Garage conversions in Kettering
Garage conversions in Kettering, signed off under building regulations and finished as a proper room.
A full single garage conversion in Kettering typically costs £14,000–£19,000, and a part conversion to a utility room or store starts from about £9,500, with the building control fee paid to the council. Building control in Kettering is North Northamptonshire Council building control: quoted by the council for each job (no published schedule).
- Typical cost
- £14,000–£19,000 full conversion
- Building control
- Council building control: free quote per job
- Planning advice
- North Northamptonshire Council: £187
- Time on site
- A few weeks
Our 2026 guide prices, all in. Your fixed price comes in writing after the site visit. Council fees checked October 2026.
What garage conversions in Kettering usually involve
If your garage is really just somewhere the clutter lives, converting it is the cheapest way to gain a proper room — an office, snug, utility, playroom or extra bedroom — without extending the footprint. We convert integral, attached and detached garages across Kettering and the Northamptonshire villages, bringing the floor, walls and roof up to habitable standard so the space is warm and dry all year. Most conversions here are permitted development, and we confirm that for your property before starting.
What a proper Kettering garage conversion involves
A genuine conversion is far more than boarding over the garage door — that is what meets Building Regulations and stops the room feeling cold and damp.
The floor is insulated, given a damp proof membrane tied into the house and raised to match the adjoining rooms, so there is no step down onto a cold slab.
The walls, including the old garage opening, are rebuilt or lined, insulated and plastered, with a window or door to suit the property. We match the new frontage to the existing brick so it never looks like a filled-in garage.
Roof, heating, electrics and ventilation are all brought up to standard. Many Kettering homes, particularly on the newer estates, have a single integral garage that converts neatly into a downstairs office or snug off the hall.
Permitted development or planning?
Most garage conversions are permitted development because the work is internal and the footprint does not change. The usual exceptions are listed buildings, conservation-area properties, and newer estate homes where permitted-development rights were removed by a planning condition. We check the planning history for your address first and tell you where you stand.
Kettering & villages we cover
We cover Kettering and the surrounding villages including Barton Seagrave, Burton Latimer, Broughton, Geddington, Rothwell and Desborough.
Ground, drainage and conservation in Kettering
Ground around Kettering ranges from ironstone to clay, and new-build plots are often compacted subsoil under a thin layer of topsoil. We check what is under each garden before choosing the base and the drainage.
Kettering has 26 conservation areas, including the town centre, Barton Seagrave, Burton Latimer, Geddington and Rothwell. Its Article 4 directions are site-specific, mostly older ones covering individual streets or buildings, so we check your address before designing anything that faces the road.
The River Ise runs along the east of the town, with river level stations at Barford Bridge and Slade Brook. You can check any address on the Environment Agency flood map.
Sources: North Northamptonshire Article 4 directions · Hanwood Park.
Permissions and fees in Kettering
- Planning routeMost garage conversions are internal and need no planning permission, unless a planning condition keeps the garage for parking or the house is listed. Building regulations approval is always needed. 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 (no published schedule). Building control fees
- 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
- Building regulations route chosen and the application handled
- Floor insulated and raised to match the house
- Door opening built up in matching brick or stone
- Heating, electrics and ventilation to current standards
The specification
- Building regulations application
- Damp proof membrane and insulated floor
- Foundation and wall in the old door opening
- Insulated walls and ceiling, plastered
- New window or door
- Completion certificate from building control
Rated 5.0 from 37 Google reviews
“Excellent Porch Extension by Lewis and the Team We recently had a porch extension completed by Lewis and his team, and we are extremely pleased with the result. From start to finish, Lewis was professional, reliable, and easy to communicate with. …”
Deepak · Porch extension — Google review
“These guys fitted our job in at short notice, did a great job despite the harsh weather. We had great communication throughout the project as it was not quite as simple as we first thought. We definitely recommend them and will be using them for future projects”
John — Google review
Everything else we do here
Garage conversions in Kettering: questions
Will I lose parking?
Is Building Control sign-off included?
How long does it take?
Can the new room be a bedroom?
How much does a garage conversion cost in Kettering?
Do I need planning permission for a garage conversion in Kettering?
Who handles building control in Kettering?
Garage conversions nearby
Request a site visit in Kettering
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.