Defective Premises Act 1972: Landlord's Guide

The Defective Premises Act 1972 imposes statutory duties on those who construct or alter buildings, and on landlords in respect of let property. Section 1 requires builders to work in a professional manner with proper materials so the dwelling is fit for human habitation. Section 4 imposes a duty of care on landlords to all persons who might reasonably be affected by defects — not just tenants but household members, visitors, and members of the public. The Building Safety Act 2022 extended limitation periods to 15 years (prospective) and 30 years (retrospective). This page covers both sections in detail, the breadth of the section 4 duty, the standard of care, the categories of recoverable damages, and the practical compliance approach.

What the Act does

The Defective Premises Act 1972 imposes statutory duties on those who undertake work in connection with the construction or alteration of buildings, and on landlords in respect of premises let on tenancies. The Act fills gaps that existed in the common law on landlord and builder liability — gaps that the courts had repeatedly criticised but which only legislation could properly close. Despite being over 50 years old, the Act remains one of the most important sources of landlord liability for personal injury and property damage caused by defects.

Two sections do most of the practical work. Section 1 imposes a duty on those building dwellings to do the work in a workmanlike manner, with proper materials, so that the dwelling will be fit for human habitation when completed. Section 4 imposes a duty of care on landlords in respect of defects in let property — the landlord owes a duty to all persons who might reasonably be affected by the defect, not just the tenant. Both sections have been amended over time, and the Building Safety Act 2022 substantially extended the limitation period for claims under section 1.

The Act's practical effect is that landlords face personal injury and property damage exposure beyond what would otherwise apply under contract law. A tenant injured by a defective handrail can sue the landlord. A child of a tenant injured by a falling roof tile can sue the landlord. A visitor to the property who slips on damp stairs can sue the landlord. The Act's duty is owed to "every person who might reasonably be expected to be affected" — not just to those who have a contractual relationship with the landlord.

Section 1 — duty of those building dwellings

Section 1 of the Act imposes a duty on every person who takes on work for or in connection with the provision of a dwelling. The duty is to:

• Do the work in a workmanlike or professional manner.
• Use proper materials.
• Ensure that the dwelling is fit for human habitation when completed.

"Provision of a dwelling" includes both new construction and conversion of existing buildings into dwellings. The duty applies to:

• Builders and main contractors.
• Sub-contractors carrying out specific elements of the work.
• Architects and surveyors involved in design.
• Developers and others who arrange for the work to be done.

The duty is owed to "every person to whose order the dwelling is provided" — the original purchaser or commissioner — and to "every person who acquires an interest, whether legal or equitable, in the dwelling". This means the duty extends to subsequent purchasers, leaseholders, and tenants.

Limitation periods

Until the Building Safety Act 2022, the limitation period for section 1 claims was the standard 6 years from the cause of action accruing — typically the completion of the works. This meant claims were often statute-barred before defects became apparent, particularly for hidden defects like fire-stopping or cladding issues.

Section 135 of the Building Safety Act 2022 substantially extended the limitation:

• Prospective claims (cause of action arising after 28 June 2022): up to 15 years from completion.
• Retrospective claims (cause of action arising before 28 June 2022): up to 30 years from completion, where the claim would otherwise have been statute-barred.

The retrospective extension was specifically designed to allow claims relating to defects in buildings constructed during the 1990s and 2000s — particularly cladding and fire safety defects exposed by the post-Grenfell investigations. Substantial litigation has followed and continues.

Section 4 — landlord's duty of care

Section 4 is the most directly relevant section for residential landlords. It imposes a duty of care on every landlord whose premises are let on a tenancy, where the landlord has an obligation (express or implied) to maintain or repair the premises.

The duty is to take "such care as is reasonable in all the circumstances to see that all persons who might reasonably be expected to be affected by defects in the state of the premises are reasonably safe from personal injury or from damage to their property."

