House extensions in Belfast

Belfast received 706 householder applications in the last 12 months - about 14 a week. Rear extensions and side extensions are the most common. Of the 359 decided so far, 356 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 154 applications
23 Oct 2026 Consultation Open LA04/2026/1824/DCA

84 Balmoral Avenue, Belfast, BT9 6NY

Demolition of front boundary wall and fence.

Conservation Area Consent Belfast
20 Oct 2026 Consultation Open LA04/2026/1873/F

27 Ramoan Drive, Belfast, BT11 8LH

Proposed single storey side extension to accommodate a bedroom & utility space to existing dwelling

Full Belfast
20 Oct 2026 Consultation Open LA04/2026/1866/F

16 Onslow Gardens, Belfast, BT6 0AP

Dormer window to the rear and 2 roof lights to the front elevation

Full Belfast
19 Oct 2026 Consultation Open LA04/2026/1855/F

43 Frome Street, Belfast, BT4 1GJ

Two storey and single storey rear extension

Full Belfast
19 Oct 2026 Consultation Open LA04/2026/1857/F

7 Castlegowan Road, Belfast, BT5 7WP

Single Storey Side Extension

Full Belfast
19 Oct 2026 Consultation Open LA04/2026/1860/F

57 Connsbrook Avenue, Belfast, BT4 1JW

Single storey rear extension

Full Belfast
19 Oct 2026 Consultation Open LA04/2026/1776/F

1 Onslow Gardens, Belfast, BT6 0AP

Part demolition to roof, rear wall and gable wall. Two-storey and part single-storey rear extension. Alterations to the gable wall, including new grou...

Full Belfast
18 Oct 2026 Consultation Open LA04/2026/1859/F

121 Glen Road, Andersonstown, Belfast, BT11 8BJ

Proposed roof space conversion with rear dormer window.

Full Belfast
16 Oct 2026 Valid LA04/2026/1843/NMC

173 Upper Newtownards Road, Belfast, BT14 1AB

Internal reconfiguration from 20 no. to 15 no. apartments from planning approval LA04/2020/1363/F, with no change to the approved building footprint, ...

Non Material Change Belfast
16 Oct 2026 Consultation Open LA04/2026/1856/F

14 Orpen Park, Belfast, BT10 0BN

Single storey rear kitchen extension with raised patio. Attic conversion with rear dormer and single storey garden room / home office.

Full Belfast
16 Oct 2026 Consultation Open LA04/2026/1805/F

Kilnacarra, 71 Quarry Road, Belfast, BT4 2NQ

Single storey front extension/porch. First floor side extension. Window and chimney alterations.

Full Belfast
16 Oct 2026 Consultation Open LA04/2026/1814/F

St Gerards Roman Catholic Church, 722 Antrim Road, Newtownabbey, BT36 7PG

Single storey garage to rear of site No.56.

Full Belfast
15 Oct 2026 Consultation Open LA04/2026/1844/F

50 Finaghy Road South, Belfast, BT10 0DE

Single storey rear extension, rear patio and widening of existing vehicular access.

Full Belfast
15 Oct 2026 Consultation Open LA04/2026/1847/F

27 Knockvale Park, Belfast, BT5 6HJ

Single storey extension to side and rear

Full Belfast
15 Oct 2026 Consultation Open LA04/2026/1687/F

135 Forthriver Crescent, Belfast, BT13 3ST

Single storey rear extension

Full Belfast
15 Oct 2026 Consultation Open LA04/2026/1665/F

8 Downshire Parade, Belfast, BT6 9JR

Erection of a two-storey side extension and single-storey rear extension, with alterations to the front and gable elevations to provide new window & d...

Full Belfast
14 Oct 2026 Valid LA04/2026/1830/F

22 Ravenhill Park, Belfast, BT6 0DE

2 Storey rear & side extension, new rear roof dormer, internal and external alterations

Full Belfast
14 Oct 2026 Consultation Open LA04/2026/1831/F

38 Locksley Park, Belfast, BT10 0AR

Demolition of existing rear return and detached garage and construction of a single-storey rear and 2-storey rear and side extension.

Full Belfast
14 Oct 2026 Consultation Open LA04/2026/1826/F

6 Glenwood Green, Belfast, BT17 0QX

Single-storey rear extension with amendment to first-floor rear window.

Full Belfast
14 Oct 2026 Consultation Open LA04/2026/1828/F

32 Bladon Drive, Belfast, BT9 5JN

Erection of front boundary wall, installation of electric vehicular gates and pedestrian gate.

Full Belfast
13 Oct 2026 Consultation Open LA04/2026/1820/F

1 Burmah Street, Ballynafoy, Belfast, BT7 3AN

Single-storey rear extension

Full Belfast
13 Oct 2026 Consultation Open LA04/2026/1816/F

92 Orchardville Gardens, Belfast, BT10 0JX

Single-storey side extension, fenestration alterations to include bay window to front elevation, new window to rear elevation and patio doors to side ...

Full Belfast
12 Oct 2026 Consultation Open LA04/2026/1691/F

2a Lisdarragh Park, Belfast, BT14 8JB

New vehicular access and driveway

Full Belfast
12 Oct 2026 Consultation Open LA04/2026/1795/F

117 Kings Road, Belfast, BT5 7EF

Single-storey rear/side extension & rear dormer.

Full Belfast
9 Oct 2026 Consultation Open LA04/2026/1818/F

14 Old Coach Avenue, Belfast, BT9 5PY

Exterior alterations and fenestration changes to include removal of front elevation first floor terrace and patio doors and replace with new window, r...

