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How your commercial rebuild cost assessment is calculated

Safeguarding your assets, your people and your customers | 6 minute read

Calculating a commercial building’s rebuild cost is vital for protecting business assets. It reflects the estimated expense of fully reconstructing the property, including materials, labour and meeting current building regulations.

Key takeaways

1. An accurate rebuild cost assessment is critical for effective insurance coverage, and to ensure you aren’t over or underinsured.
2. Rebuild cost is based on reconstruction expenses – not market value. Construction type, location, specialist features, regulatory requirements, inflation and professional fees are all included.
3. A comprehensive, systematic checklist ensures reliable estimates and stronger risk management. Evaluation elements like structural integrity, fire and flood risk, demolition needs, and environmental hazards helps align insurance coverage with real-world rebuilding conditions.


Why rebuild cost assessments matter

Getting your rebuild estimate right is essential, as underestimating can leave you underinsured and facing significant financial shortfalls, while overestimating may result in unnecessarily high premiums. 


79%

of commercial buildings and 70% of residential properties are underinsured; insured on average for just 63% of true rebuild cost.

Source: RebuildCostASSESSMENT.com


43%

Rebuild costs in the UK have risen by around 43% between 2020 and 2024.

Source: BCIS

What is a rebuild cost assessment?

Rebuild cost is not the same as market value. It focuses solely on the cost of rebuilding, which can be influenced by factors such as the type of construction, location, accessibility, and any specialist features your building may have. Additionally, changes in building codes, inflation, and supply chain fluctuations can all impact the final figure.

Since the pandemic, shortages of building materials and skilled workers have caused rebuild costs to rise sharply. Some materials, like steel, saw price jumps of over 70% in 2022 alone. Labour shortages have added further pressure, making projects more expensive and slower. This means relying on old rebuild estimates can leave your insurance cover too low, so regular, up-to-date assessments are essential.

The checklist below explains why an accurate assessment matters. It outlines the key components that affect rebuild costs and provides practical steps to calculate a reliable estimate. By following these principles, you can ensure your insurance coverage is aligned with real-world rebuilding expenses, giving you peace of mind and financial security should the unexpected happen.

Comprehensive checklist for rebuild costs and risk assessments

Factor Description Action
Building size and layout Total floor area and structural complexity Measure accurately and confirm plans
Construction type Materials used (e.g. steel, concrete, timber) Identify primary and secondary materials
Location and accessibility Impact on labour and transport costs Assess site access and local conditions
Specialist features Unique elements (e.g. lifts, HVAC systems, bespoke finishes) List all specialist installations
Compliance and regulations Current building codes and safety standards Check for updates in local regulations
Inflation and market trends Changes in material and labour costs over time Apply latest cost data and indices
Professional fees Architects, surveyors, and project management costs Include estimated professional charges
Demolition and clearance Removing debris and preparing site for rebuild Factor in disposal and clearance costs
Fire risk Fire safety measures and vulnerability Review fire suppression systems
Flood risk Exposure to flooding or water damage Check flood zone maps and mitigation steps
Structural integrity Condition of foundations and load-bearing elements Conduct structural surveys
Security risk Vulnerability to theft or vandalism Assess security systems and access control
Environmental hazards Risks from asbestos, chemicals, or hazardous materials Plan for safe removal and compliance

By reviewing these factors systematically, businesses can ensure their insurance coverage reflects true rebuilding costs and addresses potential vulnerabilities effectively.

How NFP can help

Working closely with us as your insurance broker can help ensure your rebuild cost assessment is accurate and up to date. Brokers have the expertise to review your property, understand its unique features, and identify factors that affect rebuilding costs, such as specialist materials, compliance requirements, or environmental risks.

Our specialists can also advise on adjusting your cover as market conditions change, including rising material and labour costs. By collaborating with NFP as your broker, you can make sure your insurance reflects the true cost of rebuilding, reduce the risk of underinsurance, and gain peace of mind that your business assets are properly protected.

A rebuild cost assessment needs to reflect your property’s specific features and the risks it faces. Your broker can help ensure your insurance matches the true cost of rebuilding, giving you confidence and peace of mind should the unexpected happen.

Kayleigh Houghton
Head of business improvement - Commercial insurance

Want to see how we can help?

The landscape of business risk management is getting more complex every day, and staying one step ahead of industry changes is a full-time job. NFP are here to help you navigate theses complexities, giving you peace of mind that your business is fully protected so you can focus on your business goals.


General disclaimer

This insights article is not intended to address any specific situation or to provide legal, regulatory, financial, or other advice. While care has been taken in the production of this article, NFP does not warrant, represent or guarantee the accuracy, adequacy, completeness or fitness for any purpose of the article or any part of it and can accept no liability for any loss incurred in any way by any person who may rely on it. Any recipient shall be responsible for the use to which it puts this article. This article has been compiled using information available to us up to its date of publication.


NFP contributors

Kayleigh Houghton
Head of business improvement - Commercial insurance



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