House extensions in North Northamptonshire

North Northamptonshire received 671 householder applications in the last 12 months - about 13 a week. Rear extensions and garage works are the most common. Of the 373 decided so far, 323 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 239 applications
Yesterday In progress 26/02097/HFUL

18 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary brick wall with piers and railings over PV panels on roof, replacement windows, new French doors to rear, external insulat...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02090/HFUL

5 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary brick wall with piers and railings; external insulated render; PV panels to front elevation replacement window and interna...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02096/HFUL

11 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary brickwall with piers and railings, PV panels to front elevation roof, replacement windows, new rear french doors, chimney ...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02062/HFUL

19 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary brick wall with piers and railings over PV panels on Roof replacement windows, new French doors to rear, external insulate...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02094/HFUL

16 Cambridge Street Rothwell NN14 6HB

Proposed front boundary brick wall with piers and railings over, PV panels to rear, replacement windows, new French doors to rear, external insulated ...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02093/HFUL

9 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary brick wall with piers and railings; PV panels to front elevation roof. Replacement windows, new French doors, chimney stac...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02471/HFUL

28 Cambridge Street Rothwell NN14 6HB

New front boundary wall and hoop top railings, external insulated render, PV panels, replacement doors and windows, and new french doors, internal alt...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02469/HFUL

26 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary walls and railings, external insulated render, PV panels, replacement doors and windows, new french doors to rear internal...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02479/HFUL

43 Cambridge Street Rothwell NN14 6HB

New front boundary wall and railings, external insulated render and brick effect, PV panels, replacement windows and doors, french doors and internal ...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02477/HFUL

41 Cambridge Street Rothwell NN14 6HB

New front boundary wall (Brick) and hoop top railings. External insulated render and brick affect. PV Panels, replacement doors and windows, french do...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02476/HFUL

33 Cambridge Street Rothwell NN14 6HB

New front boundary wall (brick) and hoop top railings, external insulated render, PV panels, replacement doors and windows, french doors and internal ...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02461/HFUL

21 Cambridge Street Rothwell NN14 6HB

PV Panels to front elevation roof replacement windows and doors external insulated render and internal alterations

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02465/HFUL

25 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary wall and railings external insulated render, PV panels to roof replacement windows and doors, new french doors and interna...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02462/HFUL

23 Cambridge Street Rothwell NN14 6HB

Proposed new front boundary wall and railings, external insulated render, PV panels to roof, replacement windows and doors, new first floor WC window ...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02473/HFUL

31 Cambridge Street Rothwell NN14 6HB

New front boundary wall (brick) and hoop top railings, external insulated render, PV panels, Elements doors and windows, internal alterations and fren...

Householder Planning Permission North Northamptonshire
Yesterday In progress 26/02587/HFUL

26 Grange Road Kettering NN16 8ES

Erection of a first floor side extension and conversion of the existing loft space to a habitable room with a rear dormer

Householder Planning Permission North Northamptonshire
2 days ago In progress 26/02089/HFUL

12 Cambridge Street Rothwell NN14 6HB

Proposed new boundary brick wall with piers and railings; new PV panels to rear roof; replacement windows, new French doors external insulated render ...

Householder Planning Permission North Northamptonshire
2 days ago In progress 26/02569/HFUL

12 Earls Barton Road Mears Ashby NN6 0DR

Ground and first floor extensions, alterations, and conversion

Householder Planning Permission North Northamptonshire
7 Sept 2026 In progress 26/01834/HFUL

3 Bridge Street Brigstock NN14 3ET

Installation of flood barriers and replacement back door for flood attenuation

Householder Planning Permission North Northamptonshire
7 Sept 2026 In progress 26/01649/HFUL

43 Kylesku Crescent Kettering NN15 5BH

Erection of a two-storey side extension and part single/part two-storey rear extension, including demolition of the existing garage

Householder Planning Permission North Northamptonshire
4 Sept 2026 In progress 26/02525/FUL

Studio 4 Diamond Business Centre Attley Way Irthlingborough NN9 5GF

Proposed mezzanine, air-conditioning, photo voltaic panels and internal works

Full Planning Permission North Northamptonshire
4 Sept 2026 In progress 26/02526/LBC

Studio 4 Diamond Business Centre Attley Way Irthlingborough NN9 5GF

Proposed mezzanine, air-conditioning, photo voltaic panels and internal works

Listed Building Consent North Northamptonshire
4 Sept 2026 In progress 26/02527/HFUL

Wantage House Harborough Road Braybrooke LE16 8LJ

Erection of a garden room extension, installation of new fencing and electric gates, erection of a detached double garage, repairs and repointng; repl...

Householder Planning Permission North Northamptonshire
4 Sept 2026 In progress 26/02528/LBC

Wantage House Harborough Road Braybrooke LE16 8LJ

Erection of a garden room extension, installation of new fencing and electric gates, erection of a detached double garage, repairs and repointng; repl...

