House extensions in Derry and Strabane

Derry and Strabane received 282 householder applications in the last 12 months - about 5 a week. Rear extensions and side extensions are the most common. Of the 171 decided so far, 170 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 71 applications
23 Oct 2026 Consultation Open LA11/2026/0754/F

60 Glenelly Road, Plumbridge, BT79 8BN

Proposed single storey rear extension to existing dwelling house

Full Derry And Strabane
23 Oct 2026 Consultation Open LA11/2026/0776/F

5 Ballybeeny Road, Strabane, BT82 0DF

Two storey front extension

Full Derry And Strabane
23 Oct 2026 Consultation Open LA11/2026/0777/F

24 Talbot Park, Londonderry, BT48 7TA

Demolition of existing garage and proposed 2 storey side extension with integrated garage and single storey rear extension

Full Derry And Strabane
22 Oct 2026 Consultation Open LA11/2026/0769/F

59 Castlegrange Park, Strabane, BT82 9WB

Single storey rear extension

Full Derry And Strabane
21 Oct 2026 Valid LA11/2026/0743/F

Austin & Co Ltd 2-6 The Diamond Londonderry BT48 6HR

Proposed change of use from former Austin's department store to Class D1 (community, recreation and culture) use, providing a cultural hub building, c...

Full Derry And Strabane
20 Oct 2026 Consultation Open LA11/2026/0768/F

84 Birch Hill, Belt Road, Londonderry, BT47 2FJ

Single storey rear extension to dwelling

Full Derry And Strabane
20 Oct 2026 Consultation Open LA11/2026/0758/F

14 Dunnwood Park, Londonderry, BT47 2NN

Conversion of attached garage to living accommodation

Full Derry And Strabane
16 Oct 2026 Consultation Open LA11/2026/0755/F

121 Ardnamoyle Park, Londonderry, BT48 8HW

Proposed single storey rear extension to provide ground floor shower room & lobby with new external steps.

Full Derry And Strabane
14 Oct 2026 Consultation Open LA11/2026/0751/F

5 Summer Meadows Manor, Londonderry, BT47 6SE

Proposed single storey front and rear extensions and detached single storey garage

Full Derry And Strabane
13 Oct 2026 Consultation Open LA11/2026/0732/F

16 Orr Park, Newtownstewart, BT78 4BH

Proposed single storey rear extension

Full Derry And Strabane
13 Oct 2026 Consultation Open LA11/2026/0745/F

21 Lismore Grove, Strabane, BT82 9FT

Proposed single storey rear extension to dwelling.

Full Derry And Strabane
9 Oct 2026 Withdrawn LA11/2026/0742/LBC

Austin & Co Ltd 2-6 The Diamond, Londonderry, BT48 6HR

Proposed change of use from former Austin's department store to Class D1 (community, recreation and culture) use, providing a cultural hub building, c...

Listed Building Consent Derry And Strabane
8 Oct 2026 Consultation Open LA11/2026/0739/F

Church Hall 15 Cregg Road, Londonderry, BT47 4HX

Proposed side extension and internal alterations to existing Church hall

Full Derry And Strabane
8 Oct 2026 Consultation Open LA11/2026/0717/F

118 Racecourse Road, Shantallow, Londonderry, BT48 8NF

Proposed single storey bedroom and porch extensions to front and side of dwelling

Full Derry And Strabane
7 Oct 2026 Consultation Open LA11/2026/0731/F

31 Larkhill, Londonderry, BT48 8AT

Rear ground floor extension

Full Derry And Strabane
7 Oct 2026 Consultation Open LA11/2026/0723/F

5 St. Josephs Avenue, Londonderry, BT48 6TH

Proposed single storey rear extension to dwelling

Full Derry And Strabane
6 Oct 2026 Consultation Open LA11/2026/0729/F

101 Creggan Heights Londonderry BT48 9QU

Proposed rear extension to existing dwelling

Full Derry And Strabane
6 Oct 2026 Valid LA11/2026/0710/F

21 Rabstown Road Glentown, Clady, BT82 9RB

Proposed single storey garage/store/home office

Full Derry And Strabane
5 Oct 2026 Consultation Open LA11/2026/0690/F

Fountain Primary School 18 Hawkin Street Londonderry BT48 6RE

Retention of new secure external play area, retaining wall and covered play area canopy.

Full Derry And Strabane
5 Oct 2026 Consultation Open LA11/2026/0722/F

37 Bards Hill Gobnascale Londonderry BT47 2DR

Proposed Access Ramp & Handrail to Front of Dwelling

Full Derry And Strabane
2 Oct 2026 Consultation Open LA11/2026/0725/F

9 Butler Crescent Lisnahawley BT47 6XY

Single storey side and rear extension

Full Derry And Strabane
2 Oct 2026 Consultation Open LA11/2026/0703/F

14 Sevenoaks Crescent, Derry, BT47 6FJ

Loft conversion with dormer to the front

Full Derry And Strabane
1 Oct 2026 Valid LA11/2026/0713/NMC

Former Tillie & Henderson factory site bounded by Abercorn Road, Tillies Brae & Foyle Road, Derry, BT48 6SQ

Sub-station and associated electrical incoming relocated from Foyle Road to Abercorn Road including two number apartments swapped to accommodate the s...

