House extensions in Hounslow

Hounslow received 1,031 householder applications in the last 12 months - about 20 a week. Rear extensions and side extensions are the most common. Of the 701 decided so far, 588 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

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Showing 50 of 335 applications
Yesterday REGISTERED: Under Consultation P/2026/2556

91 Park Road,Chiswick,W4 3ER

Erection of a two storey side and rear extension and rear roof extension.

Householder Applications Hounslow
2 days ago REGISTERED: Under Consultation P/2026/2502

11 West Way,Hounslow,TW5 0JD

Erection of a first floor rear extension.

Householder Applications Hounslow
2 days ago REGISTERED: Under Consultation P/2026/2561

13 Heather Close, Isleworth, TW7 7PR

Erection of a rear roof extension.

Householder Applications Hounslow
2 days ago REGISTERED: Under Consultation P/2026/2538

51A Imperial Road, Feltham, TW14 8AE

Erection of a part first floor rear extension to the house.

PF-Full Applications Hounslow
2 days ago REGISTERED: Under Consultation PA/2026/2565

31 Spencer Road, Isleworth, TW7 4BN

Ground floor rear extension 4.00 metres deep, maximum height 3.60 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow
2 days ago REGISTERED: Under Assessment P/2026/2564

2 Church Walk,Brentford,TW8 8DB

Certificate of lawfulness for the proposed erection of a single storey rear extension and rear roof extension with three roof windows to the front.

Lawful Development Certificate (Proposed) Hounslow
2 days ago REGISTERED: Under Consultation P/2026/2062

11 Cross Road,Feltham,TW13 6QP

Erection of a single storey side and extension.

Householder Applications Hounslow
8 Sept 2026 REGISTERED: Under Consultation P/2026/2523

Great West House,993 Great West Road,Brentford,TW8 9DF

Alteration to the central staircore external elevation, replacing the existing full height glazing with a solid insulated wall and a narrower band of ...

PF-Full Applications Hounslow
8 Sept 2026 REGISTERED: Under Consultation P/2026/2541

62 Thornbury Road,Isleworth,TW7 4LN

Erection of a single storey detached outbuilding.

Householder Applications Hounslow
8 Sept 2026 REGISTERED: Under Consultation PA/2026/2551

98 Bulstrode Avenue,Hounslow,TW3 3AG

Ground floor rear extension 5.00 metres deep, maximum height 2.95 metres, 2.95 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow
8 Sept 2026 REGISTERED: Under Consultation PA/2026/2550

63 Beavers Crescent,Hounslow,TW4 6EU

Ground floor rear extension 5.00 metres deep, maximum height 3.51 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow
8 Sept 2026 REGISTERED: Under Assessment P/2026/2549

63 Beavers Crescent,Hounslow,TW4 6EU

Certificate of lawfulness for the proposed erection of a single storey side extension.

Lawful Development Certificate (Proposed) Hounslow
7 Sept 2026 REGISTERED: Under Assessment P/2026/2526

20 Bleriot Road,Hounslow,TW5 9LG

Certificate of Lawfulness for the proposed erection of a single storey rear extension and a part first floor rear extension.

Lawful Development Certificate (Proposed) Hounslow
7 Sept 2026 REGISTERED: Under Consultation P/2026/2535

13 Orchard Avenue,Hounslow,TW5 0DU

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

Householder Applications Hounslow
7 Sept 2026 REGISTERED: Under Consultation P/2026/2414

105 Barrowgate Road,Chiswick,W4 4QS

Erection of a single storey rear extension with rooflights.

Householder Applications Hounslow
4 Sept 2026 REGISTERED: Under Consultation P/2026/2474

115 Roxborough Avenue, Isleworth, TW7 5HH

Erection of a single storey rear extension, front porch extension, part side extension and first floor side extension to the house.

Hounslow
4 Sept 2026 REGISTERED: Under Consultation P/2026/2517

27 Geraldine Road,Chiswick,W4 3PA

Erection of a rear roof extension with two roof windows to front and a single storey ground floor rear infill extension.

