Garden room drawings by London borough
The national rules for a garden room are the same in every London borough, but whether they apply to your garden depends on the council's designations at your address. DrawingsDirect, MCIAT chartered architectural technologists, draws garden rooms across London from £495. Choose your borough below.
Fixed fee from £495 · all prices
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What is the same everywhere
Class E, Part 1, Schedule 2 of the General Permitted Development Order 2015 limits an outbuilding within 2 metres of the garden boundary to 2.5 metres in height, and limits all buildings, enclosures and containers to 50% of the curtilage, excluding the original house. See the clause on legislation.gov.uk.
The Building Regulations 2010 (Schedule 2, Class 6) exempt a detached building of no more than 15m2 with no sleeping accommodation, and a single-storey one of no more than 30m2 with no sleeping accommodation that is at least one metre from the boundary or substantially non-combustible.
What changes from one borough to the next
The local variables are designations and practice: conservation areas, Article 4 directions that remove permitted rights, and how the council handles certificates. Our analysis of MHCLG planning application statistics, table PS1, counts 84,906 certificates of lawful development decided by all English local planning authorities over the eight quarters from 2024 Q3 to 2026 Q2, so a certificate is a routine application, not an unusual one.
The pages below cover the local checks for each council. Read our guide on whether a garden room needs planning permission for the full checklist.
Garden room drawings start from £495; see the pricing page.
Borough pages
Garden room drawings in Bexley covers conservation areas and the outbuilding limits.
Garden room drawings in Harrow works through height, boundary distance and coverage on narrow plots.
Garden room drawings in Hillingdon starts with the borough's Article 4 directions.
Garden room drawings in Lewisham checks Article 4 directions and conservation areas first.
Garden room drawings in Richmond is for homes in the London Borough of Richmond upon Thames.
Garden room drawings in Upper Edmonton, N18 is for N18 addresses in the London Borough of Enfield.
Fee and what we draw
Garden room drawings start from £495; see the pricing page. The set holds a scaled site plan, floor plan and elevations, and is described on the garden room drawings page. If your borough is not listed, use the quote form and give us the address.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| 2.5 metres | GPDO 2015 Sch 2 Pt 1 Class E.1(e)(ii): outbuilding within 2 metres of the curtilage boundary, max height (source wording: 2.5 metres) | www.legislation.gov.uk |
| 50% | GPDO 2015 Sch 2 Pt 1 Class E.1(b): buildings, enclosures and containers must not cover more than 50% of the curtilage (excluding the original house) | www.legislation.gov.uk |
| 15m2 | Building Regulations 2010 Sch 2 Class 6 para 3: exempt detached building with floor area not exceeding 15m2 and no sleeping accommodation (source wording: 15m2) | www.legislation.gov.uk |
| 30m2 | Building Regulations 2010 Sch 2 Class 6 para 1: exempt detached single-storey building not exceeding 30m2, no sleeping accommodation, at least one metre from the boundary or substantially non-combustible (source wording: 30m2) | www.legislation.gov.uk |
| 84,906 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| £495 | DrawingsDirect starting fixed fee for garden room drawings, from the published price list | drawingsdirect.co.uk |
Questions people ask
Do I need permission for a garden room in London?
Which borough page should I use?
Is every borough's fee the same?
Photographs: David Hawgood (CC BY-SA 2.0).
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