There were no new planning rules for garden buildings this month, but two council demolition orders and a fresh fine warning are a sharp reminder of what can go wrong. If you are planning a garden room, these stories are worth reading before you build.
Council orders demolition of a Green Belt garden building near Farnham Royal
Buckinghamshire Council has issued an enforcement notice against a large warehouse-style building and storage container at a property near Farnham Royal, ruling them inappropriate development that harms the openness of the Green Belt. The notice takes effect on 1 July 2026, after which the owner has three months to comply unless they appeal. The lesson for buyers is that scale and an industrial look invite enforcement, whatever the intended use. Read the case.
Separate access and fencing turned an outbuilding into an unauthorised dwelling
In a second Buckinghamshire case, a homeowner was ordered to demolish a garden outbuilding after the council decided it was not subordinate to the main house, because it had its own access and a separately fenced garden. The council called it inappropriate Green Belt development. It shows how a separate entrance and a fenced-off plot can make a council treat a garden building as a second home rather than a permitted outbuilding. Read the details.
Trade press warns of fines up to £20,000 for getting the rules wrong
A recent trade article set out that non-compliant garden buildings can trigger enforcement notices and fines reaching £20,000 in serious cases, and restated the permitted-development limits: single storey, no higher than 2.5m within 2m of a boundary, not forward of the main elevation, and covering no more than half the original garden. Building regulations also apply above 15 square metres near a boundary, and fully above 30 square metres. Getting the size, height and boundary distance right is not just paperwork: it carries real financial and removal risk. Read the guidance.
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