Adding space to your property should feel exciting, not stressful. At Extension Kitz, we design, manufacture and supply quality single storey extensions, garden rooms and annexes for homeowners and the trade right across Wilmslow and the wider Cheshire area. Our Structural Insulated Panel (SIP) kits offer a smarter route to your dream home extension, giving you a faster build, warmer rooms and far less disruption than traditional brick and mortar. If you are ready to expand your living space, Contact our friendly team for a free quote today.

A Modern Way to Extend Your Wilmslow Home

Wilmslow is home to many attractive, well kept properties, and homeowners here understandably want any new space to feel like a natural part of the existing house. We make that achievable. Every extension we build is tailored to your exact requirements, whether you want to extend to the rear, add a side return, or create a stand-alone structure in the garden.

We fabricate everything in our 40,000 sq ft factory before delivering it to your Wilmslow property ready for installation. Our team can complete the build, or you can use one of our preferred installers. Because the panels are made under controlled factory conditions, you avoid the weather delays and prolonged mess that so often come with conventional building work.

From a bright new kitchen to a quiet home office or a comfortable family room, our SIPs extension kits give you a practical and cost-effective way to add usable square footage to your home.

Why Choose SIPs for a Home Extension in Wilmslow?

Structural Insulated Panels are a proven, modern construction method. Each panel uses an insulating foam core sandwiched between two structural facings, typically oriented strand board (OSB). The result is an insulated extension system that is strong, energy efficient and durable. Our panels are typically 1220mm wide and up to 3 metres long, connected with a unique jointing system for both walls and roofs, and made using timber from sustainable sources.

Speed and Reduced Disruption

The traditional building process can leave a property feeling like a building site for months. Our approach is different. Because the panels are prefabricated to your design off site, assembly on your Wilmslow property takes a fraction of the time. Once the foundations are ready, the structure can be up and watertight in just a few days, with predictable costs and far less daily disruption for your household.

Outstanding Thermal Performance

Energy efficiency matters to every modern home. Our SIP walls and roof achieve a U-value of 0.15 as standard, creating an airtight, exceptionally warm space. Your new room stays cosy through the winter and comfortable in summer, supporting lower heating bills and a more sustainable, energy efficient extension.

Exceptional Structural Strength

A fast build does not mean compromising on quality. Once assembled, our SIP structures are three times stronger than an average brick build and seven times stronger than timber framed buildings. They offer excellent fire resistance, comfortably exceeding British fire safety regulations, and because the core is foam, they are not susceptible to pests. The walls are also slimmer than traditional build, which gives you more usable space inside.

Bespoke Design Options to Suit Your Property

No two homes in Wilmslow are the same, and your extension should reflect your taste and lifestyle. We work closely with you on bespoke extension design that integrates seamlessly with your existing architecture. You can choose from a range of finishes, including traditional brick slips, contemporary cladding or smooth render.

Our system suits a wide variety of projects, such as:

Open plan kitchen extensions and dining spaces
Spacious family or living rooms
Home offices, studies and playrooms
Annexes for extended family
Conservatory conversions that replace a cold, tired room with a warm, usable one

You can browse completed work in our gallery or explore detailed case studies to gather inspiration for your own transformation.

The Extension Kitz Process

We have refined our process so it feels clear and reassuring at every stage.

1. Design and Quote

First, we discuss your needs and design preferences. We then provide a clear, upfront quote. Because the materials are fabricated off site, the cost of the SIPs is known early, reducing the risk of budget surprises mid project.

2. Factory Fabrication

Our skilled team cuts and prepares your panels to exact measurements on our factory floor. We even assemble each kit as a trial run to confirm a precise fit before it leaves us.

3. Delivery and Installation

After this quality check, components are numbered and coded for fast, accurate reassembly, then safely transported to your Wilmslow property. Our team or one of our preferred local installers completes the build on your prepared foundation, leaving you with a premium, beautifully finished space.

Expertise You Can Trust

Extension Kitz is both a manufacturer and a supplier, which keeps quality firmly in our hands and removes unnecessary middle man costs. Our skilled, experienced staff fabricate every SIP system in our purpose-built factory, and our projects are managed from design through to build and installation where required. Our technical support team is always on hand should installers have any queries, and our research and development work keeps improving what we offer. To learn more about our facility and approach, visit our about us page.

Begin Your Wilmslow Extension Today

You deserve a home that works perfectly for the way you live. If you are ready to add space with a high performance, fast build solution, we are here to help. Whether you are weighing up planning permission, comparing a rear extension with a side extension, or simply curious about extension cost, our friendly team will guide you with honest, practical advice.

Contact our friendly team for a free quote today.

Extension Kitz
Cemetery Works, Cemetery Road, Radcliffe, Greater Manchester, M26 4FT
Phone: 0330 166 0877
Email: sales@extensionkitz.co.uk

Frequently Asked Questions

Many single storey extensions fall under permitted development rights, so you may not need formal planning permission. This depends on the size of the extension and your property type, and rules can differ in conservation areas. We always recommend checking with your local planning authority within Cheshire East, and our experienced team is happy to guide you through the early stages.

Much of the work happens off site in our factory, so on-site time is greatly reduced. Once your foundations are ready, the structure can be up and watertight in just a few days. Many homeowners then arrange utilities and interior finishing over the following weeks.

The cost depends on the size, design and finishes you choose. Because the SIPs are fabricated to set dimensions, pricing is highly predictable. Share your basic measurements with us and we can provide an indicative cost quickly, helping you plan your budget with confidence.

Often, yes. SIPs are lightweight compared to brick and block, so they can sometimes rest on an existing solid concrete base, provided it is approved as suitable. This makes a conservatory conversion a popular choice for turning a cold, underused room into a warm space you can enjoy all year.

Absolutely. The SIP system is highly flexible, and our finishes include brick slips, cladding and render to complement your property. We tailor each design to your dimensions, layout and style.

About Wilmslow

Wilmslow is a market town and civil parish in Cheshire East, in Cheshire, England, lying around 11 miles south of Manchester. It is a popular residential area known for its attractive homes, good local amenities and strong commuter links to Manchester and the surrounding Cheshire countryside. With property values in the area remaining desirable, adding well designed, usable space to a home in Wilmslow can be a valuable and practical investment.