2025 Guide

Buildings Insurance Calculator UK 2025

Estimate your rebuild cost and typical annual premium. Understand what buildings insurance covers and how to make sure you have the right level of protection.

MB
Mustafa Bilgic Financial Content Specialist • Updated 20 February 2026

What Does Buildings Insurance Cover?

Buildings insurance protects the physical structure of your home from a range of risks. If your property is damaged by an insured event, buildings insurance will pay for the cost of repair or — in extreme cases — a complete rebuild. Crucially, it covers the rebuild cost, not the market value of your home.

Typically Covered

Walls, roof, floors, ceilings, doors, windows, fitted kitchens, fitted bathrooms, garages, outbuildings, fences, paths, driveways, underground pipes and cables, swimming pools

Typically NOT Covered

Contents and personal belongings, general wear and tear, gradual deterioration, some flood damage (check policy), pest infestation, damage caused by poor workmanship

Typical Events Covered

  • Fire, explosion, and lightning
  • Storm and wind damage
  • Escape of water from burst pipes
  • Theft or attempted theft
  • Subsidence (check for exclusions)
  • Falling trees or aircraft
  • Vehicle collision with the building
Flood Cover: Not all standard buildings insurance policies automatically include flood damage, especially in high-risk areas. Always check the policy wording carefully. The Flood Re scheme helps homeowners in high flood-risk areas access affordable insurance through participating insurers.

How Much Does Buildings Insurance Cost?

The average cost of buildings insurance in the UK is between £200 and £400 per year for a standard property, according to ABI data. However, costs vary considerably depending on a range of factors specific to your property and circumstances.

Factors Affecting Your Premium

Rebuild Cost

The higher the rebuild value, the higher the premium. Getting this right is critical — under-insuring means you may not receive enough in a claim.

Location

Areas with higher crime rates, subsidence risk, or flood risk attract higher premiums. Your postcode is one of the most important rating factors.

Property Type

Detached houses generally cost more to insure than terraced properties. Non-standard construction (e.g. thatched roofs, timber frames) costs significantly more.

Claims History

Previous claims — even those made with a different insurer — typically increase your premium. Most insurers ask about claims in the last 5 years.

Voluntary Excess

Choosing a higher voluntary excess (the amount you pay first in any claim) usually reduces your premium, sometimes significantly.

Security Features

Approved alarms, deadlocks, and window locks can reduce your premium. Some insurers require minimum standards set by the Association of British Insurers (ABI).

Average Rebuild Costs (BCIS Guide 2025)

Property TypeApprox. Rebuild Cost per m²
Standard terraced/semi-detached£1,500 – £1,900/m²
Standard detached house£1,700 – £2,100/m²
Flat / apartment£1,400 – £1,800/m²
High-spec or contemporary build£2,100 – £2,500/m²
Listed/period property£2,500 – £3,500+/m²
Thatched property£3,000 – £4,500+/m²
Important: These are approximate rebuild costs based on BCIS data. The rebuild cost is NOT the same as the market value of your home. In many areas, especially London, the market value significantly exceeds the rebuild cost. Use the RICS/BCIS rebuild calculator for a more precise estimate, or commission a professional RICS valuation.

Special Property Situations

Listed Buildings

If your home is a listed building (Grade I, II* or II), standard insurance is unlikely to be sufficient. Listed buildings require specialist insurance because any repair work must use traditional materials and techniques, which are significantly more expensive. The rebuild cost can be many times higher than an equivalent modern property. Always use an insurer that specialises in listed buildings.

Leasehold Properties (Flats)

If you own a leasehold flat, buildings insurance is almost always the responsibility of the freeholder, not you. You will usually pay for it through your service charge. You can ask to see the buildings insurance certificate at any time. You would only need to arrange buildings insurance yourself if your lease specifically requires it or if you are a share-of-freehold owner.

