House Extension planning applications in Northern Ireland

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.

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Showing 50 of 947 applications
2 days ago Valid LA01/2026/1075/F

13 Cappagh Grove, Portstewart

Addition of single storey flat roof extension to rear of property.

Full Causeway And Glens
2 days ago Consultation Open LA10/2026/0956/F

Immediately west 39 Greenmount Road, Beragh, Sixmilecross, Omagh, BT79 0QU

Proposed re-use, adaption ,alterations and extension of existing farm building and former dwelling, to self-catering holiday cottage for Agri-tourism ...

Full Fermanagh And Omagh
2 days ago Consultation Open LA02/2026/0724/F

30 Dunminning Road, Ballymena, BT42 1PE

Extension to existing Care Home to provide an additional 2No single storey bedrooms complete with ensuites

Full Mid East Antrim
5 Oct 2026 Valid LA10/2026/0949/F

31 Cashty Road, Omagh, BT78 5RH

Proposed single storey rear extension, to include new kitchen , living area, master bedroom and ensuite

Full Fermanagh And Omagh
5 Oct 2026 Valid LA05/2026/0781/F

19 Hunter's Chase, Lower Ballinderry, Lisburn, BT28 2BJ

End extesnion to dwelling

Full Lisburn And Castlereagh
4 Oct 2026 Consultation Open LA10/2026/0945/F

211 Derrylin Road, Gortdonaghy, Bellanaleck, Enniskillen, BT92 3AB

Proposed single storey gable extensions, increased site curtilage for amended access and internal works

Full Fermanagh And Omagh
2 Oct 2026 Valid LA11/2026/0725/F

9 Butler Crescent Lisnahawley BT47 6XY

Single storey side and rear extension

Full Derry And Strabane
2 Oct 2026 Valid LA10/2026/0944/NMC

Delta Quadrant 66 Rigg Road, Springfield, Enniskillen, BT74 5EF

External alterations to existing dwelling, comprising the replacement of existing render with cladding and painting of the remaining rendered elevatio...

Non Material Change Fermanagh And Omagh
2 Oct 2026 Under Consideration LA10/2026/0947/F

22 Inishative Road, Sixmilecross, BT79 9HS

Side extensions to existing dwelling

Full Fermanagh And Omagh
2 Oct 2026 Consultation Open LA10/2026/0941/F

42 Druminiskill Road, Enniskillen, BT92 3DX

Addition of a single-storey side extension

Full Fermanagh And Omagh
2 Oct 2026 Valid LA10/2026/0939/F

66 Botera Upper Road, Omagh, BT78 5LH

Alteration to existing dwelling to include new roof structure/covering, new windows & internal alterations

Full Fermanagh And Omagh
2 Oct 2026 Valid LA05/2026/0777/F

2 Antrim Road, Lisburn, BT28 3DH

Proposed detached single storey garage and garden room

Full Lisburn And Castlereagh
1 Oct 2026 Valid LA03/2026/0708/F

8 Craighill Manor, Ballyclare, BT39 9QA

Alterations and extension to dwelling

Full Antrim And Newtownabbey
1 Oct 2026 Consultation Open 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 Valid LA11/2026/0722/F

37 Bards Hill Gobnascale Londonderry BT47 2DR

Proposed Access Ramp & Handrail to Front of Dwelling

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 Consultation Open LA05/2026/0775/F

21 Fairfields Glen, Lisburn, BT28 3QL

Proposed two storey extension to the side of existing dwelling

Full Lisburn And Castlereagh
1 Oct 2026 Valid LA05/2026/0774/F

51 Dundrum Road, Dromore, BT25 2JH

Proposed single storey extension to front of property with internal alterations and level access to rear of property.

Full Lisburn And Castlereagh
1 Oct 2026 Valid LA05/2026/0779/F

33 Garvey Manor, Lisburn, BT27 4DQ

Two storey side extension

Full Lisburn And Castlereagh
1 Oct 2026 Awaiting decision LA09/2026/1012/F

27A Reenaderry Road Coalisland

Proposed extension and alterations to existing storage shed

Full Mid Ulster
1 Oct 2026 Valid LA07/2026/1213/F

25 Violet Hill Avenue, Newry, BT35 6DT

Extension to dwelling

Full Newry Mourne Down
1 Oct 2026 Valid LA07/2026/1210/F

92 Spa Road, Ballynahinch, BT24 8PP

Extension to dwelling

Full Newry Mourne Down
30 Sept 2026 Valid LA03/2026/0706/F

47 Main Street, Ballyclare, BT39 9AA

Retention of remodelling of rear return to include extension and alteration of roof line

Full Antrim And Newtownabbey
30 Sept 2026 Valid LA03/2026/0707/F

34 Crosshill Road, Crumlin, BT29 4BQ

Proposed single-storey extension to dwelling and retention of ancillary garden room building and decking

Full Antrim And Newtownabbey
30 Sept 2026 Consultation Open LA06/2026/0897/F

2 Ballymacormick Park, Bangor, BT19 6BX

Rear dormer

Full Ards And North Down
30 Sept 2026 Valid LA01/2026/1017/F

30 Strandview Avenue, Portstewart

Single storey side extension with internal alternations and partial removal of garage.

Full Causeway And Glens
30 Sept 2026 Valid LA01/2026/1050/F

29 Rose Park, Limavady

Rear single storey extension to provide additional living room space. Separate 1FL rear extension to provide additional bedroom. Associated hard lands...

