Major renovation work can change the risk profile of a home long before the finished extension, loft conversion or remodel adds value. Walls may be opened, security weakened and the property left empty for weeks. Renovation insurance in the UK is therefore less about buying one standard product and more about checking where your normal home policy ends and what extra cover is needed while work is underway.
The safest starting point is to speak to your home insurer before major work begins. The Association of British Insurers advises homeowners to tell their insurer about significant building work, extensions, major refurbishment and long periods when the home will be empty. Your insurer may continue cover, change the terms or tell you that specialist renovation cover is required.
Tell your insurer before structural work starts
Do not assume a standard buildings policy automatically covers a major project. Structural renovation is very different from cosmetic decorating. Structural work can increase the risk of water ingress, fire, accidental damage, theft and damage to neighbouring property.
Describe the project accurately. Give the dates, contract value, structural scope, occupancy plans and contractor details. If the scope changes materially, update the insurer.
Also check whether the completed project will increase the rebuilding cost. Buildings insurance renovation arrangements should reflect the cost of rebuilding the finished home, not its market value. A large extension or major specification upgrade can make an old sum insured outdated.
Check what happens if the home becomes unoccupied
Renovation can create an insurance issue even when tradespeople visit every day. The Financial Ombudsman Service notes that disputes often involve homes being refurbished that are visited regularly but are not actually habitable.
Many home policies restrict certain cover after a property has been unoccupied for a stated period, commonly 30 or 60 days depending on the policy. Restrictions can affect claims for theft, malicious damage or escape of water. There is no single UK-wide number that applies to every insurer, so check your own policy wording.
If you will move out during the works, ask exactly how your insurer defines “unoccupied” and whether occasional overnight stays or site visits make any difference. If the standard policy cannot accommodate the situation, specialist unoccupied home insurance or renovation-specific cover may be needed.
Separate the existing house from the building works
A builder having insurance does not automatically mean your house, new works and materials are all protected. Your existing policy may cover the original structure but restrict damage connected with major works. A contractor’s policy may focus on its own liabilities, tools or contract works rather than every loss affecting your home.
Existing structure
Confirm that the house as it stands remains insured while work is taking place. Ask specifically about damage during structural alteration, temporary openings, roof work, underpinning or demolition. If these risks are excluded, you may need a specialist policy for a property undergoing renovation.
Contract works and materials
For larger projects, ask who is responsible for insuring the works in progress and materials awaiting installation. Contract works cover can protect new work and materials against insured damage before completion. Responsibility may depend on the building contract, so the insurance arrangement should match what the contract actually says.
High-value items stored on site deserve attention too. Windows, kitchen units and appliances can represent a large sum before installation. Ask whether materials are covered on site, in transit and before they become part of the building, and what security conditions apply.
Check the builder’s own insurance
Ask the contractor for current certificates and policy details rather than accepting a verbal assurance that they are “fully insured”. Public liability insurance is designed to respond to certain claims where the contractor’s activities cause injury to third parties or damage to their property. If the contractor employs people, employers’ liability insurance is generally compulsory in Great Britain and must normally provide at least £5 million of cover.
A practical example: an eight-week rear extension
Imagine you are building a rear extension and renovating the kitchen. For part of the job, the back wall is removed, temporary weather protection is installed and you move into rented accommodation for eight weeks. New glazing and kitchen units worth thousands of pounds arrive before installation.
Before demolition starts, you would want clear answers to four questions: will your insurer continue covering the original house during structural work; will the property be treated as unoccupied while you live elsewhere; who insures the extension and materials before completion; and does the builder have suitable liability and contract-related cover?
Answering those questions early is far easier than discovering a gap after a break-in, burst pipe or storm. It is also a good time to review your home renovation budget and contingency costs, because insurance, security and temporary accommodation affect the real project cost.
Keep written records and follow policy conditions
Save emails, endorsements, revised schedules and any special conditions agreed with the insurer. Keep copies of the building contract, contractor insurance documents and invoices for major purchases. Check any conditions attached to renovation or unoccupied home insurance, such as regular inspections, heating requirements, water being turned off, secured doors and windows, or limits on theft cover.
Frequently asked questions
Do I need special insurance for a home renovation in the UK?
Not for every job. Minor decorating or routine maintenance may be covered under a standard policy, but major structural work, extensions, extensive refurbishment or long unoccupied periods can require amended terms or specialist insurance. Tell your insurer before work starts and ask for confirmation in writing.
Does my builder’s public liability insurance cover damage to my house?
Not automatically. Public liability covers certain legal liabilities of the contractor, but it is not the same as insurance for your entire existing property, the works in progress or all materials on site. Check your own policy and the building contract as well as the builder’s cover.
How long can a house be empty before home insurance is affected?
There is no universal period. Many policies apply restrictions after 30 or 60 days, but the exact definition and consequences vary. Renovation can also make a property uninhabitable even when workers visit regularly, so ask your insurer how its unoccupancy clause applies.
Should I update my buildings insurance after the renovation?
Yes, if the work changes the rebuilding cost or other insured details. Extensions, loft conversions and high-spec improvements can affect the amount needed to rebuild the property. Give the insurer accurate information when the project is complete.
Protect the project before work begins
The key question is not simply whether you have a home policy, but whether every stage of the renovation is covered by the right party. Check the existing building, works in progress, materials, periods of unoccupancy and the contractor’s liabilities separately. Speak to your insurer before structural work starts, match the insurance arrangement to the building contract and keep confirmation in writing. That preparation can prevent a costly gap in cover when the property is at its most exposed.
