House extension builders in Leeds
We build single and two-storey, side-return and wraparound extensions in Leeds, with one team from the drawings to the last coat of paint.
We take on extensions, kitchens, bathrooms and rendering across Leeds and its suburbs, with the same team on site from start to finish.
What to know before you start
Planning in Leeds
Many single-storey rear extensions fall under permitted development. Anything bigger, or in a conservation area, needs planning permission from Leeds City Council. We prepare the drawings and handle the application.
Matching your house
Red-brick terraces, including back-to-backs, and 1930s semis in the suburbs. We match the stone, brick or render so the extension looks like it was always there.
Building regulations
Every extension needs building regulations approval, even without planning. We book the inspections at each stage and hand you the completion certificate.
Around Leeds
We also work across Morley, Pudsey, Horsforth, Wetherby and the rest of the area. Same team, same standards, wherever the job is.
Extensions in Leeds: common questions
Do I need planning permission for an extension in Leeds?
Often not. Many single-storey rear extensions fall under permitted development. If yours does need permission, the application goes to Leeds City Council, and we prepare and submit it for you.
How much does an extension in Leeds cost?
We can't give a fair price without seeing the job. Size, number of storeys, ground conditions, glazing and the kitchen or bathroom fit-out all change the price. We visit for free, measure up and send an itemised quote, so you can see exactly where the money goes.
More from K&M in Leeds
Extensions nearby
Planning an extension in Leeds?
We'll visit, measure up and give you a clear, itemised quote, free.


