House extensions in Croydon

Croydon received 401 householder applications in the last 12 months - about 8 a week. Rear extensions and dormers are the most common. Of the 323 decided so far, 254 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

121 last 90 days
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40 last 30 days
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Showing 50 of 121 applications
26/01929/FUL 6 Jul 2026 Pending

10C South Vale Upper Norwood London SE19 3BA

Erection of garden room.

Croydon 6 Jul 2026
26/01927/GPDO 6 Jul 2026 Pending

81 Grange Road South Croydon CR2 0NF

Erection of a single storey rear extension which projects out from the original rear wall of the property by 4 metres with an eaves height of 3 metres...

Croydon 6 Jul 2026
26/01932/GPDO 6 Jul 2026 Pending

25 Norhyrst Avenue South Norwood London SE25 4BY

Demolition of existing conservatory and erection of a single storey rear extension which projects out from the rear wall of the original house by 4 me...

Croydon 6 Jul 2026
26/01917/LP 3 Jul 2026 Awaiting decision

44 Wakefield Gardens Upper Norwood London SE19 2NR

Erection of a rear dormer with installation of two rooflights on front roof slope

Croydon 3 Jul 2026
26/01914/GPDO 2 Jul 2026 Awaiting decision

72 Kynaston Road Thornton Heath CR7 7AY

Erection of a single storey rear extension which projects out from the rear wall of the original house by 4 metres, with an eaves height of 2.68 metre...

Prior Appvl - Class A Larger House Extns Croydon 2 Jul 2026
26/01900/HSE 1 Jul 2026 Awaiting decision

15 Shaw Crescent South Croydon CR2 9JB

Erection of two-storey rear/side infill extension. Erection of single-storey side/rear extension. Alterations to exisitng fenestration.

Householder Application Croydon 1 Jul 2026
26/01883/LP 30 Jun 2026 Decided

149 Valley Road Kenley CR8 5BZ

Erection of hip-to-gable extension and rear dormer includes installation of two rooflights to front roofslope and two Juillet balconies. Erection of s...

LDC (Proposed) Operations edged Croydon 30 Jun 2026
26/01886/GPDO 30 Jun 2026 Awaiting decision

38 Bishops Park Road Norbury London SW16 5TS

Erection of a single storey rear extension which projects out from the rear wall of the original house by 4.1 metres, with an eaves height of 2.5 metr...

Prior Appvl - Class A Larger House Extns Croydon 30 Jun 2026
26/01863/GPDO 26 Jun 2026 Awaiting decision

27 Overbury Crescent Croydon CR0 0LR

Erection of a single storey rear extension projecting out 5 meters from the original rear wall with an overall maximum height of 3 meters

Prior Appvl - Class A Larger House Extns Croydon 26 Jun 2026
26/01860/GPDO 26 Jun 2026 Awaiting decision

125 Downs Road Coulsdon CR5 1AD

Erection of a single storey rear extension which projects out from the rear wall of the original house by 4.5 metres with an eaves height of 2.97 metr...

Prior Appvl - Class A Larger House Extns Croydon 26 Jun 2026
26/01858/GPDO 26 Jun 2026 Awaiting decision

88 Kilmartin Avenue Norbury London SW16 4QZ

Erection of a single-storey rear extension which projects out from the original rear wall of the property by 4.915 metres with an eaves height of 3.47...

Prior Appvl - Class A Larger House Extns Croydon 26 Jun 2026
26/01854/GPDO 25 Jun 2026 Awaiting decision

108 Norbury Avenue Thornton Heath CR7 8AF

Demolition of the existing conservatory and erection of a single storey rear extension which projects out from the rear wall of the original property ...

Prior Appvl - Class A Larger House Extns Croydon 25 Jun 2026
26/01862/GPDO 25 Jun 2026 Awaiting decision

236 Brighton Road South Croydon CR2 6AH

Erection of a single storey rear extension which projects out by 3.8 metres from the rear wall of the original property, with an eaves height of 2.54 ...

Prior Appvl - Class A Larger House Extns Croydon 25 Jun 2026
26/01824/GPDO 24 Jun 2026 Awaiting decision

60 Elmwood Road Croydon CR0 2SJ

Erection of a single storey rear extension which projects out from the rear wall of the original house by 6 metres with an eaves height of 2.9 metres ...

Prior Appvl - Class A Larger House Extns Croydon 24 Jun 2026
26/01838/GPDO 24 Jun 2026 Awaiting decision

20 Springfield Road Thornton Heath CR7 8DY

Erection of a single storey rear extension which projects out from the rear wall of the original property by 6 metres with an eaves height of 3 metres...

Prior Appvl - Class A Larger House Extns Croydon 24 Jun 2026
26/01829/HSE 24 Jun 2026 Awaiting decision

9 Coombe Wood Hill Purley CR8 1JP

Erection of single-storey side extensions to both sides of dwelling.

