Rapid Build Home Extension Kits to make life easier for you.
Garden Room Wilmslow
A garden room gives you a whole new space to work, relax and enjoy, without the upheaval of moving home. At Extension Kitz, we design and manufacture bespoke garden rooms that are made to measure in our factory and delivered ready for a fast, tidy build. For homeowners in Wilmslow, that means a warm, insulated room you can use throughout the year, whether you picture a garden office, a studio, a home gym or a peaceful retreat at the bottom of the garden. To talk through your ideas, get in touch with our friendly team whenever it suits you.

Why Wilmslow homeowners choose a garden room
Space is precious, and adding a dedicated room outdoors is one of the most practical ways to gain it. A structural insulated panel (SIP) garden room suits Wilmslow gardens of all shapes and sizes because the panels are made to measure and can be cut to almost any design.
The real difference is in how the room performs. SIPs combine an insulating foam core with two structural facing boards, creating walls that are strong, airtight and highly thermally efficient. That combination keeps your garden room comfortable in winter and cool in summer, so it becomes a true year-round space rather than a fair-weather one. High levels of insulation, good ventilation and plenty of natural light make it a genuinely usable extension of your home.
There is a lasting quality to the build too. SIP panels are up to seven times stronger than timber, and they will not rot or degrade over time. They stand up well to the weather, need very little maintenance, and comply with or exceed British building standards, including fire safety regulations. We are confident enough in this durability to back our garden room kits with a ten year guarantee.
Ways to use your garden room in Wilmslow
One of the joys of a garden room is how flexible it is. Because each kit is made to your requirements, you can shape the space around exactly how you want to live and work.
Garden office
A garden office gives you a dedicated, quiet place to work, away from the distractions of the main house. The short walk across the garden is a welcome change from a longer commute, and having a clear boundary between work and home life can do wonders for your balance.
Studio or hobby room
With plenty of glazing, a garden room makes a bright and inspiring art studio or hobby space. Being surrounded by the garden helps the ideas flow, and you have somewhere to be creative without spreading your project across the kitchen table.
Home gym or fitness studio
Many customers use their garden room as a private home gym, yoga studio or meditation space. There is room for the equipment and storage you need, plus the privacy and quiet that make training easier to stick with.
Guest accommodation and relaxation
A garden room also works beautifully as extra guest accommodation or a calm retreat for reading and unwinding. However you use it, a well-insulated SIP build keeps noise and temperature in check, so the space stays peaceful and comfortable.
How the process works
Much of the work happens before we arrive at your Wilmslow property. Each kit is manufactured to measure in our 40,000 sq ft factory in Greater Manchester, then fully assembled and quality checked under controlled conditions. As the components are taken apart for delivery, every piece is numbered so it can be reassembled quickly and accurately on site. This dry-built, factory-first approach is the same prefabricated method we use across our extension kits, and it keeps standards high while reducing disruption at your home.
Your kit contains the SIP panels along with clear assembly information, plus glazing and doors when requested. Delivery usually takes around 10 to 15 days after your order is placed and the deposit is paid. Because the panels are light yet strong, a garden room can be assembled faster than a traditional build and by a smaller team, saving both time and labour costs. Competent home builders often manage the work themselves thanks to the simplicity of the system, and our Build Assist service is on hand for professional advice if you need it. You can see finished results in our project case studies and browse styles in our photo gallery.
Why choose Extension Kitz
We are an established, family-run manufacturer and supplier of single storey extensions, garden rooms and annexes for both trade and domestic customers. You can learn more about how we work and what makes our approach different.
Here is what stands out for Wilmslow homeowners:
- Made to measure quality. Every panel is engineered to your design in our purpose-built factory, so the fit is precise.
- A complete design and supply service. We support your project from design through to build, with installation by your own builder, one of our preferred installers or with our Build Assist guidance.
- Proven, durable products. Our SIP builds are tried and tested, backed by a ten year guarantee, and installed to meet Building Regulations.
- Efficient and sustainable. Timber is sourced from responsibly managed forests, and factory production uses less energy and material than traditional methods.
- Technical support throughout. Our team is always ready to answer your questions, whether you are a homeowner or a builder.
Operating from our production, showroom and training facility in Greater Manchester, we deliver high-quality building products across the UK, including throughout Wilmslow and the wider Cheshire area. You can read more about our SIP system or visit the Extension Kitz homepage for a full overview of what we offer.
Planning and practical considerations
Many garden buildings can be installed without planning permission, but it always pays to check with your local planning office before you begin, as much depends on the size of the room and its position in the garden. We have many years of experience with applications and are happy to advise if you need support.
Your garden room in Wilmslow will need a solid base, typically concrete or screw piles, and in some cases the base of a previous shed, garage or garden building can be reused. Positioning matters too. Think about privacy for both you and your neighbours, easy access, and the view you will enjoy from the house.
You also have real control over performance and appearance. Choose from insulation widths of 97mm, 122mm, 147mm or 172mm depending on how you plan to use the space, and finish the exterior with brick slips, aluminium or composite cladding, or render, along with a choice of roof tiles. The final cost depends on the size of your garden room and the finishes you select.
Ready to create your garden room?
Ready to add space to your home? Contact our friendly team for a free quote today. Call 0330 166 0877, email sales@extensionkitz.co.uk or send us your project details online.
Frequently Asked Questions
Many garden rooms fall under permitted development, but this depends on the size and location of the building. It is best to check with your local planning office first, and we are happy to advise based on our experience with applications.
Yes. With high levels of insulation and airtight SIP construction, your garden room stays warm in winter and comfortable in summer, so it works as a true year-round space.
A concrete base or screw piles are the usual options, and in some cases an existing base from a shed or garage can be reused, provided it is suitable.
Delivery of your made to measure garden room kit usually takes around 10 to 15 days after your order is placed and the deposit is paid.
Not necessarily. The system is designed to be straightforward, so competent home builders often assemble it themselves. You can also use your own builder, one of our preferred installers, or call on our Build Assist service for professional advice.
Very little. SIP panels do not rot or degrade, they are up to seven times stronger than timber, and they are built to withstand the weather, which is why our garden rooms come with a ten year guarantee.
About Wilmslow
Wilmslow is a prosperous market town in the borough of Cheshire East, in the north west of England. Situated on the River Bollin, it lies around 12 miles south of Manchester and close to Manchester Airport, making it a popular commuter town. Known for its leafy residential streets, characterful period homes and modern family developments, Wilmslow attracts homeowners looking to make the most of their properties, with garden rooms offering a practical way to add flexible living space.