Full Causeway And Glens
30 Sept 2026 Valid LA01/2026/1052/NMC

Lands at 23a Queens Park, Coleraine

Reconfiguration of internal first and roof floor plan to approved house type B

Non Material Change Causeway And Glens
30 Sept 2026 Valid LA01/2026/1054/NMC

Lands at 23a Queens Park, Coleraine

Reduced eaves and loft footprint, reconfiguration of internal first and roof floor plan, and minor amendments to fenestration to approved house type E

Non Material Change Causeway And Glens
30 Sept 2026 Valid LA01/2026/1053/NMC

Lands at 23a Queens Park, Coleraine

Reduced eaves and loft footprint, reconfiguration of internal first and roof floor plan, and minor amendments to fenestration to approved house type D...

Non Material Change Causeway And Glens
30 Sept 2026 Valid 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
30 Sept 2026 Valid LA11/2026/0710/F

21 Rabstown Road Glentown, Clady, BT82 9RB

Proposed single storey garage/store/home office

Full Derry And Strabane
30 Sept 2026 Under Consideration LA10/2026/0936/F

Located to the rear of 309 Whitebridge Road, Inisative, Carrickmore, BT79 9HL

Proposed extension to the existing Residential curtilage to enable the erection of a single-storey domestic store, home gym and home office

Full Fermanagh And Omagh
30 Sept 2026 Valid LA05/2026/0771/F

40 Ashbourne Park, Lisburn, BT27 4NS

Internal alterations and 2 storey gable extension to provide enlarged kitchen and snug at ground floor; enlarged bathroom and bedroom at first floor l...

Full Lisburn And Castlereagh
30 Sept 2026 Valid LA05/2026/0773/F

41 Rosneath Gardens, Belfast, BT16 1UN

New porch to front and rear extension

Full Lisburn And Castlereagh
30 Sept 2026 Consultation Open LA02/2026/0707/F

7b Craigstown Road Castlegore Ballymena BT42 3DF

Single storey extension to side of dwelling.

Full Mid East Antrim
30 Sept 2026 Awaiting decision LA09/2026/1009/F

12B Tullagh Road Cookstown

Replacement of dwelling and rear store

Full Mid Ulster
29 Sept 2026 Consultation Open LA03/2026/0701/F

12 Oriel Court, Antrim, BT41 4JT

Single storey rear extension

Full Antrim And Newtownabbey
29 Sept 2026 Valid LA08/2026/1062/F

28 Holly Hill, Dollingstown, Craigavon, BT66 7UB

Proposed attic conversion to provide additional bedroom and shower room, including roof dormer to rear of the dwelling

Full Armagh Banbridge Craigavon
29 Sept 2026 Consultation Open LA04/2026/1739/F

75 Bloomfield Road, Belfast, BT5 5LS

Rear dormer. Skylight to front.

Full Belfast
29 Sept 2026 Valid LA05/2026/0763/LBC

Sextons House, Main Street, Hillsborough, BT26 6AE

Refurbishment and internal alteration of Sexton’s House to facilitate its continued use as a multi-purpose community hall with tea and coffee faciliti...

Listed Building Consent Lisburn And Castlereagh
29 Sept 2026 Consultation Open LA05/2026/0769/F

8 Thorndale Road South, Belfast, BT8 8HN

Demolition of existing rear extension. Removal of existing chimney, rear dormer and entire roof. Addition of two-storey basement and ground floor exte...

Full Lisburn And Castlereagh
29 Sept 2026 Valid LA05/2026/0766/F

12 Carrisbrook Gardens, Lisburn, BT27 4PN

Level access and extending existing hardstand at front of property

Full Lisburn And Castlereagh
29 Sept 2026 Consultation Open LA02/2026/0708/F

41 McCareys Loanen, Larne, BT40 2DN

Single storey extension and internal structural alterations to domestic dwelling

Full Mid East Antrim
29 Sept 2026 Consultation Open LA02/2026/0705/F

53 Station Road Greenisland, Carrickfergus BT38 8UP

Proposed single storey rear extension and demolition of existing garage.

Full Mid East Antrim
29 Sept 2026 Consultation Open LA02/2026/0702/F

27 Linenhall Street Town Parks Ballymena BT43 5AJ

Proposed Frontage Upgrade to Windows & Removing Facing Brick to Render

Full Mid East Antrim
29 Sept 2026 Consultation Open LA02/2026/0718/F

116 Cloughwater Road, Ballymena, BT43 6SZ

Proposed alterations to existing dwelling to include closing over first floor rear facing window and provision of new dormer window to side elevation ...

Full Mid East Antrim
29 Sept 2026 Consultation Open LA02/2026/0723/F

Between 14 & 4 Ballycreggy Road, Ballymena, BT42 3HP

Change of house type to that approved under LA02/2026/0312/RM (resiting of dwelling, removal of garage and increase in ridge height from 6.5m above f...

Full Mid East Antrim
29 Sept 2026 Awaiting decision LA09/2026/1003/F

40 Mulderg Road Magherafelt

Single storey rear extension and alterations to dwelling and associated ground works

Full Mid Ulster
29 Sept 2026 Valid LA07/2026/1201/F

11 Blacks Lane, Ballynahinch, BT24 8UT

General renovations, rear extension & additional storey

Full Newry Mourne Down
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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 Northern Ireland?
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 Northern Ireland. 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 Northern Ireland's active councils.