Understanding how commercial property is valued is essential for any business owner, investor, or landlord operating in today’s dynamic real estate market. At Holloway Iliffe & Mitchell, we appreciate that accurate, professional valuations form the backbone of sound commercial property decisions, whether you’re looking to buy, sell, refinance, or manage your asset portfolio. In this article, we explain the main approaches to commercial property valuation, the key factors influencing value, and why relying on a qualified RICS valuer is critical to safeguarding your interests.
The Three Main Methods of Commercial Property Valuation
When it comes to valuing commercial property, there are three predominant methods widely recognised by industry professionals. Each has its place depending on the asset type, market context, and client requirements.
The Investment Method
Perhaps the most commonly employed approach for income-producing properties such as offices, retail units, and industrial estates is the investment method. This method calculates value based on the net rental income the property generates relative to the expected yield or return an investor demands.
To illustrate, if a property produces a net annual rent of £100,000 and similar assets are achieving a gross yield of 6%, the valuation would be approximately £1.67 million (£100,000 divided by 0.06). This “commercial property yield calculation” reflects both market demand and perceived risk, making it a fundamental benchmark for investors along the south coast and beyond.

The Comparable Method
Another vital technique is the comparable or “market” method, which relies on analysing recent sales and lettings transactions within the local vicinity—particularly in the highly active M27/A3 corridor around Portsmouth and Southampton. This method is especially effective where there is a sufficient volume of similar commercial properties, providing a transparent benchmark for price setting.
Using this approach, commercial valuers assess the sale prices of comparable premises, adjusting for differences in size, condition and location. This hands-on market intelligence often reveals insights into trends and subtle local factors that numerical calculations alone might miss.
The Cost Method
The cost or replacement method is typically reserved for specialist buildings where rent or sales data is scarce. It estimates the current cost to rebuild or replace the premises, factoring in depreciation and obsolescence.
While less frequently used for standard commercial units, the cost method plays a valuable role in advising on insurance valuations, bespoke developments, or where market evidence is limited.
Key Factors That Affect Commercial Property Value
Beyond these core valuation methods, there are several critical factors that influence commercial property values.
Lease Length and Covenant Strength
The terms of the lease play a significant role. Properties with long leases to financially strong tenants (known as covenant strength) tend to command higher values and lower yields, reflecting security of income. Conversely, short leases or tenants with weaker financial positions may reduce value due to increased risk.
EPC Ratings and MEES Compliance
Energy Performance Certificates (EPC) have increased in importance following MEES (Minimum Energy Efficiency Standards) regulations. A poor EPC rating can significantly affect a property’s marketability and value, especially as enforcement tightens. Valuers will carefully consider whether a property meets current standards and the cost implications of any necessary improvements.

Why You Need a Professional RICS Valuer
In an age of online “desktop estimates” and automated valuations, it’s crucial to understand their limitations. Only a registered valuer approved by the RICS can provide a valuation meeting the rigorous requirements demanded by banks, solicitors, and investors for lending institutions, sales & letting purposes, and tax & accounting purposes.
A professional RICS valuation considers all relevant methods, market evidence, and specific property features, delivering a comprehensive, defensible valuation report tailored to your asset and transaction context. This approach minimises risk and ensures transparency in your commercial property dealings.
Get in Touch for Reliable Commercial Property Valuation Services
At Holloway Iliffe & Mitchell, we combine local market expertise in the M27/A3 corridor with in-depth knowledge of property valuation principles to provide you with trusted, accurate valuations. Whether you require a formal valuation for an industrial unit in Portsmouth or a rent review service, our experienced team is here to help.
Request a professional RICS valuation for your asset today, or contact us to discuss your specific needs. To learn more about how to value commercial property effectively, head to our contact page today and secure your investment with expert advice you can rely on.