 7NP

Erection of a single storey rear extension and first floor side extension.

Householder Applications Hounslow 9 Jul 2026
P/2026/2027 9 Jul 2026 REGISTERED

115 Northumberland Crescent,Feltham,TW14 9SP

Certificate of lawfulness for the proposed erection of a rear roof extension and windows to the front of the house.

Lawful Development Certificate (Proposed) Hounslow 9 Jul 2026
P/2026/2033 9 Jul 2026 REGISTERED

3 Benedict Drive, Feltham, TW14 8JH

Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion with windows to the front and side of the ho...

Lawful Development Certificate (Proposed) Hounslow 9 Jul 2026
PA/2026/2028 8 Jul 2026 REGISTERED

115 Northumberland Crescent, Feltham, TW14 9SP

Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 2.70 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 8 Jul 2026
P/2026/2009 8 Jul 2026 REGISTERED

3 Brainton Avenue,Feltham,TW14 0AZ

Certificate of lawfulness for the proposed erection of a rear roof extension and Juliette balcony with front roof windows to the house.

Lawful Development Certificate (Proposed) Hounslow 8 Jul 2026
P/2026/2014 8 Jul 2026 REGISTERED

82 Sussex Avenue,Isleworth,TW7 6LB

Certificate of lawfulness for the proposed erection of a rear roof extension and a porch to the front of the house.

Lawful Development Certificate (Proposed) Hounslow 8 Jul 2026
P/2026/2017 8 Jul 2026 REGISTERED

15 Sutton Hall Road,Hounslow,TW5 0PX

Erection of a part first floor rear extension and front porch.

Householder Applications Hounslow 8 Jul 2026
P/2026/1997 8 Jul 2026 REGISTERED

375 Flat Basement,Chiswick High Road,Chiswick,London,W4 4AG

Demolition of existing single-storey rear infill extension and erection of replacement single-storey rear infill extension to the existing basement fl...

PF-Full Applications Hounslow 8 Jul 2026
P/2026/1975 8 Jul 2026 REGISTERED

6 Stamford Brook Avenue,Chiswick,London,W6 0YD

Enlargement of the existing basement including the formation of a rear lightwell. Erection of a single-storey rear infill extension with a part-glazed...

Householder Applications Hounslow 8 Jul 2026
P/2026/1983 8 Jul 2026 REGISTERED

43 Dawes Avenue, Isleworth, TW7 7JS

GS853573342 - Erection of a hip to gable and rear roof extension with minor ridge increase to the house

Householder Applications Hounslow 8 Jul 2026
PA/2026/1967 8 Jul 2026 REGISTERED

96 New Road, Bedfont, TW14 8HT

Ground floor rear extension 6.00 metres deep, maximum height 3.10 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 8 Jul 2026
P/2026/1951 8 Jul 2026 REGISTERED

66 Whitestile Road, Brentford, TW8 9NL

Erection of a single storey rear extension to the house. Following the demolition of the rear extension.

Householder Applications Hounslow 8 Jul 2026
P/2026/2006 7 Jul 2026 REGISTERED

98 Devonshire Road,Chiswick,W4 2HS

Certificate of lawfulness for the proposed erection of a rear roof extension with windows to the front of the house.

Lawful Development Certificate (Proposed) Hounslow 7 Jul 2026
PA/2026/2011 7 Jul 2026 REGISTERED

15 Sutton Hall Road,Hounslow,TW5 0PX

Ground floor rear extension 6.00 metres deep, maximum height 3.50 metres, 2.91 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 7 Jul 2026
P/2026/1986 7 Jul 2026 REGISTERED

7 Eyot Green,Chiswick,W4 2PT

Erection of a single storey detached outbuilding with window alterations & roof light.

Householder Applications Hounslow 7 Jul 2026
P/2026/1988 7 Jul 2026 REGISTERED

9 Wareham Close,Hounslow,TW3 3PX

Certificate of lawfulness the proposed erection of a rear roof extension with hip to gable conversion.

