House extensions in Darlington

Darlington received 232 householder applications in the last 12 months - about 4 a week. Rear extensions and garage works are the most common. Of the 188 decided so far, 178 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 54 applications
19 Oct 2026 Awaiting decision 26/01025/FUL

19 Drury Street Darlington DL3 6NE

Replacement of existing roofs over rear kitchen and adjoining utility/store area with a pitched roof together with associated internal and external al...

Full Application Darlington
19 Oct 2026 Awaiting decision 26/00810/HPD

17 Oak Tree Close Middleton St George Darlington DL2 1HJ

Prior Approval for the erection of a single storey rear extension projecting 4.5m from the original dwelling house, 3.2m in height to ridge and 3m in ...

Householder Permitted Development Darlington
15 Oct 2026 Awaiting decision 26/01016/FUL

23 Westbourne Grove Darlington DL3 8LS

Erection of a single storey rear extension and associated works

Full Application Darlington
15 Oct 2026 Awaiting decision 26/00987/LBC

51-53 Coniscliffe Road Darlington DL3 7EH

Reopening of previously infilled doorways and alterations to stud walling

Listed Building Consent Darlington
14 Oct 2026 Awaiting decision 26/01012/PLU

87 Pendleton Road Darlington DL1 2YR

Erection of single storey extension to rear elevation

Proposed Lawful Use Darlington
14 Oct 2026 Awaiting decision 26/00964/FUL

478 North Road Darlington DL1 3AF

Demolition of existing single storey rear extension and erection of part single storey, part two storey extension to rear elevation

Full Application Darlington
13 Oct 2026 Awaiting decision 26/00961/FUL

44 Teesway Neasham Darlington DL2 1QU

Erection of a single storey rear extension and conversion of loft into habitable space with box dormer extension to rear and rooflights in front roof ...

Full Application Darlington
9 Oct 2026 Awaiting decision 26/00994/FUL

Foxlands Devonport Gardens Middleton One Row Darlington DL2 1AR

Removal of conservatory and erection of a single storey extension to the side elevation, window and door alterations including replacing dormer window...

Full Application Darlington
9 Oct 2026 Awaiting decision 26/00969/FUL

14 St Andrew's Park Sadberge Darlington DL2 1BF

Erection of single storey extension to rear elevation

Full Application Darlington
7 Oct 2026 Awaiting decision 26/00927/FUL

Southfields Farm Houghton Le Side Darlington DL2 2XH

Demolition of existing porch and erection of replacement single storey extension to the north elevation, alterations to the south elevation including ...

Full Application Darlington
7 Oct 2026 Awaiting decision 26/00646/FUL

Salters Bridge House Lime Lane Brafferton Darlington DL1 3NN

Erection of detached double garage to the south of the existing dwelling

Full Application Darlington
6 Oct 2026 Awaiting decision 26/00983/FUL

24 Neville Road Darlington DL3 8HY

Removal of conservatory and erection of a single storey rear extension

Full Application Darlington
29 Sept 2026 Awaiting decision 26/00922/FUL

17 Aldgrove Way Darlington DL3 0GR

Conversion of existing garage to habitable accommodation at front and garden store to the rear

Full Application Darlington
28 Sept 2026 Awaiting decision 26/00856/FUL

Braemar Cottage 31 The Green High Coniscliffe Darlington DL2 2LJ

Erection of a timber garage to the rear garden

Full Application Darlington
28 Sept 2026 Awaiting decision 26/00891/FUL

12 Minster Walk Hurworth Darlington DL2 2AR

Removal of conservatory and erection of a single storey rear extension

Full Application Darlington
25 Sept 2026 Awaiting decision 26/00946/HPD

29 Annandale Darlington DL1 3QX

Prior Approval for the erection of a single storey rear extension projecting 4.387m from the original dwelling house, 3.80m in height to ridge and 2.4...

