Rear extension drawings in Wandsworth from £625
Battersea, Putney, Tooting and Balham: Wandsworth’s guide sets no depth in metres, so we test your neighbour’s daylight before we draw.
£625 £475 drawings + £150 survey (£625 total), no VAT to add
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The short answer
Wandsworth’s Housing SPD of November 2016 gives no depth for a rear extension in metres. It says the extension must respect the shape of the house, not be over-dominant, and leave your neighbours enough daylight by the BRE method. The neighbour on the north side is named as the one most affected. Permitted development gives 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 and both neighbours’ windows and extensions
- A daylight and outlook check on the neighbour who sits to the north of you, before you choose a depth
- A check of your address against Wandsworth’s Article 4 estates and its 46 conservation areas
- Existing and proposed plans and elevations, drawn with a scale bar on every sheet as the council requires
- The route that fits submitted for you, and answers to the case officer
£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 Wandsworth rear extension runs
Neighbour check
We find which side is north, where the neighbours’ habitable windows are, and what they have already built.
Survey
We measure the back, the garden levels and the windows next door.
Design
You choose a depth and height, with the daylight and route consequences in writing.
Draw and submit
We prepare the pack to the local requirements and submit it, then answer the case officer.
No number, so the neighbour decides
Wandsworth’s Housing SPD says rear extensions should respect the shape and form of the existing house and not be over dominant. Its test is the neighbour. A large extension, the guide says, may cause a loss of outlook or daylight or be overbearing, which is most likely for a neighbour on the north side of the proposed extension. Daylight is assessed against the Building Research Establishment guide, and the council may ask for the size to be cut if overshadowing is unreasonable.
The guide’s general rules are to keep the height and bulk on the boundary to a minimum, especially on the south side, and to avoid two-storey extensions directly on a boundary. For example, a 4 metre kitchen on a south-facing terraced house in Tooting casts its shadow on the neighbour to the north; the same kitchen on the north side casts none on them. So the same depth is an easy case in one house and an argument in the next.
Estates, conservation areas and permitted development
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. Wandsworth has 46 conservation areas and a list of estates, among them Shaftesbury Park, Heaver and Totterdown Fields and Latchmere, where Article 4 directions remove further rights. Latchmere’s direction extends to extensions.
On those estates a rear extension that would be permitted elsewhere needs a householder application. Wandsworth’s test also asks that the extension leave a substantial part of the original garden free: for basements the guide says at least half the back garden, and the same principle shapes how far out a ground-floor extension can go.
What Wandsworth asks for, and CIL
A drawing without a scale bar makes an application invalid, and the council allows two months to supply missing information. Anything touching a heritage asset needs a statement by a specialist historic environment consultant, and a tree survey is asked for where trees stand on or next to the site.
The borough charges CIL of £250 a square metre outside Nine Elms and Roehampton before indexation, on new-build floor area of 100 square metres or more. A typical rear extension is below that. Mayoral CIL is in band 1.
Rear extensions in Wandsworth in numbers
597 of 657
Householder decisions by Wandsworth 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)
No depth
The Housing SPD gives no depth in metres: extensions must respect the house’s shape, not be over-dominant, and leave neighbours adequate daylight by the BRE standards.
Source: Housing SPD, adopted November 2016, paragraphs 4.21 to 4.25: rear extensions (Wandsworth 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)
46
Conservation areas in Wandsworth.
8
Estates and areas the council lists with Article 4 controls, from Dover House to parts of Wandsworth Common.
Scale bar
Without one on a drawing the application is invalid, and two months are allowed to supply missing information.
Consultant
A heritage statement for any heritage asset must come from a specialist historic environment consultant.
Source: Wandsworth local planning application requirements (Wandsworth Council)
£250
Borough CIL per square metre for residential outside Nine Elms and Roehampton, before annual indexation.
£96.97
Mayoral CIL per square metre for permissions granted in 2026 in Wandsworth, 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)
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 Wandsworth
How deep can a rear extension be in Wandsworth?
The council sets no figure. Permitted development gives 3 or 4 metres; beyond that the neighbour’s daylight and outlook decide, with the north-side neighbour most affected.
Does the direction of the sun matter?
Yes. The council’s guide says the harm is greatest for a neighbour on the north side of the extension, and asks for low bulk on the south boundary.
Which Wandsworth estates have Article 4 directions?
The council lists Dover House, Latchmere, Heaver, Shaftesbury Park, Totterdown Fields, Putney Lower Common, Roehampton Village and parts of Wandsworth Common. See its Article 4 page or send us your address.
Do I pay CIL on a kitchen extension?
Almost never. CIL arises at 100 square metres of new build or where a dwelling is created.
See how far your Wandsworth 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).