House extensions in Blackburn

Blackburn received 410 householder applications in the last 12 months - about 8 a week. Rear extensions and garage works are the most common. Of the 316 decided so far, 310 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 72 applications
21 Oct 2026 Pending Consideration 10/26/0899

12 Quebec Road, Blackburn, Blackburn With Darwen, BB2 7BZ

Proposed single storey side and rear extensions

Full Planning Application Blackburn
16 Oct 2026 Pending Consideration 10/26/0817

Stanley Street Mill Stanley Street Blackburn BB1 3BW

Erection of attached storage unit

Full Planning Application Blackburn
16 Oct 2026 Pending Consideration 10/26/0798

5 Cranberry Fold Court, Darwen, Blackburn With Darwen, BB3 2HX

Roof lift with conversion of roof from hip to gable and rear dormer

Full Planning Application Blackburn
15 Oct 2026 Pending Consideration 10/26/0787

10 Belvedere Road, Blackburn, Blackburn With Darwen, BB1 9NS

Erection of single storey rear extension and front and rear dormers

Full Planning Application Blackburn
14 Oct 2026 Pending Consideration 10/26/0856

4 Wyre Crescent, Darwen, Blackburn With Darwen, BB3 0JG

Proposed single storey side extension and new ramp and handrails to provide access to entrance

Full Planning Application Blackburn
14 Oct 2026 Pending Consideration 10/26/0866

29 Carham Road, Blackburn, Blackburn With Darwen, BB1 8NX

Proposed single storey front and rear extension, conversion of existing undercroft to habitable space and erection of outbuilding

Full Planning Application Blackburn
14 Oct 2026 Pending Consideration 10/26/0875

Hollybank Farm Punstock Lane Darwen

Erection of two-storey and single-storey extensions to the existing dwelling, together with external alterations, and alterations and extensions to th...

Full Planning Application Blackburn
13 Oct 2026 Pending Consideration 10/26/0870

141 Whinney Lane Blackburn

Erection of rear dormer and alterations of external materials from Pebble Dash to K-Render

Full Planning Application Blackburn
13 Oct 2026 Pending Consideration 10/26/0846

Mcdonald's, MCDONALDS RESTAURANTS LTD Burnley Road, Blackburn, Blackburn With Darwen, BB1 3HR

Erection of single storey extension to accommodate replacement drive thru booths, alterations to elevations with the relocation of the entrance door, ...

Full Planning Application Blackburn
12 Oct 2026 Pending Consideration 10/26/0867

6 Martindale Close, Blackburn, Blackburn With Darwen, BB1 1XH

Erection of a single storey side and rear wrap around extension

Full Planning Application Blackburn
9 Oct 2026 Pending Consideration 10/26/0801

2 Garden Street, Blackburn, Blackburn With Darwen

Retention of retaining walls along south and east site boundaries

Full Planning Application Blackburn
9 Oct 2026 Pending Consideration 10/26/0812

25 Park Lee Road, Blackburn, Blackburn With Darwen, BB2 3NZ

Erection of single storey extension to rear.

Full Planning Application Blackburn
8 Oct 2026 Pending Consideration 10/26/0865

5 Wycollar Road, Blackburn, Blackburn With Darwen, BB2 7AZ

Proposed insertion of dormers to various elevations including AC condensers.

Full Planning Application Blackburn
6 Oct 2026 Pending Consideration 10/26/0868

33 Gib Lane, Livesey, Blackburn, Blackburn With Darwen, BB2 5BP

Single storey rear extension and associated internal works

Full Planning Application Blackburn
6 Oct 2026 Pending Consideration 10/26/0874

18 Seacole Close, Blackburn, Blackburn With Darwen, BB1 2RA

Erection of single storey rear extension

Full Planning Application Blackburn
1 Oct 2026 Pending Consideration 10/26/0849

5 Cherryclough Way, Livesey, Blackburn, Blackburn With Darwen, BB2 4QX

Erection of single storey extension to side following removal of garage canopy roof

Full Planning Application Blackburn
30 Sept 2026 Pending Consideration 10/26/0854

34 Glenshiels Avenue, Hoddlesden, Darwen, Blackburn With Darwen, BB3 3LS

Demolition of an existing garage, erection of a two storey side and rear extension, and new porch to the front.

