Homeowners planning to add a shed, greenhouse, or garage to their garden should be aware of the legal rules that determine when planning permission is required. In many cases, small structures can be built without formal approval, but there are specific limits on size, height, and placement.
Under permitted development rights, a shed or greenhouse must not exceed 2.5 metres in height if within two metres of a boundary. The total area of the building should not cover more than half the garden, and it cannot be used as living accommodation. Similar rules apply to garages, though they must also not be forward of the principal elevation of the house.
If the property is in a designated area such as a national park, Area of Outstanding Natural Beauty, or conservation area, stricter limits may apply. In these locations, any structure over 10 square metres may require planning permission. Homeowners are advised to check with their local planning authority before starting work.
Insurance is another important consideration. Some garden features must be declared to your insurer, as they may affect buildings or contents cover. Failure to notify could invalidate a policy if the structure is damaged or causes injury.
For those unsure about the rules, the UK government's Planning Portal provides detailed guidance. It is always better to confirm requirements in advance to avoid costly mistakes or enforcement action.
