House extensions in West Northamptonshire

West Northamptonshire received 924 householder applications in the last 12 months - about 18 a week. Rear extensions and garage works are the most common. Of the 681 decided so far, 624 were approved. If you're planning your own, the applications below show what people nearby applied for and how the council decided.

Date received
Get alerts for West Northamptonshire

Filter applications

Date receivedLast 90 days
Date receivedLast 90 days
Select one year, or two for a range.
Number of homesAny
StatusAny
Application routeAny
Application type1 selected
KeywordsNone
Match

Matches words or phrases in the application address and description.

Showing 50 of 160 applications
16 Oct 2026 4 - Consultations Despatched (1-10) 2026/4148/HH

57 Pleydell Road Northampton NN4 8NL

Single storey rear extension.

Householder Planning Permission West Northamptonshire
14 Oct 2026 4 - Consultations Despatched (1-10) 2026/3993/HH

34 Oaklands Drive Northampton NN3 3JL

Proposed garage conversion with new entrance porch and extended roof over dwelling

Householder Planning Permission West Northamptonshire
14 Oct 2026 4 - Consultations Despatched (1-10) 2026/3826/HH

15 Church Street Cogenhoe NN7 1LS

Replace all windows, add solar panels and rooflight, re-roof pantile roof to be slate.

Householder Planning Permission West Northamptonshire
14 Oct 2026 4 - Consultations Despatched (1-10) 2026/4112/HH

Field Head 16 The Avenue Dallington Northampton NN5 7AN

Removal of existing conservatory located at the rear of the property and replace with a new single storey orangery style extension and all assocated w...

Householder Planning Permission West Northamptonshire
13 Oct 2026 4 - Consultations Despatched (1-10) 2026/4083/HH

5 Horton Road Hackleton NN7 2AW

Single storey front and rear extension and partial basement following demolition of existing rear extension

Householder Planning Permission West Northamptonshire
13 Oct 2026 3 - Case Officer Allocated (1-10) 2026/3593/HH

39 Manor Road Daventry NN11 4EF

Replacement porch to front elevation.

Householder Planning Permission West Northamptonshire
9 Oct 2026 4 - Consultations Despatched (1-10) 2026/3549/HH

The White House 36 Manor Road Pitsford NN6 9AR

Replacement of all doors and windows on all elevations to traditional timber double glazed.

Householder Planning Permission West Northamptonshire
9 Oct 2026 4 - Consultations Despatched (1-10) 2026/3551/HH

202 Billing Road Northampton NN1 5RX

Part demolition of existing garage and erection of single storey side extension

Householder Planning Permission West Northamptonshire
9 Oct 2026 3 - Case Officer Allocated (1-10) 2026/3592/LDP

13 Archery Road Middleton Cheney OX17 2QP

Lawful development certificate (proposed) for a loft conversion, roof extension, rear extension and roof windows

Lawful Development Certificate (Proposed) West Northamptonshire
9 Oct 2026 4 - Consultations Despatched (1-10) 2026/4039/HH

New Horizon 9 Pytchley Close Brixworth NN6 9EW

Removal of existing rear conservatory and porch and construction of single storey rear extension

Householder Planning Permission West Northamptonshire
9 Oct 2026 4 - Consultations Despatched (1-10) 2026/3949/HH

24 Smith Street Spratton NN6 8HW

Demolition of existing single storey utility room. New single storey side and rear extension.

Householder Planning Permission West Northamptonshire
8 Oct 2026 4 - Consultations Despatched (1-10) 2026/4057/PNHPD

24 Ashby Road Braunston NN11 7HE

Determination as to whether prior approval is required (under Schedule 2, Part 1, Class A of the above Order) for proposed single storey rear extensio...

Prior Notification Enlargement of dwelling house West Northamptonshire
8 Oct 2026 4 - Consultations Despatched (1-10) 2026/3005/HH

9 High Street Woodford Halse NN11 3RQ

Removal of corrugated asbestos roof and installation of tiled roof, creation of an eyebrow roof above 1 no. front elevation window, insertion of two r...

Householder Planning Permission West Northamptonshire
7 Oct 2026 4 - Consultations Despatched (1-10) 2026/3497/HH

The Hedgerows, 39 Holdenby Road, Spratton NN6 8JD

Single-storey rear extension, replacement and enlargement of rear facing pitched dormer with flat roof dormer, replacement of timber-framed pergola wi...

Householder Planning Permission West Northamptonshire
6 Oct 2026 4 - Consultations Despatched (1-10) 2026/3960/FULL

Linden Spinney 45 Leckhampstead Road Wicken MK19 6BY

Construction of 25 metre x 40 metre horse riding arena for private use

Full Planning Permission West Northamptonshire
6 Oct 2026 4 - Consultations Despatched (1-10) 2026/3465/HH

24 Park View Road Towcester NN12 6AL

Demolition of existing single storey rear extension and garage, with erection of ground floor front, rear and side extension and part first floor rear...

