Loft conversion drawings in Kensington and Chelsea from £625
Notting Hill, Kensington, Chelsea, Earl’s Court and North Kensington: the Royal Borough rejects drawings that need more than A3, and lists Article 4 streets one by one.
£625 £475 drawings + £150 survey (£625 total), no VAT to add
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The short answer
The Royal Borough will deem an application invalid if a drawing has to be printed larger than A3, and wants a scale bar showing 1 metre and 10 metre lengths on every sheet. Its Article 4 directions in conservation areas are listed street by street with a start date for each, and cover roof coverings among other front-elevation works. Our fee is £475 drawings + £150 survey (£625 total), no VAT to add; the council’s fee is separate.
Loft conversion drawings
from £625
- Drawings
- £475
- Measured survey
- £150
- Total you pay
- £625
- VAT
- None to add
- A measured survey of the roof, the stair and the landing below
- A check of your street and house number against the Royal Borough’s Article 4 list
- Existing and proposed floor plans, elevations and sections at 1:50, titled, dated and sized for A3, with a 1 and 10 metre scale bar
- Location and block plans at the scales the list asks for, and the ownership certificate
- Submission to the Royal Borough, an independent check of every sheet and free redraws until approval
£475 drawings + £150 survey (£625 total). A starting fee: we confirm one fixed figure after checking your address. The council’s own fee, where there is one, is paid to the council.
Get my fixed feeHow a Kensington and Chelsea loft job runs
Address check
We look up your street and number on the council’s Article 4 table, and note the conservation area and any listing.
Survey
We measure the roof, the stair and the floors below, and photograph the roof from the street and the back.
Draw for A3
Each sheet is titled, dated and numbered, with the print size, the scale at that size, key dimensions and a north arrow, and fits A3.
Submit and follow
We submit through the Planning Portal, as the council advises, with every document in one go.
The Article 4 table: street, numbers, date
The Royal Borough says its conservation area Article 4 directions aim to control small scale changes to the outside of houses, such as changing windows, front doors, rebuilding boundary walls and roof coverings, often to the front elevations. Its table lists each street, the property numbers covered, an article number and a start date, for example Abingdon Road from 1988 and Addison Avenue from 6 July 2012.
For example, a loft at 24 Addison Avenue is checked against the 2012 direction before anything is drawn. Because the table is by house number, two houses in one terrace can be in different positions, which is why we check the number rather than the postcode.
What the March 2023 submission requirements ask for
The council will not accept documents that need paper larger than A3 and says it will deem such an application invalid. Drawings are at 1:50 or 1:100, with 1:50 preferred, titled and dated, with the print size, the scale at that size, a scale bar showing lengths of 1 metre and 10 metres, key dimensions and a north arrow. Existing and proposed elevations should sit beside each other where possible.
A design and access statement is required for development in a conservation area where the floor space created is 100 square metres or more. The fire statement is for major development and buildings that need Planning Gateway One approval, not a house loft.
Timing and CIL in Kensington and Chelsea
The Royal Borough decided 252 of 274 householder applications inside eight weeks in the year to June 2026, which makes a valid first submission the main thing in your control.
Its CIL varies by zone: in Zones A and B the 2015 residential rates were £750 and £590 per square metre, which are £1,158.30 and £911.20 for permissions granted in 2026. Other zones are lower. CIL generally applies from 100 square metres, so a loft is usually outside it. Mayoral CIL is band 1.
Loft conversions in Kensington and Chelsea in numbers
252 of 274
Householder decisions by the Royal Borough of Kensington and Chelsea between July 2025 and June 2026 (prior approvals left out) that were made inside 8 weeks.
Source: MHCLG live table PS2, district planning application statistics, July 2025 to June 2026 (GOV.UK)
10 Mar 2023
Date of the Royal Borough’s Submission Requirements for Planning Applications.
A3 maximum
Documents needing paper larger than A3 are not accepted, and the application will be deemed invalid.
1 m and 10 m
Scale bar lengths every drawing must show, with key dimensions and a north arrow.
1:50 or 1:100
Scales for elevations, floor plans and sections, with 1:50 often preferable.
100 m²
Floor space created in a conservation area from which a design and access statement is required.
By street
Article 4 directions in conservation areas are listed by street, property numbers, article number and start date.
Source: Article 4 Directions in Conservation Areas (Royal Borough of Kensington and Chelsea)
£1,158.30 and £911.20
Residential CIL per square metre in Zone A and Zone B for permissions granted in 2026, from £750 and £590 in 2015.
£96.97
Mayoral CIL per square metre for permissions granted in 2026 in Kensington and Chelsea, which is in band 1 (£80 when set in 2019). It applies only where CIL is due at all.
Source: Mayoral CIL: Annual CIL Rate Summary 2026 (London.gov.uk)
Questions about loft conversions in Kensington and Chelsea
Why does the Royal Borough insist on A3?
Its list says it will not accept documents needing larger paper, and an application with larger drawings is deemed invalid. We draw every sheet to fit A3.
Is my house on the Article 4 list?
The table is by street and property number. Send your address and we check it.
Do I need a fire statement for a loft?
Not for a house. The list asks for one on major development and Planning Gateway One buildings.
Will I pay CIL on a loft?
Normally not. CIL generally starts at 100 square metres of new floor area.
Find out what your Kensington and Chelsea loft needs
Send the address and a photo of the back of the house. We reply with the route and a fixed fee, from £475 drawings + £150 survey (£625 total).