The Building Safety Levy: A New Cost Pressure for Residential Development in England
- 16th July 2026
The UK residential sector is preparing for another significant policy change as the government moves forward with the introduction of the Building Safety Levy , a new charge on developers constructing new homes in England.
Designed to raise revenue for building safety improvements and accelerate remediation of existing higher-risk buildings, the levy represents an additional cost burden that developers will need to factor into future schemes. While the principle of funding safer buildings is widely supported, the timing of the levy introduces fresh challenges for an industry
already navigating viability pressures, regulatory reform, and ambitious national housing delivery targets.
What is the Building Safety Levy?
The Building Safety Levy is a mandatory charge that will apply to most new residential developments in England requiring building control approval. Its purpose is to generate funds to support the government’s wider building safety programme, particularly the remediation of existing buildings affected by historic fire safety defects.
Although introduced under the framework of the UK Government’s wider reforms following the Building Safety Act 2022, detailed implementation guidance remained limited for several years. Many in the industry had speculated that the levy may be delayed or deprioritised as the government sought to meet its manifesto target of delivering 1.5 million homes by 2029.
However, on 24 March 2025, the government confirmed in its Technical Consultation Response that the levy remains firmly on the agenda and is scheduled to come into force in Autumn 2026.
Which developments will be affected?
The Building Safety Levy will apply to all new residential developments in England that require building control approval, including mixed-use schemes containing residential accommodation.
This is expected to include everything residential including, New-build private residential developments, Mixed-use developments with residential elements, Purpose-built student accommodation, Residential conversions or change-of-use schemes and Retirement housing developments.
The breadth of the levy means it will impact a wide range of developers, from major housebuilders to specialist residential and mixed-use operators.
Are there any exemptions to the Levy?
The exemptions are relatively limited and targeted at smaller-scale developments and socially beneficial uses.
Current exclusions include:
- Developments of 10 units or fewer
- Purpose-built student accommodation with fewer than 30 bedspaces
- Affordable rented and intermediate housing for eligible households
- Non-social housing delivered by not-for-profit organisations
- Community facilities such as NHS hospitals, care homes, and supported housing
While these exclusions provide relief for certain sectors, most mainstream residential developers will remain within scope.
How will the Levy be calculated?
The charge payable under the Building Safety Levy will be based on the total floorspace of the development.
Upon commencement of works, developers will be required to submit project information to the relevant local authority. The local authority will then calculate the levy due within five weeks.
A key feature of the policy is that rates will vary geographically.
Rather than applying a flat national charge, levy rates per square metre will be set by local authority area to reflect differences in house prices. This means:
- Higher-value locations will attract higher levy rates
- Lower-value areas will attract lower charges
This geographic variation introduces an additional layer of complexity for appraisals, particularly for developers operating across multiple regions.
Brownfield Incentives
To support regeneration and encourage redevelopment of previously used sites, the government has confirmed that a 50% discount will apply to qualifying brownfield land.
This discount will apply where at least 75% of the land within the planning permission redline boundary is classified as previously developed land.
For urban developers and regeneration-led schemes, this may provide some relief against rising development costs. However, careful due diligence will be required to confirm eligibility, particularly on mixed-character sites.
The Cost Implications for Developers
The Building Safety Levy adds another mandatory cost to residential development at a time when many projects are already under pressure from Build cost inflation, Higher financing costs, Additional fire safety requirements, Sustainability obligations and major planning delays in areas across the UK.
Unlike many variable project costs, the levy is non-negotiable and must be treated as part of the core development appraisal.
From a quantity surveying and viability perspective, the Building Safety Levy will need to be considered alongside other statutory charges at the earliest stage of land acquisition and feasibility modelling.
A challenge for housing developers
The reintroduction of clarity around the Building Safety Levy has reignited debate over how the government intends to reconcile additional development costs with its housing delivery ambitions.
The target of 1.5 million new homes by 2029 equates to approximately 1,000 homes being delivered every working day. Achieving this at scale will require strong development pipelines, investment confidence, and commercially viable schemes.
Additional levies risk affecting; Land values, Site acquisition strategies, Scheme viability and Developer appetite in lower-margin regions.
For some marginal schemes, the cumulative impact of the Building Safety Levy alongside other regulatory costs may delay or reduce delivery unless offset through land pricing adjustments or policy incentives
Why Early Cost Planning Matters?
As with many recent regulatory changes, the Building Safety Levy reinforces the importance of early-stage cost advice.
Developers assessing future opportunities should now begin incorporating the Building Safety Levy into:
- Site appraisals
- Residual land valuations
- Feasibility studies
- Funding models
- Planning strategy
Location-specific cost benchmarking will become increasingly important, particularly given the regional variation in levy rates.
Working examples, such as those prepared by Quantem, can help developers understand the likely cost impact of the levy across different locations and development typologies, allowing better-informed decisions at land acquisition stage
The Building Safety Levy is the latest in a series of structural changes reshaping residential development in England.
While the levy supports the important objective of funding safer buildings and accelerating remediation, it also introduces another significant cost that developers must factor into project viability.
As Autumn 2026 approaches, early planning and robust financial modelling will be essential. At Quantem, we help developers understand the full impact of emerging legislation on scheme viability, providing expert cost consultancy, development appraisal, and strategic advice to support informed decision-making. By identifying risks early and optimising project costs, we help clients navigate regulatory change with confidence while protecting the commercial viability of their developments.