Hounslow
4 Sept 2026 REGISTERED: Under Consultation PA/2026/2518

21 Berkeley Waye,Hounslow,TW5 9HJ

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

Hounslow
3 Sept 2026 REGISTERED: Under Assessment P/2026/2485

57 Armytage Road,Hounslow,TW5 9JL

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

Hounslow
3 Sept 2026 REGISTERED: Under Consultation P/2026/2497

170 Gunnersbury Avenue (north Circular Road),Hounslow,W3 8LB

Erection of a single storey detached outbuilding.

Hounslow
3 Sept 2026 REGISTERED: Under Consultation P/2026/2503

25 Arnold Crescent,Isleworth,TW7 7NS

Erection of a single storey rear, two storey side extension, and rear roof extension with two front roof windows to the house.

Hounslow
2 Sept 2026 REGISTERED: Under Consultation P/2026/2470

12 Legrace Avenue,Hounslow,TW4 7RS

Erection of a two storey side extension, single storey rear extension and part first floor rear extension, together with a hip to gable roof extension...

Hounslow
2 Sept 2026 REGISTERED: Under Assessment P/2026/2459

2 Letchworth Avenue,Feltham,TW14 9RY

Certificate of Lawfulness for the proposed hip to gable roof conversion, installation of two front roof windows, and erection of a rear roof extension...

Hounslow
2 Sept 2026 REGISTERED: Under Assessment P/2026/2488

69 Cromwell Road,Hounslow,TW3 3QG

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

Hounslow
2 Sept 2026 REGISTERED: Under Consultation P/2026/2486

6 Speart Lane,Hounslow,TW5 9EF

Enlargement of the front porch.

Hounslow
2 Sept 2026 REGISTERED: Under Consultation PA/2026/2481

6 Speart Lane,Hounslow,TW5 9EF

Ground floor rear extension 8.00 metres deep, maximum height of 3.00 metres, 2.80 metres high to the eaves

Hounslow
2 Sept 2026 REGISTERED: Under Consultation P/2026/2489

57 Armytage Road,Hounslow,TW5 9JL

Erection of a first floor rear extension.

Householder Applications Hounslow
1 Sept 2026 REGISTERED: Under Consultation P/2026/2423

42 Hamilton Road,Brentford,TW8 0QF

Erection of a single storey rear extension.

Householder Applications Hounslow
1 Sept 2026 REGISTERED: Under Consultation P/2026/2418

36 Napier Road,Isleworth,TW7 7HP

Erection of a rear roof extension.

Householder Applications Hounslow
1 Sept 2026 REGISTERED: Under Consultation P/2026/2454

53 Prebend Gardens, Chiswick, London, W6 0XT

GS867437957 - Erection of a single storey rear extension and a rear roof extension with an additional front roof window to the house

Householder Applications Hounslow
1 Sept 2026 REGISTERED: Under Assessment P/2026/2476

4 Upton Road, Hounslow, TW3 3HP

(GS868132614) Certificate of lawfulness proposed for a single storey rear infill extension and a rear roof and outrigger extension with one front roof...

Lawful Development Certificate (Proposed) Hounslow
1 Sept 2026 REGISTERED: Under Consultation PA/2026/2475

4 Upton Road,Hounslow,TW3 3HP

GS868133219 - Ground floor rear extension 6.00 metres deep, maximum height of 3.00 metres, 3.00 metres high to the eaves

Prior Approval Larger Home Extension Hounslow
1 Sept 2026 REGISTERED: Under Assessment P/2026/2473

16 Somerset Waye,Hounslow,TW5 9HG

Certificate of lawfulness for the proposed erection of a rear roof extension with two roof windows to the front and alterations to the existing side r...

Lawful Development Certificate (Proposed) Hounslow
1 Sept 2026 REGISTERED: Under Consultation P/2026/2472

53 Wilmington Avenue,Chiswick,W4 3HA

Erection of a single storey rear extension.

