House extensions in Brighton and Hove

Brighton and Hove received 594 householder applications in the last 12 months - about 11 a week. Rear extensions and dormers are the most common. Of the 390 decided so far, 376 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 178 applications
Yesterday Registered BH2026/01988

12 Cobden Road Brighton BN2 9TL

Proposed ground floor rear infill extension.

Brighton And Hove
Yesterday Registered BH2026/02033

Flat 3 48 Montpelier Road Brighton BN1 3BA

Erection of a single-storey outbuilding in the rear garden.

Brighton And Hove
4 Sept 2026 Registered BH2026/02029

15 Millcroft Brighton BN1 5HA

Prior approval for the erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00m, for which t...

Brighton And Hove
2 Sept 2026 Registered BH2026/02022

13 Coleridge Street Hove BN3 5AB

Prior approval for the erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.24m, for which t...

Brighton And Hove
2 Sept 2026 Registered BH2026/01904

23 Eskbank Avenue Brighton BN1 8SL

Erection of single storey outbuilding to north of dwelling for use as home gym.

Brighton And Hove
1 Sept 2026 Registered BH2026/02010

11 Thornhill Avenue Brighton BN1 8RG

Prior approval for the erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.0m, for which th...

Brighton And Hove
1 Sept 2026 Registered BH2026/02004

31 Hogarth Road Hove BN3 5RH

Prior approval for the erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.0m, for which th...

Brighton And Hove
1 Sept 2026 Registered BH2026/01923

3 Franklin Road Brighton BN2 3AD

Roof conversion including rear dormer and front rooflights and creation of a first floor rear balcony.

Brighton And Hove
28 Aug 2026 Registered BH2026/01994

43 Holmes Avenue Hove BN3 7LB

Conversion and extension of existing garage outbuilding into additional sleeping accommodation with and ensuite shower room and realignment of drivewa...

Brighton And Hove
28 Aug 2026 Registered BH2026/01995

26 Overhill Drive Brighton BN1 8WH

Erection of a single-storey rear extension, construction of a new front entrance porch, partial conversion of the existing garage, and a loft conversi...

Brighton And Hove
28 Aug 2026 Registered BH2026/01898

32 Osborne Villas Hove BN3 2RE

Removal of side windows to kitchen and replacement with single window to South elevation. Installation of replacement rear door and wooden staircase a...

Brighton And Hove
28 Aug 2026 Registered BH2026/01897

Flat A 83 Preston Drove Brighton BN1 6LD

Erection of single storey rear extension.

Brighton And Hove
28 Aug 2026 Registered BH2026/01895

25 And 26 Stonehurst Court Down Terrace Brighton BN2 9ZQ

Conversion of 2no former bedsits into 1no two storey, two bedroom dwelling (C3), with erection of single storey rear extension, removal of outbuilding...

Brighton And Hove
27 Aug 2026 Registered BH2026/01987

12 Cobden Road Brighton BN2 9TL

Proposed addition of a rear dormer and 3no rooflights.

Brighton And Hove
25 Aug 2026 Registered BH2026/01975

105B Beaconsfield Villas Brighton BN1 6HF

Certificate of lawfulness for proposed siting of single storey mobile home in rear garden, ancillary to the main dwelling.

Brighton And Hove
24 Aug 2026 Registered BH2026/01970

112 Stapley Road Hove BN3 7FG

Erection of a detached single storey, 4.5m wide x 4.9m deep x 2.5m high annexe in the rear garden.

Brighton And Hove
24 Aug 2026 Registered BH2026/01877

Ground Floor Flat 28 Chester Terrace Brighton BN1 6GB

Erection of a single storey detached outbuilding to rear.

Brighton And Hove
21 Aug 2026 Registered BH2026/01963

35 Old Steine Brighton BN1 1NT

Construction of freestanding shoring scaffold to support Clive House (part retrospective).

Brighton And Hove
20 Aug 2026 Registered BH2026/01949

15 Shenfield Way Brighton BN1 7EX

Erection of single storey side extension

Brighton And Hove
20 Aug 2026 Registered BH2026/01954

78 Peacock Lane Brighton BN1 6WA

New first floor bedroom with new side facing means of escape window.

Brighton And Hove
20 Aug 2026 Registered BH2026/01893

58 Tumulus Road Saltdean Brighton BN2 8FS

Creation of new parking area to western side of property (part retrospective).

Brighton And Hove
19 Aug 2026 Registered BH2026/01940

107 Denton Drive Brighton BN1 8DL

Single storey rear extension and raised decking to replace existing conservatory.

Brighton And Hove
19 Aug 2026 Registered BH2026/01874

14 Ashford Road Brighton BN1 6LJ

Application to vary condition 1 of planning permission BH2026/00840 to amend approved drawings to increase the depth and height of the ground floor ex...

Brighton And Hove
18 Aug 2026 Registered BH2026/01926

4 Upper Hamilton Road Brighton BN1 5DF

Certificate of lawfulness for the proposed L-shaped dormer at the rear.

Brighton And Hove
18 Aug 2026 Registered BH2026/01924

Flat 2 24 Third Avenue Hove BN3 2PD

Revised fenestration and internal works at lower ground floor level.

Brighton And Hove
18 Aug 2026 Registered BH2026/01939

5 Connaught Terrace Hove BN3 3YW

Certificate of lawfulness for proposed loft conversion with rear dormer and front rooflights.

