House extensions in Sutton

Sutton received 901 householder applications in the last 12 months - about 17 a week. Rear extensions and dormers are the most common. Of the 733 decided so far, 641 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 247 applications
23 Oct 2026 Pending Consideration DM2026/01112

17 The Spinney North Cheam SM3 8JG

Formation of a new vehicle crossover and provision of hardstanding.

Householder Application Sutton
22 Oct 2026 Pending Consideration DM2026/01221

18 Warren Park Road Sutton SM1 4PA

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to second floor flank elevation and roofligh...

Certificate of Proposed Use Sutton
22 Oct 2026 Pending Consideration DM2026/01220

7 Sandringham Road Worcester Park KT4 8XW

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to second floor flank elevation, rooflights ...

Certificate of Proposed Use Sutton
21 Oct 2026 Pending Consideration DM2026/01217

7 Windsor Avenue North Cheam SM3 9RR

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflights to front roofslope.

Certificate of Proposed Use Sutton
21 Oct 2026 Pending Consideration DM2026/01116

85 Camborne Road Sutton SM2 6RF

Erection of a two storey side extension, provision of new boundary treatment and formation of a new vehicle crossover for access to and from Camborne ...

Householder Application Sutton
20 Oct 2026 Pending Consideration DM2026/01212

4 Byron Gardens Sutton SM1 3QG

Erection of a single storey rear extension, partial conversion of the garage to a habitable room with associated external works.

Householder Application Sutton
20 Oct 2026 Pending Consideration DM2026/01170

39 Wordsworth Drive North Cheam SM3 8HD

Erection of a single storey front/side extension including the conversion of garage into habitable rooms, alterations to fenestrations and internal al...

Householder Application Sutton
20 Oct 2026 Pending Consideration DM2026/01210

15 The Green Hackbridge SM6 7AU

Erection of a single storey rear extension, formation of a front entrance porch and alterations to the fenestrations.

Full Application Sutton
20 Oct 2026 Pending Consideration DM2026/01213

15 Kingsdown Road Cheam SM3 8NZ

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflight to front roofslope and alterations to fe...

Certificate of Proposed Use Sutton
19 Oct 2026 Pending Consideration DM2026/00653

10 - 11 The Market Wrythe Lane Carshalton SM5 1AG

Erection of a second floor rear extension to provide two new self contained residential units, alterations to fenestrations including the removal of f...

Full Application Sutton
19 Oct 2026 Pending Consideration DM2026/01207

50 St Clair Drive Worcester Park KT4 8UQ

Conversion of loft space involving alterations to existing roofline, dormer extensions each side and and a rooflight to front roofslope. Alterations t...

Certificate of Proposed Use Sutton
19 Oct 2026 Pending Consideration DM2026/01205

20 Downside Road Sutton SM2 5HP

Provision of a raised rear deck with raised planters and steps leading down to garden land.

Householder Application Sutton
19 Oct 2026 Pending Consideration DM2026/01203

20 Peony Drive Mitcham Junction CR4 4FT

Erection of a single storey rear extension and installation of a pergola to the garden.

Householder Application Sutton
19 Oct 2026 Pending Consideration DM2026/01201

64 Lymescote Gardens Sutton SM1 2PG

Erection of a single storey rear extension and a front entrance porch.

Householder Application Sutton
16 Oct 2026 Pending Consideration DM2026/01198

54 Egham Crescent North Cheam SM3 9AW

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflights to front roofslope.

Householder Application Sutton
16 Oct 2026 Pending Consideration DM2026/01178

94 Grosvenor Avenue Carshalton SM5 3EP

Retention and completion of the conversion of loft space involving alterations to existing roofline and a dormer extension at rear.

Householder Application Sutton
16 Oct 2026 Pending Consideration DM2026/00391

69 Cornwall Road Cheam SM2 6DU

Change of use from Class C3 (residential) to Class C4 (small house of multiple occupation) to provide 4 HMO rooms, involving the erection of a single ...

Full Application Sutton
16 Oct 2026 Pending Consideration DM2026/01007

11 Brinkley Road Worcester Park KT4 8JE

Erection of a single storey rear extension including alteration to fenestrations and provision of steps down to the existing raised rear deck/patio ar...

Householder Application Sutton
16 Oct 2026 Pending Consideration DM2026/01189

31 Albion Road Sutton SM2 5TA

Demolition of the existing conservatory, erection of a single storey side extension and alterations to the fenestrations.

Full Application Sutton
15 Oct 2026 Pending Consideration DM2026/01166

Elvet House 18 Holmwood Gardens Wallington SM6 0HN

Erection of a single storey front, side and rear extension, a single storey side extension, alterations to fenestrations including the removal of exte...

Householder Application Sutton
15 Oct 2026 Pending Consideration DM2026/01192

6 The Gallop Sutton SM2 5RU

Erection of a single storey side and rear extension.

Householder Application Sutton
15 Oct 2026 Pending Consideration DM2026/01134

40 - 42 Stafford Road Wallington SM6 9AA

Erection of a part one, part two storey rear/flank extension, a first floor rear/flank extension, conversion of loft space involving alterations to ex...

Full Application Sutton
14 Oct 2026 Pending Consideration DM2026/01167

4 Oakwood Wallington SM6 0RD

Erection of a single storey detached outbuilding to rear garden land.

Certificate of Proposed Use Sutton
14 Oct 2026 Pending Consideration DM2026/01150

4 Highfield Road Sutton SM1 4JX

Demolition of the single storey front/flank garage and shed and single storey rear/flank extension, erection of a detached two storey dwelling with ac...

