Greenwich has significant conservation area coverage at 16%, and several streets are covered by design guidance that affects garden room applications. Householder approvals in Greenwich run at around 79% with an average decision time of 10 weeks.
A garden room in Greenwich can often be permitted development when it stays within size and design limits and no local constraint applies to your address. Always confirm at address level.
Outbuildings including garden rooms are permitted development under GPDO Schedule 2, Part 1, Class E, provided they are incidental to the enjoyment of the house.
Read the full garden room planning guide for the national rules and application process.
The CanUBuild checker surfaces real recent applications close to your address — approvals and refusals — so you can see what the planning officers at Royal Borough of Greenwich have approved for comparable schemes. Nearby precedent is one of the strongest signals for your own chances.
In Greenwich, the answer depends on whether your property sits in a conservation area (16% of the borough), is listed, or falls within an Article 4 direction. Most garden room proposals are permitted development for houses when they stay within GPDO limits and no local constraint applies. Check your exact address with the CanUBuild checker before spending on drawings.
Conservation areas in Greenwich typically remove several permitted development freedoms. For a garden room, the Larger Home Extension route and some external alterations do not apply, so a full householder application is usually required. Planning officers at Royal Borough of Greenwich assess conservation area proposals against the specific character appraisal for the street.
Royal Borough of Greenwich currently averages around 10 weeks for householder applications. Complex garden room proposals — particularly those in conservation areas or on listed buildings — can take longer. Prior approval decisions for Larger Home Extensions are typically issued in 42 days.
Address-level constraints and recent decisions around the corner. No drawings needed.