Building Safety Levy 2026: What Developers Need to Know Before 1 October

The introduction of the Building Safety Levy 2026 marks one of the most significant regulatory changes affecting residential development in England since the Building Safety Act. From 1 October 2026, many developers constructing new homes or purpose-built student accommodation will face an additional statutory levy that must be paid before building control completion can be achieved.

Although the levy has a straightforward objective, its financial and operational implications are far reaching. For developers, investors, landowners and project teams, the levy introduces another cost that must be considered alongside planning obligations, Community Infrastructure Levy (CIL), Section 106 agreements and wider construction costs.

The key message is simple. If your development pipeline includes residential schemes that are likely to require Building Regulations approval after 1 October 2026, you should begin planning now.

What is the Building Safety Levy 2026?

The Building Safety Levy 2026 is a new charge on certain residential developments in England. The Government has introduced the levy to help fund the remediation of historic building safety defects, ensuring that the costs of making buildings safer do not fall solely on leaseholders or taxpayers.

Unlike planning contributions, the Building Safety Levy is linked to the Building Regulations process rather than the planning process. This distinction is important because the levy becomes relevant when developers submit building control applications and provide commencement information, rather than when planning permission is granted.

The Regulations come into force on 1 October 2026 and apply only to building control applications made on or after that date. Applications submitted before commencement are generally outside the scope of the levy, provided they are not replaced by new applications after implementation.

Why has the levy been introduced?

Following the Grenfell Tower tragedy, the Government committed to improving building safety across England while ensuring that the construction industry contributes towards the cost of remediating unsafe residential buildings.

The Building Safety Levy forms part of a wider programme of reforms introduced through the Building Safety Act 2022. Together with the Residential Property Developer Tax and strengthened building control requirements, the levy represents another step towards embedding accountability within the residential development sector.

For developers, the policy objective may be clear, but the commercial implications cannot be ignored. The levy adds another project cost that must be incorporated into financial appraisals from the earliest stages of development.

Which developments are affected?

The Building Safety Levy does not apply to every residential project.

Broadly speaking, the levy applies where building work creates:

New residential dwellings.
New purpose-built student accommodation (PBSA).
Additional residential floorspace through extensions or changes of use.

However, the development must also qualify as a major residential development.

Under the Regulations, this generally means:

10 or more new dwellings; or
30 or more new PBSA bedspaces.

Smaller residential developments remain outside the scope of the levy.

Developers converting offices, commercial buildings or other existing properties into residential accommodation should not assume they are exempt. Where conversions create new residential floorspace and satisfy the major development threshold, they may attract the levy.

How is the Building Safety Levy calculated?

Unlike many national charges, the Building Safety Levy is not a fixed rate across England.

Instead, each local authority has its own applicable area rate, with charges based on local housing values. The levy is calculated according to the amount of chargeable residential floorspace created within each building.

This means two identical apartment schemes could generate significantly different levy liabilities simply because they are located in different local authority areas.

For organisations delivering projects across multiple regions, this variation makes early financial modelling essential.

Developers should not treat the levy as a simple contingency allowance. Instead, project teams should calculate likely liabilities during feasibility and update appraisals as designs develop.

Brownfield developments benefit from a reduced rate

One of the most important features of the Building Safety Levy 2026 is the discounted rate available for previously developed land.

Where at least 75% of a development site qualifies as previously developed land, the levy rate is reduced by 50%. This recognises that brownfield regeneration often carries higher development costs than greenfield schemes.

This reduction could represent a substantial saving on larger developments.

However, eligibility depends on the planning boundary rather than simply where individual buildings are located. Developers should therefore assess site history carefully and retain evidence supporting any claim for the discounted rate.

Exemptions from the Building Safety Levy

The Regulations also provide several important exemptions.

Among the most significant are:

Social housing.
Supported housing.
Developments promoted by qualifying non-profit registered providers of social housing.
Smaller residential developments below the charging threshold.

Understanding these exemptions early can materially influence project viability and delivery strategy.

The levy process

One area that many developers underestimate is how closely the levy is integrated with the Building Regulations process.

Developers must provide levy information when submitting building control applications relating to qualifying residential developments. Additional information and supporting evidence must then accompany the first commencement notice.

