CFM Studio
Introducing CFM Studio
CFM Studios are our spacious, fully finished garden studios designed to sit under 30sqm and fall within permitted development rights. Built from high-performance 150mm SIPs, with aluminium glazing, cedar and steel cladding, and a fully self-contained WC, they offer the feel of a small extension — without the complexity of one. Thoughtfully designed, beautifully crafted, and ready to enjoy all year round.
All that is included plus available sizes and prices below.
What’s Included:
Design & Consultation – Bespoke advice tailored to your garden and lifestyle
Foundations – Installed using high-performance RADIX ground screws
Precision Assembly – Built with highly energy-efficient PUR SIP panels:
• 150mm thickness for the roof, floor and wallsC24-grade treated structural timber used throughout for strength, durability, and long-term stability (PEFC certified)
Windows & Doors
• Aluminium double glazed toughened glass Bi-folding doors and Tall opening window (secured locks)
External Cladding
• Front elevation and one elevation with the window: Western Red Cedar – sustainably sourced, naturally weather-resistant, and low maintenance
• Remaining two sides: Steel cladding – strong, modern and requires no upkeep for 25+ yearsTyvek Housewrap
A breathable membrane fitted behind the cladding to protect SIPs from moisture.Roofing
1.5mm EPDM rubber roof for durability and excellent weatherproofing, with black guttering included.Site Clearance
Once the build is complete, we’ll clean and clear the area – leaving your new office and shed combo ready to enjoy.
Planning your garden room is easier than you think. See our How Does It Work? page for a full breakdown of each step.
Fully Finished Interior
Electrical Installation
• Installation of interior wall lights (client-supplied)
• Six double power sockets in total – two with integrated USB charging ports
• Three exterior wall lights
• Wi-Fi–controlled switch for external lightsFlooring
• Premium thick laminate flooring
• High-quality underlay
• Finished with matching skirting boardsPlastering & Decorating
• Smooth plaster finish on walls and ceiling
• Painted in a crisp, neutral colour throughoutHeating
• Smart electric heater with Wi-Fi control and built-in thermostat
• Slim, freestanding design — not wall-mounted for flexible positioningWC Area
• Premium cassette-style toilet, requiring no external plumbing
• High-quality compact sink unit with integrated hot-water system
• Fully self-contained, easy to maintain, and installed ready for immediate use
• Finished with all necessary fixtures, electrics and detailing
Prices are subject to change and extra charges might incure if there is limited side access or it’s further than our usual reach area.
Sizes & Prices
The CFM Studio is available in two carefully designed sizes, both under 30sqm internally to remain fully compliant with permitted development rules.
• Studio 625 (6.25m x 4.20m) — From £47,950
• Studio 750 (7.50m x 4.20m) — From £53,950
Both models include a full turnkey finish, premium aluminium glazing, cedar and steel cladding, enhanced electrics, plastered interiors, luxury flooring and a fully self-contained WC.
Optional Integrated Shed
A concealed and secure shed can be incorporated into either size.
From £1,450.
About CFM
We’re Cotswold Furniture Makers — a small, family run business building high spec, all season garden rooms using SIPs (Structural Insulated Panels) for exceptional insulation and longevity.
Every project is finished with premium materials such as Western Red Cedar cladding, aluminium glazing, herringbone flooring and screwless sockets — the details that make it feel like a room in your house, not a shed at the end of the garden.
We live locally, build locally, and run the business from our own garden room showroom — built six years ago and used every day.
If you like the idea of a warm, fully finished space that feels like a room in your house (not a shed), we think you’ll find this guide helpful.
No pressure. No annoying sales calls.
Just the information you actually need — before anyone gives you the hard sell.
