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A loft bedroom with a pitched ceiling, two roof windows and glazed doors opening to a balcony

Loft conversion plans in Kingston upon Thames, £589

The Royal Borough lists a roof extension among the cases that need a 25 degree elevation plan, and wants sections that run through the loft space. We draw both from the roof survey.

  • £439 drawings + £150 survey (£589 total)
  • 25 degree elevation
  • Section through the loft

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What do loft drawings cost in Kingston?

The total is £589: £439 for drawings and submission and £150 for the survey, with no VAT to add. The Royal Borough’s fee is paid to the council.

In the Kingston loft fee

  • A roof survey, with neighbours’ windows noted
  • A roof plan at 1:50 to 1:200 showing roofing materials and features
  • Elevations at 1:50 or 1:100 and the 25 degree elevation plan where it applies
  • A section through all floors including the loft space and roof
  • The completed biodiversity checklist, and submission
From a tape measure in your loft to a submitted set
From a tape measure in your loft to a submitted set: Roof check, then Roof survey, then Route chosen, then Drawings issued, then SubmittedRoof checkType, ridge height,neighboursRoof surveyRafters, purlins,headroomRoute chosenPermitted,certificate orplanningDrawings issuedAbout 7 days aftersurveySubmittedWe deal with theofficer

What Kingston asks for a roof extension

Kingston’s householder list asks for existing and proposed roof plans for any change to the roof, showing the shape of the roof, the roofing materials and features such as chimneys and windows, and sections through the building to include “the basement, loft space and roof” (Kingston local list).

A 25 degree elevation plan and statement is needed where the development is above 2 storeys in height, for example a roof extension. If it fails the rule of thumb a Daylight and Sunlight Report must be submitted.

Conservation areas and local directions

Kingston has 26 conservation areas (Kingston conservation guidance), and Class B is closed in each of them. Its Article 4 directions cover Seething Wells Filter Beds, commercial to residential use, and North Lodge and South Lodge (Kingston Article 4); none restricts ordinary house roofs. For example, a rear dormer on a semi outside the conservation areas can be tested for a certificate first.

Timescale

Kingston decided 593 of 638 householder applications inside 8 weeks in the year to June 2026. Every householder application also needs a completed Biodiversity Checklist, which matters for a roof void that wildlife may use.

Kingston lofts in numbers

593 of 638
The Royal Borough of Kingston householder applications decided within 8 weeks in the year to June 2026, out of all it decided (prior approvals not counted). MHCLG live table PS2, planning application statistics by district, July 2025 to June 2026 (GOV.UK)
25 degrees
Elevation plan and statement Kingston asks for where development is above 2 storeys, such as a roof extension. Kingston: householder validation local list, Feb 2024
Loft space
Kingston wants sections through a building to include the loft space and roof. Kingston: householder validation local list, Feb 2024
1:50 to 1:200
Scales Kingston accepts for roof plans. Kingston: householder validation local list, Feb 2024
26
Conservation areas in Kingston, covering 9.4% of the borough. Kingston: conservation area general guidance
3
Article 4 directions Kingston currently lists, none on house roofs. Kingston: Article 4 directions page
40 m³ / 50 m³
Permitted roof volume increase: 40 m³ for a terraced house, 50 m³ for other houses. GPDO 2015, Schedule 2, Part 1, Class B: additions to the roof (legislation.gov.uk)
£72.73 per m²
The Mayor of London’s CIL in Kingston (band 2) for permissions granted in 2026, owed only when a scheme is liable for CIL in the first place. Mayoral CIL: annual rate summary for 2026, Table 1 (Greater London Authority)

Kingston loft questions

What is the 25 degree rule for a Kingston loft?

A daylight test on elevations, required where development rises above 2 storeys such as a roof extension. We draw and annotate it.

What must the section show?

Kingston wants sections through all floors including the loft space and roof.

Is my Kingston loft in a conservation area?

Kingston has 26. We check your address before quoting, because Class B does not apply in them.

Is a biodiversity checklist needed for a loft?

Yes, every Kingston householder application needs one. We complete it.

Check your Kingston roof

Send the address and a roof photo. We tell you the route and quote a fixed fee.

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