The collecting authority uses this information to determine whether the levy applies and, if so, calculate the amount payable.

Once assessed, the authority issues either:

a Levy Liability Notice; or
a Notice of No Charge.

The levy must then be paid before a completion certificate or final certificate can be issued. Failure to settle the levy can delay practical completion even where construction work has finished successfully.

Why developers should act now

Many organisations are understandably focusing on the implementation date of 1 October 2026.

In reality, the critical period begins much earlier.

Experience shows that major regulatory deadlines often create a surge in submissions immediately beforehand. Local authority building control teams, Registered Building Control Approvers and the Building Safety Regulator are all likely to experience increased workloads as developers seek to avoid the new levy.

Submitting an incomplete application shortly before the deadline may achieve very little if additional information is requested or the application is rejected because mandatory levy information is missing. The guidance makes clear that applications lacking the required levy information may be rejected.

The better strategy is to identify qualifying schemes now, complete outstanding technical work and prepare robust building control submissions well in advance.

Common risks for developers

Although the Regulations are detailed, most delivery risks arise from project management rather than legislation.

Common issues include:

assuming every residential scheme attracts the levy
overlooking exemptions
failing to identify brownfield discounts
inaccurate floorspace calculations
incomplete Building Regulations submissions
leaving submissions until late summer 2026
failing to account for levy costs within development appraisals
misunderstanding when payment becomes due

Each of these risks can affect programme, cash flow or project viability.

How Anstey Horne can help

Preparing for the Building Safety Levy 2026 involves far more than understanding the Regulations.

Successful delivery depends on integrating levy requirements into project planning, design development, cost management and Building Regulations compliance from the outset.

Anstey Horne works with developers, investors, landowners and public sector organisations throughout the development lifecycle. Our multidisciplinary teams understand how regulatory changes influence programme delivery, development viability and building control strategy.

Whether you are assessing a development pipeline, preparing Building Regulations submissions or reviewing project viability, obtaining specialist advice early can reduce delays and provide greater certainty before implementation.

Frequently Asked Questions

When does the Building Safety Levy 2026 come into force?

The Building Safety Levy comes into force on 1 October 2026 and generally applies to qualifying building control applications submitted from that date.

Does every residential development have to pay the levy?

No. The levy generally applies only to major residential developments meeting the charging conditions set out in the Regulations.

What is considered a major residential development?

Typically, developments creating 10 or more dwellings or 30 or more PBSA bedspaces.

Is affordable housing exempt?

Certain categories of social housing and supported housing are exempt from the levy.

Does the levy apply to office-to-residential conversions?

It can. Where a conversion creates qualifying residential floorspace and satisfies the charging conditions, the levy may apply.

How is the levy calculated?

The levy is calculated using chargeable residential floorspace multiplied by the applicable local authority rate.

Are brownfield developments charged less?

Yes. Qualifying previously developed land benefits from a 50% discounted levy rate where the relevant criteria are met.

When must the levy be paid?

Payment must be made before completion certification and occupation deadlines specified within the Regulations.

Can the levy amount change during the project?

Yes. Where applications are amended or development proposals change, the collecting authority may recalculate the levy and issue a revised liability notice.

What should developers do now?

Review your development pipeline, identify schemes likely to fall within scope, assess eligibility for exemptions or discounted rates, update viability appraisals and prepare Building Regulations submissions well ahead of the October 2026 implementation date.

The Building Safety Levy 2026 should not be viewed simply as another compliance exercise. It is a material cost that has the potential to affect development viability, programme certainty and project delivery across England. Organisations that understand the requirements early, incorporate the levy into project planning and submit robust applications ahead of the implementation date will be better placed to avoid unnecessary delays and protect development value.

Contact

Need advice on how the Building Safety Levy 2026 could affect your development?

Anstey Horne's Cost Consultancy team helps developers, investors and public sector clients understand the financial implications of new regulatory requirements from the earliest stages of a project. We can assess potential levy liabilities, review eligibility for exemptions and discounted rates, support development viability assessments and help you factor the levy into project budgets and procurement strategies.

Contact our experts to discuss your scheme and ensure your projects are prepared for the introduction of the Building Safety Levy. To arrange a no-obligation consultation – please call 020 4534 3130.

If you rather we called you, or for further information please fill in our contact form and we will be in touch.

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