Perth and Kinross
Building Regulations for rear extensions in Perth and Kinross
Construction drawings, structural calculations and building control through to the completion certificate. Across Perth and Kinross we handle the whole rear extension: survey, drawings, the planning route, building control and the build. Towns we cover here include Perth, Blairgowrie and Rattray and Crieff.

Post-war semis and terraces are common around Perth and Kinross, and many have room for a single-storey rear extension within Class 1A limits.
What does it cost in Perth and Kinross?
As a guide, £2,500–£5,500 including VAT. We put a fixed price in writing once the design is agreed, and explain any provisional sums such as foundations.
What approvals does it need in Perth and Kinross?
Scottish extensions are approved by building warrant, granted by the council's building standards team before work begins, with a completion certificate submitted when the work is finished.
Insulation and glazing follow Section 6 of the Scottish Technical Handbook; the building warrant drawings show how the extension meets it.
Classes 1A and 1B do not apply in conservation areas, and listed buildings need listed building consent.
Where in Perth and Kinross do we work?
FAQ
Questions people ask
What is a completion certificate?
The document confirming the work meets the regulations. Keep it; buyers' solicitors ask for it.
Do I need regs if I don't need planning?
Yes.
What stages are inspected?
Typically foundations, damp proofing, drainage, steelwork, insulation and completion.
Do you cover all of Perth and Kinross?
We cover 5 towns and districts in Perth and Kinross, including Perth, Blairgowrie and Rattray and Crieff.
Who builds the extension?
Vetted building teams working under contract to us; your contract is with S&K Property Investments and Improvement Ltd.