Garden room drawings in Lewisham
In Lewisham the permitted-development route for a garden room depends on your street's designation as well as the room's size. DrawingsDirect, MCIAT chartered architectural technologists, draws garden rooms for Lewisham gardens from £495, with the boundary, height and coverage tests worked on the plan.
Fixed fee from £495 · all prices
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Your street may carry a designation
Our analysis of the MHCLG Planning Data Platform (bulk snapshot retrieved 14 Aug 2026) finds 57 Article 4 direction entries and 30 conservation-area entries on the national register for Lewisham, and the Article 4 entries may not be a complete list. Either can change what you may build in a garden without a planning application.
Check the address on Lewisham Council's conservation area map as well as the national dataset before you commit to a supplier, and use our guide to conservation area extension rules if the street is designated.
Height, distance and coverage
Where no designation interferes, Class E of Part 1, Schedule 2 of the General Permitted Development Order 2015 applies. An outbuilding within 2 metres of the boundary may be no taller than 2.5 metres, and buildings, enclosures and containers together may not cover more than 50% of the curtilage excluding the original house. Read the clause on legislation.gov.uk.
We place the room on a scaled plan and measure from the fence line. An existing shed or greenhouse counts towards the same total, so it appears on the plan too.
Our analysis of MHCLG planning application statistics, table PS1, counts 722 certificates of lawful development decided by Lewisham over the eight quarters 2024 Q3 to 2026 Q2.
Exemptions from the Building Regulations
Under Schedule 2, Class 6 of the Building Regulations 2010, a detached building of up to 15 square metres with no sleeping accommodation is exempt, as is a single-storey detached building up to 30 square metres that has no sleeping accommodation and is at least one metre from the boundary or substantially non-combustible.
Use as a home office or studio fits those terms, but use as a bedroom does not. Our Building Regulations drawings in Lewisham cover the cases that fall outside.
Certificates of lawful development in Lewisham
Our analysis of MHCLG planning application statistics, table PS1, counts 722 certificates of lawful development decided by Lewisham over the eight quarters 2024 Q3 to 2026 Q2. A certificate is the council's confirmation that a building is lawful. Read do I need a lawful development certificate to decide whether to apply.
Cost and how to start
Garden room drawings start from £495; see the pricing page and the garden room drawings service page. Use the quote form with your Lewisham address, the room size and its position in the garden.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| 57 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 14 Aug 2026) | www.planning.data.gov.uk |
| 30 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 14 Aug 2026) | www.planning.data.gov.uk |
| 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 |
| 722 | 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
Is my Lewisham road under an Article 4 direction?
Does a garden studio count as sleeping accommodation?
What is the most a garden room can cover?
Photographs: Chris Whippet (CC BY-SA 2.0).
