Garden room drawings in Bexley
A garden room in Bexley may not need planning permission if it stays within the outbuilding limits, but it still needs accurate drawings to show that it does. DrawingsDirect, MCIAT chartered architectural technologists, prepares garden room drawings for Bexley gardens from £495.
Fixed fee from £495 · all prices
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Two limits that shape most garden rooms
Under Class E of Part 1 of the General Permitted Development Order 2015, an outbuilding within 2 metres of the boundary of the garden can be no higher than 2.5 metres. Together, buildings, enclosures and containers must not cover more than 50% of the curtilage, leaving out the original house. Both limits are in Schedule 2, Part 1 on legislation.gov.uk.
On a Bexley plot, those two numbers decide where the room can sit. A scaled site plan that shows the boundary, the house and every other structure is the quickest way to find out whether your design fits.
When Building Regulations apply to a garden room
Schedule 2 of the Building Regulations 2010 exempts a detached building up to 15 square metres of floor area that has no sleeping accommodation. A single-storey detached building up to 30 square metres is also exempt, if it has no sleeping accommodation and is at least one metre from the boundary or substantially non-combustible.
So the exemption turns on size, distance and use. If the room will ever be slept in, or is larger than those figures, plan for Building Regulations drawings. Our Building Regulations drawings page explains what the submission holds.
Our analysis of the MHCLG Planning Data Platform (bulk snapshot retrieved 14 Aug 2026) finds 31 conservation-area entries on the national register for Bexley.
A lawful development certificate settles the question on paper
Our analysis of MHCLG planning application statistics, table PS1, finds that Bexley decided 586 certificates of lawful development over the eight quarters from 2024 Q3 to 2026 Q2. A certificate gives you the council's written view that a garden room is lawful, which is useful when you sell or refinance.
We prepare the drawings that go with an application: see lawful development certificate drawings and the guide on whether you need a lawful development certificate.
Conservation areas and the garden
Our analysis of the MHCLG Planning Data Platform (bulk snapshot retrieved 14 Aug 2026) finds 31 conservation-area entries on the national register for Bexley. Permitted-development outbuilding rights are narrower inside a conservation area and an Article 4 direction can remove them, so check your address on Bexley Council's conservation area map before ordering a prefabricated room.
Our guide to planning permission for a garden room lists the other checks.
Fee
Our fixed fee for garden room drawings starts from £495; see the pricing page and the garden room drawings service page. Send the address, the size you want and where it sits in the garden, using the quote form.
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 |
| 586 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 31 | 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 |
| £495 | DrawingsDirect starting fixed fee for garden room drawings, from the published price list | drawingsdirect.co.uk |