Costs · House extension costs
House extension costs
Extension costs are driven by size, structure, glazing and the kitchen or living space that goes inside. We price from your drawings, or help you get them prepared.
What affects the price.
Size and storeys
Single-storey, double-storey, side-return or wrap-around.
Foundations
Ground conditions, trees and drains can change the foundation design.
Steelwork
Opening up the back of the house usually needs structural steel.
Glazing
Sliding doors, rooflights and slim-frame glass vary widely.
Kitchen and finishes
Kitchen supply, flooring and heating choices.
Party walls
Work on a shared boundary needs the party wall process.
Usually in the quotation.
- ✓ Groundworks and foundations
- ✓ Structure and roof
- ✓ Steelwork
- ✓ Services
- ✓ Plastering and flooring as agreed
What we'll ask you.
- — How big do you want the extension?
- — Will it include a new kitchen?
- — Do you have planning permission?
Request an estimate.
Tell us about your project and we'll arrange a visit and a written quotation.