Full Planning Application Blackburn
29 Sept 2026 Pending Consideration 10/26/0847

2 Woodville Road, Blackburn, Blackburn With Darwen, BB1 5NU

Change of use of land to residential garden (C3) (Retrospective), removal of dilapidated 2.4m high existing timber fence to rear, and replacement with...

Full Planning Application Blackburn
29 Sept 2026 Pending Consideration 10/26/0848

346 Chapeltown Road, Turton, Bolton, Blackburn With Darwen, BL7 0EJ

Proposed first floor rear and side extension including internal alterations

Full Planning Application Blackburn
29 Sept 2026 Pending Consideration 10/26/0828

27 Audley Lane, Blackburn, Blackburn With Darwen, BB1 1LT

Single storey rear extension

Full Planning Application Blackburn
29 Sept 2026 Pending Consideration 10/26/0749

OAKWOOD Whitehall Road, Darwen, Blackburn With Darwen, BB3 2LH

Removal of catslide roof and dormer and erection of first floor extension above existing garage, front extension to garage, single storey front porch ...

Full Planning Application Blackburn
28 Sept 2026 Approved week of 26 Oct 10/26/0850

40 Cornelian Street, Blackburn, Blackburn With Darwen, BB1 9AW

Erection of single storey extension to rear. 4.5m from original rear wall, Max Height: 3.1m, Height to Eaves: 2.350m

Blackburn
24 Sept 2026 Pending Consideration 10/26/0833

PRIORY VIEW, 6 Geddes Street, Blackburn, Blackburn With Darwen, BB2 5LQ

Proposed single storey extension to rear of property and minor external alterations

Full Planning Application Blackburn
23 Sept 2026 Pending Consideration 10/26/0831

35 Cravens Heath, Blackburn, Blackburn With Darwen, BB2 4JB

Demolition of existing porch. Proposed new porch

Full Planning Application Blackburn
22 Sept 2026 Pending Consideration 10/26/0826

2 Warrenside Close, Blackburn, Blackburn With Darwen, BB1 9PF

Single storey rear extension with roof lantern, erection of rear dormer and internal alterations

Full Planning Application Blackburn
22 Sept 2026 Pending Consideration 10/26/0829

GREENWAYS Beardwood Brow, Blackburn, Blackburn With Darwen, BB2 7AT

Erection of single storey rear extension

Certificate of Lawfulness [Proposed] Blackburn
22 Sept 2026 Pending Consideration 10/26/0822

19 Moss Gate, Blackburn, Blackburn With Darwen, BB1 5HS

Erection of porch to front to provide shower room

Full Planning Application Blackburn
21 Sept 2026 Approved 16 Oct 10/26/0825

118 Fecitt Brow, Blackburn, Blackburn With Darwen, BB1 2AT

Demolition of existing outrigger and erection of single storey extension to rear. 6.0m from original rear wall, Max Height: 3.7m, Height to Eaves: 2.6...

Householder Notification - Single storey rear extension Blackburn
21 Sept 2026 Pending Consideration 10/26/0760

43 Greenhead Avenue, Blackburn, Blackburn With Darwen, BB1 5PR

Double storey side extension

Full Planning Application Blackburn
18 Sept 2026 Pending Consideration 10/26/0821

FOUR WINDS Broken Stone Road, Blackburn, Blackburn With Darwen, BB3 0LL

Alterations to fenestration at ground floor level, introduction of rooflights to rear elevation and construction of new front porch

Certificate of Lawfulness [Proposed] Blackburn
17 Sept 2026 Pending Consideration 10/26/0815

DRUMMER STOOPS COTTAGE Roman Road, Hoddlesden, Darwen, Blackburn With Darwen, BB3 3PR

Demolition of existing garage and construction of new garage to match previously approved scheme (ref 10/26/0306)

Full Planning Application Blackburn
15 Sept 2026 Approved 15 Oct 10/26/0813

19 Brackenwood, Blackburn, Blackburn With Darwen, BB1 8NE

Garage conversion & new porch 2.2m x 1.65L

Full Planning Application Blackburn
15 Sept 2026 Approved 7 Oct 10/26/0706

7 Whitehall Road, Blackburn, Blackburn With Darwen, BB2 6DU

Erection of single storey extension to rear. 6m from original rear wall, Max Height: 3.3m, Height to Eaves: 2.5m

