Planning permission for a garden office
Usually no application needed at all — if you respect the Class E limits. Height is the variable that causes the trouble.
Do you need planning permission for a garden office?
Usually no application needed at all — if you respect the Class E limits. Height is the variable that causes the trouble.
Class E: the garden building rights
Outbuildings "incidental to the enjoyment of the house" — offices, gyms, studios, stores — are the textbook Class E case. Limits apply to height (2.5 metres within 2 metres of a boundary), coverage (no more than half the garden), and siting (not forward of the house).
“This provides permitted development rights within the curtilage of a house for: (a) any building or enclosure, swimming or other pool required for a purpose incidental to the enjoyment”PD technical guidance, Class E · full text in the library → · official source →
Where it tightens
In conservation areas, buildings at the side of the house lose Class E rights, and anything visible above fence lines invites scrutiny of the area's setting. "Incidental" also matters: a garden office is fine; a self-contained annexe with sleeping accommodation is not incidental and needs permission.
The pattern in refusals is consistent: height and forward siting. A garden office that sits low and defers to the boundary passes almost by construction.
See it in a complete case study
In our Richmond example, 77 of 85 decided outbuilding applications within 1 km were approved — 91%, the most-approved project type we measured.
General guidance ends where your address begins
A Planning Policy report reads the designations on your exact property, applies the policies above and your council’s own Local Plan to your project, and shows what decided applications nearby reveal — every quote verified against its source.