House extensions in Newry Mourne Down

Newry Mourne Down received 357 householder applications in the last 12 months - about 7 a week. Garage works and rear extensions are the most common. All 41 decided so far 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 114 applications
23 Oct 2026 Valid LA07/2026/1254/F

30 Coniamstown Road Downpatrick BT30 8LX

Extension to dwelling with balcony access to existing first floor bedroom

Full Newry Mourne Down
21 Oct 2026 Valid LA07/2026/1271/F

Avalon, 53 Station Road, Saintfield BT24 7DZ

New extension to the rear of existing property. The extension does not project past the line of the existing dwelling.

Full Newry Mourne Down
21 Oct 2026 Valid LA07/2026/1275/F

9 Beechfield Park, Newcastle, BT33 0BD

Proposed single storey rear flat roof etension to dwelling

Full Newry Mourne Down
21 Oct 2026 Valid LA07/2026/1284/F

20 Greenpark Road, Newry, BT34 3EZ

Storage building for cars, pickup truck, tractor, and associated garden machinery and a sailing boat, with roof mounted solar panels.

Full Newry Mourne Down
20 Oct 2026 Valid LA07/2026/1193/F

34 Quarterland Road, Killinchy, Newtownards, BT23 6TX

Increase to site curtilage of no. 34 Quarterland Road, Killinchy including part retention, part demolition and alterations to existing building to for...

Full Newry Mourne Down
20 Oct 2026 Valid LA07/2026/1197/F

34 Inishmore, Corporation, Killyleagh, BT30 9TP

Extension to dwelling

Full Newry Mourne Down
20 Oct 2026 Valid LA07/2026/1255/RM

25 Derrywilligan Road, Newry, BT35 6JU

Dwelling and detached domestic garage

Reserved Matters Newry Mourne Down
20 Oct 2026 Valid LA07/2026/1288/F

1 St. Patricks Way, Downpatrick BT30 7DJ

Retrospective garden room - gym and home office - ancillary to existing dwelling

Full Newry Mourne Down
19 Oct 2026 Valid LA07/2026/1256/O

75m NW of 109 Head Road, Ballymartin, Newry, BT34 4PU

Dwelling and detached garage with access improvements

Outline Newry Mourne Down
19 Oct 2026 Valid LA07/2026/1253/F

3 Avoca Lawns, Warrenpoint, Newry, BT34 3RJ

Extensions and alterations to dwelling

Full Newry Mourne Down
19 Oct 2026 Valid LA07/2026/1261/F

5 Oliver Plunkett Park, Silverbridge, Newry, BT35 9LW

Rear extension to existing dwelling

Full Newry Mourne Down
19 Oct 2026 Valid LA07/2026/1280/F

56 Kinghill Avenue, Newcastle, BT33 0RU

Extension to dwelling

Full Newry Mourne Down
19 Oct 2026 Valid LA07/2026/1279/RM

100m south of 100 Drumnaconagher Road, Downpatrick, BT30 9JJ

Dwelling and Garage

Reserved Matters Newry Mourne Down
17 Oct 2026 Valid LA07/2026/1293/F

1 Forestbrook Avenue, Rostrevor, Newry, BT34 3BX

2 storey side extension with a single storey extension to rear of side extension to existing dwelling - Renewal of LA07/2021/1389/F

Full Newry Mourne Down
16 Oct 2026 Valid LA07/2026/1269/F

10 St Patricks Circle, Downpatrick, BT30 7JF

Extension to rear & side of existing dwelling

Full Newry Mourne Down
15 Oct 2026 Valid LA07/2026/1241/F

1 Fairview Park, Forkhill, Newry, BT35 9SP

Extension to dwelling

Full Newry Mourne Down
15 Oct 2026 Valid LA07/2026/1260/F

149a Castlewellan Road, Dromore, BT25 2LD

Conversion of existing Kitchen, Living and Utility Room to ancillary Granny Flat with a proposed single storey extension to the front of the existing ...

Full Newry Mourne Down
14 Oct 2026 Valid LA07/2026/1248/F

6 Cranny Road, Mullaghbawn, Newry, BT35 9RF

Extension to dwelling.

Full Newry Mourne Down
13 Oct 2026 Valid LA07/2026/1247/F

20 C Derrycraw Road, Newry, BT34 1RG

Retrospective erection of a greenhouse

Full Newry Mourne Down
12 Oct 2026 Valid LA07/2026/1240/F

9 Magheralone Road, Ballynahinch, BT24 8ND

Single storey rear extension to existing dwelling

Full Newry Mourne Down
12 Oct 2026 Valid LA07/2026/1252/F

25 Annsville, Newry, BT34 1AB

Extension, installation of rooflight, alterations and associated siteworks

Full Newry Mourne Down
9 Oct 2026 Valid LA07/2026/1246/F

19 Moyra Drive, Ballynahinch, BT24 7AF

Proposed two storey extension to the side of an existing semi-detached dwelling & conversion of existing garage

Full Newry Mourne Down
9 Oct 2026 Valid LA07/2026/1245/F

2 & 2a Shimna Parade, Newcastle, BT33 0EB

Retention of 2No dormer windows to rear of annex plus alterations to annex & cottage

Full Newry Mourne Down
8 Oct 2026 Valid LA07/2026/1243/F

17 Drumaness Walk, Downpatrick, BT30 6QQ

Plaster the gable wall to prevent damp in accordance with council abatement notice

Full Newry Mourne Down
8 Oct 2026 Valid LA07/2026/1222/F

29 Coney Island, Ardglass, BT30 7UQ

New access and drive off existing shared private drive

Full Newry Mourne Down
7 Oct 2026 Valid LA07/2026/1169/O

40m NW of 16 Lisleitrim Road, Cullyhanna, Newry, BT35 0JX

Replacement dwelling and detached garage. Formation of a new access with associated siteworks.

