House Extension planning applications in the UK

Search house extension, loft conversion, and dormer applications by postcode, town, street, address, council, or planning reference.

Covers householder extension applications: single-storey rear and two-storey side extensions, loft conversions and dormers, wraparound extensions, porches, garage conversions, outbuildings and garden rooms, orangeries and conservatories.

58,273
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17,160
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Showing 50 of 58,273 applications
Yesterday Pending 26/3621/PNH

57 Woodville Road London NW11 9TS

2no. Single storey rear extensions with a proposed depth of 6.00 metres, maximum height of 3.00 metres and eaves height of 3.00 metres and depth of 3....

Barnet
Yesterday Pending 26/3628/192

53 Tudor Road Barnet EN5 5NW

Roof extension involving rear dormer window and 1no. front facing rooflights

Barnet
Yesterday Pending 26/3629/PNH

13 West Walk Barnet EN4 8NT

Single storey rear extension with a depth of 4.00 metres, a maximum height of 3.78 metres and an eaves height of 2.88 metres, following the demolition...

Barnet
Yesterday Pending 26/3630/FUL

6 Accommodation Road London NW11 8ED

Mansard roof extension with front dormer windows and 3no. rear facing rooflights

Barnet
Yesterday With Case Officer 26/01862/FUL

19 The Grove Bexleyheath Kent DA6 8HD

Erection of a single storey rear extension and front porch extension including alterations to front fenestration and installation of steps to rear gar...

Detailed Planning Application Bexley
Yesterday Valid 26/03908/LDC

35 Cumberland Road, Shortlands, Bromley, BR2 0PL

Demolition of existing conservatory. Construction of a single storey rear extension and side elevational alterations. LAWFUL DEVELOPMENT CERTIFICATE ...

Lawful development Bromley
Yesterday Withdrawn 0790/26

43 Blindmans Lane Cheshunt Hertfordshire EN8 9DW

Prior approval for 5m single storey rear extension

Prior Approval 42 Days Broxbourne
Yesterday REGISTERED 07/26/0769/LDP

1 Stafford Drive Broxbourne Hertfordshire EN10 7JT

Certificate of lawfulness for proposed hip to gable loft conversion with rear dormer

Lawful Dev. Cert. (Proposed) Broxbourne
Yesterday REGISTERED 07/26/0771/LDP

141 Ranworth Avenue Hoddesdon Hertfordshire EN11 9NU

Certificate of lawfulness for proposed single storey rear extension, conversion of garage to habitable room, loft conversion with rear dormer and erec...

Lawful Dev. Cert. (Proposed) Broxbourne
Yesterday Registered PL/26/07641/FA

Tygwyn 34 Howard Crescent Seer Green Buckinghamshire HP9 2XP

Householder application for the construction of a first-floor rear extension with pitched roof.

Full Application Buckinghamshire
Yesterday Registered PL/26/07726/FA

70 and 72 Oakridge Road High Wycombe Buckinghamshire HP11 2PL

Joint works comprising of part-single/part-first floor/part-two storey side and rear extensions together with fenestration alterations and the inserti...

Full Application Buckinghamshire
Yesterday Awaiting decision PL/26/07767/SA

29 Cam Mead Aylesbury Buckinghamshire HP21 7DZ

Certificate of lawfulness for proposed single storey extension to the rear with pitched roof and velux windows.

Certificate of Lawful Use - Proposed Buckinghamshire
Yesterday Registered PL/26/08108/PNE

Nabowla Nicol Road Chalfont St Peter Buckinghamshire SL9 9LX

Notification under The Town and Country Planning (General Permitted Development) Order 2015, Part 1 of Schedule 2 Class A for: single storey rear exte...

Prior Appr Buckinghamshire
Yesterday New application 2026/4340/P

59 Ornan Road London NW3 4QD

Erection of an additional storey on the existing dwellinghouse.