Listed Building Consent North Northamptonshire
3 Sept 2026 In progress 26/02496/LBC

41A West Street Oundle PE8 4EJ

Single Storey Extension and Internal Alterations

Listed Building Consent North Northamptonshire
3 Sept 2026 In progress 26/02505/LDP

199 Northampton Road Wellingborough NN8 3PR

Loft conversion including construction of rear dormer

Lawful Development - Proposed North Northamptonshire
2 Sept 2026 In progress 26/02499/FUL

Harrowden Hall 1 The Slips Great Harrowden NN9 5AD

Installation of 3.6m wide gate within existing boundary wall and construction of 3.6m wide internal stone access track

Full Planning Permission North Northamptonshire
2 Sept 2026 In progress 26/02500/LBC

Harrowden Hall 1 The Slips Great Harrowden NN9 5AD

Installation of 3.6m wide gate within existing boundary wall and construction of 3.6m wide internal stone access track

Listed Building Consent North Northamptonshire
1 Sept 2026 In progress 26/02456/HFUL

12 London End Earls Barton NN6 0EZ

Erection of a timber framed garden room to rear elevation replacing existing garden room

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02457/LBC

12 London End Earls Barton NN6 0EZ

Erection of a timber framed garden room to rear elevation replacing existing garden room

Listed Building Consent North Northamptonshire
1 Sept 2026 In progress 26/02441/HFUL

8 Cross Road Wellingborough NN8 4AT

Demolish annex bungalow and associated structures. Erection of two detached ancillary buildings, associated landscaping, external works and parking

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02439/HFUL

46 Station Road Nassington PE8 6QB

Proposed erection of a new boat house, garden shed and the conversion of the existing garage

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02440/LBC

46 Station Road Nassington PE8 6QB

Proposed demolition of the existing boat house, erection of a new boat house, garden shed and the conversion of the existing garage

Listed Building Consent North Northamptonshire
1 Sept 2026 In progress 26/02443/LDP

24 Adams Close Wellingborough NN8 4EZ

Loft conversion

Lawful Development - Proposed North Northamptonshire
1 Sept 2026 In progress 26/02468/HFUL

29 West Street Kings Cliffe PE8 6XB

Garage/open car port, roof tile replacement, dormer cheek cladding replacement, amendments to layout and fenestration

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02195/HFUL

26 Roman Road Corby NN18 8GP

Proposal to replace fence to rear garden, to include retainer wall 800mm-1m high consisting of gravel board and post (concrete). POst will be in groun...

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02438/HFUL

5 Hatton Street Wellingborough NN8 5AS

Single storey flat roof rear extension. Single storey flat roof side infill extension. Loft conversion with rear dormer.

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02444/HFUL

24 Adams Close Wellingborough NN8 4EZ

Garage conversion

Householder Planning Permission North Northamptonshire
1 Sept 2026 In progress 26/02474/LBC

The Old Smithy Wakerley Road Harringworth NN17 3AH

Replacement of an existing gate with a heritage style, steel gate

Listed Building Consent North Northamptonshire
31 Aug 2026 In progress 26/02445/HFUL

11 Milton Road Little Irchester NN8 2DY

Single storey rear extension and internal alterations

Householder Planning Permission North Northamptonshire
28 Aug 2026 In progress 26/02367/LDP

1B School Hill Irchester NN29 7AN

Erection of 1.0 metre high gate and fence around the boundary of site facing road frontages

Lawful Development - Proposed North Northamptonshire
28 Aug 2026 In progress 26/02299/HFUL

76 Alexandra Street Burton Latimer NN15 5SF

Alterations and rear infill Extension

Householder Planning Permission North Northamptonshire
28 Aug 2026 In progress 26/02368/FUL

Home Farm House Lower Street Twywell NN14 3AH

Re-construction of the Grade II Listed Barn to be used as dwellinghouse, Construction of a Car Port, Demolition of a Modern Outbuilding and Provision ...

Full Planning Permission North Northamptonshire
28 Aug 2026 Awaiting decision 26/02367/LDE

1B School Hill Irchester NN29 7AN

Erection of 1.0 metre high gate and fence around the boundary of site facing road frontages

Lawful Development - Existing North Northamptonshire
28 Aug 2026 In progress 26/02435/FUL

12A Lilley Court Wellingborough NN8 2JL

Proposed partial change of use to Use Class E, including construction of single storey rear extension

Full Planning Permission North Northamptonshire
27 Aug 2026 In progress 26/02326/HFUL

88 Palk Road Wellingborough NN8 1HT

Retention of rear dormer extension as built and conversion of the loft to habitable accomodation

Householder Planning Permission North Northamptonshire
27 Aug 2026 In progress 26/02404/HFUL

33 Neale Avenue Kettering NN16 9HQ

Proposed single storey rear extension

Householder Planning Permission North Northamptonshire
27 Aug 2026 In progress 26/02428/FUL

14 Cedar Way Higham Ferrers NN10 8ES

Demolition, alteration and extension of existing detached bungalow to create two semi-detached dwellinghouses, including raising the roof ridge and as...

Full Planning Permission North Northamptonshire
27 Aug 2026 In progress 26/02238/FUL

3 Sharman Way Rothwell NN14 6JS

Erection of a detached double garage with ancillary storage

Full Planning Permission North Northamptonshire
27 Aug 2026 In progress 26/02274/HFUL

3 Oakley Road Pipewell NN14 1QY

Proposed single storey rear and single storey side extension

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

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