House extensions in Merton

Merton received 1,353 householder applications in the last 12 months - about 26 a week. Rear extensions and dormers are the most common. Of the 1,096 decided so far, 991 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 258 applications
Yesterday Pending Consideration 26/PAHE/2365

71 Maycross Avenue, Morden, Surrey, Merton, SM4 4DF

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 3.66m and e...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
22 Oct 2026 Pending Consideration 26/PAHE/2359

64 Chestnut Road, Raynes Park, Merton, SW20 8EB

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 5m, maximum height of 2.95m and e...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
22 Oct 2026 Pending Consideration 26/PAHE/2364

84 Tamworth Lane, Mitcham, Surrey, Merton, CR4 1DA

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 5.04m, maximum height of 3.10m an...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
21 Oct 2026 Pending Consideration 26/PAHE/2358

166 Cannon Hill Lane, Raynes Park, Merton, SW20 9BY

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 2.895m and ...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
20 Oct 2026 Pending Consideration 26/PAHE/2363

135 Kenley Road, Wimbledon, Merton, SW19 3DN

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 5m, maximum height of 4m and eave...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
20 Oct 2026 Pending Consideration 26/FULL/2334

19 Boundary Road, Colliers Wood, Merton, SW19 2AW

Erection of a l-shaped rear dormer roof extension, insertion of X2 rooflights to front roofslope

Full Planning Permission Merton
19 Oct 2026 Pending Consideration 26/FULL/1897

11 Heyford Road, Mitcham, Merton, CR4 3EW

Alterations to the existing front bay window of no. 11 Heyford Road, including removal of the lower/front section of the bay whilst retaining the righ...

Full Planning Permission Merton
16 Oct 2026 Pending Consideration 26/PAHE/2318

1 Allgood Close, Morden, Surrey, Merton, SM4 4PA

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 3m and eave...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
15 Oct 2026 Pending Consideration 26/HOUSE/2191

8, THE HAYLOFT, 17A Seely Road, Tooting, London, Merton, SW17 9QP

Erection of a roof terrace with balustrade, glass screen and skylight

Householder Merton
13 Oct 2026 Pending Consideration 26/PAHE/2279

22 Nursery Road, South Wimbledon, Wimbledon, Merton, SW19 3BT

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 3.5m, maximum height of 4m and ea...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
13 Oct 2026 Pending Consideration 26/FULL/1859

MORDEN COURT PARADE London Road, Morden, Merton

Application for the erection of 9 x self contained flats within proposed enlarged roofspace over existing flats 1-24 Morden Court, with new stairway l...

Full Planning Permission Merton
13 Oct 2026 Pending Consideration 26/PAHE/2280

22 Nursery Road, South Wimbledon, Wimbledon, Merton, SW19 3BT

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 3.5m, maximum height of 4m and ea...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
12 Oct 2026 Pending Consideration 26/LDCP/2296

44 Normanton Avenue, Wimbledon, Merton, SW19 8BB

Installation of two rooflights and replacement of existing rear patio doors to the existing single-storey rear extension.

Lawful Development Certificate - Proposed - Section 192 Merton
12 Oct 2026 Pending Consideration 26/PAHE/2311

182 Abbotsbury Road, Morden, Surrey, Merton, SM4 5JS

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 3.5m and ea...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
12 Oct 2026 Pending Consideration 26/LDCP/2293

58 Stuart Road, Wimbledon, Merton, SW19 8DH

Application for a lawful development certificate in respect of the proposed loft conversion with erection of a rear dormer roof extension and with 3 f...

Lawful Development Certificate - Proposed - Section 192 Merton
12 Oct 2026 Pending Consideration 26/PAHE/2271

119 Elm Walk, Raynes Park, Merton, SW20 9EF

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 4.05m, maximum height of 3.35m an...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
12 Oct 2026 Pending Consideration 26/PAHE/2274

464 Lynmouth Avenue, Morden, Surrey, Merton, SM4 4RU

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 3.5m, maximum height of 3m and ea...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
12 Oct 2026 Pending Consideration 26/PAHE/2276

24 Lyndhurst Avenue, Streatham, London, Merton, SW16 4UF

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 3.8m and ea...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
9 Oct 2026 Pending Consideration 26/HOUSE/2239

151 Melrose Avenue, Wimbledon, Merton, SW19 8AU

Erection of rear mansard roof extension and single storey rear/side extension.