Householder Planning Permission West Northamptonshire
5 Oct 2026 10 - Invalid 2026/3774/FULL

Flats 2, 3 & 9 at 76/78 Overstone Road Northampton NN1 3JS

Replace existing windows with heritage-style replacement windows matching existing proportions, opening styles and glazing bar patterns.

Full Planning Permission West Northamptonshire
1 Oct 2026 4 - Consultations Despatched (1-10) 2026/3884/PNHPD

168 Towcester Road Northampton NN4 8LW

Determination as to whether prior approval is required (under Schedule 2, Part 1, Class A of the above Order) for proposed single storey rear extensio...

Prior Notification Enlargement of dwelling house West Northamptonshire
29 Sept 2026 4 - Consultations Despatched (1-10) 2026/0989/FULL

Lords Close Folly Lane Hartwell NN7 2HT

Remove existing flat roof porch. Front extension to include a porch and study/bedroom.

Full Planning Permission West Northamptonshire
29 Sept 2026 4 - Consultations Despatched (1-10) 2026/3820/HH

24 The Green Great Houghton Northampton NN4 7AL

Single storey rear extension

Householder Planning Permission West Northamptonshire
28 Sept 2026 4 - Consultations Despatched (1-10) 2026/3731/HH

82 Station Road Long Buckby NN6 7QA

Retention of timber climbing frame/play structure within rear garden. (Retrospective).

Householder Planning Permission West Northamptonshire
28 Sept 2026 4 - Consultations Despatched (1-10) 2026/3908/PNHPD

22 Porters Close Deanshanger MK19 6JW

Determination as to whether prior approval is required (under Schedule 2, Part 1, Class A of the above Order) for proposed demolition of the existing ...

Prior Notification Enlargement of dwelling house West Northamptonshire
28 Sept 2026 4 - Consultations Despatched (1-10) 2026/3792/HH

47 Deanshanger Road Old Stratford MK19 6AX

Two storey side and single storey rear extensions

Householder Planning Permission West Northamptonshire
25 Sept 2026 5 - Site Visit Complete (1-10) 2026/3859/FULL

Flat 4 91 Colwyn Road Northampton NN1 3PU

Construction of a single storey rear extension to the existing ground floor flat

Full Planning Permission West Northamptonshire
25 Sept 2026 4 - Consultations Despatched (1-10) 2026/3779/HH

22 Windmill Way Greens Norton NN12 8BZ

Removal of existing conservatory and construction of single and two-storey rear and side extensions with pitched and flat roofs.

Householder Planning Permission West Northamptonshire
25 Sept 2026 5 - Site Visit Complete (1-10) 2026/3453/FULL

Dodford Wharf Farm High Street Weedon NN7 4QD

Conversion of the existing agricultural barn to form a single dwelling, with porch and single garage extension to the existing dwelling.

Full Planning Permission West Northamptonshire
24 Sept 2026 4 - Consultations Despatched (1-10) 2026/3733/HH

Dovecote Passenham Road Passenham

Demolition of rear conservatory and construction of two storey rear extension with part first floor extension over existing parapet roof; timber cladd...

Householder Planning Permission West Northamptonshire
23 Sept 2026 4 - Consultations Despatched (1-10) 2026/3787/FULL

138 Wellingborough Road Northampton NN1 4DT

Proposed single storey part two-storey rear extension and relocation of the upper floor flats' staircase access to the rear

Full Planning Permission West Northamptonshire
23 Sept 2026 4 - Consultations Despatched (1-10) 2026/3778/HH

21 Thorburn Road Northampton NN3 3DA

Proposed two storey annexe to side and rear of dwelling

Householder Planning Permission West Northamptonshire
23 Sept 2026 4 - Consultations Despatched (1-10) 2026/3690/FULL

Abington Grove Childrens Home 58 Abington Grove Northampton NN1 4QU

Change of use from dwellinghouse (C3) to specialist childrens' alternative provision facility (sui generis). Demolition of garage and construction of ...

Full Planning Permission West Northamptonshire
22 Sept 2026 4 - Consultations Despatched (1-10) 2026/3485/HH

Wheelwrights Main Street Charlton OX17 3DP

Erection of a single-storey flat roof rear extension, alterations to the front entrance. Installation of a swimming pool & associated external work to...

Householder Planning Permission West Northamptonshire
22 Sept 2026 4 - Consultations Despatched (1-10) 2026/3794/HH

Pettifers Barn 2 Cross Lane Helmdon NN13 5QL

Single Storey Rear Extension

Householder Planning Permission West Northamptonshire
18 Sept 2026 4 - Consultations Despatched (1-10) 2026/3612/HH

Washbrook Barn Blacksmiths Lane Aston Le Walls NN11 6UN

Replacement of conservatory with single storey rear extension

Householder Planning Permission West Northamptonshire
18 Sept 2026 4 - Consultations Despatched (1-10) 2026/3689/HH

6 Ash Tree Road Northampton NN5 6GW

Single storey flat roof rear veranda with decking (retrospective)

Householder Planning Permission West Northamptonshire
17 Sept 2026 4 - Consultations Despatched (1-10) 2026/3741/HH

75 High Street Potterspury NN12 7PG

Solar panels on outbuilding and new enlarged drive area.