Who is owed the duty

The duty is owed not just to the tenant but to "all persons who might reasonably be expected to be affected by defects". This includes:

• The tenant.
• Members of the tenant's household, including children.
• Visitors to the property — friends, family, tradespeople, delivery drivers.
• Members of the public passing by where defects could affect them — pedestrians on the pavement next to a defective wall, neighbours where defects could affect their adjoining property.
• Subsequent occupiers if defects persist when the property changes hands.

The breadth of this category is one of the Act's most important features. A landlord who has no contract with a particular individual still owes them a duty of care under section 4 if they could reasonably be affected by defects in the property.

When the duty arises

The duty arises when the landlord knows of the defect, or ought reasonably to have known of it. Constructive knowledge — what the landlord ought to have known — is a substantial part of the test. A landlord who has not inspected the property for years cannot rely on "I didn't know" to escape liability for defects that reasonable inspection would have revealed.

Knowledge can come from:

• Direct notification by the tenant or another occupier.
• Periodic inspections (the landlord's own visits to the property).
• Reports from contractors, surveyors, or other professionals.
• External warning signs visible without entering the property.
• Local authority enforcement notices or improvement requirements.

What counts as a defect

A "defect" includes any condition of the premises that makes them dangerous. Common defect categories that have founded successful section 4 claims:

• Structural defects — falling tiles, collapsed ceilings, defective walls, broken windows.
• Trip and slip hazards — loose carpet, uneven steps, defective handrails, wet floors caused by leaks.
• Electrical hazards — defective wiring, missing earth bonding, broken sockets.
• Gas hazards — leaking pipes, faulty boilers, blocked flues (also covered by Gas Safety Regulations).
• Damp and mould causing health effects, particularly to children and vulnerable occupiers.
• Fire safety defects — defective fire doors, inadequate alarms, blocked escape routes.
• External hazards — defective garden walls, broken gates, unsafe paths.

Standard of care

The standard is "such care as is reasonable in all the circumstances". This is not a strict liability standard — the landlord is not automatically liable for any defect — but it is a meaningful duty. The court considers:

• The nature and severity of the defect.
• The risk it posed to the persons affected.
• The cost and difficulty of remediation.
• The time available between knowledge of the defect and the incident.
• Any steps the landlord took to address the issue.
• Whether reasonable inspection would have identified the defect earlier.

A landlord who acted promptly on notification, took reasonable steps to remediate, and could not have prevented the incident through reasonable diligence will typically not be liable. A landlord who delayed action, ignored warnings, or failed to inspect periodically will typically be liable.

Damages

Section 4 claims seek damages for:

• Personal injury — pain, suffering, loss of amenity, loss of earnings, medical costs. Awards range from a few thousand pounds for minor injuries to substantial six-figure sums for serious life-changing injuries or fatalities.
• Property damage — damage to the claimant's belongings caused by the defect. Typically modest in residential contexts but can be substantial where electrical fires destroy contents.
• Consequential losses — costs flowing from the injury or damage, such as alternative accommodation while repairs are carried out.

Insurance is essential. Specialist landlord insurance includes public liability cover that responds to section 4 claims. Public liability cover of at least £2 million is standard; £5-10 million is increasingly recommended. See our landlord insurance guide.

Practical compliance

A landlord who wants to manage section 4 exposure should:

1. Inspect periodically. Six-monthly inspections of every property — internal and external. Document with written reports and photographs. Identify and address any defects observed.

2. Respond promptly to tenant reports. The duty arises on knowledge. Once notified, time begins to run. Acknowledge the report immediately, investigate within days, and remediate within a reasonable timescale.

3. Document everything. Inspection records, repair invoices, contractor reports, communications with tenants. The records are the defence to any later claim.

4. Address external hazards. Garden walls, gates, paths — defects affecting passers-by are particularly easily missed but produce substantial liability. Include external areas in every inspection.

5. Maintain insurance. Public liability cover of at least £2 million, with higher limits for higher-value properties or HMO operations.

Authoritative sources

• Defective Premises Act 1972
• Building Safety Act 2022, s.135 — extension of limitation periods
• Our Landlord and Tenant Act 1985 guide — for the parallel section 11 repairing obligations.
• Our landlord insurance guide.