Householder Merton
9 Oct 2026 Pending Consideration 26/NMA/2282

69 Murray Road, Wimbledon, Merton, SW19 4PF

Application for non-material amendments to application 23/P3226, application for variation of condition 2 (approved plans) attached to lbm planning ap...

Non-Material Amendment - Section 96A Merton
9 Oct 2026 Pending Consideration 26/LDCP/2125

326 Lynmouth Avenue, Morden, Surrey, Merton, SM4 4RS

Application for a lawful development certificate in respect of the proposed re-roof of existing outbuilding.

Lawful Development Certificate - Proposed - Section 192 Merton
8 Oct 2026 Pending Consideration 26/LDCP/2255

117 Brangwyn Crescent, Colliers Wood, Merton, SW19 2UA

Lawful development certificate in respect of the proposed erection of a front dormer roof extension and X1 side window at roof level

Lawful Development Certificate - Proposed - Section 192 Merton
8 Oct 2026 Pending Consideration 26/HOUSE/2259

10 Woodland Way, Morden, Surrey, Merton, SM4 4DS

Demolition of the existing detached garage and garden shed and the erection of a single-storey rear extension.

Householder Merton
8 Oct 2026 Pending Consideration 26/HOUSE/2260

113 Church Road, Wimbledon, Merton, SW19 5AL

Erection of a first floor rear extension and alterations to fenestrations.

Householder Merton
8 Oct 2026 Pending Consideration 26/LDCP/2170

342 Hillcross Avenue, Morden, Surrey, Merton, SM4 4EX

Application for a lawful development certificate in respect of the proposed erection of single storey rear extension

Lawful Development Certificate - Proposed - Section 192 Merton
8 Oct 2026 Pending Consideration 26/HOUSE/2257

Flat 3, 98 Vineyard Hill Road, Wimbledon, Merton, SW19 7JJ

Application to change the current window casements to uPVC wood-effect grain uPVC - flat 3 only

Householder Merton
8 Oct 2026 Pending Consideration 26/LDCP/2261

3 Barton Mews, Wimbledon, Merton, SW19 8LQ

Application for a lawful development certificate in respect of the erection of a proposed single storey outbuilding in the rear garden for use inciden...

Lawful Development Certificate - Proposed - Section 192 Merton
7 Oct 2026 Pending Consideration 26/LDCP/2231

71 Vineyard Hill Road, Wimbledon, Merton, SW19 7JL

Application for a lawful development certificate in respect of the erection of a proposed single storey outbuilding in the rear garden for use inciden...

Lawful Development Certificate - Proposed - Section 192 Merton
7 Oct 2026 Pending Consideration 26/HOUSE/2244

19 Chalgrove Avenue, Morden, Surrey, Merton, SM4 5RB

Demolition of existing conservtaory and erection of single storey rear verandah

Householder Merton
7 Oct 2026 Pending Consideration 26/HOUSE/2250

49 Burstow Road, Raynes Park, Merton, SW20 8ST

Application for the proposed loft conversion involving the formation of a rear dormer with sliding glazed doors and juliet balcony, and installation o...

Householder Merton
7 Oct 2026 Pending Consideration 26/HOUSE/2253

118 Lambton Road, Raynes Park, Merton, SW20 0TJ

Application for the proposed removal of existing single storey rear lean-to extension and construction of new 4m deep single storey rear extension wit...

Householder Merton
7 Oct 2026 Approved 16 Oct 26/LDCP/2232

12 Dunmore Road, Raynes Park, Merton, SW20 8TN

Application for a lawful development certificate in respect of the erection of a proposed single storey outbuilding in the rear garden for use inciden...

Lawful Development Certificate - Proposed - Section 192 Merton
6 Oct 2026 Pending Consideration 26/PAHE/2235

63 Ashridge Way, Morden, Surrey, Merton, SM4 4ED

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 4.5m, maximum height of 3.2m and ...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
5 Oct 2026 Pending Consideration 26/LDCP/2216

151 Whatley Avenue, Raynes Park, Merton, SW20 9NT

Application for a lawful development certificate in respect of the proposed erection of a 6m single storey rear extension (with 2no rooflights) and lo...

