If you’re looking to create a relaxing space for family gatherings or the perfect hobby room, the Mercia 13 x 9 Premium Corner Summerhouse with Side Shed is an excellent choice. Its clever corner-fitting design helps you maximise the usable space in your garden while also providing bright, panoramic views through full-length glazed windows and glazed double doors. The integrated side shed offers secure and practical storage for garden tools, outdoor equipment and everyday essentials.
Manufactured here in the UK using sustainably sourced and regulated timber, this summerhouse is constructed with 12mm weatherboard cladding for a strong, smooth and durable finish. The interlocking tongue and groove roof and floor create a sturdy structure capable of handling daily use, while the shatterproof styrene glazing ensures safety in busy gardens with pets or young children.
Heavy-duty mineral felt is supplied to provide long-lasting weather protection, and robust fixtures and fittings are included, along with a lock and key for added security. With a 10-year anti-rot guarantee included (when treated annually with a high-quality preservative and waterproof top coat), you can be confident your building will stand the test of time.

Key Features

• Clever Corner Design Maximising Garden Space
• Integrated Side Shed for Practical Storage
• Full-Length Glazed Windows for Panoramic Views
• Glazed Double Doors for Easy Access
• 12mm Weatherboard Cladding
• Tongue and Groove Roof and Floor Construction
• Heavy-Duty Mineral Felt Roof Covering
• Dip-Treated Timber Finish
• Shatterproof Styrene Glazing
• 10-Year Anti-Rot Guarantee

Dimensions

Width: 4057mm
Internal Width: 2750mm
Depth: 2913mm
Internal Depth: 2750mm
Base Width: 3949mm
Base Depth: 2800mm
Roof Thickness: 12mm
Floor Thickness: 12mm
Eave Height: 2000mm
Internal Eave Height: 1947mm
Ridge Height: 2146mm
Internal Ridge Height: 2066mm
Door Aperture Height: 1712mm
Secondary Door Aperture Height: 1625mm
Door Aperture Width: 1181mm
Secondary Door Aperture Width: 963mm

Base Requirements

This building must be installed on a firm and level base, such as concrete, paving slabs or a properly constructed timber platform. A level foundation ensures the structure sits correctly, the doors operate smoothly and the building remains stable over time.

SIDE SHED INSTRUCTIONS PDF
SUMMERHOUSE INTRUCTIONS PDF

Delivery Information

Delivery is 7–14 days. Once your order is ready, you will be contacted to arrange a convenient delivery date. Delivery is kerbside only, meaning the building will be offloaded at the nearest accessible point to your property.

What to Expect From A Mercia Delivery

Mercia Installation Service