Rear extension drawings in Kensington and Chelsea
A rear or house extension in Kensington and Chelsea is decided as a householder application: the borough made 664 householder decisions in the four quarters to 2026 Q2 and granted 94% (our analysis of MHCLG planning application statistics, table PS2). Our drawings for a single-storey rear extension start from £695.
Fixed fee from £495 drawings + £200 survey (£695 total) · all prices
Prefer to talk it through?
Start with the conservation area map
The national register holds 41 live conservation-area entries for Kensington and Chelsea (our analysis of the MHCLG Planning Data Platform conservation-area dataset). Whether your house sits in one is shown on the borough's own conservation area map, and it is the first thing to check, because it changes which extension rights apply. Our conservation area extension guide explains how, and the Article 4 direction glossary entry covers the further restrictions a council can add.
How the borough decides householder cases
Of the 664 householder decisions, 94% were grants, and 92% of the householder decisions that were not prior approvals were made within 8 weeks (our analysis of MHCLG planning application statistics, table PS2). The first figure includes prior approvals, so read it as the borough's general stance on home alterations.
Appeals show the other side. Since 2021, 182 householder appeals have been decided for the borough and 42% were allowed (our analysis of the Planning Inspectorate Casework Database). Those cases tell you how inspectors have read the borough's policies, not how yours will go, and the planning appeal glossary entry explains the route.
The council's own fee for a householder application is £548 from 1 April 2026, paid with the application.
The 3 metre and 6 metre question
A single-storey rear extension to a house other than a detached one may project up to 3 metres beyond the original rear wall under permitted development, and up to 6 metres through the larger home extension prior approval (General Permitted Development Order, Schedule 2 Part 1). The borough determined 0 larger home extension prior approvals in the eight quarters to 2026 Q2 (our analysis of MHCLG planning application statistics, table PS1), so the 6 metre route has no recent record in this borough. See the larger home extension guide for the route itself.
What our drawings cover and cost
For a rear extension we survey the house and draw existing and proposed plans, elevations and sections, plus the block plan the application needs. The published price list starts that package at £695; the pricing page shows the other fixed fees, and the rear extension drawings page lists what each set holds.
The council's own fee for a householder application is £548 from 1 April 2026, paid with the application.
Sources
Every figure on this page, where it comes from and a link to the original.
| Figure | Source | Link |
|---|---|---|
| £695 | DrawingsDirect starting fixed fee for single-storey rear extension drawings (survey and planning or permitted development drawings), from the published price list | drawingsdirect.co.uk |
| 3 metres | GPDO 2015 Sch 2 Pt 1 Class A.1(f)(i): a single-storey rear extension may extend beyond the rear wall of the original house by up to 3 metres, house other than detached (source wording: 3 metres) | www.legislation.gov.uk |
| 6 metres | GPDO 2015 Sch 2 Pt 1 Class A.1(g): larger home extension under the prior approval process (A.4), house other than detached, up to 6 metres beyond the original rear wall (source wording: 6 metres) | www.legislation.gov.uk |
| 664 | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 94% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 92% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 182 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 42% | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 41 | 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 |
| 0 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.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 |
Questions people ask
How many householder applications does Kensington and Chelsea grant?
Is my house in a conservation area?
What does a house extension cost in drawings?
Photographs: Marathon (CC BY-SA 2.0); John Lord (CC BY-SA 2.0); David Howard (CC BY-SA 2.0).
