BDW v URS Simplified: The Case Every Property Professional Should Understand

Why This Case Matters

In May 2025, the Supreme Court handed down a major judgment in BDW v URS, now regarded as one of the most important construction cases in recent years. The central issue was this: can a developer recover the cost of fixing dangerous building defects, even after the building has been sold, and even if no one is legally demanding they do so?

The Court’s answer was yes, and the implications are wide-ranging.

The decision affects how building safety issues are managed, and where ultimate responsibility lies when serious defects come to light. It also confirms that the Building Safety Act 2022 and Defective Premises Act 1972 now carry real legal weight and practical consequences.

This article explains what happened, what was decided, and what it means in straightforward terms.

Case Summary

BDW Trading Ltd (part of Barratt Developments) was the original developer behind two residential schemes in London and Leicester. It had appointed URS Corporation Ltd, a structural engineering consultancy, to design the buildings.

Years later, after the buildings had been sold, BDW discovered serious structural issues. One block had such significant slab defects that it had to be evacuated. Further investigations revealed similar risks in other buildings. Although BDW no longer owned any of them and wasn’t facing legal claims from leaseholders, it decided to carry out extensive remedial works on safety grounds.

Once the works were done, BDW tried to recover those costs from URS by bringing a claim in negligence. URS argued that BDW had acted voluntarily and that no legal duty had been breached. The case eventually reached the Supreme Court, raising important questions about liability, limitation, and building safety.

The Questions That Changed Construction Liability

When BDW brought its claim against URS, it was more than a dispute over who should pay for repair works. The case raised four key legal questions that give guidance on how responsibility for defective buildings is shared under current law.

Here’s what the Supreme Court had to decide:

• Were BDW’s costs truly recoverable, or were they “voluntarily” incurred?
  BDW had already sold the buildings and wasn’t under any formal legal pressure to act. URS argued that this meant the repairs were a voluntary choice, and therefore not recoverable.
• Did the Building Safety Act 2022 (BSA) apply retrospectively?
  The BSA extended the limitation period for claims under the Defective Premises Act from six to thirty years. The court had to decide whether this also applied to claims that had already been time-barred, including secondary claims made by developers.
• Can a developer bring a claim under the Defective Premises Act (DPA)?
  The DPA is often viewed as a consumer protection law, but the question here was whether a developer, who had commissioned the work, could also rely on it to bring a claim against consultants or contractors.
• Can a contribution claim be made even if the developer hasn’t been sued?
  BDW had not been sued or forced to settle with anyone. It acted on its own. The question was whether that still gave it the right to seek a contribution from URS under the Civil Liability (Contribution) Act.

The Supreme Court’s judgment has now set out clear answers that affect how building safety disputes are approached going forward.

The Decision

The Supreme Court dismissed URS’s appeal on all four grounds. Its reasoning has major implications for how building defects are dealt with across the industry.

• Recovering “voluntary” costs
  The Court rejected the idea that BDW’s losses were unrecoverable simply because no one had forced them to act. It confirmed that costs can still be claimed in negligence if the decision to carry out remedial work was reasonable. In this case, the defects posed safety risks to residents, and BDW’s actions were seen as necessary. The Court also noted that factors like reputational risk and public safety concerns could help justify such action. The key point was that BDW had no realistic alternative.
• Retrospective effect of the Building Safety Act
  The Court confirmed that section 135 of the Building Safety Act applies retrospectively. This means the extended thirty-year limitation period under the Defective Premises Act also applies to onward claims, such as those in negligence or for contribution. Developers can now rely on this longer timeframe even where the original claim was already time-barred under the previous law.
• Duties owed to developers under the Defective Premises Act
  URS had argued that the DPA was only meant to protect homeowners. The Court disagreed. It found that a duty is also owed to developers who ordered the construction of a dwelling, even if they do not occupy it. This gives developers another route to claim against consultants or contractors for defective work.
• Contribution claims without being sued first
  The Court ruled that BDW was entitled to claim a contribution from URS even though it had not been sued or entered into a settlement. It was enough that BDW had incurred costs in rectifying damage caused by a party who also bore legal responsibility. In other words, developers who carry out remedial work can claim a fair share of the cost from others who were also at fault, even without a court order or formal claim being made against them.

Why This Judgment Matters for the Property Industry

The BDW v URS decision has reshaped the legal landscape for anyone involved in the development, design, or remediation of residential buildings. It goes far beyond the parties involved and sends a clear signal about how the courts expect the industry to respond to building safety issues.

For developers, it provides reassurance. If you act responsibly to fix defects, even before a claim is made or without being legally required to do so, the law will generally support recovery of those costs from those who caused the problem. The Court acknowledged that developers often feel real pressure to act in the public interest, protect their reputation, and avoid wider risk. Those factors are now recognised as valid reasons to justify taking action.

The judgment also confirms that developers are not just liable under the Defective Premises Act, but they are also protected by it. Contractors, engineers, and consultants can now be held accountable under the Act for poor design or workmanship, even decades later, with claims brought by developers rather than just individual buyers.

Perhaps most importantly, this case removes a key argument often used: that claims can be dismissed because the developer wasn’t directly sued, or because limitation had already expired, will no longer work. That significantly increases exposure for design professionals, contractors, and their insurers.

For investors, funders, and asset managers, the message is also clear. The law now gives developers more support in recovering repair costs. This creates more certainty in allocating risk and may influence how developments are structured and contracts are negotiated.

Summary – What You Need to Know

BDW v URS confirms that courts will take a practical and fair approach when it comes to who pays for putting serious building defects right. If a developer acts reasonably to fix dangerous issues, even without being legally forced to, they are likely to be able to recover those costs. Acting early is no longer a legal disadvantage.

The judgment also confirms that the Building Safety Act and the Defective Premises Act now carry real weight. Time limits for claims have been extended. Developers can bring claims under the DPA even if they are not the eventual owners or occupiers. Additionally, contribution claims can succeed even if the developer hasn’t been sued or settled anything formally.

In short, the law now gives developers and building owners more options, more time, and more legal protection when dealing with unsafe construction work.