Building services in Northampton
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Northampton
| 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) |
| Hip-to-gable loft conversions | £52,000–£74,000 for a hip-to-gable with rear dormer |
| Garage conversions | £17,000–£28,500 for a single integral garage |
| House renovations | £850–£1,700 per m² for a medium to full renovation |
| Orangeries | £2,300–£3,250 per m² of floor area |
We start from a UK-wide guide and adjust it for the East Midlands, where labour and materials are typically about 5% below average.
Planning permission in Northampton
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.
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.
About building in Northampton
In the East Midlands, many estates built since the 1960s have integral garages that convert well into a study or bedroom.
Projects in Northampton (NN1) are surveyed in person before we quote, so the price reflects your actual property. Northampton has a population of around 250,000.
How it works
- 01
Survey and brief
We visit, discuss your ideas and budget, and survey the property or site at no cost.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Permissions sorted
Applications, building control and neighbour arrangements, all before the start date.
- 04
Build and sign-off
We run the build to a written programme and hand over the completion certificate.
Questions from homeowners in Northampton
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.
Do you work in Northampton?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Northampton, including postcodes NN1.
How much does an extension cost in Northampton?
A single-storey extension in Northampton typically costs £1,850–£2,750 per m² of floor area, and a double-storey extension £1,550–£2,400 per m² of floor area (both floors), including VAT.
Do I need planning permission for an extension in Northampton?
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.
How much does a loft conversion cost in Northampton?
A rear dormer loft conversion in Northampton typically costs £45,500–£64,500 for a typical rear dormer with en-suite, including VAT.