Garage conversion drawings in Purley
Garage conversion drawings for a Purley home start from £645. Whether Croydon Council needs an application depends on what happens outside: works that affect only the interior of a building are not development, and a lawful development certificate lets the council confirm your position in writing.
Fixed fee from £445 drawings + £200 survey (£645 total) · all prices
Prefer to talk it through?
Does a Purley garage conversion need planning permission?
Section 55(2)(a) of the Town and Country Planning Act 1990 says works that affect only the interior of a building, or that do not materially affect its external appearance, are not development. A garage conversion that stayed entirely inside would qualify. If the up-and-over door comes out and a wall and window go in, the front of the house changes, and the exemption may not settle the question on its own.
Whether that change is material is a matter of judgement for the council, and a neighbour or a later buyer's solicitor may ask the same question. Our guide to planning permission for a garage conversion sets out the checks, and your Purley road may also be covered by an Article 4 direction, which only the council can confirm.
Asking Croydon to confirm it with a lawful development certificate
A certificate of lawful development for a proposed use or operation costs half of the full application fee. For a householder project that is £274, against £548 for the householder planning application itself (SI 2012/2920 as indexed from 1 April 2026; the £274 is our arithmetic on the published rule).
Our analysis of MHCLG planning application statistics, table PS1 (released 24 Sep 2026, quarters to 2026 Q2) counts 1,005 certificates of lawful development decided by Croydon over the eight quarters from 2024 Q3 to 2026 Q2, for all kinds of work. The certificate gives you a document to hand to a mortgage lender or a buyer. We explain it on our lawful development certificate drawings page.
Our analysis of the Planning Inspectorate Casework Database (released 1 Oct 2026, Casework Database 2609) counts 287 householder appeals in Croydon decided between 2021 and 2026, with 39% allowed.
If Croydon wants a full application
Our analysis of MHCLG planning application statistics, table PS2 (released 24 Sep 2026, quarters to 2026 Q2) shows Croydon decided 786 householder applications, including prior approvals, over the four quarters from 2025 Q3 to 2026 Q2. Of those, 87% were granted.
Householder figures are the nearest comparison for a garage conversion that alters the outside of the house; they do not predict your own decision. Clear existing and proposed plans and elevations, with the new window and infill wall drawn to scale, are what the case officer reads first.
Croydon appeals and conservation areas
Our analysis of the Planning Inspectorate Casework Database (released 1 Oct 2026, Casework Database 2609) counts 287 householder appeals in Croydon decided between 2021 and 2026, with 39% allowed. It is a record of the past, and it covers every kind of householder work.
Our analysis of the MHCLG Planning Data Platform (bulk snapshot retrieved 14 Aug 2026) finds 20 conservation-area entries for Croydon on the national register. Croydon Council's conservation area map shows whether your Purley address sits inside one; our conservation area guide explains what a designation changes.
What the £645 buys
Our starting fixed fee for garage conversion drawings on the permitted development route is £645. The garage conversion drawings service describes the set, and the pricing page shows the fees where an extension or a different route changes the work. When a conversion also needs the Building Regulations stage, see our building regulations drawings.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| £645 | DrawingsDirect starting fixed fee for garage conversion drawings (permitted development route), from the published price list | drawingsdirect.co.uk |
| only the interior | Town and Country Planning Act 1990 s55(2)(a): works that affect only the interior of a building, or do not materially affect its external appearance, are not development (source wording: "affect only the interior of the building, or") | www.legislation.gov.uk |
| £274 | Fees for planning applications in England from 1 April 2026 (MHCLG, SI 2012/2920 as annually indexed): certificate of lawful development for a proposed use or operation is half the full application fee; for a householder project that is half of £548 (source wording: "Half the Full Application fee"; the £274 is our arithmetic) | assets.publishing.service.gov.uk |
| £548 | Fees for planning applications in England from 1 April 2026 (MHCLG, SI 2012/2920 as annually indexed), category 6(1): householder application for the enlargement, improvement or alteration of a single dwellinghouse (source wording: £548) | assets.publishing.service.gov.uk |
| 1,005 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 786 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 87% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 287 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 39% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 20 | 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 |
Questions people ask
Does bricking up a garage door in Purley need planning permission?
Do I need a lawful development certificate for a garage conversion in Croydon?
How much do garage conversion drawings cost in Purley?
Photographs: Derek Harper (CC BY-SA 2.0).
