What We Build in Sunbury-on-Thames
Every garden room is designed around your space and your needs. All types are available in Sunbury-on-Thames — fully turnkey, with a free site visit included.
Building in Sunbury-on-Thames
Sunbury has good-sized suburban gardens — the Halliford area in particular has larger detached properties. Like Staines to the south, Sunbury sits under the Heathrow approach path, which means acoustic performance is a practical consideration for garden offices. Our SIPs construction addresses this without any additional cost.
Planning Authority
Spelthorne Borough Council
Covers the TW16 postcode area. Standard Surrey Permitted Development rules apply — most garden rooms don't need a planning application.
Showroom Visit
Our Lyne showroom is under 15 minutes from Sunbury-on-Thames — one of the closest locations to our workshop. You're welcome to drop in and see materials before booking a site visit.
Why Sunbury-on-Thames Homeowners Choose Us
Every Green Rooms build — in Sunbury-on-Thames or anywhere else across Surrey — uses the same premium specification and fully turnkey service.
10-Year Structural Guarantee
Every build carries a full 10-year structural guarantee from handover.
SIPs Construction
Structural Insulated Panels throughout — far superior to timber frame for insulation and strength.
20-Year Roof Guarantee
EPDM or metal panel roof on every build, never felt — 20-year guarantee as standard.
Fully Turnkey
Foundations, structure, cladding, glazing, electrics, flooring, plastering — all included.
Electrical Sign-Off
Mains-connected consumer unit, full testing, and a signed EIC certificate on every build.
Built in 2–3 Weeks
Our experienced team of carpenters complete most builds within 2–3 weeks from start to handover.
What Does a Garden Room Cost in Sunbury-on-Thames?
Prices for our garden rooms in Sunbury-on-Thames start from £12,750 for a garden pod and £15,450 for a garden office. Most of our builds land between £18,000 and £30,000 depending on size, cladding, glazing, and extras.
All prices include foundations, structure, cladding, doors and windows, full mains electrics, flooring, plastering, and site clean-up. There are no hidden extras. We give you a full written quote after your free site visit.
Garden Pod
Compact, fully turnkey
From £12,750 inc VAT
Garden Office
Year-round workspace
From £15,450 inc VAT
Garden Room
Multi-purpose space
From £16,950 inc VAT
Garden Room with Storage
Room + integrated storage
From £18,900 inc VAT
Bespoke / Custom
Any size, any spec
Price on enquiry
Common Questions About Garden Rooms in Sunbury-on-Thames
Do I need planning permission for a garden room in Sunbury-on-Thames?
Most garden rooms in Sunbury-on-Thames fall under Permitted Development rights and don't require a planning application — as long as the structure is single storey, no taller than 2.5m within 2m of the boundary, covers less than half the original garden, and is not forward of the principal elevation. Your local planning authority is Spelthorne Borough Council. We assess your exact position at the free site visit — for the large majority of our Sunbury-on-Thames builds, no planning application is needed.
Is Sunbury-on-Thames in Surrey for planning purposes?
Yes. Sunbury-on-Thames and the TW16 postcode are covered by Spelthorne Borough Council, which is part of Surrey. Standard Permitted Development rules apply. Spelthorne also covers Staines, Ashford and Shepperton. If you're asking because your TW postcode might suggest a London authority — Spelthorne is definitively Surrey, so Surrey planning rules govern your build.
Does Sunbury being under the Heathrow flightpath affect a garden room?
It affects how comfortable your garden room is — which is why our SIPs construction is a genuine advantage here. Structural insulated panels create a much more airtight and acoustically insulated envelope than a timber-frame shed. Several of our TW16 customers have noted the quiet. If you work from a garden office, the difference between a well-insulated build and a basic shed in terms of aircraft noise is significant.
Will a garden room add value to my home in Sunbury-on-Thames?
Yes. A well-built garden room in Sunbury-on-Thames typically adds between 5% and 15% to a property's value — and for premium builds in this market, the return can be greater still. Estate agents actively use garden offices and garden rooms as a headline selling feature. Beyond the financial return, a properly insulated, electrically certified structure transforms how you use your home all year round. See our reviews from customers across Surrey.
More questions? See our full FAQ →
We Also Build Nearby
Ready to Start Your Sunbury-on-Thames Garden Room?
Book a free, no-obligation site visit and our team will come to your Sunbury-on-Thames property, assess the space, and give you honest advice on what's possible — and what it will cost.