Householder Permitted Development Darlington
25 Sept 2026 Awaiting decision 26/00905/FUL

The Cottage White House Farm Highside Road Heighington DARLINGTON DL2 2XQ

Erection of single storey extensions to south and east elevations, erection of a detached garage to the south of dwelling and associated internal and ...

Full Application Darlington
18 Sept 2026 Awaiting decision 26/00818/FUL

5 Balliol Court Darlington DL1 2YJ

Demolition of the existing conservatory to facilitate the erection of a single storey rear extension

Full Application Darlington
18 Sept 2026 Approved 24 Sep 26/00881/PLU

39 Woodland Road Darlington DL3 7BJ

Certificate of lawfulness for proposed development - replacement of roof coverings to front and rear pitched roof slopes and associated works

Proposed Lawful Use Darlington
16 Sept 2026 Awaiting decision 26/00886/FUL

1 Hummersknott Avenue Darlington DL3 8JX

Erection of a porch to the front elevation

Full Application Darlington
15 Sept 2026 Approved 19 Oct 26/00877/PLU

7 Blackthorn Drive Hurworth DARLINGTON DL2 2FU

Certificate of Lawfulness for proposed development - Erection of a single storey rear extension incorporating four rooflights together with the instal...

Proposed Lawful Use Darlington
15 Sept 2026 Approved 13 Oct 26/00898/PLU

Bishopsgate House Feethams Darlington DL1 5QE

Certificate of Lawfulness for proposed development - replace broken terracotta cladding panels with powder coated steel cladding panels on the lowest ...

Proposed Lawful Use Darlington
15 Sept 2026 Awaiting decision 26/00915/FUL

7 Pierremont Drive Darlington DL3 9LZ

Demolition of the rear bay window and erection of a single storey rear extension

Full Application Darlington
14 Sept 2026 Awaiting decision 26/00907/PLU

16 Marazion Drive Darlington DL3 0ZR

Certificate of Lawfulness for proposed development - siting of a mobile home for use ancillary to the main dwelling (annexe)

Proposed Lawful Use Darlington
14 Sept 2026 Awaiting decision 26/00909/FUL

100 Salutation Road Darlington DL3 8JP

Erection of a detached single-storey garden room to rear garden

Full Application Darlington
10 Sept 2026 Awaiting decision 26/00304/FUL

Little Burdon Farm Sadberge Darlington DL1 3JU

Refurbishment of the existing farmhouse and cottage, including subdivision and extension of farmhouse, to provide 3 No. dwellings, partial demolition ...

Full Application Darlington
10 Sept 2026 Awaiting decision 26/00854/FUL

64 Burnhope Lane Middleton St George DARLINGTON DL2 1FL

Conversion of existing garage into a home hair salon with associated internal alterations

Full Application Darlington
8 Sept 2026 Awaiting decision 26/00887/FUL

The Old Rectory Middleton Road Sadberge Darlington DL2 1RP

Erection of a detached garage and carport with first floor storage above garage

Full Application Darlington
7 Sept 2026 Approved 14 Oct 26/00871/PLU

71 Lunedale Road Darlington DL3 9AT

Certificate of Lawfulness for proposed development - Loft conversion including alterations to existing roof line forming a hip to gable roof incorpora...

Proposed Lawful Use Darlington
7 Sept 2026 Awaiting decision 26/00845/FUL

17 Mill Lane Redworth NEWTON AYCLIFFE DL5 6NP

Erection of detached one bed annexe building to rear garden

Full Application Darlington
4 Sept 2026 Awaiting decision 26/00878/FUL

83 Hutton Avenue Darlington DL1 2AH

Erection of single storey rear infil extension

Full Application Darlington
4 Sept 2026 Approved 13 Oct 26/00853/FUL

43 Lynton Gardens Darlington DL1 4PA

Demolition of the existing store and erection of a two-storey extension to the side elevation

Full Application Darlington
3 Sept 2026 Approved 21 Oct 26/00746/FUL

38 Parkland Drive Darlington DL3 9DU

Demolition of existing garage to front and conservatory to rear, erection of a single storey extension to the east elevation, single storey extension ...