Full Application Sutton
14 Oct 2026 Pending Consideration DM2026/01187

14 Lower Road Sutton SM1 4QW

Prior Approval for a single storey rear extension projecting from the rear of the original house by 5m.

PA Householder Rear Extension Sutton
13 Oct 2026 Pending Consideration DM2026/00939

Banstead Road Hall Banstead Road Carshalton SM5 3NS

Erection of a first floor to the existing building to create a two storey building involving alterations to the front entrance and fenestration's. Pro...

Full Application Sutton
13 Oct 2026 Pending Consideration DM2026/01185

Flat 1 14C York Road Cheam SM2 6HG

Provision of replacement front and rear window and doors to rear.

Full Application Sutton
13 Oct 2026 Pending Consideration DM2026/01181

41 Welbeck Road Sutton SM1 3NN

Formation of a front entrance porch.

Certificate of Proposed Use Sutton
12 Oct 2026 Pending Consideration DM2026/01164

7 Oaks Avenue Worcester Park KT4 8XE

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to flank roofslope and rooflights to front r...

Certificate of Proposed Use Sutton
12 Oct 2026 Pending Consideration DM2026/01174

13 Oaklands Way Wallington SM6 9RR

Prior Approval for a single storey rear extension projecting from the rear of the original house by 3.5m.

PA Householder Rear Extension Sutton
12 Oct 2026 Pending Consideration DM2026/01175

14 West Avenue Wallington SM6 8PH

Erection of a single storey rear extension, conversion of loft space involving a dormer extension at rear, rooflights to front roofslope, removal of a...

Certificate of Proposed Use Sutton
9 Oct 2026 Pending Consideration DM2026/01142

19 Browning Avenue Worcester Park KT4 8AZ

Erection of a single storey rear extension.

Householder Application Sutton
9 Oct 2026 Pending Consideration DM2026/01145

126 The Chase Wallington SM6 8JS

Erection of outbuilding.

Certificate of Proposed Use Sutton
9 Oct 2026 Pending Consideration DM2026/01015

Collingwood School 3 Springfield Road Wallington SM6 0BD

Erection of a single storey side extension to existing detached building.

Full Application Sutton
9 Oct 2026 Pending Consideration DM2026/01171

18 Lavington Road Beddington CR0 4PP

Erection of an outbuilding.

Certificate of Proposed Use Sutton
9 Oct 2026 Pending Consideration DM2026/01002

60 Halesowen Road Morden SM4 6NG

Erection of an attached two storey dwelling involving alteration of existing roofline to original dwelling, with cycle and refuse storage to rear and ...

Full Application Sutton
7 Oct 2026 Pending Consideration DM2026/01124

152 Croydon Road Beddington CR0 4PG

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear and rooflights to front roofslope.

Certificate of Proposed Use Sutton
7 Oct 2026 Pending Consideration DM2026/00993

10 Bute Gardens Wallington SM6 8SS

Erection of a single storey rear extension.

Householder Application Sutton
7 Oct 2026 Pending Consideration DM2026/01158

5 Leslie Gardens Sutton SM2 6QU

Erection of a single storey rear extension and conversion of garage into habitable room involving increased roof height.

Householder Application Sutton
7 Oct 2026 Pending Consideration DM2026/01151

3 Farrier Place Sutton SM1 3HU

Conversion of loft space involving alterations to existing roofline, a dormer extension at rear, a window to flank roofslope and a rooflight to front ...

Householder Application Sutton
6 Oct 2026 Pending Consideration DM2026/01140

50A The Ridgway Sutton SM2 5JU

Conversion of the garage into a habitable room and alteration to fenestrations.

Householder Application Sutton
6 Oct 2026 Pending Consideration DM2026/00972

25 Carshalton Road Sutton SM1 4LF

Retention of a single storey front extension, outbuilding to side, alterations to fenestrations and associated landscaping.

Full Application Sutton
6 Oct 2026 Pending Consideration DM2026/01161

63 Hamilton Avenue North Cheam SM3 9EA

Prior Approval for a single storey rear extension projecting from the rear of the original house by 6m.

PA Householder Rear Extension Sutton
5 Oct 2026 Pending Consideration DM2026/01135

66 Avenue Road Belmont SM2 6JB

Erection of a single storey side and rear extensions.

Householder Application Sutton
5 Oct 2026 Pending Consideration DM2026/01131

71 Longfellow Road Worcester Park KT4 8BE

Erection of a single storey rear extension and erection of an outbuilding.

Householder Application Sutton
5 Oct 2026 Pending Consideration DM2026/01038

51 Anne Boleyn's Walk Cheam SM3 8DE

Erection of a part one part two storey front, side and rear extension and rooflight to front roofslope.

Householder Application Sutton
5 Oct 2026 Pending Consideration DM2026/01155

18 The Avenue Cheam SM2 7QB

Erection of a single storey rear extension.

Householder Application Sutton
5 Oct 2026 Pending Consideration DM2026/01154

47 Acre Lane Carshalton SM5 3AA

Prior Approval for a single storey rear extension projecting from the rear of the original house by 4.5m.

PA Householder Rear Extension Sutton
5 Oct 2026 Pending Consideration DM2026/01153

65 Chiltern Road Sutton SM2 5QU

Conversion of the garage into a habitable room and associated external work including the replacement of the garage door with a window.

Certificate of Proposed Use Sutton
5 Oct 2026 Pending Consideration DM2026/01079

9 Bridgefield Road Sutton SM1 2DG

Demolition of a single storey rear extension and conservatory and erection of a single storey rear extension.

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

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