Householder Application Croydon 24 Jun 2026
26/01815/GPDO 23 Jun 2026 Awaiting decision

17 Zermatt Road Thornton Heath CR7 7BL

Erection of a single storey rear extension which projects out from the original rear wall of the property by 4.5 metres with an eaves height of 2.8 me...

Prior Appvl - Class A Larger House Extns Croydon 23 Jun 2026
26/01820/HSE 23 Jun 2026 Awaiting decision

136 Clifton Road South Norwood London SE25 6QA

Erection of single storey rear extension, new canopy over existing front door and rooflight to rear roof slope

Householder Application Croydon 23 Jun 2026
26/01793/GPDO 22 Jun 2026 Awaiting decision

99 Mayfield Road Thornton Heath CR7 6DP

Erection of a single storey rear extension which projects out from the rear wall of the original house by 4 metres with an eaves height of 3 metres an...

Prior Appvl - Class A Larger House Extns Croydon 22 Jun 2026
26/01803/HSE 22 Jun 2026 Awaiting decision

18 Steyning Close Kenley CR8 5LP

New single storey side and rear extension following demolition of existing garage and car port.

Householder Application Croydon 22 Jun 2026
26/01802/LP 22 Jun 2026 Decided

18 Steyning Close Kenley CR8 5LP

Side and rear dormer roof extension

LDC (Proposed) Operations edged Croydon 22 Jun 2026
26/01792/CONR 22 Jun 2026 Awaiting decision

110 Devonshire Way Croydon CR0 8BS

Application Reference Number: 26/00830/HSE Date of Decision: 12/05/2026 Condition Number(s): 2 Conditions(s) Removal: The applicants would like to rai...

Removal of Condition Croydon 22 Jun 2026
26/01780/LP 19 Jun 2026 Decided

40 Brooklyn Avenue South Norwood London SE25 4NL

Erection of a hip to gable end roof extension and dormer window within the rear roof slope. Installation of three roof lights within the front roof sl...

LDC (Proposed) Operations edged Croydon 19 Jun 2026
26/01785/HSE 19 Jun 2026 Awaiting decision

27 Whitefield Avenue Purley CR8 4BP

Alterations, erection of first floor rear extension and provision of first floor window in side elevation

Householder Application Croydon 19 Jun 2026
26/01762/GPDO 18 Jun 2026 Awaiting decision

3 Woodcrest Road Purley CR8 4JD

Erection of a single storey rear extension which projects out from the rear wall of the original house by 6 metres, with an eaves height of 2.9 metres...

Prior Appvl - Class A Larger House Extns Croydon 18 Jun 2026
26/01750/GPDO 17 Jun 2026 Awaiting decision

75 Lancing Road Croydon CR0 3EN

Erection of a single storey rear extension which projects out from the rear wall of the original house by 5 metres, with an eaves height of 2.8 metres...

Prior Appvl - Class A Larger House Extns Croydon 17 Jun 2026
26/01730/GPDO 15 Jun 2026 Awaiting decision

121 Kynaston Avenue Thornton Heath CR7 7BZ

Demolish existing extension and out-building. Erection of a single storey rear extension which projects out from the rear wall of the original house b...

Prior Appvl - Class A Larger House Extns Croydon 15 Jun 2026
26/01727/LP 15 Jun 2026 Decided

24 Round Grove Croydon CR0 7PP

Demolition of existing rear extension, erection of a 4m single-storey rear extension, conversion of existing garage and construction of a detached out...

LDC (Proposed) Operations edged Croydon 15 Jun 2026
26/01713/LP 12 Jun 2026 Awaiting decision

32 Downsview Road Upper Norwood London SE19 3XB

Erection of roof extension

LDC (Proposed) Operations edged Croydon 12 Jun 2026
26/01701/GPDO 11 Jun 2026 Awaiting decision

61 Cedar Road Croydon CR0 6UJ

Erection of a single storey rear extension which projects out from the rear wall of the original house by 6 metres, with an eaves height of 3 metres a...

Prior Appvl - Class A Larger House Extns Croydon 11 Jun 2026
26/01708/FUL 11 Jun 2026 Awaiting decision

2 - 8 Altyre Road Croydon CR9 2LG

Alterations to the existing building (including replacement door, insertion of rooflights and terrace spaces at roof level,removal of metal cladding) ...

