Building projects we take on in Northamptonshire
House extensions
- Single-storey extensions in Northamptonshire
- Double-storey extensions in Northamptonshire
- Side extensions in Northamptonshire
- Side return extensions in Northamptonshire
- Wraparound extensions in Northamptonshire
- Kitchen extensions in Northamptonshire
- Orangeries in Northamptonshire
- Glazed and contemporary extensions in Northamptonshire
- Porches in Northamptonshire
Loft conversions
- Dormer loft conversions in Northamptonshire
- Hip-to-gable loft conversions in Northamptonshire
- Mansard loft conversions in Northamptonshire
- Rooflight loft conversions in Northamptonshire
- Bungalow loft conversions in Northamptonshire
Garage, basement and barn conversions
- Garage conversions in Northamptonshire
- Basement conversions in Northamptonshire
- Barn conversions in Northamptonshire
- Garden annexes in Northamptonshire
New build homes
Renovations and structural work
Design and approvals
Guide prices in Northamptonshire
| Project | Guide range (inc VAT) |
|---|---|
| Single-storey extensions | £1,850–£2,750 per m² of floor area |
| Double-storey extensions | £1,550–£2,400 per m² of floor area (both floors) |
| Dormer loft conversions | £45,500–£64,500 for a typical rear dormer with en-suite |
| Garage conversions | £17,000–£28,500 for a single integral garage |
| House renovations | £850–£1,700 per m² for a medium to full renovation |
| New build homes | £1,900–£3,050 per m² of floor area (build cost) |
Prices across the East Midlands are typically 5% below the UK average for this kind of work, which is reflected in the range for Northamptonshire.
Planning and building control in Northamptonshire
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
In England a rear dormer is often permitted development if the extra roof volume is no more than 40 cubic metres on a terraced house or 50 on other houses, it does not face the road, sits no higher than the ridge and is set back from the eaves, with matching materials and obscure-glazed side windows. Balconies, front dormers and work in conservation areas need planning permission.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
Building in Northamptonshire
In the East Midlands, many estates built since the 1960s have integral garages that convert well into a study or bedroom.
Questions about building in Northamptonshire
Do you cover all of Northamptonshire?
Yes. We take on projects across Northamptonshire, including Northampton, Corby, Kettering, Wellingborough and Rushden.
How much does an extension cost in Northamptonshire?
A single-storey extension in Northamptonshire typically costs £1,850–£2,750 per m² of floor area, including VAT.
Do I need planning permission in Northamptonshire?
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Who approves building work in Northamptonshire?
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.