House extension drawings in Bexley
House extension drawings for a Bexley home start from £695 for a single-storey rear extension. The council granted 95% of the 877 householder applications it decided in the four quarters to 2026 Q2, and its 8-week figure for those outside prior approvals rounds to 100% (our analysis of MHCLG planning application statistics, table PS2).
Fixed fee from £495 drawings + £200 survey (£695 total) · all prices
Prefer to talk it through?
Bexley's decisions in four quarters
The 877 decisions cover everything householders apply for, from a porch to a two-storey rear extension, so the 95% grant rate is a borough average and not a promise about your scheme. Speed is the clearer signal: the figure for householder applications outside prior approvals decided within 8 weeks rounds to 100%.
Bexley's own conservation area map is the next check. The national register holds 31 conservation-area entries for the borough (our analysis of the MHCLG Planning Data Platform conservation-area dataset), and it may differ from the council's list.
Rear extension or side extension
A rear extension to a house that is not detached can go back 3 metres as permitted development, or 6 metres by prior approval (GPDO 2015, Schedule 2, Part 1, Class A, on legislation.gov.uk). A side extension is far more restricted, and on land in a conservation area it is not permitted development at all, so many side extensions need a householder application.
The council's fee for a householder application is £548 from 1 April 2026. Our rear extension drawings page for Bexley covers the back-of-house version in more detail.
Over the eight quarters from 2024 Q3 to 2026 Q2, Bexley determined 40 larger home extension prior approvals and granted 45% (our analysis of MHCLG planning application statistics, table PS1).
When a neighbour objects on daylight or outlook
Neighbours in Blendon, Lamorbey and elsewhere in the borough sometimes object that an extension will take daylight from a kitchen window or close in a garden. The council treats the effect on adjoining homes as a planning matter, and your drawings are what it reads: depth, height, the roof pitch and the position of the neighbour's windows.
Appeals show how often those disagreements end up outside the council. Of the 157 householder appeals the Planning Inspectorate decided for Bexley between 2021 and 2026, 34% were allowed (our analysis of the Planning Inspectorate Casework Database, release 2609). We draw to explain the scheme clearly. A daylight or sunlight report is a separate piece of work, so tell us at the start if the council or a neighbour has asked for one.
Prior approval for a larger home extension
Over the eight quarters from 2024 Q3 to 2026 Q2, Bexley determined 40 larger home extension prior approvals and granted 45% (our analysis of MHCLG planning application statistics, table PS1). That is a small sample, so treat the rate as a rough guide, but it is worth weighing if you want the extra depth.
Before you choose, read the prior approval guide.
Starting a Bexley project
Send us the address, a few photographs and the room you want to add. We check the designations on your road, tell you which application type fits and give a fixed fee. See the pricing page for other fees, the planning permission page for Bexley for the wider process, and floor plans in Bexley if you want the layout first.
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 |
| 877 | 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 |
| 100% | Our analysis of MHCLG planning application statistics, table PS2 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 157 | Our analysis of Planning Inspectorate Casework Database (released 1 Oct 2026 (Casework Database 2609)) | www.gov.uk |
| 34% | 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 |
| 40 | Our analysis of MHCLG planning application statistics, table PS1 (district open data table) (released 24 Sep 2026, quarters to 2026 Q2) | www.gov.uk |
| 45% | 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
Does Bexley approve most house extensions?
Can I build a side extension in Bexley without planning permission?
How much do house extension drawings cost in Bexley?
Photographs: Derek Harper (CC BY-SA 2.0).