Subsidence Risk

Subsidence — where the ground beneath a property sinks — is a significant risk in some parts of the UK, particularly in areas with clay soil or former mining activity. Properties with a history of subsidence can be very difficult to insure. If you are buying a property, commission a full structural survey to check for signs of movement. Specialist subsidence insurers exist for affected properties.

Flood Risk

Check the Environment Agency's Flood Map for Planning to see your property's flood risk zone. High-risk properties can struggle to find affordable buildings insurance. The Flood Re scheme, run jointly by the government and the insurance industry, helps by reinsuring flood risk for eligible properties. However, Flood Re does not cover properties built after 1 January 2009, commercial properties, or social housing.

Home Working and Business Use

Working from home may affect your buildings insurance, particularly if you see clients at your property or store business stock at home. Always inform your insurer if you use your home for business purposes. Some standard home policies will cover basic home working (using a laptop for office work), but others may require you to add a home business extension or take out a separate policy.

Buildings Insurance and Mortgages

If you have a mortgage, your lender will almost certainly require you to have buildings insurance in place as a condition of the mortgage. While your lender cannot force you to buy insurance from them, they can require evidence of adequate cover. Shopping around via comparison sites or an insurance broker typically gets a much better price than accepting the lender's own product.

Frequently Asked Questions

What does buildings insurance cover in the UK?
Buildings insurance covers the physical structure of your home: walls, roof, floors, ceilings, doors, windows, and permanent fixtures such as fitted kitchens and bathrooms. It also covers outbuildings, garages, fences, driveways, and underground pipes. It pays for repair or rebuilding costs if your home is damaged by insured events like fire, storm, burst pipes, theft, or subsidence. It does NOT cover your contents or personal belongings — those require a separate contents insurance policy.
How much does buildings insurance cost in the UK?
The average cost of buildings insurance in the UK is between £200 and £400 per year for a standard residential property. However, costs vary significantly. A small terraced house in a low-risk area might cost as little as £150/year, while a large detached house in a flood-risk area could cost £600 or more. Always compare quotes from multiple insurers and consider using a broker for non-standard properties.
What is the rebuild cost and why does it matter?
The rebuild cost (also called the reinstatement cost) is the total cost to demolish and completely rebuild your home from scratch if it were destroyed. This includes materials, labour, architects' fees, and site clearance. It is not the same as the market value of your property. You must insure your property for its full rebuild cost — if you under-insure, insurers may reduce any claim settlement proportionally (known as "average"). BCIS estimates average rebuild costs at roughly £1,500–£2,500 per square metre in 2025.
Is buildings insurance compulsory in the UK?
Buildings insurance is not a legal requirement in the UK. However, it is almost always a contractual requirement of your mortgage. If you have a mortgage, your lender will require evidence of buildings insurance before releasing funds — and will require you to maintain adequate cover throughout the mortgage term. Even without a mortgage, going without buildings insurance is extremely risky given the potentially catastrophic cost of repairing or rebuilding a damaged or destroyed property.
Do leasehold flat owners need buildings insurance?
Generally, no. If you own a leasehold flat, the freeholder is responsible for buildings insurance for the whole block, and the cost is passed to leaseholders through the service charge. You are responsible for contents insurance only (covering your furniture, appliances, and belongings). However, always check your lease as there can be variations, particularly with share-of-freehold arrangements where leaseholders collectively manage the building.
Does buildings insurance cover flooding?
Many standard buildings insurance policies include flood cover, but this is not universal. If you are in a high flood-risk area (check the Environment Agency flood map at gov.uk), some insurers may exclude flood damage or charge very high premiums. The Flood Re scheme exists to help homeowners in high-risk areas access affordable insurance — participating insurers can offer cover to eligible homes at a subsidised rate. Note that Flood Re does not cover properties built after 1 January 2009.
Can I combine buildings and contents insurance?
Yes. Most insurers offer a combined buildings and contents policy that covers both the structure and your belongings under one policy. This can sometimes be cheaper than buying them separately, and it simplifies the process of making a claim if both the building and contents are damaged in the same event (such as a flood). However, always compare combined vs separate policies to find the best value.