Lawful Development Certificate (Proposed) Hounslow 7 Jul 2026
P/2026/1991 7 Jul 2026 REGISTERED

8 Saxon Avenue,Feltham,TW13 5JN

Certificate of the proposed erection of a rear roof extension with hip to gable conversion with front windows to the front of the house.

Lawful Development Certificate (Proposed) Hounslow 7 Jul 2026
P/2026/1992 7 Jul 2026 REGISTERED

8 Saxon Avenue,Feltham,TW13 5JN

Erection of a single storey rear extension.

Householder Applications Hounslow 7 Jul 2026
P/2026/1994 7 Jul 2026 REGISTERED

34 Craigwell Avenue,Feltham,TW13 7JP

Certificate of lawfulness for the proposed erection of a single storey detached outbuilding.

Lawful Development Certificate (Proposed) Hounslow 7 Jul 2026
P/2026/2003 7 Jul 2026 REGISTERED

51 Jersey Road, Hounslow, TW5 0TR

GS854202838 Erection of a rear roof extension to the house

Householder Applications Hounslow 7 Jul 2026
P/2026/1981 7 Jul 2026 REGISTERED

29 Ranelagh Gardens,Stamford Brook Avenue,Chiswick,London,W6 0YE

Replacement of all existing single-glazed timber sash window sashes and two existing single-glazed timber external doors to the third-floor apartment ...

PF-Full Applications Hounslow 7 Jul 2026
P/2026/1966 7 Jul 2026 REGISTERED

22 Arnold Crescent,Isleworth,TW7 7NT

Erection of a part single part two storey side extension and single storey rear extension.

Householder Applications Hounslow 7 Jul 2026
P/2026/1936 7 Jul 2026 REGISTERED

Flat First Floor, 102 New Heston Road, Hounslow, TW5 0LF

Erection of a rear roof and outrigger extension with two front roof windows to the flat

PF-Full Applications Hounslow 7 Jul 2026
P/2026/1937 7 Jul 2026 REGISTERED

Flat Ground Floor, 102 New Heston Road, Hounslow, TW5 0LF

Erection of a single storey detached outbuilding for use as a home office in the rear garden of the flat

PF-Full Applications Hounslow 7 Jul 2026
P/2026/1922 7 Jul 2026 REGISTERED

18 Newlands Close, Southall, UB2 5TN

Creation of vehicular access to the house

Householder Applications Hounslow 7 Jul 2026
P/2026/1925 7 Jul 2026 REGISTERED

19 Cranbrook Road,Chiswick,London,W4 2LH

Certificate of lawfulness for the proposed erection of a rear roof extension with outrigger and front roof windows to the house.

Lawful Development Certificate (Proposed) Hounslow 7 Jul 2026
P/2026/1961 7 Jul 2026 REGISTERED

9 Rupert Road, Chiswick, London, W4 1LU

Installation of matching designed replacement timber framed windows with slimline double glazing.

PF-Full Applications Hounslow 7 Jul 2026
PA/2026/1985 6 Jul 2026 REGISTERED

14 Wilton Road,Hounslow,TW4 7LP

Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 6 Jul 2026
PA/2026/1993 6 Jul 2026 REGISTERED

125 Cromwell Road,Hounslow,TW3 3QL

Ground floor rear extension 6.00 metres deep, maximum height 4.00 metres, 2.48 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 6 Jul 2026
PA/2026/1998 6 Jul 2026 REGISTERED

149 Wentworth Road, Southall, UB2 5TX

Ground floor rear extension 6.00 metres deep, maximum height 3.00 metres, 2.85 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 6 Jul 2026
P/2026/1974 6 Jul 2026 REGISTERED

40 Durham Road,Feltham,TW14 0AD

Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and front roof windows to the house.

Lawful Development Certificate (Proposed) Hounslow 6 Jul 2026
P/2026/1969 6 Jul 2026 REGISTERED

Grandfield Court,Park Road,Chiswick,London,W4 3EP

Erection of an additional storey at roof level to the existing building to provide five self-contained residential flats with associated private ameni...

