House extensions in Darlington

Darlington received 199 householder applications in the last 12 months - about 4 a week. Rear extensions and garage works are the most common. Of the 154 decided so far, 143 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 56 applications
Yesterday 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 Pending 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 Pending 26/00878/FUL

83 Hutton Avenue Darlington DL1 2AH

Erection of single storey rear infil extension

Full Application Darlington
4 Sept 2026 Pending 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 Pending 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 Pending 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 Pending 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 Pending 26/00825/FUL

103 Merrybent Darlington DL2 2LF

Erection of a single storey rear extension

Full Application Darlington
28 Aug 2026 Pending 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 Awaiting decision 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 Awaiting decision 26/00828/FUL

16A Pierremont Crescent Darlington DL3 9PB

Erection of conservatory to rear of dwelling

Full Application Darlington
14 Aug 2026 Awaiting decision 26/00759/FUL

6 Lych Gate Hurworth Darlington DL2 2AT

Erection of single storey rear exension

Full Application Darlington
12 Aug 2026 Awaiting decision 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 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 Awaiting decision 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 Awaiting decision 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 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 Awaiting decision 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 Awaiting decision 26/00725/FUL

Jasmine Cottage Barmpton Lane Barmpton Darlington DL1 3JG

Erection of a single storey extension to the west elevation

Full Application Darlington
29 Jul 2026 Approved 26/00736/CON

Polam Hall School Grange Road Blackwell DARLINGTON DL1 5PA

Part approval of details reserved by condition 3 (W.S.I) attached to Listed Building Consent 25/00872/LBC dated 16 Jan 2026 (Listed Building Consent f...

Discharge of Condition Darlington
29 Jul 2026 Approved 26/00732/FUL

1 Cranberry Way Darlington DL1 3FL

Erection of a porch providing new entrance on the south elevation, replace existing entrance door and canopy with window on the west elevation and rep...

Full Application Darlington
29 Jul 2026 Approved 26/00705/FUL

2 Barmpton Mews Darlington DL1 3SZ

Demolition of conservatory and erection of a single storey rear extension and additional ground floor window to side (west) elevation

Full Application Darlington
29 Jul 2026 Decided 26/00715/HPD

14 Burneston Court Darlington DL3 8UL

Prior notification for the erection of a single storey rear extension with flat roof and lantern window, which would extend beyond the rear wall of th...

Householder Permitted Development Darlington
23 Jul 2026 Approved 26/00673/FUL

12 Pondside Close Hurworth DARLINGTON DL2 2NN

Conversion of attached garage into habitable space with associated alterations and erection of single storey extension to side (south) elevation

Full Application Darlington
21 Jul 2026 Withdrawn 26/00709/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
16 Jul 2026 Approved 26/00634/FUL

8 Swinbridge Darlington DL2 2GB

Erection of single storey rear extension with sloping canopy extending over the proposed extension and the previously approved rear extension

Full Application Darlington
16 Jul 2026 Approved 26/00654/PLU

16 Easson Road Darlington DL3 6BB

Certificate of Lawfulness for proposed development - conversion of loft into habitable space with rear box dormer and 2 no. rooflights to front roof s...

Proposed Lawful Use Darlington
15 Jul 2026 Decided 26/00655/HPD

85 Brankin Drive Darlington DL1 4LH

Prior Approval for the erection of a single storey rear extension projecting 6.00m from the original dwelling house, 3.25m in height to ridge and 3.00...

Householder Permitted Development Darlington
14 Jul 2026 Approved 26/00695/FUL

31 Alexandria Drive Middleton St George Darlington DL2 1HG

Demolition of existing single storey flat roof side extension and erection of replacement single storey pitched roof side extension

Full Application Darlington
13 Jul 2026 Approved 26/00639/PLU

37 Cherrytree Drive School Aycliffe NEWTON AYCLIFFE DL5 6GG

Certificate of Lawfulness for proposed development - Erection of a single storey rear extension including three roof lights (amended description).

Proposed Lawful Use Darlington
13 Jul 2026 Decided 26/00651/HPD

100 Brinkburn Road Darlington DL3 6EB

Prior Approval for the erection of a single storey rear extension projecting 5.95m from the original dwelling house, 3.90m in height to ridge and 2.80...

Householder Permitted Development Darlington
9 Jul 2026 Awaiting decision 26/00614/FUL

17 The Rise Darlington DL3 8HD

Demolition of existing garage to east elevation and sunroom to north elevation to facilitate the erection of single storey extensions to north and eas...

Full Application Darlington
7 Jul 2026 Awaiting decision 26/00465/FUL

106 - 108 North Road Darlington DL1 2EQ

Erection of a single storey rear extension to facilitate the conversion of part of ground floor and first floor from storage/office accommodation to 4...

Full Application Darlington
6 Jul 2026 Approved 26/00664/FUL

13 Langholm Crescent Darlington DL3 7ST

Erection of single storey rear infill extension with external bench seating incorporated within projecting chamfered reveals

Full Application Darlington
6 Jul 2026 Approved 26/00617/FUL

85 Pendleton Road Darlington DL1 2YR

Demolition of the existing conservatory and erection of a replacement single storey side and rear extension

Full Application Darlington
6 Jul 2026 Awaiting decision 26/00601/FUL

6 Elder Brook Avenue Darlington DL2 1RD

Conversion of existing garage into a home hair salon with associated alteration works

Full Application Darlington
1 Jul 2026 Approved 26/00592/FUL

31 Marwood Crescent Darlington DL3 0JU

Demolition of existing rear conservatory and erection of a replacement single storey rear extension

Full Application Darlington
25 Jun 2026 Approved 26/00630/FUL

Vertu Vehicle Solutions Morton Road Darlington DL1 4PT

Erection of single storey extension to south/east elevation of existing vehicle workshop including associated external works

Full Application Darlington
25 Jun 2026 Refused 26/00518/FUL

Groundsmans House South Terrace Darlington DL1 5JD

Erection of boundary fence (Retrospective application)

Full Application Darlington
25 Jun 2026 Approved 26/00579/FUL

78 Merrybent Darlington DL2 2LE

Erection of a detached garage to the side (west) of the main dwelling

Full Application Darlington
24 Jun 2026 Approved 26/00624/PLU

9 Gibb Avenue Darlington DL1 1NQ

Certificate of Lawfulness for proposed use - Erection of a single storey rear extension including two roof lights together with the installation of a ...

Proposed Lawful Use Darlington
24 Jun 2026 Approved 26/00523/FUL

125 Hartington Way Darlington DL3 0RZ

Enlargement of existing garage to front elevation incorporating pitched roof above

Full Application Darlington
23 Jun 2026 Approved 26/00622/FUL

8 Muirkirk Grove Darlington DL1 3TL

Conversion of garage into habitable space with first floor extension above including juliet balcony to east elevation, erection of two story extension...

Full Application Darlington
23 Jun 2026 Approved 26/00440/FUL

1 Snipe Lane Darlington DL2 2SA

Demolition of existing single storey rear extension, detached garage and removal of poly tunnel and greenhouse to facilitate the erection of a single ...

Full Application Darlington
23 Jun 2026 Approved 26/00476/FUL

11 Crail Gardens Darlington DL1 3TF

Conversion of integral garage into habitable space

Full Application Darlington
22 Jun 2026 Approved 26/00556/FUL

25 Romanby Drive Darlington DL3 8EJ

Erection of wooden gazebo to rear garden

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.