Historic application Camden
Yesterday Under Consultation 26/02632/LB

Gage Farm Sibford Road Epwell Oxfordshire OX15 6LH

Replacement boot room windows and formation of a first floor en-suite and cupboard, with associated drainage and roof vents

Listed Building Cherwell
Yesterday Pending 4/26/2314/0F1

55 High Road, Whitehaven

Rear single storey extension, new side window, solar panels and new detached garage to rear garden

Copeland
Yesterday Pending 4/26/2311/0F1

12 Santon Way, Seascale

Proposed garage for storage

Copeland
Yesterday Awaiting decision PA26/06564

2 Halsetown St Ives TR26 3NA

Erection of a single-storey rear extension and associated works

Cornwall
Yesterday Awaiting decision PA26/06732

3 Lewman Road Probus Truro Cornwall TR2 4LL

Rear/side extension to ground floor.

Cornwall
Yesterday Awaiting decision PA26/06868

1 Godolphin Avenue Marazion Cornwall TR17 0ES

Internal Refurbishment & Loft Conversion of Single Story Dwelling & Associated Works with variation of Condition 2 of decision notice PA25/09356 dated...

Cornwall
Yesterday Pending Consideration 26/01270/FUL

5 Pastures Avenue Derby DE23 4BE

Two storey and first floor extensions to dwelling house (glazed entrance, bedrooms, bathroom and en-suites)

Derby
Yesterday Out To Consultation P/HOU/2026/04822

12 Shepherds Way West Lulworth BH20 5SL

Replace existing balcony

Householder Planning Permission Dorset
Yesterday Out To Consultation P/HOU/2026/05316

16 Fortuneswell Portland DT5 1LP

Removal of existing flat roof dormer windows to front and rear elevations and replace with enlarged flat roof dormer windows. Remove existing asbestos...

Householder Planning Permission Dorset
Yesterday Out To Consultation P/HOU/2026/05578

59 Coombe Valley Road Weymouth DT3 6NL

Conversion of loft space; installation of solar panels and skylight to roof; replacement of windows and doors; replacement of existing weatherboarding...

Householder Planning Permission Dorset
Yesterday Awaiting decision 26/1981/FUL

Woodbury House Greenway Woodbury Devon EX5 1LS

Proposed demolition of existing single storey side extension and construction of new single storey side extension, reroof (with solar PV slates on S.E...

Full Application East Devon
Yesterday Awaiting decision 26/1982/LBC

Woodbury House Greenway Woodbury Devon EX5 1LS

Proposed demolition of existing single storey side extension and construction of new single storey side extension, reroof (with solar PV slates on S.E...

Listed Building Consent East Devon
Yesterday Awaiting decision 26/2002/FUL

Martins Stockland Honiton EX14 9EF

Proposed single storey rear extension and first floor extension over existing garage; enlargement of front porch and addition of cladding

Full Application East Devon
Yesterday Awaiting decision 26/2033/FUL

The Bothy Hill Barn Gore Lane Uplyme Lyme Regis DT7 3RJ

Proposed first floor rear extension with creation of an elevated rear entrance to include access stairs

Full Application East Devon
Yesterday Pending 260511

32 Harding Avenue Eastbourne East Sussex BN22 8PJ

Erection of single storey rear extension

Eastbourne
Yesterday Approved 2020/1850

1 - 3 Mundy Street, Hackney, London, N1 6QT

Erection of two-storey extension above the existing roof to provide additional Use Class B1 (office / business) floorspace, external alterations to th...

Full Planning Permission Hackney
Yesterday Under Consultation HGY/2026/2656

1 Library Court 391 High Road Tottenham London N17 6QN

Replacement of the timber front and side elevation windows with double glazed 'slimline' timber windows with vertical sliding sash and casement window...

Full planning permission Haringey
Yesterday Under Consultation HGY/2026/2577

195 Albert Road Wood Green London N22 7AQ

Proposed single storey side/rear extension

Full planning permission Haringey
Yesterday REGISTERED: Under Consultation PA/2026/2852

33 Dene Avenue,Hounslow,TW3 3AQ

Ground floor rear extension 6.00 metres deep, maximum height 3.15 metres, 3.00 metres high to the eaves.

