Garden shed plans

Before you start

This is the original metric version of the plan (millimetres/centimetres). See also Garden shed plans : Imperial (feet/inches).

Build your own garden shed.

This DIY shed plan is a typical backyard design. It is designed as a garden shed but would also be suitable for other uses, e.g. a workshop.

The shed is a generous size, with over three square meters of internal floor space and enough head room for people of above-average height to stand up straight in.

Make sure you have a flat site for your shed. You can place it in the corner of a section but you need to be able to walk around it during construction.


You should have access to a range of typical DIY tools for this project, including a hammer, angle grinder, skill saw, hand saw, concrete trowel, cordless drill, and tape measure.

Here is your shopping list (suggested lengths of timber allow 5% wastage and off cuts):

  • 52m of dressed 50mm by 50mm framing timber*
  • 3.5m of rough sawn 50mm by 25mm timber
  • 33m of rough sawn 25mm by 75mm timber
  • 11.5m of rough sawn 100mm by 25mm timber (for door)
  • Approximately 7.5m of untreated 50mm boxing timber
  • Enough ready-mix concrete to make 0.25m3 (refer to bag for volumes)
  • Two 1800mm sheets of corrugated iron with an effective coverage of at least 730mm
  • One 1800mm sheet of corrugated PVC with effective coverage of at least 730mm
  • One 2200mm length of metal flashing to cap the roof
  • Two large door hinges and a door latch
  • One window, recommended size 500mm by 500mm (see The door and window)
  • Cladding materials (see cladding options)
  • 50mm flat head nails, 75mm jolt head nails, and roofing nails

*Dressing removes the surface of the timber so dressed timber dimensions are usually 5mm smaller than the advertised dimensions. For example, dressed 50mm by 50mm timber is actually 45mm by 45mm. Our garden shed plan takes this discrepancy into account and minor adjustments will be needed if the framing timber you use doesn''t measure 45mm by 45mm.