How Is Commercial Real Estate Valued?
Buyers of commercial real estate are buying an income stream, which is why two identical-looking buildings can be worth millions apart. Here is the short version of how value is set, where the cap rate comes from, and the mistakes that cost owners the most when they price a sale.
The short version: Most income-producing commercial property is valued by dividing net operating income by a market cap rate, then checked against comparable sales and, for newer buildings, replacement cost. Value rises with stable, documented income, long leases to strong tenants and good condition. It falls with vacancy, short remaining lease terms, dependence on one tenant and deferred maintenance.
This is the condensed version. The full guide, with 46 owner questions covering every major property type, appraisals, partner buyouts, eminent domain and three worked scenarios, lives at passive.investments/commercial-real-estate-valuation.
The one formula that sets the price
Take annual rent and other income, subtract vacancy and operating expenses (taxes, insurance, maintenance, management) to get net operating income, then divide by a market cap rate.
Value = NOI ÷ cap rate. $200,000 of NOI at a 7.5% cap rate is about $2.67 million. At 7.0%, the same income is worth about $2.86 million. A half-point move in the cap rate changes the price by roughly $190,000.
Appraisers also use the sales comparison approach (weighted heavily for land and owner-occupied buildings) and the cost approach (for new or special-purpose buildings), but for leased property, income carries the most weight. When income is about to change, through a lease-up or a big rollover, a discounted cash flow replaces the simple formula.
Where the cap rate comes from
From recent arm’s-length sales of similar properties in your market: same type, similar size, condition, tenant quality and lease term. National averages are a starting point, not an answer. And never include your own building’s implied cap rate in the comps; it makes the valuation circular.
There is no reliable free automated estimate for commercial property the way there is for houses. Sales are fewer and often confidential. The real sources are recorded deeds at the county, closed listings on commercial platforms, and a broker opinion of value from someone who sells that property type locally.
Leases move value more than the building
The lease file is the most important document in a commercial valuation. Take a strip center with $114,000 of NOI and one anchor in 70% of the space:
| Anchor lease | Likely cap rate | Value |
|---|---|---|
| 8 years remaining | About 7.75% | About $1.47M |
| 2 years remaining | About 9.0% | About $1.27M |
Same income, same building. The roughly $200,000 difference is the market’s price for the risk that most of the center goes dark.
Wondering What Your Building Is Worth?
A rent roll, a trailing-twelve operating statement and a list of lease expirations are enough to start. Text Carson for a candid read.
How vacant buildings are priced
Buyers value empty space on what it will earn once leased, then subtract the cost, time and risk of getting there. A fully vacant 6,000 SF retail building that would produce $90,000 of NOI is worth $1.125 million stabilized at an 8% cap rate. Then the buyer deducts:
| Deduction | Amount |
|---|---|
| A year of lost rent | $110,000 |
| Carrying costs | $25,000 |
| Tenant improvements at $15/SF | $90,000 |
| Leasing commissions | $33,000 |
| 10% profit allowance for the risk | $112,500 |
| As-is value | About $755,000, roughly two-thirds of stabilized |
The exception is an owner-user buyer, who may pay more for empty space they can move into.
Assessed value is not market value
Market value is what a buyer would pay today. Assessed value is a legal fraction of the county’s appraised value, used to calculate tax. In Tennessee, commercial and industrial property is assessed at 40% of appraised value, and counties reappraise only every few years, so tax values usually lag the market. Buyers should budget for a reassessment at the sale price.
Quick answers
How should I value a building I have owned for 20 years?
On today’s income, not your purchase price or what you have put in. Long-held buildings often carry below-market rent. A 40,000 SF warehouse leased at $6.25 NNN against an $8.50 market is worth about $3.2M as is; renewing at market before the sale lifts it to about $4.4M, more than $1 million added even after commission and a modest allowance.
Should I lease the empty unit before selling?
If you can sign a creditworthy tenant at market rent in a reasonable time, usually yes; documented income adds more than the leasing cost. Sell vacant if the likely buyer is an owner-user, or if leasing would take longer than you can wait.
Do I add land value on top of the income value?
No. For income property the land is already in the NOI. Only genuinely excess land that could be sold or developed separately adds value on its own.
Do property types use different methods?
The income approach applies to almost everything, but conventions differ. Net lease cap rates follow tenant credit and remaining term; self storage and mobile home parks need rebuilt NOI with a market management fee; seasonal RV parks often trade on earnings multiples. Industrial specifics are in What Is Small Bay Industrial?
Read the full guide: How Is Commercial Real Estate Valued? What Your Property Is Worth — 46 owner questions, property-type methods for office, net lease, land, self storage, mobile home and RV parks, appraisals and partner buyouts, plus three scenarios with the math.
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Disclaimer. This page is general information and is not an appraisal or legal, tax or investment advice. Cap rates and values are general 2026 illustrations that vary by market, property and lease terms. A formal valuation requires an appraisal by a licensed appraiser. Passive Investments is a commercial real estate brokerage.