Kitchen extensions with bedrooms above in Stockton-on-Tees
Homes in Stockton-on-Tees with a bit of space to the side or rear can often take a kitchen extension with bedrooms above. We'll tell you honestly whether yours can, and what approvals it needs.
Before you start in Stockton-on-Tees, here's what applies.
- Postcode districts
- TS18, TS19 and TS21
- County / area
- County Durham, England
- Price region
- North East England
- Guide price
- £50,500–£68,000 (£1,800–£2,430 per m²), kitchen units and worktops priced separately
- Approval route
- It may be permitted development if it goes no more than 3 m beyond the original rear wall (counting any single-storey part) and stays 7 m from the rear boundary; otherwise it needs planning permission.
- Nearest towns
- Billingham (1.8 miles), Thornaby-on-Tees (2.5 miles), Middlesbrough (3.4 miles)
- Distance to Darlington
- about 9.8 miles
- First visit
- Free, no obligation
About a kitchen extension with bedrooms above
A kitchen extension with bedrooms above is a two-storey extension designed so the ground floor becomes a larger, usually open-plan kitchen and dining space, with one or two bedrooms or a bathroom on the first floor. It is a natural fit for a two-storey rear extension. The key design issues are the steel beams that open up the house, glazing and ventilation.
Stockton-on-Tees sits about 9.8 miles from Darlington. Closer to home, Billingham is 1.8 miles away and Thornaby-on-Tees 2.5 miles.
What it costs in Stockton-on-Tees
Using our North East England rates, a kitchen extension with bedrooms above with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) comes to about £50,500–£68,000 (kitchen units and worktops priced separately), including VAT. Bigger or more glazed designs cost more per m². These are guides, not quotes. Ground conditions, steelwork and access can move the figure either way.
| Spec | Per m² | A 4 m × 3.5 m footprint on two floors (28 m² of new floor space) |
|---|---|---|
| Essential | £1,660–£2,240 per m² | £46,500–£62,500 |
| Standard | £1,800–£2,430 per m² | £50,500–£68,000 |
| Premium | £2,160–£2,920 per m² | £60,500–£81,500 |
Planning and building regulations in Stockton-on-Tees
In England, a two-storey rear kitchen extension can be permitted development if it goes no more than 3 m beyond the rear wall of the original house and stays at least 7 m from the rear boundary, with matching materials and roof pitch, outside protected areas. No balconies are allowed. Deeper designs need planning permission, costing £548 (or £575 for applications made from 8 December 2026).
Approval in England: 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.
Building regulations: Building regulations approval (full plans recommended) from the council or a registered building control approver, with a completion certificate at the end.
Design points for Stockton-on-Tees homes
Services and drainage
Sinks, dishwashers and an upstairs bathroom all need waste routes to the drains, often near where the extension goes. We check the drains early and plan soil stacks, gas and electrical supplies so the kitchen layout is not limited later.
Bedrooms over a kitchen
Bedrooms above need an escape window or a protected route to the stairs, plus good sound insulation from the kitchen below. We position the stairs, landing and bedroom doors so the new rooms connect naturally to the existing first floor.
How we'd run your project
Understand the brief
At your home in Stockton-on-Tees we agree what you need: bedroom count, bathroom, kitchen space, and how much garden you want to keep.
Design and approvals
We draw the extension and check it against the rules for England, then apply for planning permission or a certificate of lawfulness, whichever fits.
Detail and price
Construction drawings, engineer's calculations and building control sign-off, then a written fixed price for the build.
Build and hand over
We manage the build from groundworks to decoration-ready finish and hand over with the completion paperwork.
Questions about kitchen extensions with bedrooms above in Stockton-on-Tees
How long does a kitchen extension with bedrooms above take?
Allow 4 to 8 weeks for survey and design, then the approval period (councils should decide householder applications within 8 weeks of validation), then 4 to 8 weeks of technical design, which can overlap. The build itself usually takes 14 to 20 weeks, longer for large or complex designs.
Do I need planning permission for a kitchen extension with bedrooms above in Stockton-on-Tees?
Stockton-on-Tees is in England, so England planning rules apply. It may be permitted development if it goes no more than 3 m beyond the original rear wall (counting any single-storey part) and stays 7 m from the rear boundary; otherwise it needs planning permission. If in doubt, a lawful development certificate or a planning application gives you certainty before you build.
How much does a kitchen extension with bedrooms above cost in Stockton-on-Tees?
Our guide for North East England, which covers Stockton-on-Tees, is £1,800–£2,430 per m² including VAT. A typical project with a 4 m × 3.5 m footprint on two floors (28 m² of new floor space) comes to about £50,500–£68,000 (kitchen units and worktops priced separately). Design and approval fees are extra, and we fix the build price in writing once the design is agreed.
Can I keep using my kitchen during the build?
For part of it. The new structure can be built while your existing kitchen stays in use, but when the rear wall is opened and the new kitchen is fitted there will be several weeks without one. We plan when this happens and help you set up a temporary kitchen elsewhere in the house.
Is it cheaper to build a kitchen extension and bedrooms at the same time?
Yes, in most cases. Building both floors at once means one set of foundations, one roof, one scaffold and one set of approvals. Adding a first floor later means removing the original roof, possibly strengthening the foundations and disrupting the kitchen again. If you think you will need the bedroom, build it now.
Nearby
We also cover places near Stockton-on-Tees, including:
Other extensions in Stockton-on-Tees
All two-storey extension services in Stockton-on-Tees · Kitchen extensions with bedrooms above across County Durham
The quickest next step is a visit. We'll look at your house in Stockton-on-Tees and give you an honest view of the options.