House extensions in North Northamptonshire

North Northamptonshire received 891 householder applications in the last 12 months - about 17 a week. Rear extensions and garage works are the most common. Of the 588 decided so far, 512 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 237 applications
23 Oct 2026 In progress 26/02994/PDE

6 Gretton Court Wellingborough NN8 5UD

Prior approval application for the erection of a single storey rear extension which will extend by a depth of 4.05m , max height of 3.8m and eaves of ...

Part 1, Class A - Larger House Extension North Northamptonshire
23 Oct 2026 In progress 26/02936/HFUL

204 Kingsley Avenue Kettering NN16 9EY

Single storey rear extension

Householder Planning Permission North Northamptonshire
23 Oct 2026 In progress 26/03039/HFUL

108 Gipsy Lane Kettering NN16 8UB

Erection of a two-storey side extension and single-storey rear extension following the demolition of the existing side garage and utility room

Householder Planning Permission North Northamptonshire
22 Oct 2026 In progress 26/03059/LBC

16 Church Street Easton On The Hill PE9 3LL

Replacement of existing double-glazed timber windows and external doors with new heritage-style double-glazed timber windows and doors, and installati...

Listed Building Consent North Northamptonshire
22 Oct 2026 In progress 26/03031/LBC

8 High Street Collyweston PE9 3PW

Construction of a free-standing oak frame with a glass roof to form a covered walkway along the rear elevation

Listed Building Consent North Northamptonshire
22 Oct 2026 In progress 26/03030/HFUL

8 High Street Collyweston PE9 3PW

Construction of a free-standing oak frame with a glass roof to form a covered walkway along the rear elevation

Householder Planning Permission North Northamptonshire
22 Oct 2026 In progress 26/03025/LDP

3 Prospect Avenue Irchester NN29 7DZ

Hip to gable roof alterations, loft conversion including rear dormer and conversion of existing garage

Lawful Development - Proposed North Northamptonshire
22 Oct 2026 In progress 26/02965/HFUL

30 Queen Street Bozeat NN29 7LA

Erection of a single storey garage down the side of the property linking into a porch out the front which will include a W/C.

Householder Planning Permission North Northamptonshire
22 Oct 2026 In progress 26/02509/FUL

General Store 4 Kettering Road Isham NN14 1HQ

Retention of an air con unit, canopy extension, bollards and in post parcel box

Full Planning Permission North Northamptonshire
22 Oct 2026 In progress 26/03024/LDP

122 Blenheim Walk Corby NN18 9HB

Erection of a three-storey rear extension, extending 3 metres beyond the rear elevation

Lawful Development - Proposed North Northamptonshire
21 Oct 2026 In progress 26/03021/HFUL

3 Sycamore Close Kings Cliffe PE8 6WZ

Erection of a single-storey side extension

Householder Planning Permission North Northamptonshire
20 Oct 2026 In progress 26/02853/HFUL

2 Arundel Court Kettering NN15 5NR

Extension to existing garage and conversion to habitable use

Householder Planning Permission North Northamptonshire
20 Oct 2026 In progress 26/03007/HFUL

The Folly Chelveston Road Stanwick NN9 6PU

Extension to the existing garage to create a private home gym

Householder Planning Permission North Northamptonshire
20 Oct 2026 In progress 26/02948/LDP

2 Oakway Wellingborough NN8 4SB

Certificate of lawfulness for a proposed detached L shaped garden outbuilding

Lawful Development - Proposed North Northamptonshire
19 Oct 2026 In progress 26/02975/HFUL

5 Saxon Rise Earls Barton NN6 0NY

Increase height of garage and convert to form habitable accommodation

Householder Planning Permission North Northamptonshire
19 Oct 2026 In progress 26/02938/FUL

264 Newton Road Rushden NN10 0SY

Amended highway access and proposed boundary wall and gates

Full Planning Permission North Northamptonshire
19 Oct 2026 In progress 26/02981/PDE

