Darlington, County Durham
Kitchen-diner rear extension in Darlington
An open-plan kitchen, dining and family room that opens straight onto the garden. If you live in Darlington and want to know what a kitchen-diner rear extension would cost and whether it needs planning, start with the online guide price or a free site visit.
Darlington is covered from our County Durham round, including DL1, DL2 and DL3. For Darlington kitchens we plan the extraction route and the island drainage before the slab is poured, so nothing has to be chased in later.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a kitchen-diner rear extension cost in Darlington?
Guide prices for a kitchen-diner rear extension in Darlington start from our North East England rate of £1,710–£2,790 per square metre, including VAT. North East prices are among the lowest in our range; former mining ground is the main foundation variable.
| Size | Guide price inc VAT |
|---|---|
| 3 m wide × 4 m deep (12 m²) | £20,500–£33,500 |
| 4 m wide × 5 m deep (20 m²) | £34,000–£56,000 |
| 4 m wide × 6 m deep (24 m²) | £41,000–£67,000 |
These are guide ranges; the written quote after the survey is the figure that counts.
Do you need planning permission for a kitchen-diner rear extension in Darlington?
The planning route for a kitchen-diner rear extension in Darlington is set by England's householder rules and your council.
English permitted development (Class A) allows a single-storey rear extension of 3 metres on a terraced or semi-detached house and 4 metres on a detached one, measured from the original house, with a maximum height of 4 metres and eaves of no more than 3 metres within 2 metres of a boundary.
If 3 or 4 metres is not enough, England's prior approval route allows 6 metres on a terraced or semi-detached house and 8 metres on a detached house for a single-storey rear extension. Neighbours are consulted, the council decides within 42 days, and the fee is £249, rising to £310 from 8 December 2026.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.
What are homes in Darlington like to extend?
Terraces and semis are typical around Darlington. On terraces a single-storey rear extension across the back yard is usually the practical choice; semis often have room for more.
How a kitchen-diner rear extension in Darlington comes together
Survey visit
We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Fixed price and build
A written price for the agreed design, a start date and a named contact through the build, ending with the building control completion certificate.
Kitchen-diner rear extensions near Darlington
Close by, we work in Newton Aycliffe, about 6.6 miles away, and Yarm, about 7.9 miles away.
- Kitchen-diner rear extension in Newton Aycliffe
- Kitchen-diner rear extension in Yarm
- Kitchen-diner rear extension in Ingleby Barwick
- Kitchen-diner rear extension in Stockton-on-Tees
- Kitchen-diner rear extension in Thornaby-on-Tees
Other work in Darlington:
FAQ
Kitchen-diner rear extension questions in Darlington
Can I live at home while the extension is built?
Usually yes. Most of the work is outside until the back wall is opened near the end, and that stage is screened off.
Do you handle building control in Darlington?
Yes. We apply to the council or a registered building control approver and hand over the completion certificate.
Where does the cooker extraction go?
Through the new wall or roof, ducted to outside. Recirculating hoods are possible but less effective.
Is the site visit in Darlington free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.
Can you match the brick or stone on my Darlington house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How long does a rear extension take to build in Darlington?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.