Work a garden building installer can help with
Shed assembly
Describe what is there now, what you want changed and any photos, so quotes cover the same scope.
Shed bases
Mention the size, access and any deadlines so tradespeople can price the job accurately.
Summerhouses
Say what finish or standard you expect and whether materials are included.
Garden offices
Add anything that could affect the work, such as parking, pets or working hours.