Rear extension drawings in Ealing from £625
Ealing’s own guidance gives two different depths for a rear extension, so we show which one your case officer is likely to hold you to.
£625 £475 drawings + £150 survey (£625 total), no VAT to add
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The short answer
Ealing’s older Residential Extensions SPD 4 says a single-storey rear extension up to 3 metres deep and 3 metres high will usually be acceptable. Its November 2022 Housing Design Guidance says 3.5 metres is likely to be acceptable, and beyond that needs a sound design justification. Permitted development allows 3 or 4 metres. Our fee is £475 drawings + £150 survey (£625 total), no VAT to add; the council’s fee is separate.
Rear extension drawings
from £625
- Drawings
- £475
- Measured survey
- £150
- Total you pay
- £625
- VAT
- None to add
- A measured survey of the back of the house, the garden levels and both neighbours’ extensions and windows
- A depth check against permitted development, SPD 4 and the 2022 guidance, with the route each depth needs
- A check of your address against Ealing’s conservation areas and Article 4 directions
- Existing and proposed plans, elevations and sections, with the 25 and 45 degree lines the 2022 guidance uses drawn on
- The CIL information form Ealing asks for, and the route that fits submitted for you
£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 an Ealing rear extension runs
Depth check
We compare your house type, the neighbours’ extensions and your street’s controls, then say what depth is safe.
Survey
We measure the rear wall, garden levels and the windows next door that the extension would face.
Design
You choose a depth and roof, and we write down which route each needs.
Draw and submit
We prepare the pack and submit it to Ealing, then answer the case officer.
Two Ealing documents, two depths
Ealing still uses its Residential Extensions SPD 4 as interim guidance. Section 5.0 says a single-storey extension with a maximum depth and height of 3 metres will be acceptable in most cases, as long as the house has not been extended before and is aligned with the neighbouring house. It allows a larger extension if the house is detached or the neighbour is a long way off.
The council’s Housing Design Guidance of November 2022 is more generous: as a general guide, rear extensions of 3.5 metres are likely to be acceptable, and going further needs a sound design justification that shows the massing protects neighbours. It also asks for massing to follow the 25 and 45 degree rules.
For example, a 3.5 metre kitchen on a terraced house that nobody has extended sits at the edge of both. We draw the neighbours’ windows and apply the angles, so you know before you commit whether an officer is likely to see 3.5 metres as ordinary or as something to justify.
Permitted development, and conservation areas
Under Class A a single-storey extension can be 3 metres deep on a terrace or semi and 4 metres on a detached house, or 6 and 8 metres through a larger home extension notice. Many Ealing extensions need no full application, and a certificate can prove it.
Ealing has 30 conservation areas, six of them with Article 4 directions that reach windows and doors. SPD 4 adds that in conservation areas an extension should not usually run across the full width of a rectangular house or wrap around the back and side, and 3 metres is the normal depth. Where permitted development is removed you need a householder application.
What Ealing asks for, and CIL
Ealing publishes no local validation list, so the national requirements apply, plus a design and access statement where one is needed and the CIL form. If information it asks for does not arrive within 28 days, the council returns the application and charges £45.
Ealing began charging its own CIL on 1 March 2026, at £300 a square metre in Central Ealing and half that elsewhere. Regulation 42 exempts new-build floor area under 100 square metres where no dwelling is created, so a typical rear extension sits outside it. Mayoral CIL is in band 2.
Rear extensions in Ealing in numbers
407 of 424
Householder decisions by Ealing Council 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)
3 m
Depth and height SPD 4 says will be acceptable in most cases for a single-storey rear extension on an unextended house aligned with its neighbour.
Source: SPD 4 Residential Extensions, section 5.0 Rear Extensions (Ealing Council)
3.5 m
Depth the November 2022 Housing Design Guidance says is likely to be acceptable, with design justification needed beyond it.
Source: Ealing Housing Design Guidance, November 2022, general design guidance item 7 (Ealing Council)
3 m / 4 m
Deepest single-storey extension permitted development allows; 6 and 8 metres through prior approval.
Source: GPDO 2015, Schedule 2, Part 1, Class A: enlargement of a dwellinghouse (legislation.gov.uk)
30
Conservation areas in Ealing, six of them with Article 4 directions that reach down to windows and doors.
None
Ealing publishes no local validation list: the national requirements apply, plus a design and access statement where required and the CIL form.
28 days
How long an applicant has to supply requested information before Ealing returns the application and charges £45.
Source: Planning application process: validation and returned applications (Ealing Council)
£300
Borough CIL per square metre for residential development in Central Ealing from 1 March 2026; the rest of the borough pays half.
Source: London Borough of Ealing CIL Charging Schedule, from 1 March 2026 (Ealing Council)
£72.73
Mayoral CIL per square metre for permissions granted in 2026 in Ealing, which is in band 2 (£60 when set in 2019). It applies only where CIL is due at all.
Source: Mayoral CIL: Annual CIL Rate Summary 2026 (London.gov.uk)
100 m²
New-build floor area below which CIL does not arise unless the work creates a dwelling.
Source: CIL Regulations 2010, regulation 42: exemption for minor development (legislation.gov.uk)
Questions about rear extensions in Ealing
How deep can I go in Ealing?
Permitted development gives 3 or 4 metres. For a full application, SPD 4 points to 3 metres and the 2022 guidance to 3.5. Beyond that you need a justified design.
Why do the council’s documents disagree?
SPD 4 is older interim guidance. The 2022 Housing Design Guidance is newer. We draw to the stricter figure unless your plot gives a reason not to.
Can I wrap the extension round the side?
SPD 4 says not usually on a rectangular house, and it is discouraged in conservation areas. A side return is a different design and we treat it separately.
Do I pay CIL on a kitchen extension?
Not normally. CIL arises at 100 square metres of new build or where a dwelling is created.
See how far your Ealing house can go
Send the address and a photo of the back. We reply with the route and a fixed fee, from £475 drawings + £150 survey (£625 total).