How to Build a Corner Summer House

A corner summer house nestled in your garden can be the perfect retreat. Building your own can be a rewarding endeavour. In this guide, we’ll take you through the steps to bring that idea to life. Ready to transform your outdoor space into a haven of relaxation and creativity?


BillyOh Picton Corner Summerhouse
BillyOh Picton Corner Summerhouse

Before you dive into building your summer house, meticulous planning is crucial. Careful consideration of several key factors is essential, including:

Choosing the perfect location

Assess the available space. Consider factors such as sunlight, privacy, and proximity to existing structures. The location should complement your garden’s layout and provide a tranquil setting.

Size, style, and materials

Determine the size of your garden summer house based on its intended use and available space. Consider architectural styles that harmonise with your garden’s ambience.

Additionally, think about the materials you want to use. Wood is a popular choice for its natural charm. However, there are various options based on your preferences and budget. For inspiration, have a look at our metal summer houses.

Remember, effective planning ensures your corner summer retreat meets your vision. Moreover, it’ll guide you through the process and help you avoid common pitfalls.

Gathering Materials and Tools

To build one, you’ll need the following essential materials and tools:


Green Mineral Shed Felt – Premium Shed Roofing Felt
Green Mineral Shed Felt – Premium Shed Roofing Felt
  • Timber: For framing, walls, and roof.
  • Plywood: For the sheathing and flooring.
  • Insulation: To maintain a comfortable temperature.
  • Roofing materials: Such as shingle roof tiles or mineral roofing felt.
  • Windows and doors: To provide light and access.
  • Roof felt nails, screws and fasteners: For assembly.


  • Measuring tape and square: For precise measurements.
  • Circular saw: To cut timber and plywood.
  • Hammer and screwdrivers: For fastening.
  • Drill with bits: For making holes and driving screws.
  • Level: Ensures your structure is straight.
  • Safety gear: Including gloves, safety glasses, and hearing protection.

Sourcing tips

You can find these materials and tools at local hardware stores or online retailers. Consider sourcing reclaimed or repurposed materials for an eco-friendly option. Or explore DIY kits for added convenience.

Building the Foundation

As with shed bases, the foundation is a critical starting point for your corner summer house. Here’s how to prepare it:

1. Site preparation

Clear the chosen area of vegetation and debris. Ensure the ground is level and firm.

2. Foundation options

BillyOh Eze Base
BillyOh Eze Base

You have two primary foundation choices:

  • Concrete pads: Pouring concrete pads provide a solid, permanent foundation. Excavate the area, create wooden forms, add a layer of gravel for drainage, and pour concrete.
  • Wooden posts: This option is more versatile and budget-friendly. Dig holes for wooden posts, set them in concrete, and ensure they are level. Attach a beam to the tops of the posts to support the summer house.

Select the foundation type based on your needs, budget, and local building codes.

Constructing the Frame

  1. Measuring: Start by measuring and marking the dimensions on the ground or foundation. Ensure accuracy to prevent misalignment.
  2. Cutting: Using a circular saw, cut the timber pieces according to your measurements. Make precise 90-degree cuts for corners and joints.
  3. Assembling: Begin by creating the base frame. Secure the timber pieces together using screws or nails. Ensure it’s square and level. Add vertical studs for wall support, evenly spaced according to your design.
  4. Roof frame: Construct the roof frame, typically in a triangular or truss pattern. Attach it securely to the top of the walls, ensuring proper alignment.

By following these steps, you’ll have a solid frame ready for the next stages of your construction.

Adding Walls and Roof


Position your prefabricated wall panels onto the frame, ensuring they are level. Secure them by nailing or screwing through the wall studs into the frame. Use braces to maintain stability as you work around the structure.


Green Mineral Shed Felt – Premium Shed Roofing Felt
Green Mineral Shed Felt – Premium Shed Roofing Felt

Hoist the roof structure onto the top of your corner summerhouse, aligning it with the frame. Secure it in place using appropriate fasteners. Ensure the roof is level and well-supported.

Insulation and weatherproofing options

  • Insulation: Depending on your climate, insulate the walls and roof. Go for materials like fibreglass batts or foam board insulation. Such choices will help regulate temperature and improve energy efficiency.
  • Weatherproofing: Apply a weather-resistant barrier like tar paper to the exterior walls. Do this step before adding siding. Use quality roofing materials and seal all gaps and seams to prevent leaks.

Installing Doors and Windows

  1. Placement: Determine the ideal locations for doors and windows. Ensure they align with your design and provide ample natural light and ventilation.
  2. Cut openings: Measure and mark the openings for doors and windows on the wall panels. Use a saw to cut out these sections carefully.
  3. Install frames: Insert window and door frames into the openings. Secure them with screws or nails.
  4. Hang doors and windows: Hang doors on their hinges and insert windows into their frames. Ensure they open and close smoothly.
  5. Weatherproof: Apply weatherstripping and sealant to prevent drafts and leaks.

Interior Finishing and Decoration

BillyOh Renna Tongue and Groove Corner Summerhouse
BillyOh Renna Tongue and Groove Corner Summerhouse
  • Flooring: Opt for durable, easy-to-clean flooring like laminate or vinyl. Outdoor rugs add cosiness.
  • Garden shed paint: Light, neutral colours can make the space airy and spacious. Accent walls or colourful furniture can inject personality.
  • Furnishing: Choose space-saving, multipurpose furniture. Foldable tables and chairs are ideal. Add comfy seating, cushions, and small tables for a cosy atmosphere.
  • Storage: Maximise vertical space with shelves or wall-mounted storage.
  • Lighting: Install ambient and task lighting for functionality and ambience.

Personalise your space to suit your purpose. Whether it’s a reading nook, art studio, or relaxation haven, the possibilities are endless!


Congratulations on your corner summer house project! With careful planning and a thoughtful interior, it’ll become a haven of comfort. Now, it’s time to enjoy the fruits of your labour and bask in the tranquillity of your own corner of paradise!

Explore Garden Buildings Direct for more summer houses UK inspiration. Take a cue from our contemporary summer houses and insulated summer houses.

Here’s next on your reading list: Guide to Garden Corner Summerhouses