A garden room warm enough to use in January.

We build it. You use it. From £10,910 fully installed in Oxfordshire — 150mm SIP insulation throughout, fixed price, 10 working days.

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150mm SIP Walls, roof and floor
10 working days Start to finish
From £10,910 Fully installed, all-in
10-year warranty Structure, roof, doors, cladding
The gap in the market

Most garden rooms are cold. Or expensive. Or both.

Flat-pack buildings from Dunster House and similar cost less upfront — because you build them yourself, over several weekends, using fibreboard insulation that struggles in winter.

Premium bespoke builders charge £25,000–£60,000. Their quoted prices often exclude foundations, groundwork and VAT. The real number arrives after you've signed.

Ridgeway sits between the two. Fully installed, 150mm SIP construction, transparent fixed pricing. The market average for an installed garden room is £21,000–£27,000. Ours start at £10,910.

How it works
Ridgeway Garden Room — mixed cedar and steel spec, Oxfordshire
Two sizes

Choose your build.

Two sizes, four cladding options. Every build is fully installed with a fixed price covering everything.

Compact Home Office 3.6x2.4m — cedar cladding

Compact Home Office

3.6 × 2.4m · 8.64 sqm · 7 working days

The right size for a dedicated home office — space for a desk, storage and room to move. Fits close to boundaries under permitted development.

From £10,910 inc VAT, all-in
See full spec →
Garden Studio 4.8x3.6m — steel cladding

Garden Studio

4.8 × 3.6m · 17.28 sqm · 9 working days

Twice the floor space. Suits a studio, creative workspace or larger home office setup. Bigger than a standard single garage.

From £15,528 inc VAT, all-in
See full spec →

Cladding options

Steel — from £10,910 Mixed — from £11,570 Composite — from £12,012 Cedar — from £12,700
The process

From first call to handover in 10 working days.

1

Tell us about your garden

One call or email. We ask what you need and check your space works.

2

Site visit and fixed quote

We come to you. What we quote is what you pay.

3

Sign off and order

Deposit paid, materials ordered, build date confirmed.

4

We build it

7–9 working days on site. Ground screws — no concrete, no mess.

5

Handover

Keys, warranty documents, ready to use the day we leave.

Full build process →
Why Ridgeway

Built to last. Priced to be bought.

Genuinely warm in winter

150mm EPS SIP panels across every wall, roof and floor. U-value 0.27 W/m²K — approaching building regulations standard. Warm enough to work in without a heater in January.

Everything included

Ground screws, ClassicBond EPDM roof (20-year lifespan), French doors, delivery and labour. One price covers all of it — no extras to budget for after we've quoted.

No planning permission needed

Both sizes fall within permitted development. No applications, no council fees, no waiting. We advise on a Lawful Development Certificate (£103) if you want written confirmation.

Fixed price contract — no variation surprises mid-build
10-year warranty — structure, roof, doors and cladding
Adds value to your property — typically £5,000–£15,000
Ground screws — reversible, works on slopes, no concrete
Transparent pricing

No hidden extras.

Most garden room companies don't publish prices. When they do, the figure usually excludes foundations, groundwork and VAT. Every price below includes everything.

Product Cladding Foundation Price inc VAT
Compact (3.6×2.4m)SteelGround screws£10,910
Compact (3.6×2.4m)MixedGround screws£11,570
Compact (3.6×2.4m)CedarGround screws£12,700
Studio (4.8×3.6m)SteelGround screws£15,528
Studio (4.8×3.6m)CedarGround screws£18,065
Market average for installed garden rooms: £21,000–£27,000. We're 40–50% below that — with better insulation than most.
Full pricing breakdown
Common questions

Before you get in touch.

Do I need planning permission?

No. Both sizes fall within permitted development. We recommend a Lawful Development Certificate (£103) for written peace of mind — we advise on that if you want it.

How disruptive is the installation?

Ground screws, not concrete — no excavation, no mess. 7–9 working days on site. Your garden is back to normal the day we leave.

Will it be warm enough in winter?

Yes. 150mm SIP throughout gives a U-value of 0.27 W/m²K — approaching building regulations standard. It holds heat the same way a well-insulated room in your house does.

What's covered by the warranty?

10 years on structure, roof, doors, windows and cladding. 2 years on workmanship. Everything is covered by a written contract before we start.

See all questions →

Tell us about your garden.

We cover Oxfordshire. One call or email gets you a ballpark figure — no commitment, no sales pressure.

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