PF-Full Applications Hounslow 6 Jul 2026
P/2026/1947 6 Jul 2026 REGISTERED

104 Rosemary Avenue,Hounslow,TW4 7JG

Certificate of lawfulness for the proposed erection of a rear roof extension with windows to the front of the house.

Lawful Development Certificate (Proposed) Hounslow 6 Jul 2026
P/2026/1795 6 Jul 2026 REGISTERED

13 A St Johns Road,Isleworth,TW7 6NB

Retrospective application for the erection of a rear roof extension and rear outrigger extension, and the installation of three front roof windows at ...

PF-Full Applications Hounslow 6 Jul 2026
P/2026/1771 6 Jul 2026 REGISTERED

19 Prebend Gardens,Chiswick,W4 1TN

Erection of a single storey side extension.

Householder Applications Hounslow 6 Jul 2026
P/2026/1498 6 Jul 2026 REGISTERED

215 High Street, Hounslow, TW3 1DH

Erection of a third floor, first floor rear extension and second floor rear extension comprising of six self contained flats and commercial unit on th...

PF-Full Applications Hounslow 6 Jul 2026
P/2026/1952 3 Jul 2026 REGISTERED

196 Wellington Road South,Hounslow,TW4 5JL

Certificate of lawfulness for the proposed replacement of like for like windows and external doors, external wall insulation with a rendered finish to...

Lawful Development Certificate (Proposed) Hounslow 3 Jul 2026
P/2026/1924 3 Jul 2026 REGISTERED

4 Flanders Road, Chiswick, London, W4 1NG

Erection of a side and rear dormer with a front and rear solar tube to the house, and increase in height of the existing outbuilding and installation ...

Householder Applications Hounslow 3 Jul 2026
P/2026/1929 3 Jul 2026 REGISTERED

17 Norfolk Road, Feltham, TW13 5BX

Erection of a part first floor rear extension to the house

Householder Applications Hounslow 3 Jul 2026
P/2026/1965 2 Jul 2026 REGISTERED

10 Burlington Road, Isleworth, TW7 4LY

GS852178549 - Erection of a single storey rear extension and a side roof extension to the house

Householder Applications Hounslow 2 Jul 2026
P/2026/1941 2 Jul 2026 REGISTERED

110 Bassett Gardens, Isleworth, TW7 4QY

Erection of a rear wraparound extension and part first floor rear extension. Conversion of existing garage to a habitable space.

Householder Applications Hounslow 2 Jul 2026
PA/2026/1949 2 Jul 2026 REGISTERED

8 Wright Road,Hounslow,TW5 9LR

Ground floor rear extension 6.00 metres, maximum height 3.150 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow 2 Jul 2026
P/2026/1916 2 Jul 2026 REGISTERED

Police Station, 34 Hanworth Road, Feltham, TW13 5BD

Replacement of existing vehicular and pedestrian gate with associated new control pedestals, new fencing and posts.

PF-Full Applications Hounslow 2 Jul 2026
Recency
Last 2 weeks
2-4 weeks
1-2 months
Older

Get free email alerts for new extensions applications in Hounslow

Set up alerts

Frequently asked questions

When do you need planning permission for a house extension?
Single-storey rear extensions up to 4m (detached) or 3m (semi-detached / terraced) are usually permitted development. Two-storey extensions, anything in a conservation area, or larger projects almost always need a planning application.
What's the difference between planning permission and permitted development?
Permitted development rights let you build certain things without applying for planning permission, subject to specified limits. Anything outside those limits — taller, larger, in a protected area — needs full planning permission.
How long does a householder application take?
The statutory target is 8 weeks from validation. Most simple householder extensions are decided within that window; complex or contested cases (especially with objections) can take longer.
Can I get email alerts for new extensions applications in Hounslow?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Hounslow. You can also narrow the alert to a postcode, street, or drawn area.

We check Hounslow's planning portal daily. New extensions applications appear here within a day of being published.