Flat conversion drawings for houses in Stanmore, HA7
Splitting a Stanmore house into two flats needs a planning application, because the law counts using a single dwellinghouse as two or more separate dwellinghouses as a material change of use. Our drawings for a house to two flats, covering full planning and building regulations, start at a fixed £1,195 with no VAT to add.
Fixed fee from £995 drawings + £200 survey (£1,195 total) · all prices
Prefer to talk it through?
Why two flats means a full planning application
Section 55 of the Town and Country Planning Act describes the use as "two or more separate dwellinghouses of any building previously used as a single dwellinghouse" as a material change of use. That wording is the reason a Stanmore semi or detached house cannot simply be divided and let: the change itself is development, so it goes through the planning system, and the drawings are what the application rests on.
If you found this page by searching for a loft conversion in Stanmore, note that this page is about dividing a house into flats. A loft is a separate service with its own drawings.
What the drawings cost, and what Harrow charges on top
Our starting fixed fee for house to two flats drawings is £1,195 with no VAT to add, and it covers both the full planning set and the building regulations set. It is the published price, not a figure that appears after a form.
The council's own application fee is a separate charge. For a change of use of a single dwellinghouse to fewer than 10 dwellinghouses, the national fee schedule from April 2026 is £610 for each additional dwellinghouse. That money goes to the council, not to us, so budget for it alongside the drawing fee.
The Planning Inspectorate decided 320 householder appeals in Harrow between 2021 and 2026, and 43% of them were allowed.
How Harrow's planning decisions look in numbers
Harrow decided 1,362 planning applications of all kinds over the latest four quarters of published government statistics. Of those, 917 were householder applications.
Householder figures are the closest published measure we have for this council, but they are extensions and alterations, not flat conversions, so treat them as background on how busy the planning team is and how householder cases have gone, not as a forecast for a conversion. Of those householder decisions, 82% were granted.
How long a decision can take
For an application that is not major development, the statutory decision period is 8 weeks beginning with the day after the council receives it. Confirm the period that applies to your scheme when the application is registered.
Across the same four quarters, 95% of Harrow's householder decisions, excluding prior approvals, were made within 8 weeks. Again that is householder work, and a conversion case may follow a different path.
If an application is refused: appeals in Harrow
The Planning Inspectorate decided 320 householder appeals in Harrow between 2021 and 2026, and 43% of them were allowed. Appeals take time and add cost, so it pays to get the first submission right.
These are householder appeals, not flat conversion appeals, so they show that refusals in the borough are challenged and sometimes overturned, nothing more specific than that.
Conservation areas: check your street before you plan the layout
Harrow has 31 live conservation areas on the national Planning Data Platform. We cannot tell you from that count which of them touch your road in Stanmore, so look up your address before committing to a layout, because a designation can change what is worth proposing on the front and sides of the house.
The practical order is to confirm the address, decide how the rooms divide into two homes, then have the drawings prepared for that arrangement, rather than drawing first and discovering a constraint afterwards.
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), with no VAT to add, 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 |
| 917 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 82% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 95% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 320 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 43% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | 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 |
| 1,362 | 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 |
Photographs: Tim Green from Bradford (CC BY 2.0).
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