Three ways to do it properly.
A Karl Gardner extension is never the cheapest way to add a room. It is the best one. Every build is priced honestly, finished completely, and made to outlast the mortgage.
The Anthracite
Crisp white render, three anthracite-framed sliding panels, and one porcelain floor running from kitchen to patio.
- Floor-to-roof sliding glass
- Seamless inside-out porcelain
- Whole-house render & windows
From £85,000complete, no surprises
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The Bronze
Charcoal brick laid on steel, bronze-anodised frames, and warm sand porcelain flowing out to meet the lawn.
- Bronze-anodised glazing
- Charcoal brick on steel
- Whole-house render & windows
From £115,000complete, no surprises
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The Corner
Two walls of frameless structural glass meeting at an open corner, no post, nothing between the kitchen and the sea.
- Frameless structural glass
- Open corner, no post
- Cantilevered flat roof
Price on applicationone built per year
DiscoverHow a Karl Gardner build happens.
The Walk-Round
Karl comes to your house and walks it with you. An hour of straight talk about what your home could be — no salesman, no pressure. It is always Karl.
The Film
Before a brick is laid, you watch your own house transform — your walls, your garden, your view, rebuilt on film. You approve what you have already seen finished.
The Build
One commission at a time. Dates honoured, Karl on site every day, the job wrapped tight and tidy. Your neighbours will watch it happen.
The Handover
Scaffolding down, floors polished, glass gleaming, keys back in your hand. Moved-in ready, to the day.
By appointment · Twelve commissions a year ·
Book a consultationEvery price is the finished price — design, structure, glazing, floors, decoration. Everything left moved-in ready.