Full Application Darlington
2 Sept 2026 Awaiting decision 26/00721/FUL

Oxney Cottage Croft Road Darlington DL2 2SD

Erection of an extension to the east elevation to provide workshop and garage to ground floor with annexe above, and incorporating new entrance featur...

Full Application Darlington
1 Sept 2026 Awaiting decision 26/00805/FUL

10 Chester Grove Darlington DL3 9DY

Erection of a two storey extension to the front (east) and side (north) elevations

Full Application Darlington
1 Sept 2026 Approved 22 Oct 26/00825/FUL

103 Merrybent Darlington DL2 2LF

Erection of a single storey rear extension

Full Application Darlington
28 Aug 2026 Approved 24 Sep 26/00835/HPD

41 Bates Avenue Darlington DL3 0TL

Prior Approval for the erection of a single storey rear extension projecting 3.375m from the original dwelling house, 3.9m in height to ridge and 2.90...

Householder Permitted Development Darlington
27 Aug 2026 Approved 20 Oct 26/00728/FUL

16 Crossfield Road Darlington DL3 0TR

Erection of a single storey rear infill extension (Retrospective Application)

Full Application Darlington
21 Aug 2026 Approved 13 Oct 26/00828/FUL

16A Pierremont Crescent Darlington DL3 9PB

Erection of conservatory to rear of dwelling

Full Application Darlington
14 Aug 2026 Approved 29 Sep 26/00759/FUL

6 Lych Gate Hurworth Darlington DL2 2AT

Erection of single storey rear exension

Full Application Darlington
12 Aug 2026 Approved 7 Oct 26/00791/FUL

Killerby Farm Killerby Darlington DL2 3UQ

Erection of extensions to the north and east elevations of the existing agricultural building

Full Application Darlington
10 Aug 2026 Approved 28 Aug 26/00727/PLU

28 High Stell Middleton St George Darlington DL2 1UW

Certificate of Lawfulness for proposed development - erection of a single storey rear extension

Proposed Lawful Use Darlington
10 Aug 2026 Approved 21 Sep 26/00735/FUL

11 Westbourne Grove Darlington DL3 8LS

Enlargement of loft to form habitable space including hip to gable extension and box dormer to rear. Construction of a detached sun lounge/garden room...

Full Application Darlington
7 Aug 2026 Approved 29 Sep 26/00773/FUL

8 Thames Way Darlington DL1 5TS

Erection of single storey rear extension

Full Application Darlington
7 Aug 2026 Awaiting decision 26/00731/FUL

Old Rectory Low Dinsdale Neasham Darlington DL2 1PN

Erection of single storey extension to south elevation and two storey extension to north elevation. Removal of existing first floor roof area to erect...

Full Application Darlington
7 Aug 2026 Approved 17 Aug 26/00663/PLU

9 The Green Hurworth Darlington DL2 2HA

Certificate of Lawfulness of proposed works to a Listed Building - replacement of lath and plaster lime ceilings

Proposed Lawful Use Darlington
6 Aug 2026 Approved 22 Sep 26/00733/FUL

5 New Lane Neasham Darlington DL2 1QR

Erection of a single storey rear extension and bay window extension to the front elevation

Full Application Darlington
4 Aug 2026 Awaiting decision 26/00755/FUL

Coatham Hall Farm Coatham Lane Coatham Mundeville Darlington DL3 0XL

Internal and external renovations and refurbishment together with the partial demolition and rebuild of the existing attached store room

Full Application Darlington
4 Aug 2026 Awaiting decision 26/00525/FUL

Foresters Arms Brafferton Lane Coatham Mundeville DL1 3LU

Conversion and extension of existing outbuildings to provide 2 No. one bed holiday cottages, installation of 2 No. holiday pods, and erection of ameni...

Full Application Darlington
4 Aug 2026 Approved 14 Sep 26/00725/FUL

Jasmine Cottage Barmpton Lane Barmpton Darlington DL1 3JG

Erection of a single storey extension to the west elevation

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

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