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How much does a Lawful Development Certificate cost in London?

A Lawful Development Certificate for proposed work costs £539 with us: £389 for the drawings and £150 for the measured survey, with no VAT to add. The council charges its own fee on top, which for a householder extension is £274, so £813 in all.

From £539 with the survey

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Written by
The Drawings4Planning technical teamChartered architectural technologists (MCIAT)
Published
Updated
Reading time
4 min
Topic
Planning permission

A curving street of 1930s semi-detached houses in red brick and white render in Exeter, a grey car parked in the foreground. Photo: David Smith, CC BY-SA 2.0.

Why does the council charge £274 and not £548?

Because the fee depends on what the certificate is about. For a proposed use or operation the council charges half of the full application fee. A householder application is £548, so the certificate is £274; for work already carried out it is the same as the full fee (fee schedule).

That rule makes the certificate route kinder to the wallet than planning permission whenever the work truly is permitted development, and it is why we test the rules first, before anyone pays a council fee for the wrong paper.

Certificate for a proposed extension or loft
Permitted development drawings and forms paid to us£389
Measured survey of the house paid to us£150
Council certificate fee (half the planning fee) paid to the council£274
Total£813

Total £813: £539 to Drawings4Planning and £274 to the council.

What are you buying for the money?

A decision, in writing, that the work is lawful. The certificate is made under section 192 of the Town and Country Planning Act 1990 (s.192), and the council gets there by comparing your drawings to the permitted development rules, not by weighing design or neighbours’ views. It is also not a permission: nothing forces you to apply.

The reward for applying is certainty. Once granted, the work must be presumed lawful unless a material change happens before you begin, such as an Article 4 direction that removes the right you relied on (gov.uk guidance). Your neighbours are not automatically consulted either, as there is no statutory requirement to consult them.

When does it stop being the cheaper route?

When the work breaks a permitted development limit. A single-storey rear extension deeper than 3 m (4 m detached) needs the prior approval notice, up to 6 m (8 m detached) (GPDO Class A), and a flat has no such rights at all. An application that cannot succeed wastes the £274 as well as our fee.

That is why the £539 is spent on the check as much as on the drawings. If your idea fails, we tell you before you pay the council and point you to the route that fits: a notice, or a householder application.

A tall red-brick Victorian house with bay windows and a front garden on a London street
A Victorian brick house with bay windows on a London street. Photo: Lorenc Memaga, Pexels License.

What does a certificate not cover?

Building regulations. A certificate speaks about planning only, so your extension still needs its own approval from building control. Our building regulations set is £479 when we have already surveyed the house, so the full journey to a buildable set of drawings costs £1,018 to us (£539 plus £479).

Larger or more mixed projects, such as a rear extension combined with a roof enlargement, are priced as a range from £539 to £849 in total (£389 to £699 in drawings plus the £150 survey). We say which side of the range you are on before you commit.

Where the figures come from

£274
Half of the £548 householder fee, the council’s charge for a certificate for proposed work. National fee schedule, published by Bradford Council
Full fee
A certificate for an existing use or operation costs the same as a full application. National fee schedule, published by Bradford Council
s.192
The section of the 1990 Act that allows a certificate for proposed use or operations. Town and Country Planning Act 1990, s.192
Presumed lawful
Work done in line with a certificate is presumed lawful unless a material change happens first. gov.uk, Lawful development certificates
No consultation
There is no statutory requirement for the council to consult neighbours on a certificate. gov.uk, Lawful development certificates
3 m / 4 m
Deepest single-storey rear extension without a notice: terraced or semi-detached / detached. GPDO 2015, Sch. 2 Part 1, Class A

Certificate cost questions

Do I have to get a Lawful Development Certificate?

No. It is optional and the planning rules apply with or without it. People apply to hold proof, often because a buyer’s solicitor may ask for it later.

Source: gov.uk, Lawful development certificates

Is the £274 refunded if the council says no?

No. The fee pays for the council’s decision, whichever way it goes. That is why we check the permitted development rules against the survey before the application is sent.

Can I get a certificate for an extension I already built?

Yes, as an existing-use certificate, but the council fee is then the full £548 and the evidence needs to show when the work was done. Our retrospective service covers work that needs permission rather than a certificate.

Source: National fee schedule from 1 April 2026

Does the price change if I am in a conservation area?

The price does not, but the answer can: roof enlargements such as dormers are not permitted development on conservation area land, so a householder application is the route there.

Full details of the service: Lawful Development Certificate.

Check if you can skip planning

Give us your postcode and the work you want. We test it against the permitted development limits first, then confirm the £539 or point you to the right route.

What £539 gets you

  • A measured survey of the house and boundaries
  • Existing and proposed drawings drawn to the permitted development rules
  • A written check of each limit, with the figure for your house
  • Forms and submission to the council
  • Free redraws until approval