Flat conversion drawings in Wandsworth
Splitting a Wandsworth house into flats needs planning permission, because in law it is a material change of use. We are MCIAT chartered architectural technologists and draw the application for a house to two flats from £1,195, on top of Wandsworth Council's fee of £610 for each additional dwelling.
Fixed fee from £995 drawings + £200 survey (£1,195 total) · all prices
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Is your Wandsworth project flats, a loft or a basement?
A loft, attic or basement conversion in Wandsworth is a different project from a flat conversion, and the difference decides which application you make. A conversion that makes two or more homes out of one house is a change of use and is covered on this page. A loft or a basement added to a single house is a different application, drawn on our loft conversion drawings and basement conversion drawings pages.
The legal test for splitting a house
Section 55(3)(a) of the Town and Country Planning Act 1990 treats the use as two or more separate dwellinghouses of any building previously used as a single dwellinghouse as a material change of use. Wandsworth therefore needs a planning application, whatever internal works you plan. Our guide to planning permission for converting a house into flats explains the reasoning.
Our analysis of the MHCLG Planning Data Platform (bulk snapshot retrieved 19 Oct 2026) finds 47 conservation-area entries for Wandsworth on the national register.
Wandsworth's numbers
Our analysis of MHCLG planning application statistics, table PS2 (released 24 Sep 2026, quarters to 2026 Q2) counts 2,123 Wandsworth decisions across every type of application from 2025 Q3 to 2026 Q2. A two-flat scheme is well short of major development, which gives the council 8 weeks from the day after receipt to decide it (DMPO 2015, article 34(2)(b)).
Our analysis of the Planning Inspectorate Casework Database (released 1 Oct 2026, Casework Database 2609) counts 204 householder appeals in Wandsworth decided between 2021 and 2026, with 36% allowed. Householder appeals are the nearest published comparison, and they say nothing about flats as such.
Conservation areas and the street elevation
Our analysis of the MHCLG Planning Data Platform (bulk snapshot retrieved 19 Oct 2026) finds 47 conservation-area entries for Wandsworth on the national register. Wandsworth Council's conservation area map shows whether your address is inside one; if it is, expect the front elevation of a conversion to be read closely. Our Article 4 direction guide covers the related restriction.
Costs: the statutory fee and our fixed fee
Splitting one house into two creates one additional dwellinghouse, so the council fee is £610: the rate for each extra home since 1 April 2026 where fewer than 10 result (SI 2012/2920, category 12(1)(a)).
We charge a fixed fee from £1,195 to draw a two-flat conversion for full planning and then Building Regulations. The pricing page lists the larger schemes, and the flat conversion drawings service describes the set. Source for the Act: legislation.gov.uk.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| £1,195 | DrawingsDirect starting fixed fee for house to two flats drawings (full planning and building regulations), from the published price list | drawingsdirect.co.uk |
| two or more separate dwellinghouses | Town and Country Planning Act 1990 s55(3)(a): using a building previously used as a single dwellinghouse as two or more separate dwellinghouses is a material change of use (source wording: "the use as two or more separate dwellinghouses of any building previously used as a single dwellinghouse") | www.legislation.gov.uk |
| £610 | Fees for planning applications in England from 1 April 2026 (MHCLG, SI 2012/2920 as annually indexed), category 12(1)(a): change of use of a single dwellinghouse to fewer than 10 dwellinghouses, per additional dwellinghouse (source wording: "£610 for each additional dwellinghouse") | assets.publishing.service.gov.uk |
| 2,123 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 8 weeks | DMPO 2015 art 34(2)(b): decision period for an application that is not major development (source wording: "8 weeks beginning with the day immediately following that on which the application is received") | www.legislation.gov.uk |
| 204 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 36% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 47 | Our analysis of MHCLG Planning Data Platform conservation-area and article-4-direction datasets (bulk snapshot retrieved 19 Oct 2026) | www.planning.data.gov.uk |
Questions people ask
Do I need planning permission for a loft conversion in Wandsworth?
How much does Wandsworth charge to turn a house into flats?
Is an attic or basement flat in Wandsworth a flat conversion?
Photographs: PAUL FARMER (CC BY-SA 2.0); Tim Green from Bradford (CC BY 2.0).
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