How to build a perfect 10×20 gable shed

Building a 10×20 gable shed can be a rewarding project that not only adds functional space to your property but also enhances its aesthetic appeal. Whether you need a storage area, a workshop, or a recreational space, a gable shed of this size is spacious enough to meet various needs. Here’s a step-by-step guide on how to build a perfect 10×20 gable shed.

1. Planning and Preparation

Before you start, it’s crucial to plan. Check local building codes and obtain any necessary permits. Decide on the shed’s location, ensuring it’s on level ground and accessible. Draw up a detailed plan or purchase a shed plan that fits your requirements.

2. Gather Materials and Tools

You will need:

  • Timber for framing (2x4s, 2x6s)
  • Sheets of plywood for the walls, floor, and roof
  • Roofing material (shingles, roofing paper)
  • Siding material
  • Doors and windows (if required)
  • Nails, screws, hinges, and other hardware
  • Tools: hammer, saw, drill, measuring tape, level, etc.

3. Lay the Foundation

A solid foundation is key. Options include concrete slabs, concrete blocks, or pressure-treated timber. Ensure the foundation is level and square.

4. Construct the Floor Frame

Using your 2x6s, construct the floor frame. Cover it with plywood sheets. Ensure the frame is square and properly anchored to the foundation.

5. Build the Wall Frames

Construct the four wall frames using 2×4 timber. The front and back walls will have a higher top plate to accommodate the gable roof. Ensure the walls are plumb and brace them as you work.

6. Install the Walls

Lift the wall frames into place and secure them to each other and the floor frame. It’s easier with an extra pair of hands or temporary braces.

7. Assemble and Mount the Roof

The gable roof requires two identical triangular gable ends and a series of rafters. Once the gable ends and rafters are in place, cover them with plywood sheets. Then, add roofing paper and shingles for weather protection.

8. Add Doors and Windows

Install any doors and windows. Ensure they are well-fitted to prevent weather damage and enhance security.

9. Apply Siding and Trim

Cover the exterior walls with your chosen siding material. Add trim around the doors, windows, and roof for a finished look.

10. Final Touches

Paint or stain the shed to protect the wood and to match your home or landscape. Add any shelving, workbenches, or other interior fittings as needed.

Safety Tips:

  • Always wear appropriate safety gear.
  • Be cautious when working at heights.
  • Ensure all electrical tools are properly grounded.


Building a 10×20 gable shed is a substantial project that requires planning, effort, and attention to detail. However, with the right tools, materials, and a bit of patience, it’s an achievable task that can provide a great sense of accomplishment and a useful new space on your property. Remember to customize your shed to suit your specific needs and preferences.