The UK Building Safety Act 2022: Leaseholder Protections, Remediation Orders, and the Building Safety Regulator

Introduction

The Building Safety Act 2022 represents the most substantial reform to building safety regulation in decades. Receiving Royal Assent on 28 April 2022, this legislation emerged from the ashes of the Grenfell Tower fire and subsequent national inquiry. The Act creates a fundamentally new regulatory architecture for high-rise residential buildings, introducing the Building Safety Regulator, strict accountability frameworks, and critical protections for leaseholders facing substantial remediation costs.

For leaseholders in higher-risk buildings, the Act offers unprecedented relief. Qualifying leaseholders can no longer be charged for cladding remediation, while non-cladding costs are capped according to property value and spread over ten years. These provisions represent a decisive shift in burden-sharing, moving costs away from residents and towards developers and building owners responsible for safety failures.

As we move through 2026, new milestones emerge. The Building Safety Regulator has now established itself as a standalone non-departmental public body as of 27 January 2026. The Building Safety Levy comes into force on 1 October 2026, introducing a new funding mechanism for remediation work. Key Supreme Court cases clarify leaseholder rights. This guide examines the Act's mechanics and recent developments affecting building owners, residents, and advisers.

Background: From Grenfell to Reform

The Grenfell Tower fire in June 2017 killed 72 people and exposed systematic failures in building regulation, enforcement, and accountability. The tower's cladding—combustible materials chosen partly for cost reasons—had been added during a major refurbishment. Residents had raised safety concerns repeatedly, to little effect. The fire revealed a regulatory system fundamentally unequal to modern buildings' complexity.

Dame Judith Hackitt's independent review, published in 2018, found that building regulation had become fragmented. Local authorities, which enforce building control, operated under resource constraints. The responsibility for managing buildings fell to leaseholders through freeholders and managing agents, yet leaseholders exercised almost no effective control. Remediation costs, where cladding or structural defects were discovered, fell on leaseholders despite their powerlessness to influence construction standards.

The Hackitt Review recommended a "golden thread" of information and accountability flowing from design through to occupation. It proposed a new regulatory regime for higher-risk buildings. The Building Safety Act 2022 implements these core recommendations, though the path to full implementation has extended beyond the original timeline.

Scope: Which Buildings Are Covered

The Building Safety Act applies to "higher-risk buildings," a defined category targeting the largest residential structures. A building qualifies as higher-risk if it meets all three conditions: it reaches at least 11 metres in height (typically seven storeys or more), contains at least 5 storeys, and contains at least 2 residential units.

The definition captures purpose-built flats and converted buildings with sufficient height and density. It does not apply to houses in multiple occupation unless they fall within this height and unit threshold. Purpose-built student accommodation may fall within scope depending on its legal classification and layout.

These height and density thresholds were deliberate. They target buildings where leaseholder numbers and potential cost exposure are greatest, and where the complexity of shared services justifies enhanced regulation. Smaller residential buildings remain subject to standard Building Regulations but not the Building Safety Act regime.

Leaseholder Protections: The Core Relief Provisions

The Building Safety Act's most significant protection for leaseholders came into force on 28 June 2022. This provision states that qualifying leaseholders cannot be charged for cladding remediation costs. Not cladding work generally, but specifically remediation of non-compliant cladding that presents fire safety risks.

A "qualifying leaseholder" is one who owns a flat in a higher-risk building. The leaseholder must have occupied the flat as their main residence at any point since the Act's Royal Assent or the date of discovery of the defect, whichever is later. This definition captures most residential leaseholders in scope buildings, though some time-sensitive questions remain around proof of occupation and the precise date of defect discovery.

For non-cladding remediation costs, the Act imposes a cap based on property value. Leaseholders in properties valued below £325,000 in London or £175,000 elsewhere make no financial contribution. For properties above these thresholds, contributions are capped at £15,000 per year per property and spread over ten years, meaning a maximum ten-year cost of £150,000 per unit.

These caps apply to remediation of fire safety defects discovered in higher-risk buildings occupied after a specified date. They do not automatically reduce retrofit costs already demanded or previously charged. Leaseholders who paid sums before the Act's provisions came into force may have limited recourse. The implementation question of how the Government will enforce cost recovery from developers remains partly outstanding.

To claim protection, a leaseholder does not need to do anything formal. The protection operates as a matter of law. However, in practice, managing agents and freeholders have sometimes sought to charge leaseholders despite the statutory prohibition. Leaseholders who face charges in breach of the Act should seek legal advice promptly.

Remediation Orders and Remediation Contribution Orders

The Act introduces two distinct mechanisms to enforce cost recovery from those responsible for building defects. These are crucial to understanding how the burden is redistributed.

