CIL surcharges for failing to notify the start of works
The Community Infrastructure Levy regime attaches a prescribed surcharge to each missed notice, and a commencement notice served late removes a self-build exemption altogether.
Two pieces of paper decide whether a self-build home costs you nothing in Community Infrastructure Levy or the full charge plus a surcharge: the assumption of liability form and the commencement notice. Both have to reach the collecting authority before work starts. Miss the commencement notice and the Levy Regulations impose a surcharge of 20 per cent of the chargeable amount or £2,500, whichever is lower, and if you were relying on the self-build exemption you lose it outright and the whole levy falls due immediately.
That is the single most expensive administrative error in English development, and it is made by competent people every month.
The notices the levy regime requires
The Community Infrastructure Levy Regulations 2010, as amended, build a sequence of notices around a chargeable development. The collecting authority issues a liability notice once permission is granted and the development is chargeable. Someone then has to assume liability. Any exemption or relief has to be claimed and granted. Immediately before work starts, a commencement notice has to be served. Payment then falls due on the instalment dates in the authority's published policy.
Each step has a surcharge attached to its omission, and the surcharges are not discretionary in the sense most people hope. They are prescribed amounts triggered by prescribed failures.
The levy is a cost line like any other, and on a small scheme it sits alongside section 106 contributions and the highway works that an appraisal has to carry, which is why it belongs in the budget from the start rather than appearing after permission. The same discipline applies to highway works costs in a development appraisal.
Assumption of liability, and why it matters
Assumption of liability is a form that names the person who will pay. It can be submitted by anyone with a material interest, and it can be withdrawn or transferred before commencement.
Where nobody assumes liability, the levy falls on the owners of the relevant land interests by default, apportioned between them, and a surcharge applies for the failure to assume. That default is uncomfortable for anyone selling a serviced plot, because an unassumed liability follows the land rather than the developer who obtained permission.
For a self-builder the form does more than nominate a payer. It is a precondition of the self-build exemption. You cannot claim the exemption without having assumed liability, and the claim has to be granted before you break ground.
Notifying the authority before work starts
The commencement notice tells the authority the date development will begin. It has to be submitted so that the authority receives it before the chargeable development begins. Not on the day. Before.
What counts as commencement is wider than most people assume. It follows the material operations test in the Town and Country Planning Act 1990, which includes digging foundation trenches, laying out an access road, demolition and work that forms part of the erection of the building. Clearing scrub probably does not count. Taking out a hedge and grading a plot access almost certainly does.
| Failure | Consequence under the regulations |
|---|---|
| No assumption of liability | Surcharge of £50 for each person liable, and liability apportioned to landowners |
| No commencement notice | Surcharge of 20 per cent of the chargeable amount or £2,500, whichever is lower |
| Exemption claimed but no commencement notice served | Exemption withdrawn, full levy payable immediately, plus the surcharge |
| Late payment | Further surcharges at prescribed intervals after the due date, plus interest |
| Failure to respond to an information notice | Surcharge calculated as a percentage of the amount, capped |
Interest on unpaid levy runs at 2.5 percentage points above the Bank of England base rate. Check the current regulations for the exact surcharge figures and intervals before you rely on a number from an old job, because the regime has been amended several times.
Losing an exemption by missing a notice
The self-build exemption and the residential extension and annex exemptions all work the same way. You claim, the authority grants, you serve a commencement notice, you build, and for a self-build home you then submit the completion evidence within the period the regulations allow.
The order is not negotiable. A claim submitted after work has begun cannot be granted. An exemption granted but followed by a commencement that was never notified is withdrawn. Councils have no discretion to forgive this, and the appeal routes do not reach the question of whether the outcome is fair.
For self-build there is a second trap after completion. A disqualifying event within three years of completion, such as selling the dwelling or failing to occupy it as your sole or main residence, claws back the levy. You have to notify the authority of a disqualifying event, and failing to notify carries its own surcharge.