Householder Planning Permission West Northamptonshire
17 Sept 2026 4 - Consultations Despatched (1-10) 2026/3350/HH

Old Barley Mow Priors Marston Road Hellidon NN11 6GG

Construction of a detached garden building

Householder Planning Permission West Northamptonshire
15 Sept 2026 4 - Consultations Despatched (1-10) 2026/3664/HH

1 Chilwell Court Northampton NN3 9UR

Single Storey Side Extensions

Householder Planning Permission West Northamptonshire
14 Sept 2026 Approved 26 Oct 2026/3736/PNHPD

45 Tennyson Road Daventry NN11 9DQ

Determination as to whether prior approval is required (under Schedule 2, Part 1, Class A of the above Order) for proposed single storey rear extensio...

Prior Notification Enlargement of dwelling house West Northamptonshire
11 Sept 2026 4 - Consultations Despatched (1-10) 2026/3409/FULL

South Barn Ashby Lodge Northampton Road Welford NN6 6JE

Change of use from paddock to residential garden, new detached garage with home office over and new front porch to dwelling

Full Planning Permission West Northamptonshire
11 Sept 2026 4 - Consultations Despatched (1-10) 2026/3304/FULL

University Of Northampton Waterside Campus University Drive Northampton NN1 5PH

Erection of an ancillary storage unit to the rear of the Engine Shed

Full Planning Permission West Northamptonshire
11 Sept 2026 4 - Consultations Despatched (1-10) 2026/3303/LBC

University Of Northampton Waterside Campus University Drive Northampton NN1 5PH

Erection of an ancillary storage unit to the rear of the Engine Shed

Listed Building Consent (Alteration) West Northamptonshire
10 Sept 2026 3 - Case Officer Allocated (1-10) 2026/4131/LDP

1A Stirling Close Kings Sutton OX17 3FU

Application for a certificate of lawfulness for the proposed insertion of rear dormer to facilitate conversion of the loft to create habitable accommo...

Lawful Development Certificate (Proposed) West Northamptonshire
8 Sept 2026 4 - Consultations Despatched (1-10) 2026/4078/FULL

10 Collingwood Road Northampton NN1 4RD

Single storey rear & side extension & loft conversion with rear dormer to increase house in multiple occupantion from 4 occupants to 6 occupants.

Full Planning Permission West Northamptonshire
8 Sept 2026 4 - Consultations Despatched (1-10) 2026/4081/HH

Staddle Stones 14A Birds Hill Road Eastcote NN12 8NF

Proposed Extensions, Alterations and Remodelling to form enlarged living and garaging.

Householder Planning Permission West Northamptonshire
8 Sept 2026 4 - Consultations Despatched (1-10) 2026/4079/HH

6 Bourton Close Northampton NN4 9YT

Proposed two storey side extension, single storey rear extension together with loft and garage conversion

Householder Planning Permission West Northamptonshire
8 Sept 2026 4 - Consultations Despatched (1-10) 2026/3431/FULL

19 Leeson Road Towcester NN12 6EN

Log cabin in garden, part of which is to be used for Dog Grooming and the remaining for personal use

Full Planning Permission West Northamptonshire
8 Sept 2026 4 - Consultations Despatched (1-10) 2026/2778/FULL

5 Alexandra Terrace Northampton NN2 7SJ

Construction of first floor rear extension and conversion of existing garage to form 1 bedroom accommodation. Construction of enclosed staircase for a...

Full Planning Permission West Northamptonshire
7 Sept 2026 4 - Consultations Despatched (1-10) 2026/2679/HH

13 Greenfield Road Northampton NN3 2LJ

Demolish the existing single garage. Construct a new double garage

Householder Planning Permission West Northamptonshire
7 Sept 2026 4 - Consultations Despatched (1-10) 2026/4048/HH

29 Rawley Crescent Northampton NN5 6PU

Remove existing pebble dash exterior on the front elevation and replace with light coloured fibre cement cladding.

Householder Planning Permission West Northamptonshire
7 Sept 2026 4 - Consultations Despatched (1-10) 2026/3205/FULL

14 Botmead Road Northampton NN3 5JF

Change of use of land adjacent to number 14 Botmead Road to incorporate the land into the residential curtilage of number 14 Botmead Road; the land wi...

Full Planning Permission West Northamptonshire
Recency
Last 2 weeks
2-4 weeks
1-2 months
Older

Get free email alerts for new extensions applications in West Northamptonshire

Set up alerts

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 West 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 West Northamptonshire. You can also narrow the alert to a postcode, street, or drawn area.

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