Full planning permission Croydon 11 Jun 2026
26/01702/LP 11 Jun 2026 Awaiting decision

61 Cedar Road Croydon CR0 6UJ

Erection of rear dormer extension and installation of roof windows to front elevation

LDC (Proposed) Operations edged Croydon 11 Jun 2026
26/01692/HSE 10 Jun 2026 Awaiting decision

78 Woodmere Avenue Croydon CR0 7PE

Demolition of Existing Garage and Erection of a Single Storey Side Extension

Householder Application Croydon 10 Jun 2026
26/01677/FUL 9 Jun 2026 Awaiting decision

Warehouse 516 London Road Thornton Heath CR7 7HQ

Erection of a rear dormer window within the rear roof slope to facilitate a loft conversion, together with the installation of French doors with Julie...

Full planning permission Croydon 9 Jun 2026
26/01673/HSE 9 Jun 2026 Awaiting decision

23 Orchard Rise Croydon CR0 7QZ

single storey ground floor rear extension

Householder Application Croydon 9 Jun 2026
26/01626/FUL 4 Jun 2026 Awaiting decision

2 - 8 Altyre Road Croydon CR9 2LG

Alterations to the existing building (including replacement door, openings at roof level, lift overrun at roof level and opaque window panels) and alt...

Full planning permission Croydon 4 Jun 2026
26/01615/HSE 3 Jun 2026 Awaiting decision

109 Foxley Lane Purley CR8 3HQ

Erection of single storey rear extension. Erection of single storey side extension. Alterations.

Householder Application Croydon 3 Jun 2026
26/01620/HSE 3 Jun 2026 Awaiting decision

25 Beechwood Road South Croydon CR2 0AE

Remove existing rear terrace and replace with new terrace/decking and new access to rear garden.

Householder Application Croydon 3 Jun 2026
26/01597/LP 2 Jun 2026 Decided

25 Old Fox Close Coulsdon CR3 5QU

Erection of single-storey rear extension. Erection of single-storey detached outbuilding to be used as an office.

LDC (Proposed) Operations edged Croydon 2 Jun 2026
26/01609/HSE 2 Jun 2026 Awaiting decision

82 Church Way South Croydon CR2 0JR

Erection of single storey rear extension, single storey front extension and upward extension to create habitable space. Alterations include changes to...

Householder Application Croydon 2 Jun 2026
26/01591/LP 1 Jun 2026 Decided

17 Zermatt Road Thornton Heath CR7 7BL

Construction of a dormer extension within the rear roof slope and installation of 3x roof lights within the front roof slope.

LDC (Proposed) Operations edged Croydon 1 Jun 2026
26/01590/LP 1 Jun 2026 Decided

17 Zermatt Road Thornton Heath CR7 7BL

Erection of a single storey rear extension.

LDC (Proposed) Operations edged Croydon 1 Jun 2026
26/01583/FUL 1 Jun 2026 Awaiting decision

12 - 16 Addiscombe Road Croydon CR0 0XT

External alterations to No. 1 Croydon, including the replacement of existing windows and installation of ventilation grills

Full planning permission Croydon 1 Jun 2026
26/01580/HSE 1 Jun 2026 Awaiting decision

115 Upper Selsdon Road South Croydon CR2 0DU

Erection of single storey front/side extension. Alterations include changes to fenestration arrangement.

Householder Application Croydon 1 Jun 2026
26/01585/FUL 1 Jun 2026 Awaiting decision

94 Mayfield Road South Croydon CR2 0BF

Alterations include provision of recessed balcony to side elevation, changes to façade and fenestration arrangement. Conversion of existing dwelling (...

Full planning permission Croydon 1 Jun 2026
26/01581/HSE 1 Jun 2026 Awaiting decision

26 Pytchley Crescent Upper Norwood London SE19 3QT

Demolition of existing single storey annexe building. Erection of part single/part double storey side/rear extension. Loft conversion includes erectio...

Householder Application Croydon 1 Jun 2026
26/01561/HSE 29 May 2026 Awaiting decision

79 Tennison Road South Norwood London SE25 5RY

Alterations, demolition of existing garage and erection of single-storey side and front extension

Householder Application Croydon 29 May 2026
26/01539/HSE 27 May 2026 Awaiting decision

258 Whitehorse Lane South Norwood London SE25 6UR

Erection of a single storey side/rear extension

Householder Application Croydon 27 May 2026
26/01545/HSE 27 May 2026 Awaiting decision

66 Kennelwood Crescent Croydon CR0 0DQ

Demolition of existing garage/storage to build a single storey front, side and rear extension

Householder Application Croydon 27 May 2026
26/01532/LP 26 May 2026 Decided

59 Semley Road Norbury London SW16 4PL

Construction of a dormer extension within the rear roof slope and installation of two rooflights within the front roof slope. Demolition of the existi...

LDC (Proposed) Operations edged Croydon 26 May 2026
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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 — taller, larger, 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 with objections) can take longer.
Can I get email alerts for new extensions applications in Croydon?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Croydon. You can also narrow the alert to a postcode, street, or drawn area.

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