Your rebuild cost is the estimated price to rebuild your property from scratch, excluding land. It’s what your buildings insurance sum insured should cover. Many UK properties are underinsured, so use the calculator below as a guide and consider a professional valuation for accuracy.
As a landlord, knowing the estimated rebuild cost of your rental property helps make sure your investment is fully protected. This guide explains how rebuild costs work, how to calculate your property’s value, and why insurers require this information.
Landlord rebuild cost calculator
Use our calculator to get an estimate of what it could cost to rebuild your rental property. We use recent regional average property prices per square metre and multiply them by the size of your property.*
The above calculator is just an estimate and doesn’t include all costs (for example, planning fees, architects, and demolition). For accuracy, consider a RICS chartered surveyor or professional rebuild assessment
What is a rebuild cost?
A rebuild cost, also known as a reinstatement value, is the total amount required to rebuild your property from the ground up after major damage. This figure covers materials, labour, and professional fees, but completely excludes the value of the land.
You might need to rebuild your property if it suffers complete destruction from an event like a fire, flood, or severe storm.
Rebuild values are typically lower than the property’s current market value, or even the price you paid for it. When calculating the rebuild cost for your rental property, the two main factors you need to consider are the current costs of labour and materials.
Rebuild cost vs market value
The market value of your property factors in the desirability of the location, buyer demand, and the land itself. Your rebuild cost strictly focuses on the physical reconstruction: materials, labour, and professional fees (such as architects). Your insurance sum insured must reflect this rebuild cost, not your property’s sale price.
For example, if you bought a property for £350,000 that now has a market value of £425,000, the actual rebuild cost might still sit below £300,000.
The average rebuild cost varies significantly across UK regions. Recent government data highlights these regional average property prices to get an idea of market value:
| Region | Average price December 2025 |
| East Midlands | £244,000 |
| East of England | £338,000 |
| London | £551,000 |
| North East | £165,000 |
| North West | £217,000 |
| South East | £379,000 |
| South West | £301,000 |
| West Midlands | £246,000 |
| Yorkshire and the Humber | £208,000 |
You can also use the following documents to get an idea of the rebuild value of your rental property:
- existing buildings insurance policy documents
- property deeds
- survey report
- mortgage valuation report
Always remember that figures from historical documents go out of date quickly. Rising costs for labour and materials mean you should regularly reassess your property’s value when remortgaging or renewing your buildings insurance.
Read more: The ultimate guide to landlord insurance
How to do a rebuild cost assessment for your property
You have two main options to estimate your property’s current rebuild cost.
1. Use a rebuild cost calculator
This is a fast and cost-effective option, though it requires some input from you. To get an accurate estimate from a calculator, you need to know:
- when the property was built
- overall size of the property in square metres or feet
- property type and number of rooms
We have our own free property rebuild cost calculator on this page. There’s also the Building Cost Information Service (BCIS) rebuild cost calculator, one of the best-known and widely used. It’s free but you’ll need to register to access it.
2. Using a surveyor
The more hands-off and highly accurate approach is to hire a building surveyor. While this costs more than a free online tool, it’s essential for landlords who own listed properties or homes built with non-standard materials, such as thatched roofs.
What affects rebuild cost (and what a calculator doesn’t include)
Your property’s rebuild cost rises and falls alongside changes in the wider construction industry.
For example, new data from the Department for Business & Trade found that the price for construction materials increased by 2.1% in February 2026 compared with February 2025.
On top of this, the cost to rebuild your property from scratch could also increase if you make changes such as an extension or loft conversion.
Key variables that impact your rebuild price include:
- location
- materials
- access constraints
You also need to budget for additional expenses that standard calculators don’t include:
- planning fees
- architect fees
- demolition
- waste removal
- VAT
Keeping up to date with the latest labour and material costs, while also taking rebuild costs into account when renovating your property, will make life easier when it comes to renewing insurance or getting a new buy-to-let mortgage.
Why your rebuild cost matters for landlord insurance
Insurers may need your property’s accurate rebuild cost to determine your premium and coverage limits. This tells them exactly how much it would cost to reconstruct the building if you ever need to make a claim.
Recent industry analysis revealed that 70% of UK properties are underinsured and 23% overinsured.
If you underestimate the rebuilding costs, you could lose thousands of pounds as the insurer will only pay out up to the amount you provided when taking out your policy.
Meanwhile if you overestimate how much it would cost to rebuild your property from scratch, you’ll be paying a higher insurance premium unnecessarily.
Greg Caswell-Smith, Insurance Product Manager at Simply Business, says: “Your property’s market value is what you pay to buy it – but its rebuild cost is what the bricks, mortar, and builders actually cost. Insurers ask for an accurate figure because they aren’t insuring your purchase price, they’re insuring the consequences of a total loss.
“If you underinsure your property, you could find that you don’t have enough to rebuild it after a fire or other serious claim. Additionally an ‘average clause’ could be applied, meaning any claim payment could be reduced in proportion to the underinsurance – leaving you with a significant financial shortfall.”
Read more: Underinsurance: the hidden risk that could cost your business
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Rebuild cost FAQs
Do insurers use the market value or rebuild cost?
Insurers strictly use the rebuild cost. This figure focuses solely on the labour, materials, and fees needed to reconstruct the building, completely excluding the land and location value.
How often should I update my rebuild cost?
You should review your rebuild cost at every policy renewal, immediately after completing any renovations or extensions, or if construction material prices spike. Listed or non-standard buildings generally require regular professional assessments.
What’s the difference between rebuild cost and reinstatement value?
In the context of property insurance, there’s no difference. Both terms refer to the total cost required to rebuild your property to its previous standard.
Should landlords insure for loss of rent as well as buildings?
Many landlords choose to add loss of rent cover to their policies. This makes sure your rental income is protected if an insured event – like a fire or flood – makes the property completely uninhabitable for you
Useful guides for buy-to-let landlords
- Renting out your property: rules for landlords in 2026
- What is permitted development? A buy-to-let landlord’s guide
- What is building regulations indemnity insurance?
- How to get a buy-to-let mortgage: a simple guide
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*Regional average property prices from https://www.plumplot.co.uk/