A Remediation Order, under Section 123, directs a person or entity to carry out remediation work. The Building Safety Regulator or the Secretary of State can issue such orders, and they are enforceable through the courts. Remediation Orders identify who must fix the problem and by when. They do not specify who pays, though in practice the entity ordered to remediate bears that cost.

Remediation Contribution Orders, introduced under Section 124, go further. These orders compel developers, builders, freeholders, or other parties to contribute financially to remediation costs. An RCO might, for example, require a developer to fund the cost of recladding a building, rather than that cost falling to leaseholders or public funds. RCOs proved contentious in early implementation, leading to significant litigation.

The Leasehold and Freehold Reform Act 2024 clarified and amended the RCO provisions, addressing concerns about scope and fairness. This Act confirmed that RCOs are a central tool for cost recovery and strengthened their enforceability. However, the mechanics of obtaining an RCO remain complex. There is no automatic trigger; affected leaseholders or responsible authorities must seek them, and the process can take years.

In practice, RCO applications have proven slow. Some remediation programmes have proceeded with public funding or leaseholder contributions while RCO applications remain pending. This timing mismatch represents a key frustration for leaseholders who face immediate cost pressure while long-term cost recovery remains uncertain.

The Building Safety Regulator: Powers and Evolution

The Building Safety Regulator represents a new fourth tier of building safety governance, operating alongside local authority building control, fire authorities, and the Health and Safety Executive. The BSR is established within the Health and Safety Executive framework but operates with significant independence.

From 27 January 2026, the Building Safety Regulator became a standalone non-departmental public body under the Department for Levelling Up, Housing and Communities. This shift to NDPB status signals the Government's recognition that the BSR requires dedicated resources and governance separate from HSE's broader remit. The BSR now publishes its own strategic plans, most recently its Strategic Plan 2026-2027, which outlines its regulatory priorities and enforcement approach.

The BSR's core functions include regulating higher-risk buildings throughout their lifecycle, from design through occupation. It assesses and approves building design, reviews plans for remediation, issues Remediation Orders where appropriate, and supports the development of Building Assessment Certificates. The BSR has enforcement powers, including powers to direct building owners to take action and to prosecute breaches of safety regulations.

The BSR operates a Gateway system. Buildings must pass Gateway assessments at design stage, before construction begins, and at completion before occupation. This phased approval system represents the Act's intent to catch safety issues early, rather than discovering them years after completion when remedial work is vastly more expensive.

In its Strategic Plan 2026-2027, the BSR identifies ongoing priorities: supporting existing remediation programmes, ensuring Gateway assessments proceed efficiently, and developing clear guidance for building owners and accountable persons. The regulator has also identified capacity constraints and ongoing recruitment as challenges.

Accountable Persons and Principal Accountable Persons

The Building Safety Act establishes new accountability structures through the concept of Accountable Persons and Principal Accountable Persons. These terms define who bears legal responsibility for safety compliance in higher-risk buildings.

An Accountable Person is someone with duties under the Fire Safety Act 2021 in a higher-risk building. This typically includes the building's legal owner or freeholder and any party managing common parts. An Accountable Person must comply with fire safety duties and cooperate with the Building Safety Regulator.

A Principal Accountable Person is the primary Accountable Person responsible for overall safety governance. Usually, this is the freeholder or legal owner. The PAP has specific obligations to maintain buildings to required standards, ensure fire safety, keep records, and provide information to the BSR. If a building changes from the design intent during occupation, the PAP must notify the regulator.

These roles are not honorary. PAPs face significant liability if they fail to meet their duties. Directors of companies holding the PAP role can be personally liable in some circumstances. The Act contemplates enforcement action, including monetary penalties and, in serious cases, criminal prosecution.

In practical terms, PAPs must have robust governance structures to manage building safety obligations. They typically engage managing agents or contractors to carry out day-to-day functions, but responsibility remains with the PAP. This has driven significant demand for specialized building safety management expertise.

Building Assessment Certificates and the Occupied Phase

Once a higher-risk building is occupied, the Building Safety Act requires a Building Assessment Certificate. This certificate, issued by an independent assessor, confirms that the building meets the required standards as built. The certificate must be obtained within six months of first occupation.

The Building Assessment Certificate is not a one-off document. The regulations anticipate that certification may need updating if material changes occur or if the building's condition deteriorates significantly. The requirement to maintain an up-to-date certificate creates an ongoing compliance burden for building owners but provides greater transparency to leaseholders and future residents.

Obtaining a Building Assessment Certificate requires comprehensive documentation tracing the building's design, construction, and testing. In practice, many buildings have struggled to gather this "golden thread" of information because construction records were incomplete or poorly organized. This has caused delays in certification and raised tensions between leaseholders seeking confirmation of safety and building owners struggling to assemble evidence.

