Garden room prices look wildly different across companies — and it's not always obvious why. Some of the gap is genuine quality. Some is brand premium. Some is what's included versus what's extra.
This page compares The Green Rooms against the best-known names in the UK bespoke garden room market on a like-for-like basis: same 5×3m building, at listed price, broken down by what you're actually getting. Prices are based on research conducted in 2025–2026 and are subject to change — we'd always recommend getting a current quote from any company you're comparing.
Price Comparison at 5×3m
Standard specification — comparable glazing, insulation and foundation included. Entry-level listed price.
The Green Rooms
That's us
SIPs throughout · EPDM/metal roof · Ground screws · Plastered interior · Full electrics
£25,460
Crown Pavilions
Entry level 5×3m — rises significantly with upgrades (to £43,000+)
From £26,000
Similar entry price; lower for pods
Green Retreats
Factory product lines — fixed spec at this price point
From £36,450
+£11,000 vs The Green Rooms
Crane Garden Buildings
Premium crafted timber buildings — different market positioning
From £53,355
+£27,895 vs The Green Rooms
Prices researched 2025–2026. Verify current prices with each company before making a decision.
Specification Comparison
What's included as standard across different company types — at the same price point.
| Feature | The Green Rooms | National Brands (factory) | Timber Frame Suppliers |
|---|---|---|---|
| Construction type | SIPs throughout | Varies by brand | Timber frame + insulation |
| Floor insulation | Integral SIPs | SIPs or foam board | Fitted separately (gaps possible) |
| Wall insulation | Integral SIPs core | SIPs or Rockwool | Rockwool in stud — thermal bridges at every stud |
| Roof insulation | 5"+ SIPs — 20yr guarantee | Varies — check specs | Often minimal — felt common |
| Roof covering | EPDM rubber or metal panel | EPDM or metal panel | Felt standard — cracks within years |
| Foundations | Ground screws (standard) | Ground screws or concrete | Often DIY / not included |
| Interior finish | Plastered, ready to decorate | Plasterboard or OSB | OSB or plasterboard (often DIY) |
| Electrical installation | Part P certified, full spec | Included as standard | Often extra / not included |
| Cladding options | 6 options — cedar to composite | Fixed product ranges | Limited options |
| Bespoke sizing | Any dimension | Fixed product sizes | Fixed sizes |
| Local site visit | Free — James visits personally | Sales rep or virtual | Varies |
| Build time on site | 5–10 days typical | 3–7 days (factory built) | 2–4 weeks |
Why Bespoke Matters
The national factory brands — Green Retreats, Crown Pavilions, and others — sell from a product catalogue. You choose a model, choose a size from their available dimensions, and they build you that product. It's a reliable, well-tested approach that works well for straightforward plots.
The limitation is when your garden doesn't fit a standard footprint, when you have a specific use case that doesn't map to a product range, or when you want a design that isn't on their list. At that point, you're paying for customisation on top of a catalogue product — which adds quickly.
We build bespoke from the start. Your 4.2×3.8m is the same complexity as a 4×4 to us — we're not fitting your garden around our dimensions. And because we don't have a catalogue to protect, we'll build you the golf simulator at 4m internal height, the L-shaped office or the music studio with acoustic isolation — as a standard project, not a special.
Any dimension
We build to your exact measurements — not the nearest standard size from a product catalogue.
Any use case
Golf simulator, music studio, cinema room, garden bar — we've built them all. Nothing is treated as a special project.
Any cladding combination
Mix and match materials, colours and finishes. Cedar canopy, charred spruce walls, millboard decking — your design.
L-shapes and complex footprints
Our completed L-shaped garden office is a standard example of what we do. Not an exceptional case.
Why a Local Surrey Specialist?
James visits your garden
We do our own site visits — not a sales rep reading off a form. The same person who quotes the job is the person who designs it and manages the build.
No sales pipeline pressure
We're not running a lead conversion funnel. You talk to James, he gives you an honest price and an honest opinion on what will and won't work.
We know Surrey gardens
Chalk soil in Epsom. Clay in Guildford. Sloped plots in the North Downs. We know the ground conditions, the planning authorities and the local planning history across every town we work in.
Accountable after the build
We're a small team based in Surrey — you can reach us after completion. We're not a national company where your post-build point of contact changes quarterly.
When a National Brand Might Suit You Better
We're not the right choice for everyone, and we'd rather tell you that clearly than waste your time.
Questions to Ask Any Garden Room Company
"Is the insulation integral to the panels or fitted separately?"
Why it matters: Separate insulation means gaps and thermal bridges. Integral SIPs means none.
"What's the roof covering — EPDM, metal, or felt?"
Why it matters: Felt is the most common failure point in cheap builds. It cracks within years.
"What are the foundations?"
Why it matters: Ground screws = clean, permanent, adjustable. "Placed on paving" = not permanent.
"What's the interior finish?"
Why it matters: Plastered = a proper room. OSB = a hut. They're not the same product.
"Is the electrical installation Part P certified?"
Why it matters: Required by law. Ask for the certificate. Some companies skip this.
"What's the roof guarantee?"
Why it matters: EPDM and metal carry 20+ year guarantees. Felt doesn't.
"Is the size truly bespoke or a fixed product?"
Why it matters: Important if your garden doesn't fit their standard dimensions.
"Who does the site visit — a salesperson or the builder?"
Why it matters: A salesperson's survey is not the same as a builder's site assessment.
Ready to Get a Price?
Our 5×3m garden room starts at £25,460 fully finished — ground screws, SIPs, plastered interior, full electrics. Use the calculator for an instant guide price or book a free site visit.