Outline Newry Mourne Down
7 Oct 2026 Valid LA07/2026/1221/F

Land 15m NW of 35 Altnadua Road Castlewellan BT31 9AP

Off-site replacement dwelling & detached garage

Full Newry Mourne Down
5 Oct 2026 Valid LA07/2026/1201/F

11 Blacks Lane, Ballynahinch, BT24 8UT

General renovations, rear extension & additional storey

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

92 Spa Road, Ballynahinch, BT24 8PP

Extension to dwelling

Full Newry Mourne Down
2 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 LA07/2026/1163/O

Land approximately 55m S of No. 221 Armagh Rd, Newry, BT35 6NW

Off-site replacement dwelling and detached garage

Outline Newry Mourne Down
29 Sept 2026 Valid LA07/2026/1172/F

9 Caiseal Heights, Newry, BT34 2TQ

Extension & alterations to dwelling

Full Newry Mourne Down
29 Sept 2026 Valid LA07/2026/1184/F

46 Ringdufferin Road, Toye, Downpatrick, BT30 9PH

Retention of change of use of former dwelling and outbuilding to self-contained holiday accommodation with alterations to external façade of dwelling,...

Full Newry Mourne Down
28 Sept 2026 Valid LA07/2026/1091/F

107 B Ballynoe Road, Downpatrick, BT30 8AJ

Proposed roofspace conversion, front & rear extension & remodelling works

Full Newry Mourne Down
28 Sept 2026 Valid LA07/2026/1153/F

5 Carrick Close Burren Newry BT34 3AT

Extension incorporating roof space conversion

Full Newry Mourne Down
28 Sept 2026 Valid LA07/2026/1145/F

No's 1-5 Bryansford Village, Bryansford, Newcastle, BT33 0PT

2no. replacement dwellings and alterations to existing dwelling to provide ancillary office associated with Bryansford Caravan Park, car parking, land...

Full Newry Mourne Down
28 Sept 2026 Valid LA07/2026/1171/F

84a Newtown Road, Camlough, Newry, BT35 7JN

Proposed Domestic Garage with Home Study Room and Home Gym

Full Newry Mourne Down
28 Sept 2026 Valid LA07/2026/1179/F

4 Shimna Vale, Newcastle, BT33 0EG

Retention of ground floor works and amendments to first floor extension

Full Newry Mourne Down
28 Sept 2026 Valid LA07/2026/1192/F

Laurel Lodge, 8 Strangford Road, Downpatrick, BT30 6SL

Extension to dwelling plus internal & external remodelling works to existing dwelling

Full Newry Mourne Down
23 Sept 2026 Valid LA07/2026/1148/F

9 Mourne View Park, Newcastle, BT33 0QR

Alteration to the existing garage to provide ancillary accommodation incidental to the enjoyment of the dwelling house

Full Newry Mourne Down
22 Sept 2026 Valid LA07/2026/1135/DCA

18 St. Marys Street, Newry, BT34 2AA

Change of Use of existing commercial building to provide 2 No. 1 bedroom apartments, demolition of existing single storey rear projection and proposed...

Conservation Area Consent Newry Mourne Down
22 Sept 2026 Consultation Open LA07/2026/1139/F

64 Ballyloughlin Road, Castlewellan, BT31 9HE

Placement of veranda over existing patio.

Full Newry Mourne Down
21 Sept 2026 Valid LA07/2026/1060/F

104 Drumnaquoile Road, Drumaroad, Ballynahinch, BT24 8QS

Replacement dwelling & detached garage

Full Newry Mourne Down
21 Sept 2026 Valid LA07/2026/1120/F

340m South West of 11 Blackrock Road, Crossmaglen, BT35 9BJ

Off-site replacement dwelling and garage, amended access and retention of existing dwelling for ancillary use

Full Newry Mourne Down
21 Sept 2026 Valid LA07/2026/1129/F

18 St. Marys Street, Newry, BT34 2AA

Change of Use of existing commercial building to provide 2 No. 1 bedroom apartments, demolition of existing single storey rear projection and proposed...

Full Newry Mourne Down
18 Sept 2026 Consultation Open LA07/2026/0915/LBC

56 Convent of Mercy St. Patrick's Avenue, Downpatrick, BT30 6DT

Consent to make safe the convent structure following fire damage

Listed Building Consent Newry Mourne Down
18 Sept 2026 Valid LA07/2026/1094/LBC

47 Merchants Quay, Newry, BT35 8HE

Retention, refurbishment, alterations to and change of use to 2 no. townhouses including the replacement of existing ground floor window with new full...

Listed Building Consent Newry Mourne Down
18 Sept 2026 Valid LA07/2026/1125/F

3 Railway Cottages, Newcastle, BT33 0LP

Retention of an existing domestic garden room and associated roof terrace

Full Newry Mourne Down
17 Sept 2026 Valid LA07/2026/1081/F

14 Glenveigh, Newry, BT35 8GL

Proposed single storey rear extension and replacement of garage door with window and assiciated works.

Full Newry Mourne Down
16 Sept 2026 Valid LA07/2026/1073/F

Lands at 65 Derryleckagh Road, Warrenpoint, Newry, BT34 3RB

Conversion of and extension to vacant mill buildings to provide residential development comprising 11no. apartments & proposed replacement, landscapin...

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

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