House extensions in Weldon
Single and double storey extensions in Weldon, with the planning route and building control sorted first.
A single storey extension in Weldon typically costs £2,400–£3,200 per m² finished ready for decoration, roughly £29,000–£38,500 for a 12m² rear extension, with any kitchen fit-out priced separately. Building control in Weldon is North Northamptonshire Council building control: quoted by the council for each job.
- Typical cost
- £2,400–£3,200 per m²
- Building control
- Council building control: free quote per job
- Planning advice
- North Northamptonshire Council: £187
- Time on site
- Several weeks
Our 2026 guide prices, all in. Your fixed price comes in writing after the site visit. Council fees checked October 2026.
What house extensions in Weldon usually involve
We build single and double storey extensions, kitchen and dining extensions and side returns, from foundations to a finished shell ready for decoration, with the planning route, structural calculations and building regulations sorted before work starts.
Weldon is an old stone village on the east side of Corby, famous for Weldon stone, the limestone quarried here for centuries. Its historic centre of stone houses is surrounded by later estates that now join it to Corby.
We cover Weldon (NN17) and the villages around it, including Great Oakley, Little Oakley, Deene, Brigstock and Stanion.
Ground, drainage and conservation in Weldon
Weldon sits over the limestone and ironstone that were quarried here, and ground can change from natural rock to clay or fill within a garden. The Willow Brook runs past the village, so drainage needs designing rather than assuming.
Weldon has a conservation area covering the historic village, appraised in 2009. North Northamptonshire has no Article 4 direction in Weldon affecting driveways, porches or extensions.
The Willow Brook runs past Weldon, where the Environment Agency operates the Weldon flood storage reservoir. You can check any address on the Environment Agency flood map.
Sources: Weldon conservation area (Northamptonshire HER) · North Northamptonshire conservation areas.
Permissions and fees in Weldon
- Planning routeMany single storey rear extensions are permitted development; a householder application costs £548 and a lawful development certificate £274 (national fees from April 2026). Planning Portal guidance
- Pre-application adviceIf anything is unclear, North Northamptonshire Council gives householder pre-application advice for £187. Pre-application advice
- Building regulationsNorth Northamptonshire Council building control: quoted by the council for each job. Building control fees
- Sewers and neighboursIf a public sewer runs within 3m, you need a build-over agreement with Anglian Water. Anglian Water: building over or near sewers
- BuildOne fixed written price, then the build, inspections and the completion certificate.
Council fees and rules checked October 2026. Planning fees are the national fees from 1 April 2026.
What you get
- Planning or permitted development route confirmed before anything starts
- Structural calculations and building regulations drawings arranged
- Stone or brick matched to the house
- Build-over agreements with Anglian Water where a sewer runs close
The specification
- Drawings, calculations and approvals
- Foundations inspected by building control
- Blockwork, insulation and the outer skin in matching stone or brick
- Roof, windows and doors
- First and second fix, plastering
- Completion certificate from building control
“Really pleased with my new driveway. Beautifully finished, friendly professional workmen, would definitely recommend and will be using them again for the garden once other renovations complete.”
Driveway — Google review
“Absolutely great guys, job was done in good time and looks brilliant. No complaints, the driveway is immaculate. More work in the near future, thanks again!”
Driveway — Google review
Everything else we do here
House extensions in Weldon: questions
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Request a site visit in Weldon
We measure up, check levels and drainage, and send a written proposal with the build-up, the programme and one whole price. No pressure and no follow-up sales calls.