Two-storey extensions in Kettering
We design, get approval for and build two-storey extensions in Kettering and the surrounding area. Choose the type of extension below or book a free site visit.
Kettering at a glance
- Postcode districts
- NN14, NN15 and NN16
- Area
- Northamptonshire, England
- Price region
- East Midlands
- Nearest towns
- Desborough (5 miles), Wellingborough (6.7 miles), Corby (6.9 miles), Rushden (9.2 miles)
- Distance to Northampton
- about 12.2 miles
- Approvals
- Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission.
Kettering sits about 12.2 miles from Northampton. Closer to home, Desborough is 5.0 miles away and Wellingborough 6.7 miles.
Extensions available in Kettering
Two-storey rear extensions
Design, approvals and build for Kettering homes. Guide from £55,000.
Learn more
Two-storey side extensions
From £84,500 in Kettering. Free visit to firm it up.
Learn more
Two-storey wraparound extensions
Design, approvals and build for Kettering homes. Guide from £118,000.
Learn more
Part single, part two-storey extensions
For homes in Kettering: typical guide from £70,500.
Learn more
Extensions over a garage
Design, approvals and build for Kettering homes. Guide from £31,000.
Learn more
First-floor extensions
From £24,500 in Kettering. Free visit to firm it up.
Learn more
Two-storey extensions for semi-detached houses
Guide from £55,000 in Kettering, including VAT.
Learn more
Two-storey extensions for detached houses
Guide from £84,500 in Kettering, including VAT.
Learn more
Kitchen extensions with bedrooms above
Guide from £55,000 (before kitchen units) in Kettering, including VAT.
Learn more
Extra bedroom and en-suite extensions
Guide from £55,000 (plus en-suite) in Kettering, including VAT.
Learn moreWhich type suits your house?
The boundaries usually decide it. Two-storey work close to a neighbour needs careful design for light and privacy, so at the visit in Kettering we measure distances to every boundary before suggesting a type.
Also available in Northamptonshire
- Two-storey front extensions
- Two-storey extensions for end-of-terrace houses
- Two-storey annexe extensions
- Garage conversions with a room above
- Two-storey extension plans and drawings
- Planning permission for two-storey extensions
- Structural engineering for two-storey extensions
- Building regulations for two-storey extensions
- Party wall notices for extensions
- Design and build two-storey extensions
Rules for Kettering
Kettering is in England. Two-storey rear: up to 3 m deep and 7 m from the rear boundary under permitted development. Side, wraparound and front: planning permission. Householder planning application: £548 (or £575 for applications made from 8 December 2026). Lawful development certificate: £274 (about £288 for applications from 8 December 2026). Councils should decide householder applications within 8 weeks of validation.
The full England rules explained
Questions about extensions in Kettering
Do you cover Kettering?
Yes. We cover Kettering (NN14, NN15 and NN16) and the surrounding area, including Desborough and Wellingborough. The first site visit is free.
What does a two-storey extension cost in Kettering?
Using our East Midlands guide, a two-storey rear extension with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) is about £55,000–£74,000 including VAT. An extension over a garage is about £31,000–£45,000.
Which other places near Kettering do you cover?
Everywhere around it, including Desborough (5 miles), Wellingborough (6.7 miles) and Corby (6.9 miles), and the rest of Northamptonshire.