House extensions in Northumberland (County)

Northumberland (County) received 426 householder applications in the last 12 months - about 8 a week. Garage works and rear extensions are the most common. Of the 90 decided so far, 83 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

228 last 90 days
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76 last 30 days
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35 last 14 days

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Showing 50 of 228 applications
26/02421/FUL 9 Jul 2026 Pending

173 Middle Drive Darras Hall Ponteland Northumberland NE20 9LU

Proposed front porch, loft conversion with new front and rear dormers. Rebuild conservatory with double height space

Northumberland County 9 Jul 2026
26/02424/FUL 9 Jul 2026 Pending

2 Elm Road Ponteland Northumberland NE20 9BS

Proposed side extension to right-hand side of property incorporating an ensuite bathroom accessed via main bedroom and Storage room to be accessed via...

Northumberland County 9 Jul 2026
26/02409/FUL 8 Jul 2026 Pending

13 Curly Lane Lesbury Northumberland NE66 3QB

Proposed ground floor extension to create a utility room.

Northumberland County 8 Jul 2026
26/02402/CLPROP 8 Jul 2026 Pending

17 Greensfield Avenue Alnwick Northumberland NE66 1BE

Certificate of Lawful Development - Proposed single storey rear extension

Northumberland County 8 Jul 2026
26/02403/FUL 8 Jul 2026 Registered

10 West Drive Blyth Northumberland NE24 3QZ

Single storey rear and side extension incorporating garage, utility, sluice. The existing outbuildings, (outhouse and small garage) to be removed.

Northumberland County 8 Jul 2026
26/02404/FUL 8 Jul 2026 Pending

19 - 21 St Helens Street Corbridge Northumberland NE45 5BE

Replace roof and frame on existing conservatory

Northumberland County 8 Jul 2026
26/02381/FUL 7 Jul 2026 Pending

Land South East Of Bavington Hall Capheaton Northumberland

Construction of detached garage

Full Application Northumberland County 7 Jul 2026
26/02378/FUL 7 Jul 2026 Pending

5 Windmill Hill Close Ellington Northumberland NE61 5BS

Retrospective planning application for a 1.83m (6ft) timber boundary fence

Full Application Northumberland County 7 Jul 2026
26/02389/FUL 7 Jul 2026 Pending

White Oaks Woodhorn Old Road Woodhorn Village Northumberland NE63 9XX

Single storey extension to rear, raise roof height to form first floor extension. New windows and doors, and external materials.

Northumberland County 7 Jul 2026
26/02380/CLPROP 7 Jul 2026 Pending

68 Barnaby Way Jameson Manor Ponteland Northumberland NE20 0ES

Certificate of Lawful Development - Proposed development for a part garage conversion

Certificate of Lawful Proposed Devel Northumberland County 7 Jul 2026
26/02410/FUL 7 Jul 2026 Pending

159 New Ridley Road Stocksfield Northumberland NE43 7EX

Demolish garage and construct a new single storey extension.

Northumberland County 7 Jul 2026
26/02392/FUL 7 Jul 2026 Pending

Alexandra Park Alexandra Way Newbiggin-By-The-Sea Northumberland

Erection of external metal storage unit for garden maintenance equipment complete with electrical power supply. Building to be erected on existing con...

Northumberland County 7 Jul 2026
26/02387/CLPROP 7 Jul 2026 Pending

37 Burnhouse Road Wooler Northumberland NE71 6EQ

Certificate of Lawful Development - Proposed erection of a 750mm stone built wall to the front elevation of the property.

Northumberland County 7 Jul 2026
26/02388/FUL 7 Jul 2026 Pending

5 Albatross Place North Sea Manor Amble Northumberland NE65 0DP

Conversion of existing detached garage to form 1no. holiday let (short-term visitor accommodation) including associated alterations

Northumberland County 7 Jul 2026
26/02373/FUL 6 Jul 2026 Pending

22 Creighton Place Embleton Northumberland NE66 3FA

Rear elevation single storey extension

Full Application Northumberland County 6 Jul 2026
26/02374/FUL 6 Jul 2026 Pending

Chollerford Mill Humshaugh Hexham Northumberland NE46 4ET

Construction of detached garage

Full Application Northumberland County 6 Jul 2026
26/02358/AGRGDO 3 Jul 2026 Registered

Land At North Of Cockhill Plantation Ponteland Road Morpeth Northumberland

Notification of Prior Approval For a metal storage shed

Agricultural Determination Application Northumberland County 3 Jul 2026
26/02367/FUL 3 Jul 2026 Pending

99 Hartlands Bedlington Northumberland NE22 6JQ

Proposed removal of existing side outhouse and erection of new extension

Full Application Northumberland County 3 Jul 2026
26/02353/FUL 3 Jul 2026 Pending

45 Castle Street Warkworth Northumberland NE65 0UN

Alterations to the annex building to the rear of the property including revised window and door openings and new lantern rooflight. Refurbishment of b...

