Buildings and Contents Insurance Explained 2026

Home insurance sits at the intersection of financial protection and legal obligation, yet many homeowners set it up once and never revisit it. Getting the buildings sum insured wrong, misunderstanding what contents cover actually protects, or buying a standard policy for a property that needs specialist cover can leave you facing enormous uninsured losses when a claim arises. This guide covers what you actually need to know.

Buildings Insurance: What It Covers and What It Does Not

Buildings insurance protects the physical structure of your home and its permanent fixtures and fittings. This includes the walls, roof, floors, ceilings, doors, windows, fitted kitchen units and worktops, bathroom suites, built-in wardrobes, solar panels fixed to the roof, garden walls, gates, driveways, and outbuildings such as a garage or garden shed (depending on policy wording).

A standard buildings policy typically covers damage caused by fire, storm, flooding, escape of water (burst pipes), subsidence, vandalism, and impact (for example, a vehicle hitting your wall). Most policies also include liability cover, protecting you if someone is injured on your property and holds you responsible.

What standard buildings insurance does not cover is equally important. Wear and tear (gradual deterioration), rot, infestation (mice, insects), and damage from lack of maintenance are almost universally excluded. Deliberate damage is excluded. Some policies exclude storm damage to fences or gates. And critically, flooding or subsidence exclusions may apply to properties with a known history of these events.

Always read the policy exclusions before buying. Two policies at similar prices can have very different exclusion lists. If your property has had a previous insurance claim -- particularly subsidence or flooding -- be transparent when applying, as non-disclosure can invalidate a future claim.

Setting the Right Sum Insured: Rebuild Cost vs Market Value

One of the most common mistakes in buildings insurance is confusing the rebuild cost (what your sum insured should reflect) with the market value (what you paid or could sell for).

These figures can be dramatically different. A Victorian terraced house in London might have a market value of £600,000 but a rebuild cost of £250,000 -- the labour and materials to reconstruct the physical building. Conversely, a large rural property with specialist construction (stone walls, slate roof, timber frames) might have a rebuild cost exceeding its market value.

The BCIS (Building Cost Information Service) House Rebuilding Cost Calculator, available via the Association of British Insurers website, provides an estimate based on property type, size, and location. This is the industry-standard reference point for setting your sum insured.

Under-insuring -- setting a sum insured below the true rebuild cost -- can trigger the "average" clause in your policy. Under this clause, your insurer pays only the proportion of any claim that reflects the ratio of your sum insured to the true rebuild cost. So if you insure for 70% of rebuild cost and submit a claim for £50,000, you may only receive £35,000.

Review your buildings sum insured annually. Build costs tend to rise with inflation -- the BCIS regularly publishes updated figures and many insurers apply automatic index-linking to keep pace, but you should still verify this is happening correctly.

Accidental Damage: Is the Extension Worth It?

Standard buildings policies cover sudden, unexpected events caused by external factors. Accidental damage extensions go further and cover unintentional damage you or your family cause to the property.

Common accidental damage claims under buildings cover include: drilling through a water pipe or electrical cable, knocking out a double-glazed unit, children kicking a ball through a window, or breaking ceramic floor tiles. Without the extension, these would not be covered because they do not result from an insured peril -- they are self-inflicted damage.

On the contents side, accidental damage extends cover to dropped or broken items such as televisions, laptops, or glass items. The extension is particularly valuable for households with children.

The additional premium for accidental damage cover varies by insurer but is typically £50 to £150 per year for buildings and a similar amount for contents. Whether it is worth the cost depends on your circumstances -- a household with young children and expensive electronic equipment is a stronger candidate than a retired couple who rarely have tradespeople in the property.

Flood Risk: Flood Re and What It Means for Your Premiums

Around 5.2 million properties in England are estimated to be at some risk of flooding. For homeowners in high-risk areas, obtaining buildings insurance at an affordable premium has historically been difficult.

Flood Re is a joint initiative between the government and the insurance industry, established to make flood insurance available and affordable for high-risk residential properties. Insurers can cede (transfer) the flood risk element of eligible policies to the Flood Re pool, which is funded by a levy on all UK home insurers. This caps the flood element of the premium that high-risk households pay.

Flood Re covers properties built before January 2009. New-build properties are excluded -- the logic being that they should not be built in high flood risk areas in the first place. Band H council tax properties are also excluded.

To check your property's flood risk, use the Environment Agency's Flood Map for Planning (long-term flood risk checker online). Even if your property is at lower risk, it is worth understanding proximity to watercourses or drainage infrastructure, as these affect both insurance terms and future saleability.

New-Build Properties: NHBC Buildmark and Insurance

Buyers of newly built properties receive an NHBC (National House-Building Council) Buildmark warranty as standard on most new builds registered with NHBC. Buildmark runs for 10 years and covers structural defects: for the first two years the builder must remedy any defects, and from years three to ten the NHBC cover kicks in for major structural issues.

However, Buildmark is not a substitute for buildings insurance. It does not cover events such as fire, storm damage, burst pipes, or theft. You still need a standard buildings insurance policy from the point you exchange contracts.

Buildmark does provide some additional confidence during the first two years -- any snags or defects are the builder's responsibility to fix. But from an insurance perspective, new-build owners have the same coverage requirements as buyers of older properties.

Some new-build developers use alternative structural warranty providers (Premier Guarantee, LABC Warranty, etc.) rather than NHBC. These serve the same function but may vary in the detail of what they cover. Always read your warranty documentation and ensure your mortgage lender accepts the warranty provider used.

HMO Insurance: When Standard Policies Fall Short

A house in multiple occupation (HMO) is a property rented by three or more unrelated individuals who share facilities such as a kitchen or bathroom. Standard residential buildings insurance does not extend to HMOs, and landlords who fail to arrange appropriate cover face both financial exposure and potential legal liability.

HMO landlord insurance is a specialist product that accounts for higher occupancy levels, the increased risk of accidental damage and deliberate damage by multiple tenants, and the legal obligations associated with operating an HMO (including licensing requirements in England).

Key features of HMO insurance typically include loss of rent cover (if the property becomes uninhabitable), liability cover for property owner negligence, legal expenses cover (for tenancy disputes and eviction proceedings), and optional contents cover for furnished common areas.

Premium levels reflect the property type, number of occupants, local authority licensing requirements, and claims history. HMO insurance typically costs significantly more than standard landlord insurance, but operating without appropriate cover is a substantial risk that any reputable letting agent would flag immediately.

Letting Agent Requirements and Insurance

Letting agents managing rented properties have their own insurance obligations and may impose requirements on landlords whose properties they manage. These typically include: insisting on valid buildings insurance as a condition of management, requiring proof of insurance annually, and ensuring the policy includes property owner's liability cover.

Agents cannot lawfully require landlords to use a specific insurer or policy, but they can and do withdraw management services if adequate insurance is not in place. Some larger letting agencies have preferred insurer panels and offer group rates, which can be cost-effective -- but always compare these against the open market.

Tenants living in rented properties are responsible for their own contents insurance. Buildings insurance for the structure is always the landlord's responsibility. Landlords should ensure their policy clearly notes that the property is let, as an undisclosed change of use from owner-occupied to rented can invalidate a claim.

Reviewing your home insurance every year at renewal -- rather than auto-renewing -- is one of the simplest ways to ensure you have the right cover at a competitive price. The market changes, rebuild costs change, and your property and circumstances change. An annual review costs nothing and could save you significantly in the event of a claim.