House-to-flat conversions in Northampton

Covering Northampton

We work in Northampton (NN1) and the places around it, including Wellingborough, Towcester and Daventry.

Homes in the East Midlands

Across the East Midlands you find everything from city terraces to modern estates and stone villages, so the right extension depends a lot on the street and the materials around it.

What is a house-to-flat conversion?

A house-to-flat conversion divides a single house into two or more self-contained flats, each with its own front door, kitchen and bathroom. It always needs planning permission and full building regulations approval, particularly for fire separation and sound insulation between flats.

Fire separation and sound insulation between flats
Separate electrics, heating and metering
Bin, cycle and amenity space works

How much does a house-to-flat conversion cost in Northampton?

Use these ranges to budget for house-to-flat conversions; the survey turns them into a fixed price for the agreed specification.

Priced on survey.

What approvals does a house-to-flat conversion need in England?

Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.

Dividing a house into flats always needs planning permission in England. Councils assess flat sizes (many use the nationally described space standard), parking, bins, cycle storage and the effect on family housing supply.

What can change the price or programme?

Some councils restrict the loss of family houses or limit flat conversions in certain streets.
Sound insulation between flats is tested on completion.

What are the steps?

Send us the details. Give us a postcode, a rough idea of size and some photos, by phone, form or the guide price tool.
We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
Drawings, approvals, written quote. We prepare the design, apply for the approvals it needs, and give you a fixed price in writing.
We build it. Work follows an agreed programme, with inspections at each stage and a final sign-off.

House-to-flat conversions: common questions

What are the main building regulations issues?

Fire separation between flats, protected escape routes, sound insulation and separate services.

How long does a conversion take?

Typically 16 to 30 weeks on site after approvals.

Can you visit a house in Northampton to quote?

Yes. After a short call we arrange a site visit to measure up and agree what the design needs to do, then send a written price.

Also covering

Learn more about house-to-flat conversions, or see every project we cover in Northampton.