Summerhouse Base Kit – Level and Support Your Shed
Swift Leveller is a UK-based manufacturer specialising in adjustable base kits designed to create strong, stable foundations for garden buildings without the need for concrete or digging. Our innovative products are built for ease of use, durability and long-term reliability, making them ideal for DIY projects on uneven or sloped ground. We offer a versatile range including shed base kits, summerhouse base kits and adjustable supports in various sizes to suit everything from small garden stores to large outdoor rooms. With options like the Flexi, Mini, Max and XL, there’s a solution to suit every size and type of structure.
Screw the head u channel of the Swift levelling device to the frame at equal intervals. Complete this for the whole frame.
Flip the timber frame over so that the bases point to the floor. Slide the templates to the ground and pin them in position.
Move the frame leaving the templates in place, and drill the large centre holes in the ground.
Insert the base plates into the ground. Position the heads and frame over the large centre holes and drop into place.
Adjust each head to the required height and tighten each nut to secure the frame. Use a spirit level to check, and adjust if necessary.
Summerhouse Bases
Creating a stable, long-lasting base for your summer house doesn’t need to involve messy concrete or heavy paving slabs. Our Summerhouse Base Kit is a smart, adjustable solution designed to support larger garden buildings with wider footprints and heavier frames. It’s ideal for wooden summer houses, garden rooms or home offices that need a level foundation across uneven or sloped ground. With weather-resistant materials and fully adjustable height control, this kit offers a cleaner, faster and more flexible alternative to traditional bases—giving you a secure structure without the disruption of digging or permanent groundwork. If you’re looking for inspiration or practical advice, there are plenty of summerhouse guides and ideas to help you plan your perfect garden retreat.
Everything you need to build a strong and stable summer house base is included in one easy-to-use kit. Each pack comes with fully adjustable levellers, heavy-duty fixings and clear installation instructions to guide you through the setup with confidence. Summerhouse base kits are available in pack sizes of 4, 6, 8, 10 or 12 to suit a variety of summer house dimensions and weight requirements. For more specific setups or added support, optional accessories and custom add-ons are also available—giving you the flexibility to tailor your base to your exact garden layout.
Choosing the right base summerhouse base kit depends on the size, weight and intended use of your summer house. Whether you’re building a cosy garden retreat or a fully insulated home office, there’s a solution designed to suit your structure:
• Use the Flexi kit for standard-sized summer houses with moderate weight and timber bases.
• Choose the Max kit for larger garden buildings or those with additional internal features like furniture or storage.
• Opt for the XL kit when installing insulated summer houses, home offices or heavier outdoor rooms that require maximum support.
• Always consider the number of support points needed for even weight distribution—larger builds typically benefit from 10 or 12 levellers.
• If in doubt, our team is happy to help you select the best kit for your specific setup and ground conditions.
Base for a Summerhouse
A stable base is the foundation of a long-lasting summer house. Without proper support, your building is at risk of sinking, warping or becoming uneven over time—especially on soft or sloped ground. A level base also plays a key role in maintaining the integrity of insulation and flooring, helping to keep your space warm, dry and secure year-round. Swift Leveller kits are engineered to deliver this kind of dependable support with ease. Made from durable, weather-resistant materials and fully adjustable to suit your ground conditions, our products offer a cleaner, faster alternative to concrete that protects your summer house from moisture, movement and long-term structural issues.
If you have any questions about our base for a summerhouse kit or need help choosing the right option for your summer house, we’re here to help. Whether it’s advice on sizing, installation or placing an order, our team is always happy to assist. Get in touch today and we’ll guide you every step of the way.