Northumberland County 3 Jul 2026
26/02360/FUL 3 Jul 2026 Pending

The Coach House Belvedere Terrace Alnwick Northumberland NE66 2NX

Construction of lean-to front porch

Full Application Northumberland County 3 Jul 2026
26/02351/CLPROP 3 Jul 2026 Pending

20 Ghyll Edge Lancaster Park Morpeth Northumberland NE61 3QZ

Certificate of Lawful Development - Proposed development for the removal of the existing outbuilding and the erection of a replacement detached timber...

Certificate of Lawful Proposed Devel Northumberland County 3 Jul 2026
26/02355/LBC 2 Jul 2026 Registered

2 Denwick Court Bondgate Without Alnwick Northumberland NE66 1PP

Listed Building Consent: remove internal wall between bathroom and WC and block existing WC doorway to combine rooms into larger bathroom

Listed Building Consent Northumberland County 2 Jul 2026
26/02362/FUL 2 Jul 2026 Registered

36 Highburn Stonelaw Grange Cramlington Northumberland NE23 6BE

Retrospective : Replacement rear conservatory

Full Application Northumberland County 2 Jul 2026
26/02333/FUL 2 Jul 2026 Registered

Swarland Hall Cottage Coast View Swarland Northumberland NE65 9JF

Dismantling, removing the rear, side extensions, associated works, construction of rear,side extensions with painted timber external joinery, conserva...

Northumberland County 2 Jul 2026
26/02325/FUL 1 Jul 2026 Registered

1 Milburn Close Hexham Northumberland NE46 2NY

Removal of existing garden room, first floor front and side extensions, rear two storey rear extension.

Full Application Northumberland County 1 Jul 2026
26/02319/FUL 1 Jul 2026 Registered

1 Ulgham Grange Crossing Ulgham Northumberland NE61 3AX

Erection of self-contained annex to be used as ancillary accommodation

Full Application Northumberland County 1 Jul 2026
26/02322/FUL 1 Jul 2026 Registered

19 Edgewood Hexham Northumberland NE46 1LQ

Erection of raised composite decking area to the rear, supported by timber frame, posts, joists, timber handrails, balustrading with an external stair...

Full Application Northumberland County 1 Jul 2026
26/02296/FUL 30 Jun 2026 Registered

29 Benlaw Grove Felton Northumberland NE65 9NG

Single storey rear/side extension

Full Application Northumberland County 30 Jun 2026
26/02294/FUL 30 Jun 2026 Registered

111 Waterloo Road Blyth Northumberland NE24 1DB

Two storey side extension, front bay window and alterations to the porch roof

Full Application Northumberland County 30 Jun 2026
26/02298/FUL 30 Jun 2026 Registered

Mount Hooley Farmhouse 7 Mount Hooley Berwick-Upon-Tweed Northumberland TD15 2PD

Installation of single storey orangery style extension to side elevation and entrance porch to front elevation.

Full Application Northumberland County 30 Jun 2026
26/02297/FUL 30 Jun 2026 Registered

98 Dene Road Wylam Northumberland NE41 8HB

Extension to front of dwelling to provide living space and replacement porch.

Full Application Northumberland County 30 Jun 2026
26/02299/FUL 30 Jun 2026 Registered

25 Upper Howick Street Alnwick Northumberland NE66 1UZ

Construction of box dormer to rear roof elevation

Full Application Northumberland County 30 Jun 2026
26/02312/FUL 30 Jun 2026 Registered

The Vergers Cottage Main Street Ponteland Newcastle Upon Tyne Northumberland NE20 9NR

Proposed 2.7m x 1.8m garden shed

Full Application Northumberland County 30 Jun 2026
26/02291/FUL 29 Jun 2026 Registered

2 Dunstan Square Dunstan Northumberland NE66 3TG

Replacement of an existing porch

Full Application Northumberland County 29 Jun 2026
26/02278/LBC 29 Jun 2026 Registered

Holly House 5 Main Street Corbridge Northumberland NE45 5LE

Listed Building Consent: Replacement and relocation of the existing gas-fired boiler including provision of new flue, Replacement of the existing gas-...

