South East
Exteriors
← All services

Exteriors

Extensions that sit quietly on the back of the house, and fronts that suit the street.

Our approach

An extension should look inevitable from the garden and invisible from the road. That means proportions that respect the original, brick that matches, and glazing that frames rather than dominates.

Side returns, full-width rear extensions, front gardens and driveways, repointing and render. We handle planning, party wall and Building Control, and design the interior at the same time as the shell so nothing gets decided twice.

Most recent: a side return that looks like it was always there, for a client in Herne Hill.

Exteriors
Exteriors
Exteriors
Exteriors

How a exterior project runs

01
Call, then survey
Twenty minutes on the phone about the house and the budget. If it's a fit, we come and measure, listen and price properly.
Week 0
02
Design
Plan, elevations and a materials board. We iterate until it feels right, then fix the price.
Weeks 1–4
03
Build
One crew, one foreman, weekly photo updates. Plumbing and electrics done in-house.
8–14 weeks on site
04
Aftercare
A snagging visit at six weeks, and we come back for anything on the list.
Ongoing

Budget guide · Exteriors

What exteriors cost with us

Shell to finish, including glazing, roof, electrics, heating, plastering and decoration. Kitchen units and appliances are separate.

See the full budget guide
Front garden, path & driveway
Tiled path, walls, planting, permeable drive
£8k – £20k
Side-return extension
Steel, rooflights, glazed doors, finished room
£70k – £110k
Full-width rear extension
Larger footprint, structural work, finished room
£95k – £160k

Exteriors calculator

Your exterior, roughly priced

A few questions specific to this kind of job. Colin fixes the number after a visit.

Extension type
Storeys
New floor area
25 m²
10 m²60 m²
Level of finish
Estimated range · Exteriors
£106,000 – £139,500
Shell to finish, including glazing, roof, services, plaster and decoration. Kitchen units separate.

Guide only. Excludes VAT, structural engineer's and planning fees, and anything we find behind the plaster. We'll give you a fixed price after a site visit.

Get this range in writing — book a call
Your figures come with you — we see them before the call.
“The neighbours thought the extension had always been there. That was exactly what we wanted.”
Sarah & Dev, East Dulwich · Rear extension
Thinking about extending?

A 20-minute call to start. Pick a time below, or send an enquiry instead.

Book a call

Further reading

Exteriors: the official guidance

Also from us