Householder Notification - Single storey rear extension Blackburn
14 Sept 2026 Pending Consideration 10/26/0805

39 East Park Avenue, Blackburn, Blackburn With Darwen, BB1 8DT

Ground floor rear extension, alterations to roof and erection of side dormers

Full Planning Application Blackburn
11 Sept 2026 Pending Consideration 10/26/0797

16 Beech Grove, Blackburn, Blackburn With Darwen, BB3 0AP

Single Storey Rear Extension

Full Planning Application Blackburn
10 Sept 2026 Approved 19 Oct 10/26/0781

2 Lower Pole Walk, Darwen, Blackburn With Darwen, BB3 3FZ

Conversion of garage to a granny-annex with single storey extension

Full Planning Application Blackburn
8 Sept 2026 Pending Consideration 10/26/0789

1 Arnold Close, Blackburn, Blackburn With Darwen, BB2 3AJ

Two storey rear extension

Full Planning Application Blackburn
4 Sept 2026 Pending Decision 10/26/0776

21 Rosa Way, Blackburn, Blackburn With Darwen, BB1 8AQ

Conversion of garage to habitable room and driveway extension to provide additional parking space

Full Planning Application Blackburn
4 Sept 2026 Pending Consideration 10/26/0775

62 School Lane, Guide, Blackburn, Blackburn With Darwen, BB1 2LW

Erection of double storey extension to side with single storey extension to rear

Full Planning Application Blackburn
3 Sept 2026 Pending Decision 10/26/0778

415 Revidge Road, Blackburn, Blackburn With Darwen, BB1 8DF

Erection of single storey extensions to rear.

Full Planning Application Blackburn
3 Sept 2026 Pending Consideration 10/26/0758

3 Kings Drive, Hoddlesden, Darwen, Blackburn With Darwen, BB3 3RB

Proposed conversion of existing garage into 'granny flat' with raised roof height and side dormers

Full Planning Application Blackburn
3 Sept 2026 Approved 21 Oct 10/26/0763

5 Hollies Close, Livesey, Blackburn, Blackburn With Darwen, BB2 5AJ

Proposed single storey rear extension and re-location of first floor bedroom window

Full Planning Application Blackburn
3 Sept 2026 Approved 8 Oct 10/26/0777

18 Brackenwood, Blackburn, Blackburn With Darwen, BB1 8NE

Conversion of existing garage to a habitable room.

Full Planning Application Blackburn
1 Sept 2026 Refused 12 Oct 10/26/0768

125 Whinney Lane, Blackburn, Blackburn With Darwen, BB2 7BX

Proposed two storey side and rear extension with part single storey rear extension and conversion of hipped roof profile into gable roof

Full Planning Application Blackburn
1 Sept 2026 Pending Consideration 10/26/0708

GARAGE REAR Hope Street, Blackburn, Blackburn With Darwen, BB2 1DY

Retention of single dwellinghouse (Use Class C3), together with rear dormer, external alterations and associated external works (retrospective)

Full Planning Application Blackburn
28 Aug 2026 Approved 19 Oct 10/26/0725

12 - 12a, TEMPLE Roman Road, Hoddlesden, Darwen, Blackburn With Darwen, BB3 3PS

Demolition of existing garage and shed, roof lift to incorporate part single, part double storey rear extension and erection of detached double garage

Full Planning Application Blackburn
27 Aug 2026 Approved 6 Oct 10/26/0707

The View, 1, CUCKOLDMANS FARM Roman Road, Hoddlesden, Darwen, Blackburn With Darwen, BB3 3PP

Proposed single storey rear extension and detached garage

Full Planning Application Blackburn
27 Aug 2026 Pending Consideration 10/26/0624

JAAME-AL-HASHMI, 43 Copperfield Street, Blackburn, Blackburn With Darwen, BB1 1RB

Proposed single storey side and rear extension and external footpath improvements

Full Planning Application Blackburn
27 Aug 2026 Approved 21 Oct 10/26/0751

19 Whinney Lane, Blackburn, Blackburn With Darwen, BB2 7BX

Proposed single storey side extension and erection of front porch

Full Planning Application Blackburn
26 Aug 2026 Pending Consideration 10/26/0757

12 Hatton Trail, Darwen, Blackburn With Darwen, BB3 3GT

Erection of outbuilding (retrospective)

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

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