38 Green Lane Kettering NN16 0DA

Single-storey rear extension, extending 5m from rear wall with a maximum height of 3m and eaves height of 2.7m

Part 1, Class A - Larger House Extension North Northamptonshire
19 Oct 2026 In progress 26/02989/HFUL

4B Kettering Road Weldon NN17 3JQ

Single storey rear extension

Householder Planning Permission North Northamptonshire
19 Oct 2026 In progress 26/02954/LDP

67 Alexandra Road Wellingborough NN8 1EF

Rear ground floor extension, rear dormer and internal alterations to facilitate conversion to 6 bedroom HMO

Lawful Development - Proposed North Northamptonshire
19 Oct 2026 In progress 26/02827/LDP

3 Masefield Way Corby NN17 2NL

The proposal is to replace the existing front boundary fence with a new anthracite grey composite fence. The replacement fence will remain on the exis...

Lawful Development - Proposed North Northamptonshire
16 Oct 2026 In progress 26/02960/HFUL

79 Woodlands Road Irchester NN29 7BU

Single storey side extension

Householder Planning Permission North Northamptonshire
16 Oct 2026 In progress 26/02885/HFUL

29 Wallis Road Kettering NN15 6NY

Proposed First Floor Rear Extension

Householder Planning Permission North Northamptonshire
15 Oct 2026 In progress 26/02881/HFUL

1 Woodyard Close Rushton NN14 1RL

Single storey lounge stone and oak extension to rear of building

Householder Planning Permission North Northamptonshire
15 Oct 2026 In progress 26/02878/HFUL

4 Westfield Avenue Raunds NN9 6DQ

Erection of a single-storey rear extension and rear dormer roof extension

Householder Planning Permission North Northamptonshire
15 Oct 2026 In progress 26/02992/HFUL

53 Westminster Road Wellingborough NN8 5YS

Proposed side extension/infill

Householder Planning Permission North Northamptonshire
15 Oct 2026 In progress 26/02985/HFUL

118 Addington Road Irthlingborough NN9 5UP

Garage conversion and first floor rear extension

Householder Planning Permission North Northamptonshire
15 Oct 2026 In progress 26/02846/HFUL

405 St Johns Road Kettering NN15 5HH

Retrospective Concrete imprint Driveway With Proposed Acco Drain to soakaway

Householder Planning Permission North Northamptonshire
15 Oct 2026 In progress 26/02943/HFUL

25 Stanwell Way Wellingborough NN8 3DG

Demolition of existing conservatory, garage and outbuilding, and erection of a single-storey rear extension and detached garage

Householder Planning Permission North Northamptonshire
14 Oct 2026 In progress 26/02875/HFUL

Boughton Wood Lodge Boughton Wood Lodge Road Geddington NN14 1ED

Proposed ancillary garden room

Householder Planning Permission North Northamptonshire
14 Oct 2026 In progress 26/02939/LBC

46 Main Street Woodnewton PE8 5EB

Replacement front and back doors on a like for like basis

Listed Building Consent North Northamptonshire
14 Oct 2026 In progress 26/02815/FUL

Corby Innovation Hub Bangrave Road South Weldon NN17 1NN

External alterations including new windows, replacement fire-exit door, air-conditioning units and services, blackout film, and roof flue

Full Planning Permission North Northamptonshire
14 Oct 2026 In progress 26/02411/HFUL

372 St Johns Road Kettering NN15 5HF

Retrospective planning permission for raised decking at the rear of the dwelling including stair access and hand railings

Householder Planning Permission North Northamptonshire
13 Oct 2026 In progress 26/02865/HFUL

5 The Lane Easton On The Hill PE9 3LP

Demolish porch. Single-storey rear extension to south and west elevations, with window alteration to create new doorway access to living area. New sid...