Lawful Development Certificate - Proposed - Section 192 Merton
5 Oct 2026 Pending Consideration 26/HOUSE/2215

25 Winifred Road, Wimbledon, Merton, SW19 3AS

Rear ground floor extension with a flat roof to create an open plan kitchen/diner and utility.

Householder Merton
2 Oct 2026 Pending Consideration 26/HOUSE/2205

44 Blanchland Road, Morden, Surrey, Merton, SM4 5NE

Erection of a hip to gable and rear dormer roof extension with X3 rooflights to front roofslope, single storey rear extension and front porch

Householder Merton
2 Oct 2026 Approved 21 Oct 26/LDCP/2207

169 Green Lane, Morden, Surrey, Merton, SM4 6SG

Application for a lawful development certificate in respect of the proposed erection of a roof extension comprising a rear dormer and two rooflights t...

Lawful Development Certificate - Proposed - Section 192 Merton
2 Oct 2026 Pending Consideration 26/HOUSE/2208

5 Tynemouth Road, Mitcham, Surrey, Merton, CR4 2BQ

Replacement of existing windows on front, side and rear elevations with white uPVC double glazed sliding-sash windows

Householder Merton
2 Oct 2026 Pending Consideration 26/FULL/1876

30 Robinson Road, Tooting, Merton

Conversion of 2 x flats into a single dwellinghouse, involving the erection of a rear roof extension, a single storey rear extension, insertion of 3 x...

Full Planning Permission Merton
2 Oct 2026 Pending Consideration 26/HOUSE/2206

49 Toynbee Road, Raynes Park, Merton, SW20 8SH

Application for proposed front porch and first floor rear extension, internal alterations and rendering over existing pebble dash.

Householder Merton
2 Oct 2026 Pending Consideration 26/HOUSE/2209

8 Castle Close, Wimbledon, Merton, SW19 5NH

Application for a modest part – two storey ,part – single storey front extension , modest single storey rear extension, provision of PV panels, comfor...

Householder Merton
1 Oct 2026 Pending Consideration 26/HOUSE/2200

188 Lower Morden Lane, Morden, Surrey, Merton, SM4 4SS

Erection of a two storey side extension, single storey rear extension, removal of freestanding garage, loft conversion, and new front porch.

Householder Merton
1 Oct 2026 Pending Consideration 26/HOUSE/2196

1 Lambourne Avenue, Wimbledon, Merton, SW19 7DW

Application for proposed construction of a rear garden outbuilding.

Householder Merton
1 Oct 2026 Pending Consideration 26/LDCP/2199

20 Melrose Avenue, Mitcham, Surrey, Merton, CR4 2EG

Application for a lawful development certificate in respect of the proposed loft conversion with rear dormer and roof lights to the front

Lawful Development Certificate - Proposed - Section 192 Merton
1 Oct 2026 Pending Consideration 26/PAHE/2198

20 Melrose Avenue, Mitcham, Surrey, Merton, CR4 2EG

Application for prior approval in respect of the proposed erection of a single storey rear extension with a depth of 6m, maximum height of 3m and eave...

Prior Approval - Larger Home Extension (6-8m) - Sch 2, Class A, Part 1 Merton
30 Sept 2026 Pending Consideration 26/FULL/2172

55A Aboyne Drive, West Wimbledon, London, Merton, SW20 0AN

Erection of a new outbuilding annexe.

Full Planning Permission Merton
30 Sept 2026 Pending Consideration 26/HOUSE/2187

110 Seymour Avenue, Morden, Surrey, Merton, SM4 4QY

Demolition of existing rear outbuilding and erection of an outbuilding in rear main dwellinghouse

Householder Merton
30 Sept 2026 Pending Consideration 26/HOUSE/2186

62 Effra Road, Wimbledon, Merton, SW19 8PP

single storey rear extension

Householder Merton
30 Sept 2026 Pending Consideration 26/HOUSE/2189

1 Colwood Gardens, Colliers Wood, Merton, SW19 2DS

Single storey rear extension, new porch to the front and replacement windows to the existing building.

Householder Merton
30 Sept 2026 Pending Consideration 26/HOUSE/2192

52 Hartfield Crescent, Wimbledon, Merton, SW19 3SD

Application for the proposed loft conversion with a rear dormer window and two front rooflights in the front roof slope.

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

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