House extension types
Every extension we design and build, grouped by layout, room, style and the design and approval services behind them. Starting prices are national guides including VAT.
By layout
Where the new space goes: rear, side, both, or up.
Single-storey rear extensions
Extra ground-floor space across the back of the house: the most common extension in the UK.
From £21,000Learn more →Double-storey extensions
Two floors in one build: a bigger ground floor and extra bedrooms or a bathroom upstairs.
From £38,000Learn more →Side return extensions
Fill the narrow passage beside a terraced house and turn a galley kitchen into a wide, bright room.
From £18,000Learn more →Wraparound extensions
An L-shaped extension across the side return and the rear, for the biggest open-plan ground floor.
From £36,000Learn more →Side extensions
Use the space beside a detached or semi-detached house for a new room, single or two storeys.
From £22,000Learn more →Extensions over a garage
Build a bedroom, office or en-suite on top of an existing attached garage.
From £24,000Learn more →By room
What the new space is for.
Kitchen extensions
A larger kitchen or kitchen-diner opening onto the garden, designed around how you cook and eat.
From £27,000Learn more →Bedroom extensions
Add a bedroom and en-suite upstairs or on the ground floor, without moving house.
From £26,000Learn more →Utility and boot room extensions
A small extension for laundry, coats, boots and storage that frees up the kitchen.
From £14,000Learn more →Home office extensions
A quiet, purpose-built workspace attached to the house, with proper heating, data and daylight.
From £16,000Learn more →Annexe extensions
Attached living space for a relative: bedroom, shower room and kitchenette, connected to the main house.
From £55,000Learn more →Porch extensions
A new front porch for storage, security and a warmer hallway.
From £4,000Learn more →By style and build
How it looks and how it is built.
Orangery extensions
Brick piers, a solid roof edge and a glazed lantern: more light than an extension, more comfort than a conservatory.
From £30,000Learn more →Glass box extensions
Structural glazing with minimal frames, for a light-filled room that keeps the old house visible.
From £30,000Learn more →Flat roof extensions
Clean modern lines, generous ceiling height and room for lanterns and rooflights.
From £21,000Learn more →Pitched roof extensions
Lean-to and gable roofs in tiles or slate that blend with traditional houses.
From £22,000Learn more →Timber frame extensions
Faster, lighter construction with excellent insulation, finished in cladding, render or brick slips.
From £21,000Learn more →Bungalow extensions
Rear, side and wraparound extensions for bungalows, plus advice on going upwards.
From £26,000Learn more →Conservatory replacement extensions
Replace a cold or tired conservatory with a solid, insulated extension you can use all year.
From £20,000Learn more →Design and approvals
Drawings, planning and building regulations, handled for you.
Extension plans and drawings
Measured survey, design options, planning drawings and building regulations drawings.
From £1,200Learn more →Planning permission for extensions
We find the right route and handle the application: permitted development, prior approval or full planning.
From £350Learn more →Building regulations for extensions
Drawings, structural calculations and inspections so your extension is signed off properly.
From £900Learn more →