House Extensions in Surrey
SG Refurb designs and builds house extensions across Surrey — rear, side-return, wraparound, single- and double-storey — with one firm answerable from first survey to final handover. We add the space you need without the surprises, and the price before we start.
SG Refurb has been building and refurbishing homes since 2005, from our base at 27 High Street, Godstone. One firm runs it, and there's no guesswork on price. Get a free quote.
From a single bathroom all the way to a full house renovation, the approach is the same: professional, planned and priced before work starts. And as reactive contractors we handle the urgent, unplanned jobs too — whatever the size of the project.
Every type of extension, handled end to end
Whatever shape your project takes, we cover it:
Every job is run by SG — our own bricklayers, carpenters and plasterers on the building work, with trusted specialists brought in and managed by us for trades like electrics and plumbing. One firm coordinates every trade and stays answerable for the lot, so the responsibility never gets handed on to someone you have never met.
- Single storey extensions — kitchen-diners, rear and side-return builds that open up the back of the house
- Two storey extensions — extra bedrooms, bathrooms and living space without moving home
- Rear and wraparound extensions — joining the side return and rear to reclaim awkward, unused ground
- Kitchen extensions — knock-through and glazed builds that bring in light and connect the house to the garden
How your extension comes together
A clear process, start to finish:
Survey
we visit, measure up and talk through what you actually need.
A price for the job
a price once we have seen it. No vague "competitive rates", no moving numbers.
One firm on the build
your project run by SG's own team, with specialists brought in and managed by us, and one point of contact throughout.
Handover
finished, signed off and tidied up, with the certificates that matter.
Aftercare
if anything needs adjusting after handover, SG comes back and sorts it. You deal with one firm, not a trade you have to track down.
This is the part most builders leave fuzzy. We put the price up front so you know where you stand before a single brick is laid.
Accountable, start to finish
SG runs your extension from first survey to final handover — our own bricklayers, carpenters and plasterers on the building work, with trusted specialists brought in and managed by us for trades like electrics and plumbing. The people who quote your job are SG's own, so nobody hands the work, or the responsibility, on to a firm you have never dealt with.
A genuinely local Godstone builder working a fixed patch across Surrey, within about ten miles of our Godstone office, building homes since 2005. We do not sprawl into jobs we cannot stand behind.
Local work, locally proven
We build for homeowners across Godstone, Caterham, Whyteleafe, Warlingham, Oxted, Redhill, Reigate and the wider Surrey area.
Working a fixed local patch since 2005 means a lot of our work comes through recommendations from clients we have already built for. Ask and we will point you to recent extensions near you.
See also our Kitchens and Home refurbishments pages, or the Areas we cover.
IndicativeAwaiting photography
Indicative of the work, not a photograph of one of our jobs. It is replaced the moment we have the real one.
Common questions
Q.01How much does a house extension cost in Surrey?
Extension costs in Surrey vary with size, type (single or two storey), specification and groundworks. We do not quote a one-size figure — after a survey you get a fixed, quote so you know the full price before work starts, with no surprises.
Q.02Do you handle the whole extension yourselves or use subcontractors?
SG's own team handles the building work — brickwork, carpentry, plastering and groundworks — and we bring in trusted specialists for trades like electrics and plumbing, all managed by us. One accountable firm runs your project from survey to handover, so there is only ever one company to hold to the result.
Q.03What areas do you build extensions in?
We build house extensions across Surrey, within about ten miles of our Godstone office from our base in Godstone (RH9), covering Caterham, Whyteleafe, Warlingham, Oxted, Redhill, Reigate and the surrounding area.
Q.04How long have you been building extensions?
SG Refurb has been building and refurbishing homes since 2005, working from one base in Godstone. Your extension is handled by SG from first survey to final handover — our own team on the building work, specialists brought in and managed by us — so one firm stays answerable for the whole result.
Q.05Do I need planning permission for a house extension in Surrey?
Many single-storey extensions fall under Permitted Development and need no planning application, but larger, two-storey and wraparound builds — and homes in conservation areas or flats — often do. Building Regulations apply either way. We tell you exactly what your extension needs at the survey and handle the building control sign-off, so nothing lands as a surprise later.
Q.06Are there extension builders near me?
If you're in Godstone (RH9) or the surrounding Surrey, within about ten miles of our Godstone office area, yes — we're a genuinely local extension team based at 27 High Street, Godstone, not a firm travelling in. We build across Caterham, Whyteleafe, Warlingham, Oxted, Redhill, Reigate and the wider area.
Q.07Are you insured?
Yes. SG carry £5 million public liability cover and £5 million employers' liability cover, and we can provide the certificates before work starts if you would like to see them. It is a fair question to ask any builder and you should not have to chase the answer.
The folio continues
The next sheets — the same firm, the same paperwork, on every one.
Get a free quote
Thinking about extending? Tell us what you have in mind and we will arrange a survey.