Building Safety Levy from 1 October 2026: what developers and project teams need to know

What is the Building Safety Levy?

The Building Safety Levy is a charge on certain new residential development in England. Local authorities act as collecting authorities and the revenue is intended to contribute to the cost of remediating building-safety defects.

The regime is set out principally in the Building Safety Levy (England) Regulations 2025, with amendments made by the Building Safety Levy (Amendment) (England) Regulations 2026. The levy comes into operation on 1 October 2026.

Which developments are caught?

A chargeable development has to satisfy the statutory charging conditions. In broad terms, the works must:

1. constitute, or form part of, a major residential development;
2. create new residential floorspace; and
3. have a client who is not an exempt person.

For levy purposes, a major residential development generally means development providing at least 10 new dwellings or at least 30 new bedspaces in purpose-built student accommodation (PBSA).

Importantly, the threshold is not simply tested against the number of units in one building-control application. If the building-control application forms part of a planning permission for a major residential development, the levy can still apply. Splitting the building-control submissions into smaller packages does not necessarily avoid the charge.

Who is responsible for paying?

The person identified as the client for the relevant application or initial notice is responsible for paying the levy where it is due. That identity is determined through the building-control regime.

The statutory liability and the contractual allocation of cost are not necessarily the same thing. Development agreements, building contracts and professional appointments should therefore be checked to see who ultimately bears the financial consequence and who is responsible for supplying levy information.

What about applications already submitted?

The implementation date creates an important dividing line.

• The levy does not apply to existing applications for dwellings or PBSA submitted before 1 October 2026.
• Later variations to those existing applications do not, by themselves, bring the original application into the levy regime.
• If an application submitted before 1 October 2026 is rejected and then resubmitted on or after that date, the resubmitted application can be liable.

That makes the building-control record commercially important. Teams should retain clear evidence of when the application or notice was submitted and its status.

Are there exemptions?

Yes. The Regulations contain exemptions and exclusions, including provisions for social housing, supported housing and a range of specified residential uses. A non-profit registered provider of social housing, or a wholly owned subsidiary meeting the statutory test, can also be an exempt person.

The detailed exemption provisions matter because some applications still have to provide levy information even where some or all of the resulting accommodation will not attract a charge.

How is the levy calculated?

The levy is calculated by reference to chargeable residential floorspace and the applicable local-authority rate. Rates vary by location, and the Regulations also make provision affecting previously developed land.

For budgeting purposes, the key point is that this is a project cost that should be identified early. It should not first appear as an administrative issue at completion.

Why completion planning matters

The levy is linked directly to the completion process. Government guidance states that the whole levy charge for an application must be paid before a completion certificate can be issued for the works covered by that application.

Where a registered building control approver is involved, an unpaid levy can also lead to rejection of the final certificate. Similar controls apply to completion certificates for higher-risk building work.

This creates a practical programme risk: a levy issue that is left unresolved can affect handover, occupation and the building-control completion route even if the physical works are otherwise ready.

What should developers and project teams do now?

1. Screen all applications from 1 October 2026. Identify developments of 10 or more new dwellings, 30 or more PBSA bedspaces, and smaller building-control packages forming part of a larger major residential development.
2. Confirm the client. Make sure the person named in the building-control application is understood internally and contractually.
3. Model the levy early. Use the applicable local-authority rate and the project’s chargeable floorspace rather than carrying an undefined contingency.
4. Check exemptions properly. Keep the evidence needed to support any exemption or reduced charge.
5. Preserve pre-1 October application records. If the project relies on an application submitted before commencement of the levy, keep clear evidence of submission and acceptance status.
6. Review contracts. Check who carries the levy cost, who must provide information, and whether a change in levy liability can become a variation or compensation event under the relevant contractual machinery.
7. Do not leave payment to completion. Track levy liability notices and payment certificates alongside the wider building-control close-out documents.

Contract drafting and dispute risk

There is a distinction between the statutory party responsible for the levy and the party who may ultimately bear the cost under the project contracts. If the documents are silent or inconsistent, disputes can arise over whether the levy is included in the contract sum, whether later changes are recoverable, and who bears delay if payment or information prevents completion certification.

For schemes starting under the new regime, those questions are better addressed at contract stage than at handover.