Tyne and Wear
Building Regulations for rear extensions in Tyne and Wear
Construction drawings, structural calculations and building control through to the completion certificate. Across Tyne and Wear we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Newcastle upon Tyne, Sunderland and South Shields.
Terraces and semis are typical around Tyne and Wear. On terraces a single-storey rear extension across the back yard is usually the practical choice; semis often have room for more.
What does it cost in Tyne and Wear?
As a guide, £2,500–£5,500 including VAT. These are guide ranges; the written quote after the survey is the figure that counts.
What approvals does it need in Tyne and Wear?
Every rear extension in England needs Building Regulations approval, whether or not planning is needed. You can use the council's building control service or a registered building control approver, by full plans (checked before work, usually within five weeks) or a building notice, and you get a completion certificate at the end.
New fabric must meet Approved Document L (2021 edition incorporating 2023 amendments): walls 0.18, roof 0.15 and floor 0.18 W/m²K, windows 1.4 W/m²K or Band B. Under the simple route, new windows, doors and rooflights should not exceed 25% of the extension floor area plus any openings removed; more glass is possible with a whole-house calculation.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent.
Where in Tyne and Wear do we work?
FAQ
Questions people ask
Full plans or building notice?
Full plans for most extensions: the design is checked before work starts. A building notice suits only simple jobs.
Who inspects the work?
The council's building control team or a registered building control approver (in Scotland, the council's building standards team).
What is a completion certificate?
The document confirming the work meets the regulations. Keep it; buyers' solicitors ask for it.
Do you cover all of Tyne and Wear?
We cover 18 towns and districts in Tyne and Wear, including Newcastle upon Tyne, Sunderland and South Shields.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.