The Building Safety Levy: Coming October 2026

The Building Safety Levy, due to come into force on 1 October 2026, introduces a new funding mechanism for remediation. This levy applies to work on higher-risk buildings and is intended to fund part of remediation costs that might otherwise fall on leaseholders or the public purse.

The levy operates as a charge on building work in scope buildings. Developers and contractors carrying out remediation will be liable to pay the levy, calculated as a percentage of project costs above a defined threshold. The precise rate and scope continue to be refined in secondary regulations, but the broad intent is to create an industry-wide fund that supports remediation.

Implementation of the Levy has been subject to extended consultation. There is particular concern about whether the Levy will apply to new buildings (potentially discouraging new apartment construction) and how exemptions will work for genuinely urgent safety work. These questions remain under discussion as the October 2026 date approaches.

Key Case Law: Triathlon Homes and Adriatic Land

The building safety reforms have generated significant litigation, much of it centring on leaseholder rights and the enforceability of Remediation Contribution Orders. Two cases in particular have reached the Supreme Court and shape understanding of the Act's scope.

Triathlon Homes Ltd v Walia is a landmark case concerning Remediation Contribution Orders. The case tests whether developers can be compelled to fund remediation of buildings they constructed if defects are discovered years after completion. The Supreme Court has engaged with the case, and while a final judgment is expected, the case has already influenced leaseholder understanding of potential cost recovery mechanisms.

Adriatic Land Ltd also involves RCO provisions and the extent to which prior developers can be pursued for remediation funding. Permission to appeal was granted to both parties in November 2025, indicating that the Supreme Court views the issues as of public importance. These decisions will establish how aggressively the RCO mechanism can be deployed to recover costs from those who created the original defects.

Both cases remain ongoing, but they signal that the courts are willing to engage with complex questions about how remediation costs should be distributed. They also highlight that leaseholders who face substantial costs may have remedies beyond the direct statutory protections, particularly where developers or builders remain identifiable and solvent.

Practical Guidance for Leaseholders

If you are a leaseholder in a higher-risk building, several steps are prudent. First, understand whether your building falls within the Act's scope. Check the building's height and unit count; if it meets the criteria, the Act applies. This affects your rights regarding remediation costs.

Second, if your building has cladding defects, do not assume you must pay for remediation. Qualifying leaseholders cannot be charged, and the burden falls on developers, freeholders, or public authorities. If a managing agent or freeholder demands payment, seek advice immediately. Many leaseholder organizations and solicitors offer free initial guidance on these issues.

Third, maintain records of all communications regarding building defects, remediation proposals, and cost demands. These records are valuable if disputes arise about who should pay or what costs are reasonable. If you are asked to contribute to non-cladding remediation, verify that the £15,000 annual cap is being applied.

Fourth, understand your building's governance. Who is the Principal Accountable Person? Is the building progressing through the Gateway assessments? Has a Building Assessment Certificate been obtained? These questions tell you whether the building is being properly managed under the Act. If you suspect the PAP is not meeting obligations, you can report concerns to the Building Safety Regulator.

Fifth, consider leaseholder engagement and representation. Many buildings have established leaseholder committees or associations. Group involvement can be more effective than individual action in pressing for proper remediation, cost recovery from developers, or rapid Building Assessment Certificate acquisition.

Finally, be aware of timescales. The Act's protections took effect on 28 June 2022, but some procedural questions remain unsettled. The Levy's introduction in October 2026 may create new funding opportunities. The Supreme Court cases will reshape RCO practice. Stay informed as the regulatory regime stabilizes and develops.

Conclusion

The Building Safety Act 2022 fundamentally recasts the relationship between leaseholders, builders, building owners, and regulators. Leaseholders in higher-risk buildings no longer bear the full cost of building defects, and accountability mechanisms now exist to compel developers and builders to contribute to remediation. The creation of the Building Safety Regulator as a dedicated authority signals that building safety is a priority.

However, the Act's promise has proven slower to deliver in practice than many hoped. Remediation Contribution Orders take years to secure. Building Assessment Certificates remain incomplete for many buildings. Leaseholders still face disputes over costs despite the statutory protections. The regulatory architecture is still being refined through case law and secondary legislation.

What is clear is that the era of leaseholders absorbing all building safety costs has ended. Qualifying leaseholders have statutory protection against cladding costs. Non-cladding costs are capped. Remediation Contribution Orders exist as a tool to recover costs from wrongdoers. The Building Safety Regulator now stands ready to regulate buildings throughout their lifecycle. As the regime matures and the Building Safety Levy launches in October 2026, the balance continues to shift.

For leaseholders, building owners, developers, and advisers, understanding the Act is essential. The law is your foundation; the regulator is your backstop; the courts are your remedy if disputes arise. Use these tools confidently and seek professional advice when the stakes are high.