New Occupancy, Old Fabric: Rebaselining Asbestos Duty After a UK Change of Use

Change of use is often treated as a planning and property issue: a new class, a new occupier, a fresh fit-out. Asbestos sits outside that sequence. The fabric of the building does not change class when the planning authority grants consent, and the duty to manage asbestos remains with whoever has maintenance and control obligations. What does change is the risk profile. A former office with cellular rooms, ceiling tiles and service risers may become a residential conversion with new penetrations, communal areas and a different maintenance regime. In 2026, dutyholders need to treat a change of use as a trigger to re-examine asbestos information, not as an administrative footnote.

Planning consent is not an asbestos survey

Planning permission, permitted development rights and building regulations approval do not confirm that asbestos has been identified, removed or safely managed. They are not substitutes for a management survey, a refurbishment and demolition survey, or an updated asbestos register. Under the Control of Asbestos Regulations 2012, the duty to manage applies to premises used as a workplace and to the common parts of certain residential buildings. A change of use does not suspend that duty while the building is empty, under offer or midway through a fit-out.

The Town and Country Planning (Use Classes) framework is a useful warning system rather than an asbestos control. A move from Class E commercial, business and service use to C3 dwellinghouses, or to a sui generis use such as a large house in multiple occupation, usually brings a different pattern of occupation. Corridors may become communal. Plant rooms may change ownership. Service risers may be opened for new utilities. Retail floor areas may be subdivided. Mixed-use schemes may introduce shared access and separate tenancies within one envelope. Each of those changes can affect where asbestos-containing materials are disturbed, who needs information, and who is competent to act on it.

Where the compliance gap opens

The highest-risk period is often the handover between old and new occupancy. The outgoing occupier may hold a register that was adequate for routine maintenance but not for strip-out. The incoming occupier may appoint contractors from planning drawings before asbestos information has been reviewed. The landlord may retain control of common parts while the tenant controls the demised area. A developer may hold the freehold but appoint a principal contractor for enabling works. If those roles are not mapped, nobody owns the gap.

A second gap appears when the old register is treated as current. A management survey records the condition and location of asbestos at the time of inspection. It may include inaccessible areas, presumed materials and areas that were not inspected. Once layouts change, those limitations matter more. A ceiling void that was previously accessed through a hatch may be sealed. A riser may be extended. An external canopy may become part of a new entrance. The register must be reviewed against the proposed use, not simply reissued with a new date.

Reassess the register against the new use

A competent person should review the existing asbestos survey and register alongside the proposed layout and work programme. The review should ask whether the survey covered the areas that will now be accessed, altered or demolished. It should identify new penetrations, service routes, partitions, roof works and demolition lines. It should check common parts, plant areas, ducts, voids and external structures. It should also record what remains inaccessible and how that uncertainty will be managed.

Where the change of use involves no physical works, the duty to manage still applies. The register and management plan should be updated to reflect the new occupancy, access arrangements and maintenance responsibilities. Where the change involves refurbishment or demolition, the existing management survey is a starting point, not a substitute for intrusive investigation. The dutyholder should presume asbestos-containing materials are present until the evidence shows otherwise, and the plan should say how that presumption will be controlled.

Commission the right survey before intrusive work

A refurbishment and demolition survey is intended to locate asbestos-containing materials as far as reasonably practicable in the areas that will be disturbed. Its scope must match the works, including enabling works, strip-out, service diversions and phased demolition. A survey commissioned only for the new layout may miss areas affected by temporary works or by the removal of existing services. The dutyholder should agree the scope in writing, check the competence and quality assurance arrangements of the surveyor, and require the report to distinguish between surveyed, presumed and inaccessible areas.

If a full survey cannot be completed before work starts, the programme should not simply proceed on hope. The dutyholder should arrange further investigation, isolate the affected area, or plan the work on the basis that asbestos is present. That may mean controlled removal by a competent contractor, with licensed work where the material and task require it. The important point is that the decision is recorded and communicated, not left to the contractor to discover on site.

Close the contractor communication loop

Asbestos information is only useful if it reaches the people who will disturb the fabric. Under the Construction (Design and Management) Regulations 2015, pre-construction information should include relevant asbestos information. Principal designers and principal contractors need to understand the constraints before they plan the work. Trade contractors need the register and survey findings in a form they can use, not a document buried in a handover pack.

The induction should match the trade and the task. A electrician cutting into a ceiling void needs different information from a demolition contractor removing partitions. Permit-to-work arrangements, isolation procedures and emergency protocols should be explained. The site should have clear arrangements for stopping work if unexpected material is found. The dutyholder should also check that the contractor has the correct licence or notified non-licensed work arrangements where applicable, and that waste is consigned and recorded properly.

Practical sequence for dutyholders

• Identify who holds the duty to manage before planning consent is implemented, and record any split between landlord, tenant, developer and managing agent.
• Review the existing survey and register against the proposed use, layout and works programme.
• Commission a refurbishment and demolition survey where intrusive work is planned, with a scope that covers enabling and temporary works.
• Update the register and management plan to reflect new access, occupancy and maintenance arrangements.
• Issue current information to designers and contractors, and verify that it has been understood on site.
• Keep a handover record showing what was known, what was presumed and what was done.

A change of use is not itself a demolition order. It is a warning that old assumptions may no longer hold. The planning system may permit a new class of occupation, but it does not certify the fabric. The dutyholder who closes the gap between consent and occupation is the one who ensures the asbestos file is rechecked, the survey scope is right, and the people doing the work know what they are working around.