House extensions in Slough

Slough received 701 householder applications in the last 12 months - about 13 a week. Rear extensions and dormers are the most common. Of the 490 decided so far, 397 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 231 applications
Yesterday Registered application P/02115/003

171, High Street, Langley, Slough, SL3 8LP

Construction of a single storey front extension to include a front porch and part single storey, part two storey side extension.

Full Planning Slough
Yesterday Registered application P/20559/004

9, Ives Road, Slough, Slough, SL3 8PB

Retrospective application for the retention of a single storey rear extension built to an increased height to previous approved plans

Full Planning Slough
Yesterday Registered P/21199/000

24, Paxton Avenue, Slough, SL1 2SY

Construction of a single storey side extension, front porch, garage conversion and a single storey detached outbuilding to be used as a gym.

Certificate Proposed (Use/Development) Slough
Yesterday Registered application P/02784/018

Islamic Centre, 83, Stoke Poges Lane, Slough, SL1 3NY

Retrospective application for detached outbuilding used for strorage

Full Planning Slough
Yesterday Registered application P/11135/002

62, Castleview Road, Slough, SL3 7NQ

Construction of a single storey front, side and rear wrap around extension and a part first floor rear extension

Full Planning Slough
23 Oct 2026 Registered application P/02604/005

22, Hillrise, Slough, SL3 8RB

Construction of a single storey rear extension, garage conversion and front port

Full Planning Slough
22 Oct 2026 Registered application P/08219/002

12, Morley Close, Slough, SL3 8DN

Construction of single storey front, side to rear extension following demolition of existing garage and increase of height to existing rear extension ...

Full Planning Slough
22 Oct 2026 Registered application P/09998/003

192, Rochfords Gardens, Slough, SL2 5XL

Construction of a single storey side infill extension

Full Planning Slough
22 Oct 2026 Registered application Y/09252/002

175, Farnham Lane, Slough, SL2 2EW

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.00m, with a maximum height of 3.55m...

Permitted Development with Consultation Slough
22 Oct 2026 Registered application Y/21178/000

159, Trelawney Avenue, Slough, SL3 8RQ

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 5.0m, with a maximum height of 3.2m, ...

Permitted Development with Consultation Slough
21 Oct 2026 Registered application P/03387/005

20, Alderbury Road, Slough, SL3 8DQ

Construction of single storey rear extension.

Full Planning Slough
21 Oct 2026 Registered application P/21194/000

555, Bath Road, Slough, SL1 6AB

Conversion of existing detached garage and store to incidental domestic accomoda

Full Planning Slough
21 Oct 2026 Registered application Y/17707/002

133, Waterbeach Road, Slough, SL1 3JX

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4.00m, with a maximum height of 3.65m...

Permitted Development with Consultation Slough
20 Oct 2026 Registered application P/02512/004

2A, Mallard Drive, Slough, SL1 5BP

Construction of a single storey part rear extension

Full Planning Slough
20 Oct 2026 Registered application P/21182/000

98, Seacourt Road, Slough, SL3 8EW

Lawful development certificate for proposed single storey side extension following demolition of existing garage.

Certificate Proposed (Use/Development) Slough
20 Oct 2026 Registered application P/20517/003

85, Paxton Avenue, Slough, SL1 2SX

Construction of a single storey rear extension

Full Planning Slough
20 Oct 2026 Registered application Y/21154/000

86, Faraday Road, Slough, SL2 1RW

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 4m, with a maximum height of 3.10m, a...

Permitted Development with Consultation Slough
19 Oct 2026 Registered application P/21196/000

25, Uxbridge Road, Slough, SL1 1SN

Construction of a detached ancillary rear outbuilding for use of gym & shower room

Full Planning Slough
19 Oct 2026 Registered application P/20362/003

7, Hampden Road, Slough, SL3 8SF

Lawful development certificate for a proposed rear outbuilding for use of gym &

Certificate Proposed (Use/Development) Slough
19 Oct 2026 Registered application P/07103/001

31, Broadmark Road, Slough, SL2 5QD

Construction of a first floor side and rear extension and garage conversion

Full Planning Slough
16 Oct 2026 Registered application Y/21192/000

10, Aldborough Spur, Slough, SL1 3EN

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.0m, with a maximum height of 3m, an...

Permitted Development with Consultation Slough
16 Oct 2026 Registered application P/21189/001

23, Stoke Poges Lane, Slough, SL1 3NX

Lawful development certificate for a proposed hip to gable loft conversion with rear dormer, 2no front roof lights & a proposed first floor dormer win...

Certificate Proposed (Use/Development) Slough
15 Oct 2026 Registered application P/00393/013

388-390, Farnham Road, Slough, Berkshire, SL2 1JD

Fixed front canopy structure with glazed sides, providing a covered dining area and ancillary external customer facilities associated with the existin...

Full Planning Slough
15 Oct 2026 Registered application P/02523/014

Langley Village Club, 27, Cheviot Road, Slough, SL3 8LA

Construction of new second floor, part two storey front infill extension and changes to fenestrations due to Internal Re-modelling works at ground and...