Non Material Change Derry And Strabane
1 Oct 2026 Site Inspection Complete LA11/2026/0715/F

70 Coney Road, Londonderry, BT48 8JP

Proposed single storey front and rear extensions to dwelling

Full Derry And Strabane
1 Oct 2026 Consultation Open LA11/2026/0688/F

20 Central Drive, Derry, BT48 9QH

Proposed single storey extension to rear of existing dwelling & external platform lift with complimentary steps to front

Full Derry And Strabane
30 Sept 2026 Consultation Open LA11/2026/0708/F

23 Lisleen Road, Castlederg, BT81 7QN

Demolition of shed and erection of single storey extension to rear of dwelling house

Full Derry And Strabane
28 Sept 2026 Site Inspection Complete LA11/2026/0700/F

48 Tullymore Road, Londonderry, BT47 3DQ

Proposed ground floor side extension to dwelling and rear access ramp

Full Derry And Strabane
24 Sept 2026 Consultation Open LA11/2026/0699/F

35 Carmoney Park Campsie Londonderry BT47 3JN

Proposed single storey side extension to dwelling

Full Derry And Strabane
23 Sept 2026 Consultation Open LA11/2026/0697/F

36 Talbot Park, Londonderry, BT48 7TA

Ground floor bay window extension with first floor balcony extension above and the provision of a single storey garden room

Full Derry And Strabane
22 Sept 2026 Site Inspection Complete LA11/2026/0680/F

83 Westlake, Londonderry, BT47 6WE

Replacement of existing sunroom with two storey rear extension

Full Derry And Strabane
22 Sept 2026 Site Inspection Complete LA11/2026/0673/F

8 Lenamore Gardens, Londonderry, BT48 8LJ

Demolition of shed and erection of side, rear & front extension with detached garage

Full Derry And Strabane
22 Sept 2026 Consultation Open LA11/2026/0668/F

1 Grafton Street Londonderry BT48 0ER

Proposed first floor rear extension, internal alterations and revised layout at existing 5 Bed HMO

Full Derry And Strabane
22 Sept 2026 Consultation Open LA11/2026/0687/F

40 Main Street, Claudy, Londonderry, BT47 4HR

Demolition of existing garage and erection of replacement garage and single storey extension to dwelling

Full Derry And Strabane
18 Sept 2026 Consultation Open LA11/2026/0691/F

62 Clonmeen Drive, L'Derry

Proposed single storey rear extension to existing dwelling

Full Derry And Strabane
18 Sept 2026 Consultation Open LA11/2026/0665/F

32 Bracken Hill, Strabane, BT82 8FH

Proposed two storey side extension

Full Derry And Strabane
17 Sept 2026 Consultation Open LA11/2026/0686/F

Lands 350m NE of 42 Altinure Road Claudy BT47 4DB

Replacement dwelling and detached double garage

Full Derry And Strabane
17 Sept 2026 Site Inspection Complete LA11/2026/0672/F

11 Killycurry Road, Strabane, BT82 0JY

Proposed 2 storey side extension and single storey rear extension to dwelling

Full Derry And Strabane
17 Sept 2026 Site Inspection Complete LA11/2026/0667/F

22 Church Meadow, Londonderry, BT47 6DE

Proposed single storey rear extension to dwelling

Full Derry And Strabane
17 Sept 2026 Consultation Open LA11/2026/0670/F

23 Templeard Ballynagard Londonderry BT48 8FE

Proposed first floor extension above garage and single storey rear extension

Full Derry And Strabane
11 Sept 2026 Consultation Open LA11/2026/0654/F

15 Parkside Gardens, Sion Mills, BT82 9LT

Proposed single storey side extension & external alterations to include enclosed play area and ramp

Full Derry And Strabane
9 Sept 2026 Site Inspection Complete LA11/2026/0632/F

Lands approximately 43m south of no. 14 Airfield Road, Eglinton, Londonderry , BT47 3PZ

New dwelling, cover patio, double garage & associated site works

Full Derry And Strabane
7 Sept 2026 Consultation Open LA11/2026/0655/F

9 Ardfada, Ardmore, Londonderry, BT47 3WH

Proposed two storey rear extension to dwelling

Full Derry And Strabane
7 Sept 2026 Consultation Open LA11/2026/0646/RM

Lands directly N.E. of 280 Tamnaherin Road, L'Derry, BT47 3ND

Proposed one and a half storey detached dwelling and single storey detached garage

Reserved Matters Derry And Strabane
7 Sept 2026 Consultation Open LA11/2026/0649/F

3 Liskey Road, Strabane, BT82 8NW

Proposed single storey side extension to existing dwelling

Full Derry And Strabane
7 Sept 2026 Consultation Open LA11/2026/0648/F

94 Highmoor Road Londonderry BT47 3HR

Proposed one and a half storey side and single storey rear extensions to dwelling

Full Derry And Strabane
3 Sept 2026 Consultation Open LA11/2026/0650/F

5 Woodvale Mews, Eglinton, Derry, BT47 3FE

Single Storey Rear Extension

Full Derry And Strabane
3 Sept 2026 Consultation Open LA11/2026/0622/LBC

Austin & Co Ltd, 2-6 The Diamond, Derry, BT48 6HR

Proposed change of use from former Austin's department store to Class D1 (community, recreation and culture) use, providing a cultural hub building, ...

Listed Building Consent Derry And Strabane
2 Sept 2026 Consultation Open LA11/2026/0633/F

17 Eskaheen View, Derry, BT47 2EP

Proposed single storey side extension to existing dwelling

Full Derry And Strabane
25 Aug 2026 Consultation Open LA11/2026/0613/F

30 Ashleigh Court, Castlederg, BT81 7WA

Proposed single storey rear extension & single storey front porch

Full Derry And Strabane
25 Aug 2026 Consultation Open LA11/2026/0623/F

57 Beech Hill View Drumahoe BT47 3FU

Proposed single storey rear extension to dwelling

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

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