Brighton And Hove
18 Aug 2026 Registered BH2026/01931

2 Wilmington Close Brighton BN1 8JE

Proposed rear extension

Brighton And Hove
18 Aug 2026 Registered BH2026/01903

11 Auckland Drive Brighton BN2 4JD

Prior approval for the erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.95m, for which t...

Brighton And Hove
14 Aug 2026 Registered BH2026/01911

74 Grange Road Hove BN3 5HW

Certificate of Lawfulness for the proposed erection of a rear dormer, and the installation of 2no. front rooflights.

Brighton And Hove
14 Aug 2026 Registered BH2026/01917

25 Grove Street Brighton BN2 9NY

Certificate of Lawfulness for the proposed loft conversion, comprising a rear dormer and three front rooflights.

Brighton And Hove
14 Aug 2026 Registered BH2026/01920

77 Coombe Vale Saltdean Brighton BN2 8HN

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

Brighton And Hove
14 Aug 2026 Registered BH2026/01915

234 Mackie Avenue Brighton BN1 8SD

Erection of single storey rear extension, alterations to fenestration and roof alterations including hip to gable roof extension, front rooflights and...

Brighton And Hove
13 Aug 2026 Registered BH2026/01902

3 Kestrel Close Hove BN3 6NS

Erection of single storey flat roof rear extension.

Brighton And Hove
13 Aug 2026 Registered BH2026/01901

11 Stanmer Avenue Saltdean Brighton BN2 8QL

Erection of single storey front extension and hip to gable roof extension with front rooflights and rear dormer.

Brighton And Hove
13 Aug 2026 Registered BH2026/01818

20 De Montfort Road Brighton BN2 3AU

Erection of single storey rear extension to replace existing conservatory.

Brighton And Hove
12 Aug 2026 Registered BH2026/01889

14 Harrington Road Brighton BN1 6RE

Demolition of existing lean-to extension at rear and part of front boundary wall, rebuilding of front boundary with wider vehicular access and wider r...

Brighton And Hove
12 Aug 2026 Registered BH2026/01888

113 Crescent Drive South Brighton BN2 6SB

Certificate of lawfulness for proposed loft conversion incorporating rear dormer and front and rear rooflights. Erection of single storey rear extensi...

Lawful Development Certificate Proposed Brighton And Hove
11 Aug 2026 Registered BH2026/01880

Flat 7 4 Powis Square Brighton BN1 3HH

Removal of two existing modern casement storm windows and replacement with traditional flush painted timber windows.

Brighton And Hove
11 Aug 2026 Registered BH2026/01881

Flat 7 4 Powis Square Brighton BN1 3HH

Removal of two existing modern casement storm windows and replacement with traditional flush painted timber windows.

Brighton And Hove
11 Aug 2026 Registered BH2026/01873

17 Withdean Crescent Brighton BN1 6WG

Erection of single storey rear extension with sloping roof and increase to level of rear decking.

Brighton And Hove
11 Aug 2026 Registered BH2026/01876

60 Edburton Avenue Brighton BN1 6EL

Replacement of existing windows with timber framed double glazed sliding sash windows to the ground floor front and side elevations.

Brighton And Hove
11 Aug 2026 Registered BH2026/01885

32 Medmerry Hill Brighton BN2 4TQ

Certificate of lawfulness for proposed loft conversion incorporating hip to gable extension, rear dormer and 2no. front rooflights.

Lawful Development Certificate Proposed Brighton And Hove
10 Aug 2026 Registered BH2026/01855

5 - 6 Richmond Gardens Brighton BN2 9PF

Removal of existing single storey side extension. Construction of two storey side extension and external staircase.

Brighton And Hove
10 Aug 2026 Registered BH2026/01851

34 Hampden Road Brighton BN2 9TN

Single storey rear extension with lower patio and loft conversion with front and rear dormers

Brighton And Hove
10 Aug 2026 Registered BH2026/01868

101 Hangleton Road Hove BN3 7SF

Certificate of lawfulness for roof alterations/extensions including removal of chimney, hip to gable extension, rear dormer and front rooflight.

Brighton And Hove
10 Aug 2026 Registered BH2026/01858

49 Greenfield Crescent Brighton BN1 8HL

Erection of a rear dormer extension and two-storey rear extension, together with internal and external alterations including the removal of existing c...

Brighton And Hove
10 Aug 2026 Registered BH2026/01799

Flat 5 10 Lansdowne Place Hove BN3 1HG

Internal alterations to layout of flat.

Brighton And Hove
7 Aug 2026 Registered BH2026/01842

58 Eldred Avenue Brighton BN1 5EG

Prior approval for the erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.00m, for which t...

Brighton And Hove
5 Aug 2026 Registered BH2026/01835

54 Station Road Portslade BN41 1DF

Erection of single storey rear extension (retrospective).

Brighton And Hove
5 Aug 2026 Registered BH2026/01833

64 Carlisle Road Hove BN3 4FS

Removal of existing orangery and rear extension and replacement with new rear extension with rooflights, extension of first floor outrigger gable end ...

Brighton And Hove
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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 Brighton and Hove?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Brighton and Hove. You can also narrow the alert to a postcode, street, or drawn area.

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