Full Planning Slough
15 Oct 2026 Registered application P/16271/002

Wellingtons Daycare, 4 Waterside Court, Langley, SL3 6EZ

Retrospective permission for a timber outbuilding to be used as additional nursery space

Full Planning Slough
14 Oct 2026 Registered application P/21191/001

100, Moreton Way, Slough, SL1 5LU

Lawful development certificate for proposed loft conversion with rear dormer, single storey side extension and front porch.

Certificate Proposed (Use/Development) Slough
14 Oct 2026 Registered application Y/21191/000

100, Moreton Way, Slough, SL1 5LU

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.0m, with a maximum height of 3m, an...

Permitted Development with Consultation Slough
14 Oct 2026 Registered application Y/20889/002

321 Uxbridge Road, Slough, SL2 5RG

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 5.00m, with a maximum height of 3.12m...

Permitted Development with Consultation Slough
14 Oct 2026 Registered application Y/12435/003

234, Langley Road, Slough, SL3 7EF

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.0m, with a maximum height of 3m, an...

Permitted Development with Consultation Slough
14 Oct 2026 Registered application P/21189/000

23, Stoke Poges Lane, Slough, SL1 3NX

Retrospective single storey rear extension

Full Planning Slough
14 Oct 2026 Registered application P/00559/005

9, Burroway Road, Slough, SL3 8EH

Construction of a single storey rear outbuilding for use of gym, games & store room

Full Planning Slough
14 Oct 2026 Registered application P/21184/000

25, Raymond Road, Slough, SL3 8LN

Construction of a single storey rear extension

Full Planning Slough
14 Oct 2026 Registered application Y/21057/001

30, Laburnum Grove, Slough, SL3 8QU

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 5.60m, with a maximum height of 3.00 ...

Permitted Development with Consultation Slough
14 Oct 2026 Registered application P/07131/004

408-410, Bath Road, Slough, SL1 6JA

Construction of a part single and part two storey side/rear extension, to extend the existing ground floor and provide a new studio flat with changes ...

Full Planning Slough
13 Oct 2026 Registered application Y/21187/000

33, Belmont, Slough, SL2 1SU

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.00m, with a maximum height of 3.00m...

Permitted Development with Consultation Slough
13 Oct 2026 Registered application P/06358/013

Offices to the rear of 21 Stoke Road, Slough, SL2 5AH

Construction of a first floor extension to create 2no 1no bedroom flats and the change of use of the commerical offices.

Full Planning Slough
12 Oct 2026 Registered application Y/21186/000

1, Moat Drive, Slough, SL2 5TG

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.00m, with a maximum height of 3.30m...

Permitted Development with Consultation Slough
12 Oct 2026 Registered application Y/14264/001

18, Alpha Street North, Slough, SL1 1RB

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6.00m, with a maximum height of 3.00m...

Permitted Development with Consultation Slough
12 Oct 2026 Registered application P/06726/005

9, Kendrick Road, Slough, SL3 7PQ

Retrospective application for a single storey side infill extension, changes to fenestration on ground floor, first floor & roof level, relocation of ...

Full Planning Slough
9 Oct 2026 Registered application P/21185/000

4, Hunstanton Close, Colnbrook, Slough, SL3 0RL

Conversion of garage into habitable room

Full Planning Slough
9 Oct 2026 Registered application P/21134/001

7, Trumper Way, Slough, SL1 5EY

Lawful development certificate for a proposed loft conversion with rear dormer, 3no front roof lights and insertion of window to loft side elevation

Certificate Proposed (Use/Development) Slough
9 Oct 2026 Registered application P/16962/002

1, Odencroft Road, Slough, SL2 2BS

Construction of a part single storey, part two storey side and rear extension to existing dwelling.

Full Planning Slough
9 Oct 2026 Registered application Y/21169/000

215, Stoke Road, Slough, SL2 5AX

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 8m, with a maximum height of 3m, and ...

Permitted Development with Consultation Slough
8 Oct 2026 Registered application Y/21063/001

13, Huntercombe Lane South, Taplow, Maidenhead, Berkshire, SL6 0PQ

The erection of two single storey rear extension, which would extend beyond the rear wall of the original house by 8m, with a maximum height of 4m, an...

Permitted Development with Consultation Slough
8 Oct 2026 Registered application P/21124/002

35, Westgate Crescent, Slough, SL1 5BY

Lawful development certificate for a proposed front porch

Certificate Proposed (Use/Development) Slough
8 Oct 2026 Registered application P/21181/000

96, Grasmere Avenue, Slough, SL2 5JF

Construction of a single storey front & rear and two storey side extension

Full Planning Slough
8 Oct 2026 Registered application P/14023/004

38, Palmerston Avenue, Slough, SL3 7PU

Construction of a loft conversion with a rear & front dormer and 3no rooflights on the front roof slope.

Full Planning Slough
8 Oct 2026 Registered application Y/21180/000

144, Knolton Way, Slough, SL2 5RY

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 6m, with a maximum height of 3.1m, an...

Permitted Development with Consultation Slough
7 Oct 2026 Registered application P/08479/003

11, Ives Road, Slough, Slough, SL3 8PB

Retrospective application for the retention of a single storey rear extension built to an increase height.

Full Planning Slough
7 Oct 2026 Registered application Y/04903/002

25, Newton Close, Slough, SL3 8DD

The erection of a single storey rear extension, which would extend beyond the rear wall of the original house by 5.5m, with a maximum height of 3.15m,...

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

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