Householder Applications Hounslow
28 Aug 2026 REGISTERED: Under Consultation P/2026/2401

12 Consort Mews,Isleworth,TW7 7NA

Erection of a two storey side extension, part single storey part two storey rear extension, porch extension to the front, alterations to fenestrations...

Householder Applications Hounslow
28 Aug 2026 REGISTERED: Under Consultation P/2026/2416

90 Bassett Gardens,Isleworth,TW7 4QY

Erection of a single storey rear and side infill extension with two roof windows to the rear and a replacement window to the side.

Householder Applications Hounslow
28 Aug 2026 REGISTERED: Under Consultation P/2026/2450

22 Waldeck Road, Chiswick, London, W4 3NP

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

Householder Applications Hounslow
28 Aug 2026 REGISTERED: Under Consultation P/2026/2445

20 Parkwood Road,Isleworth,TW7 5HA

Revised single storey rear infill extension, installation of drainage channel adjacent to the front boundary, and reduction in height of front gate an...

Householder Applications Hounslow
28 Aug 2026 REGISTERED: Under Consultation P/2026/2457

44 Percival Road,Feltham,TW13 4LQ

Erection of a two storey side extension and enlargement of the front porch.

Householder Applications Hounslow
28 Aug 2026 REGISTERED: Under Assessment P/2026/2456

42 College Road,Isleworth,TW7 5DW

Certificate of lawfulness for the proposed erection of a single storey rear extension.

Lawful Development Certificate (Proposed) Hounslow
28 Aug 2026 REGISTERED: Under Consultation PA/2026/2461

24 Kingston Avenue, Feltham, TW14 9SL

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
28 Aug 2026 REGISTERED: Under Consultation PA/2026/2458

82 Ringway, Southall UB2 5SU

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
27 Aug 2026 REGISTERED: Under Consultation P/2026/2413

328 Bedfont Lane,Feltham,TW14 9NU

Erection of a rear roof extension with hip to gable conversion and front rooflight.

Householder Applications Hounslow
27 Aug 2026 REGISTERED: Under Assessment P/2026/2441

10 Haslemere Avenue,Hounslow,TW5 9UT

Certificate of lawfulness for the proposed erection of a rear roof extension with hip to gable conversion and the erection of a detached outbuilding i...

Lawful Development Certificate (Proposed) Hounslow
27 Aug 2026 REGISTERED: Under Consultation P/2026/2439

15 Shakespeare Way,Feltham,TW13 7PE

Replacement of roof on side extension from a flat roof to a ridged roof.

Householder Applications Hounslow
27 Aug 2026 REGISTERED: Under Consultation P/2026/2452

7 Towfield Road,Feltham,TW13 5LR

Erection of a single storey rear extension.

Householder Applications Hounslow
27 Aug 2026 REGISTERED: Under Consultation P/2026/2354

73 Riverview Grove,Chiswick,W4 3QP

Erection of a single storey rear extension following demolition of existing rear conservatory

Householder Applications Hounslow
26 Aug 2026 REGISTERED: Under Consultation P/2026/2433

374 Jersey Road,Isleworth,TW7 5PL

Erection of a front porch extension following the blocking of the side entrance along with replacement windows and doors to the side and rear.

Householder Applications Hounslow
26 Aug 2026 REGISTERED: Under Consultation P/2026/2432

6 Oxford Road North,Chiswick,W4 4DN

Erection of a rear and side infill extension with roof windows and the erection of a rear and side roof extension.

Householder Applications Hounslow
26 Aug 2026 REGISTERED: Under Assessment P/2026/2429

43 Blossom Waye,Hounslow,TW5 9HB

Certificate of lawfulness for the proposed hip to gable conversion of the roof.

Lawful Development Certificate (Proposed) Hounslow
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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, whether taller, larger or 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 those drawing a lot of comments, 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.