Full Belfast
9 Oct 2026 Consultation Open LA04/2026/1819/F

84 Balmoral Avenue, Belfast, BT9 6NY

Demolition of existing front boundary wall and fence and erection of replacement boundary wall and pillars.

Full Belfast
9 Oct 2026 Consultation Open LA04/2026/1794/F

24 Irwin Drive, Belfast, BT4 3AR

Demolition of kitchen, store and garage. Replacement single-storey side/rear extension.

Full Belfast
7 Oct 2026 Consultation Open LA04/2026/1777/F

42 Laurelbank, Belfast, BT17 0RU

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

Full Belfast
6 Oct 2026 Valid LA04/2026/1774/NMC

141 Upper Dunmurry Lane, Dunmurry, Belfast, BT17 0EY

We are seeking to remove Juliet balcony and French doors to first and second floor of apartment block 3 and substitute with casement windows to match ...

Non Material Change Belfast
6 Oct 2026 Consultation Open LA04/2026/1667/F

15 Sicily Park, Belfast, BT10 0AJ

Single-storey rear extension and 2-storey rear and side extension.

Full Belfast
6 Oct 2026 Consultation Open LA04/2026/1646/F

Rosendale 9 Holland Park, Ballycloghan, Belfast, BT5 6HB

Lower ground floor rear and side extension. Addition of rear roof light, replacement rear window and addition of 2 No. side windows. New driveway gate...

Full Belfast
5 Oct 2026 Consultation Open LA04/2026/1780/F

3 Glensharragh Avenue, Belfast, BT6 9PD

Single storey side extension

Full Belfast
5 Oct 2026 Consultation Open LA04/2026/1760/F

Lands to the rear of 23 Malone View Road and south west of 26 Malone View Park, Belfast, BT9 5PH

Proposed dwelling with associated landscaping and car parking and a change in curtilage to existing dwelling at 23 Malone View Road.

Full Belfast
2 Oct 2026 Consultation Open LA04/2026/1668/F

16 Viewfort Park, Belfast, BT17 9JY

Two-storey rear extension, rear dormer, front dormer, roof and fenestrations alterations.

Full Belfast
1 Oct 2026 Consultation Open LA04/2026/1666/F

40 Lyndhurst Gardens, Belfast, BT13 3PH

single storey garden room

Full Belfast
29 Sept 2026 Valid LA04/2026/1763/LBC

7 & 8 Upper Crescent, Belfast, BT7 1NT

Proposed Renovation and Change of Use From Offices to Residential and New Dormers to Rear

Listed Building Consent Belfast
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 Consultation Open LA04/2026/1540/F

72 Beechgrove Avenue, Belfast, BT6 0NF

Proposed two storey side/rear extension.

Full Belfast
28 Sept 2026 Consultation Open LA04/2026/1737/F

19 Mountainview Gardens, Belfast, BT14 7GU

Single storey rear extension

Full Belfast
28 Sept 2026 Consultation Open LA04/2026/1730/F

25 Mooreland Park, Belfast, BT11 9AZ

Single storey rear kitchen and living room extension including new window to GF gable wall

Full Belfast
28 Sept 2026 Consultation Open LA04/2026/1731/F

10 Bristow Drive, Belfast, BT5 7QU

Two storey rear extension. Conversion of basement into ancillary accommodation. Replacement of rear door with window. Addition of 2 No. side windows t...

Full Belfast
27 Sept 2026 Consultation Open LA04/2026/1714/F

9 Sandown Park South, Belfast, BT5 6HE

Partial demolition to rear to accommodate single storey extension. Demolition of Garage.

Full Belfast
26 Sept 2026 Consultation Open LA04/2026/1729/F

9 Mill Valley Way, Belfast, BT14 8LH

Dormer window to the rear of dwelling.

Full Belfast
25 Sept 2026 Consultation Open LA04/2026/1722/F

43 Houston Park, Belfast, BT5 6AT

Enlargement and alterations to rear dormer previously approved under LA04/2025/1830/F

Full Belfast
25 Sept 2026 Consultation Open LA04/2026/1569/F

64 Campbell Park Avenue, Belfast, BT4 3FL

Two storey rear extension. Addition of pergolas and brise soleil. Partial demolition of rear wall to accommodate patio doors, new first floor window...

Full Belfast
25 Sept 2026 Consultation Open LA04/2026/1573/F

6 Dunlewey Street, Belfast, BT13 2QU

Two storey rear extension.

Full Belfast
25 Sept 2026 Consultation Open LA04/2026/1620/F

49 Ardenlee Gardens, Belfast, BT6 8QH

Demolition of existing single storey rear extension. Partial demolition of side walls to accomodate 1st floor and ground floor windows and new side do...

Full Belfast
24 Sept 2026 Consultation Open LA04/2026/1534/F

33 to 39 Gresham Street, Belfast, BT1 1JL

Conversion of the existing three-storey terraced building at nos. 33–39 Gresham Street to provide six short-term holiday-let apartments, including the...

Full Belfast
24 Sept 2026 Consultation Open LA04/2026/1597/DCA

19 Myrtlefield Park, Belfast, BT9 6NE

Demolition of conservatory and single storey rear extension, partial demolition of rear wall, windows and doors, roof of side extension and sections ...

Conservation Area Consent Belfast
24 Sept 2026 Consultation Open LA04/2026/1596/F

19 Myrtlefield Park, Belfast, BT9 6NE

Single storey rear extention, single storey garage with consultation room and enclosed outdoor space and 2 dormer windows with associated demolition. ...

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

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