Annfield Plain, County Durham
Kitchen-diner rear extension in Annfield Plain
An open-plan kitchen, dining and family room that opens straight onto the garden. If you live in Annfield Plain 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.
Annfield Plain sits in County Durham, with postcode districts including DH9. We usually keep the working kitchen where the old one was and put the dining table in the new space by the doors, which suits most Annfield Plain homes.
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 Annfield Plain?
Guide prices for a kitchen-diner rear extension in Annfield Plain 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 |
Your written price follows a measured survey and an agreed design, so it reflects your house, not an average.
Do you need planning permission for a kitchen-diner rear extension in Annfield Plain?
Planning for a kitchen-diner rear extension in Annfield Plain follows the English householder rules.
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. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Annfield Plain like to extend?
Terraces and semis are typical around Annfield Plain. 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 Annfield Plain comes together
Look round and measure
A free visit to see the back of the house, measure it, check the drains and boundaries and hear what you need.
Options and costs
We draw layout options and price each one, so the budget shapes the design rather than surprising you later.
Planning and regulations
We take the design through the right planning route, then produce the construction drawings and engineer's calculations for building control.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Kitchen-diner rear extensions near Annfield Plain
Neighbouring places we cover include Stanley (1.7 miles) and Consett (3.7 miles).
- Kitchen-diner rear extension in Stanley
- Kitchen-diner rear extension in Consett
- Kitchen-diner rear extension in Chester-le-Street
- Kitchen-diner rear extension in Whickham
- Kitchen-diner rear extension in Blaydon-on-Tyne
Other work in Annfield Plain:
FAQ
Kitchen-diner rear extension questions in Annfield Plain
What postcode areas do you cover around Annfield Plain?
Including DH9, and the surrounding County Durham area.
Will I need a structural engineer?
Yes for the beam over the new opening and usually the foundations; we arrange them and their calculations go to building control.
Can I have underfloor heating?
Yes. Wet underfloor heating in the new screed is the usual choice, often with the old room's radiators kept or replaced.
Do I need a party wall agreement?
In England, usually yes if the extension is on or near a shared boundary or the foundations are close to a neighbour's building. We serve the notices.
Do I need planning permission for a rear extension in Annfield Plain?
Often not for a single-storey rear extension of up to 3 metres (4 metres on a detached house) under permitted development, or up to 6 or 8 metres with prior approval, unless the house is in a conservation area or its rights have been removed.
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.