Listed Building Consent Northumberland County 29 Jun 2026
26/02264/FUL 26 Jun 2026 Registered

56 Beaumont Court Pegswood Northumberland NE61 6BF

Proposed single-storey rear extension

Full Application Northumberland County 26 Jun 2026
26/02249/FUL 25 Jun 2026 Registered

Dukesfield House Bamburgh Northumberland NE69 7AG

Extension of existing garage/storage area to provide ancillary accommodation to main dwelling

Full Application Northumberland County 25 Jun 2026
26/02255/FUL 25 Jun 2026 Registered

Holly Cottage Great Whittington Newcastle Upon Tyne Northumberland NE19 2HP

Installation of one conservation rooflight to North/rear and one to West. Replace one existing door and window with French doors and side windows to W...

Full Application Northumberland County 25 Jun 2026
26/02259/FUL 25 Jun 2026 Registered

9 Cromwell Grove West Thirston Northumberland NE65 9FX

Single storey extension to front and rear of existing bungalow

Full Application Northumberland County 25 Jun 2026
26/02270/FUL 25 Jun 2026 Registered

44 Parklands Darras Hall Ponteland Newcastle Upon Tyne Northumberland NE20 9LL

Demolition of conservatory and garage. New rear extension, garage and external alterations.

Full Application Northumberland County 25 Jun 2026
26/02246/FUL 24 Jun 2026 Registered

Tower House Market Place Corbridge Northumberland NE45 5AW

Proposed single storey rear extension with a flat roof construction, internal remodelling and the replacement of the existing front elevation glazed d...

Full Application Northumberland County 24 Jun 2026
26/02250/FUL 24 Jun 2026 Registered

16 Lindsey Close Beaconhill Glade Cramlington Northumberland NE23 8EJ

Proposed first storey side extension creating new bedroom

Full Application Northumberland County 24 Jun 2026
26/02245/FUL 24 Jun 2026 Registered

Main House Beech Close Newton Stocksfield Northumberland NE43 7UQ

Reinstatement of Main House, extension with residential annexe, detached garage, access courtyard, ancillary leisure facilities and a change of use of...

Full Application Northumberland County 24 Jun 2026
26/02229/FUL 24 Jun 2026 Registered

56 The Rise Darras Hall Ponteland Northumberland NE20 9LH

Reduced proposals to show new 7m high roof with dormer windows to form first floor bedrooms and bathrooms with 4m rear extension, front ground floor b...

Full Application Northumberland County 24 Jun 2026
26/02219/FUL 23 Jun 2026 Registered

33 Twyford Close Parkside Grange Cramlington Northumberland NE23 1PH

Dropped kerb to allow for new parking arrangement.

Full Application Northumberland County 23 Jun 2026
26/02235/CLPROP 23 Jun 2026 Registered

9 Redwood Rise Alnwick Northumberland NE66 2BZ

Certificate of Lawful Development - Proposed development for removal of garage door and replacement with full height window, internal lining of garage...

Certificate of Lawful Proposed Devel Northumberland County 23 Jun 2026
26/02227/FUL 23 Jun 2026 Registered

4 Harvey Close Hutton Park Blyth Northumberland NE24 5BF

Garage conversion, removing garage door and infiling with window.

Full Application Northumberland County 23 Jun 2026
26/02218/FUL 23 Jun 2026 Registered

63 Littlestone Wynd The Fairways Cramlington Northumberland NE23 8BF

Proposed single storey side extension

Full Application Northumberland County 23 Jun 2026
26/02216/FUL 23 Jun 2026 Registered

21 The Village Eglingham Northumberland NE66 2TX

Proposed single storey extension and the erection of a garden studio

Full Application Northumberland County 23 Jun 2026
26/02207/FUL 22 Jun 2026 Registered

2 Aydon Court Corbridge Northumberland NE45 5ER

Alterations to existing porch and replacement of existing windows

Full Application Northumberland County 22 Jun 2026
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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 — taller, larger, 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 with objections) can take longer.
Can I get email alerts for new extensions applications in Northumberland (County)?
Yes. Click "Set up alerts" on this page and you'll get a daily or weekly email listing every new extensions application published by Northumberland (County). You can also narrow the alert to a postcode, street, or drawn area.

We check Northumberland (County)'s planning portal daily. New extensions applications appear here within a day of being published.