Householder Planning Permission North Northamptonshire
12 Oct 2026 In progress 26/02813/FUL

4 Symmetry Way Kettering NN14 1FQ

Addition of 2.4m high weldmesh security fencing, matching swing gates, and automated rising barriers to match the existing provision on the site

Full Planning Permission North Northamptonshire
12 Oct 2026 In progress 26/02491/FUL

Land At 484500 283170 North Of Station Road Rushton

New stable block on existing paddock, resited gate entrance to site

Full Planning Permission North Northamptonshire
12 Oct 2026 In progress 26/02909/HFUL

17 Wellingborough Road Broughton NN14 1PD

Formation of a Vehicular Crossover and Front-Garden Parking Area

Householder Planning Permission North Northamptonshire
9 Oct 2026 In progress 26/02906/FUL

St Marys Church High Street Rushden NN10 0QE

Alterations to external levels to provide level access

Full Planning Permission North Northamptonshire
9 Oct 2026 In progress 26/02904/HFUL

14 Priory Road Wollaston NN29 7PW

Erection of a single-storey rear and side extension and alterations

Householder Planning Permission North Northamptonshire
9 Oct 2026 In progress 26/02900/HFUL

76 Glenfield Drive Great Doddington NN29 7TE

Erection of a single-storey rear extension and extended garden terrace

Householder Planning Permission North Northamptonshire
8 Oct 2026 In progress 26/02892/FUL

37 East Carlton Park East Carlton LE16 8YD

Change of use of land from public highway (footway) and hard standing to private residential driveway, parking and garden, ancillary to 37 East Carlto...

Full Planning Permission North Northamptonshire
8 Oct 2026 In progress 26/02877/HFUL

18 Trout Close Weldon NN17 3FY

Erection of a single-storey rear extension

Householder Planning Permission North Northamptonshire
8 Oct 2026 In progress 26/02870/HFUL

6 Springfield Road Wilbarston LE16 8QR

Installation of Four post vehicle lift to side garden (Retrospective)

Householder Planning Permission North Northamptonshire
8 Oct 2026 In progress 26/02863/LDP

15 Hortons Lane Thrapston NN14 4LD

Brick infill to existing porch, single storey brick extensions to the side and rear and pitched roof over existing garage

Lawful Development - Proposed North Northamptonshire
8 Oct 2026 In progress 26/02842/LDP

18 Salisbury Road Wellingborough NN8 1QF

6 Bedroom (6 Person) HMO (C4), single storey rear extensions, loft conversion with rear dormer and front velux windows

Lawful Development - Proposed North Northamptonshire
7 Oct 2026 In progress 26/02866/HFUL

25 Well Street Finedon NN9 5JP

Erection of a double-storey rear extension

Householder Planning Permission North Northamptonshire
7 Oct 2026 In progress 26/02864/HFUL

39 Eleanor Drive Wellingborough NN8 6BY

Conversion of an existing garage to habitable accommodation

Householder Planning Permission North Northamptonshire
7 Oct 2026 In progress 26/02874/LBC

Tansor Wold Farm House Tansor Wold Road Tansor PE8 6UX

Removal of wall between kitchen and rear passage and wall section between kitchen and family room. Reconfigure internal arrangement; kitchen and famil...

Listed Building Consent North Northamptonshire
7 Oct 2026 In progress 26/02803/FUL

Land South Of 228A Polwell Lane Polwell Lane Barton Seagrave

Erection of two detached bungalows and associated garages, and erection of a garage serving the existing bungalow

Full Planning Permission North Northamptonshire
7 Oct 2026 In progress 26/02588/HFUL

1 Alexander Place Irthlingborough NN9 5UX

Erection of a single-storey rear extension

Householder Planning Permission North Northamptonshire
6 Oct 2026 In progress 26/02819/FUL

4 Elton Street Corby NN17 5EY

Garage conversion, new window to front elevation, new bifold doors to side elevation

Full 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.