What we doExtensionsLoft conversionsRenovationsNew buildsKitchens and bathrooms
Cobham showroomThe showroomDesign it in 3DHow it works
Book a showroom visit

We design and build extensions, renovations and new homes.

One team from the first drawing to the day we hand back your keys. Come and see it all at our showroom on Cobham High Street.

Inside the Cobham Design and Build showroomNow open on Cobham High Street
Free design consultationAt the showroom or at your home
Planning handledDrawings, applications, building regs
Fixed price in writingAgreed before any work starts
Our own build teamThe people who drew it build it
Design, then build

We draw it. Then we build it.

Your extension starts as a sketch at our showroom table. The same team takes it through planning and builds it.

An architect's sketch of a rear extension
The designThe build
01Design

Survey, drawings and 3D visuals, worked up with you at the showroom.

02Planning

Permitted development, planning, building regs and party wall, handled for you.

03Build

Our own team builds it, to a fixed price agreed in writing.

Inside the showroom

See what's inside before it goes in.

Tap to take each one apart and see why we fit it.

01 · Floors

Tiles that stay flat.

A porcelain tiled floor sectionA porcelain tiled floor section, taken apart into its layers
Porcelain tile1 / 5
Porcelain, not ceramic.

Fired harder and denser, so it barely absorbs water and stands up to a frost.

Flexible adhesive2 / 5
Bonds that can flex.

A flexible adhesive moves with the floor as it heats and cools, so tiles stay stuck.

Uncoupling membrane3 / 5
Cracks stop here.

A membrane separates tile from screed, so movement below never reaches the surface.

Levelled screed4 / 5
A dead flat base.

A levelled screed lets big format tiles sit flat, with no lipping between them.

Underfloor heating5 / 5
Warm underfoot.

Pipes in the screed heat the room evenly and free up wall space.

02 · Doors

A front door built in layers.

A sage green composite front doorA sage green composite front door, taken apart into its layers
Composite skin1 / 5
Looks like timber. Won't warp.

A tough outer skin that won't rot, fade or need painting.

Weather seals2 / 5
Sealed all the way round.

Seals on every edge keep out draughts and driving rain.

Multipoint lock3 / 5
Locks at more than one point.

Hooks and bolts lock the door into the frame down its height.

Insulated core4 / 5
Warm through the middle.

A dense insulating core keeps heat in and gives a solid, quiet close.

Reinforced frame5 / 5
Strong where it counts.

A reinforced inner frame holds lock and hinges firm. Ask us about PAS 24 rated doors.

03 · Windows

Glazing that keeps the heat in.

An anthracite aluminium windowAn anthracite aluminium window, taken apart into its layers
Toughened outer pane1 / 5
Safety glass outside.

Toughened glass is far stronger than standard glass and breaks into small, blunt pieces.

Warm edge spacer2 / 5
No cold edges.

Warm edge spacers between the panes cut condensation round the glass.

Argon filled3 / 5
Gas, not air.

Argon between the panes insulates better than air, so less heat escapes.

Low-E coating4 / 5
Heat bounces back in.

An invisible coating on the inner pane reflects room heat back inside.

Thermally broken frame5 / 5
Slim frame, no cold bridge.

A break inside the aluminium frame stops the cold travelling through.

Design it in 3D

Extend it, or build new.

Add an extension to a family home, or shape a new build from 2,500 to 10,000 sq ft. Turn it, switch it to dusk, then send it to us and we'll have it ready for your visit.

Loading the 3D designer
The showroom

See it and touch it before you choose.

Tiles, doors, windows and kitchens on display, with the design table in the middle.

Tiles and stone
Tiles and stoneLarge format porcelain, marble and slate
Doors and windows
Doors and windowsHeritage colours and slim aluminium
Kitchens
KitchensDesigned with the rest of the build
From a Surrey Building client
"Fantastic from start to finish. Great communication, helpful advice, and a brilliant finished product."
Luke Ashford
The Cobham Design and Build showroom on the high streetFind us on Cobham High Street
Book a showroom visit

Come and see it.

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Your details

Free and no obligation. Your details only go to the Cobham Design & Build team.

See you soon.

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ShowroomCobham High Street
VisitsBy appointment
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