Renovating any building raises the insurance questions covered on our single project and renovation insurance page: who insures the existing structure, what happens to your current policy when works begin, and how the works themselves are covered. When the building is listed, every one of those questions gets harder, and two new ones appear. This article covers what actually changes.

Rebuild cost is not market value, and for listed buildings the gap is wider

All buildings insurance should be based on reinstatement cost, what it would cost to rebuild, rather than market value. For a listed building the two figures can diverge dramatically, in either direction, because reinstatement of a listed building does not mean rebuilding something similar. It means matching materials, lime plasters and mortars rather than modern equivalents, joinery made rather than bought, heritage trades that are scarce and priced accordingly, and conservation officers involved in the detail. A listed building insured against an estimate produced for an ordinary house of the same size is underinsured before anything else goes wrong, and underinsurance does not just cap a total loss: through the average condition, it reduces every claim in proportion. Before works start is exactly the right moment to have the reinstatement cost professionally assessed, because the project has already put the building’s value under the microscope. One further point on the existing structure during the works: many renovation policies insure the existing structure on an indemnity basis, meaning the insurer pays the cost of reinstating with materials of a similar age and condition rather than as new. That basis, and the sum insured it implies, should be understood before the policy starts.

Consents, delays and the cessation of works

Works that affect the character of a listed building need listed building consent, and carrying out such works without it can be a criminal offence as well as something an authority can require to be undone. The insurance consequence that matters most in practice is delay. Listed building projects stall more often than others: a conservation officer asks for a different approach once opening-up reveals what is really there, a further consent is needed for a variation, or a planning question has to be resolved before the next stage can start. Renovation policies are written on the basis that the works are ongoing, and most provide that if the works cease for longer than a set period, commonly sixty days, the renovation cover ends and the property must be insured as an unoccupied building until the works resume. A pause for consent can therefore quietly take a project outside its policy. The safeguard is to tell the insurer as soon as a stoppage looks likely, before the period runs out, so that the cover can be continued or adjusted rather than lapsing. Alongside this, cover arranged for one set of consented works should be revisited when the scope changes, so that the policy follows the project rather than the original drawings.

During the works, the standard problems get sharper

Everything our renovation insurance page says about existing structures applies with more force here. The existing structure is more valuable and harder to reinstate, so the joint names question matters more. Heat work, the traditional enemy of old buildings, from paint stripping to plumbing, requires explicit discussion with the insurer in order for hot works cover to be provided, and will be subject to a range of hot work conditions from the insurer. If the building stands empty during the works, that needs declaring and covering. And where the project involves structural intervention close to neighbouring property, non-negligent liability cover is a highly recommended cover. None of these is unique to listed buildings; all of them are less forgiving when the building cannot simply be rebuilt in blockwork.

After practical completion

When the works finish, the project policy hands over to a permanent arrangement. The renovated building has a new reinstatement cost, reflecting everything just spent and the standards it was spent to; the permanent policy should start from that figure. Specialist and high-value household insurers handle listed properties as a matter of routine and their wordings tend to fit better than standard products. Our article on property owners insurance for listed buildings covers the permanent arrangement in more detail, and our team arranges both the project cover and the policy that follows it, so nothing is lost in the handover.