Prior Approval Larger Home Extension Hounslow
Yesterday Awaiting decision 26/503469/FULL

3 Sutton Heights Maidstone Kent ME15 8SF

Conversion of existing garage into habitable room.

Full Maidstone
Yesterday Pending Consideration 26/0418/FUL

Dimples Stainton Day Nursery, Low Lane, Middlesbrough, TS17 9LW

Single storey extension to classroom, entrance rearrangement and installation of play area

Full Planning Middlesbrough
Yesterday Pending Consideration 26/0440/FUL

7 - 11, Simpson Street, Middlesbrough, TS5 6HP

Single-storey side extension, external cladding, and internal alterations

Full Planning Middlesbrough
Yesterday Pending Consideration 2026/1394/01/HOU

5 Juniper Drive, Newcastle Upon Tyne, NE4 9BF

Erection of a single storey extension to side.

Household Applications Newcastle Upon Tyne
Yesterday Pending 26/02059/PREHH

350 Strone Road Manor Park London E12 6TN

Prior notification application for the construction of a single-storey ground floor rear extension. The details submitted are as follows: The proposed...

Prior Approval Householder Application Newham
Yesterday Pending 26/02102/HH

28 Eastern Road Plaistow London E13 9HX

Erection of single storey ground floor rear and first floor rear extension.

Householder Application Newham
Yesterday Pending 26/02111/PREHH

34 Claughton Road Plaistow London E13 9PN

Prior notification application for the construction of a single-storey ground floor rear extension. The details submitted are as follows: The proposed...

Prior Approval Householder Application Newham
Yesterday Pending 26/02130/HH

23 Navarre Road East Ham London E6 3AQ

Erection of single storey ground floor rear extension.

Householder Application Newham
Yesterday Pending 26/02132/HH

140 Upton Park Road Forest Gate London E7 8LB

Erection of single storey ground floor rear and side infill extension.

Householder Application Newham
Yesterday Under assessment 2512/26

82, Wanstead Park Avenue, WANSTEAD, London, E12 5EF

Demolish single storey rear extensions. Single storey rear extension. (Summary).

Full Planning Permission Redbridge
Yesterday Under assessment 2625/26

20, Wolsey Gardens, Hainault, Ilford, IG6 2SN

Single storey rear extension. (Summary).

Householder Redbridge
Yesterday Pending 26/03781/AMP

Craven Cottage Cleeton St Mary Kidderminster Shropshire DY14 0QL

Amendments to planning permission No. 26/00624/FUL (provision of boarded storage area within roof space and installation of internal stairs, windows i...

Shropshire
Yesterday Registered application P/21052/003

43, Anthony Way, Slough, SL1 5PQ

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

Full Planning Slough
Yesterday Registered application Y/04903/002

25, Newton Close, Slough, SL3 8DD

The erection of a single storey rear extension, which would extend beyond the re

Permitted Development with Consultation Slough
Yesterday Registered application P/08479/003

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

Retrospective application for the retention of a single storey rear extension bu

Full Planning Slough
Yesterday Pending 2026/1227

Ardenrun Lodge, Tandridge Lane, Lingfield, Surrey, RH7 6LL

Erection of a two storey side extension

Tandridge
Yesterday Pending 2026/1221

Redroofs, Felcourt Road, Felcourt, East Grinstead, Surrey, RH19 2LF

Demolition of the existing conservatory and its replacement with a permanent extension, together with a increase in the depth of the existing rear ext...

Tandridge
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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 extensions planning applications anywhere in the UK?
Yes. Click the "Set up alerts" button on this page and you'll get a daily (or weekly) email listing every new extensions application submitted anywhere in the UK. No need to pick a postcode or draw a map - pick the category once, choose your frequency, and we'll do the rest.

Extensions planning applications elsewhere

Data updated daily across all UK active councils.