The completion evidence for a self-build claim typically includes the building regulations completion certificate, proof of title, council tax records, and one of a specialist self-build warranty, an approved claim under the VAT self-build refund scheme, or a self-build mortgage. Assemble those as you go. Reconstructing them two years later is painful.
Asking the authority to review a surcharge
There is a route, and it is short. The regulations allow you to ask the collecting authority to review the imposition of a surcharge, and then, if the review does not resolve it, to appeal to an appointed person at the Valuation Office Agency. The deadlines are measured in weeks from the date the surcharge was imposed, so the notice goes in a diary the day it arrives.
What a review can fix: an arithmetical error, a surcharge imposed on the wrong person, a notice the authority did in fact receive, a date wrongly recorded. What it cannot fix: a notice that was never served at all. The grounds are narrow and factual.
Appeals on the chargeable amount itself, on apportionment and on the refusal of relief run on separate tracks with their own deadlines, and some of them close within 28 days of the relevant notice. Read the notice you received rather than assuming the deadline you remember.
Keeping an audit trail of service
Everything in this regime turns on what the authority received and when. Build the file as you go.
- Submit each form through a channel that generates a timestamped receipt, and save the receipt as a PDF with the date in the filename.
- Email the collecting authority's CIL inbox directly as well as using any portal, and ask for acknowledgement.
- Keep the liability notice, the exemption decision, the commencement notice and the acknowledgement in one folder with the decision notice.
- Photograph the site on the day before the notified commencement date, and again on the first day of work.
- Diary the completion evidence deadline for a self-build claim, and the three-year disqualifying event period.
- Tell your contractor in writing that no material operations may start before you confirm the notice has been acknowledged.
That last point matters more than it sounds. Most lost exemptions are lost by a groundworker arriving a week early, and the site owner finds out when the demand notice lands. A Planning Statement and the rest of the application pack get careful attention, and then the levy paperwork is treated as administration. It is the part with the money attached.
If you are costing a self-build and want to see which supporting documents the application will need alongside the levy paperwork, browse the report types on PlanScope and start with the ones your site's constraints trigger.
This is general guidance, not legal advice, and the Community Infrastructure Levy Regulations are detailed and frequently amended. Check the position with your collecting authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
What happens if I forget the CIL commencement notice?
The regulations impose a surcharge of 20 per cent of the chargeable amount or £2,500, whichever is lower. If you had been granted an exemption, it is withdrawn and the full levy becomes payable immediately. Collecting authorities have no discretion to waive this, and the review and appeal grounds are narrow and factual rather than about fairness.
When does development count as started for CIL purposes?
It follows the material operations test in the Town and Country Planning Act 1990, which includes digging foundation trenches, laying out an access, demolition and work forming part of the erection of the building. Site clearance alone generally does not count, but removing a hedge and forming a plot access almost certainly does.
Can I claim the self-build exemption after starting work?
No. The exemption has to be claimed and granted before the chargeable development begins, and a commencement notice must then be served. A claim submitted after work has begun cannot be granted. This sequence accounts for most lost self-build exemptions, usually because groundworks started a week earlier than planned.
Do I have to assume liability if I am the landowner?
You should. Where nobody assumes liability the levy falls on the owners of the relevant land interests by default, apportioned between them, and a surcharge applies for the failure. Assuming liability also conditions any exemption claim, so a self-builder cannot obtain the exemption without having submitted the form first.
How do I challenge a CIL surcharge?
Ask the collecting authority to review the imposition first, then appeal to an appointed person at the Valuation Office Agency if the review does not resolve it. Both deadlines run in weeks from the date the surcharge was imposed. The grounds are factual, covering errors of calculation, identity, date or receipt, rather than the merits of the outcome.
What is a disqualifying event for a self-build home?
Broadly, selling the dwelling or failing to occupy it as your sole or main residence within three years of completion. It claws back the levy that the exemption relieved. You have to notify the collecting authority when one occurs, and a failure to notify attracts its own surcharge on top of the levy becoming payable.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.