KO Appraisal
Guide

How to value a commercial property

Valuing commercial property means selecting the approach the market itself uses for that asset, applying it to verified data, and then reconciling what the approaches indicate into a single supported conclusion. The arithmetic is the easy part. The judgement is in deciding which evidence deserves weight.

Step one: define the assignment before touching a number

The same building supports different values depending on what is being asked. A lender needs market value; an estate needs fair market value at a date in the past; a condemnation matter needs just compensation under California law, which can include severance damages a lender report would never address. Under USPAP the intended user, intended use, standard of value, and effective date are identified at the outset, because they determine the scope of work.

This is also why an appraisal prepared for one purpose usually cannot be reused for another. The number was produced to answer a specific question.

Step two: determine highest and best use

Before value, the appraiser establishes the legally permissible, physically possible, financially feasible, and maximally productive use of the property. This is not procedural. A dated single-storey building on a parcel zoned for substantially more intensity may be worth more as a development site than as what it is, in which case capitalising its current income answers the wrong question entirely.

Step three: apply the approaches the market uses

Three approaches exist. Competent practice is not applying all three mechanically, it is reasoning about which the market actually relies on for this asset, applying those properly, and explaining the weight given to each.

  • Income capitalisation. Governs for property bought for its cash flow. Apartments, office, retail, industrial. Direct capitalisation divides stabilised NOI by a market-extracted cap rate; discounted cash flow models the stream year by year where income is irregular or lease rollover is material.
  • Sales comparison. Compares verified transactions of similar properties, adjusted for differences in location, size, condition, and terms of sale. Strongest where transactions are frequent and reasonably homogeneous; weakest for special-use property with few genuine comparables.
  • Cost. Estimates land value plus the current cost to construct the improvements, less accrued depreciation. Most relevant for new construction and special-use property that rarely trades; generally least reliable for older income property, where measuring accrued depreciation becomes largely a matter of judgement.

Step four: reconcile, rather than average

The approaches will not agree, and they are not supposed to. Reconciliation weighs them by the quality of the evidence behind each and by which one reflects how buyers of this asset actually behave. Averaging three indications is not reconciliation, it lets the weakest analysis pull the conclusion, and it is a recognisable sign of a report that has avoided making a judgement.

A well-supported appraisal states which approach governed and why, and explains what the others contributed. That reasoning is what makes the conclusion reviewable, and reviewable is the whole point when the report has to withstand a lender’s review, an IRS examination, or cross-examination.

What you should expect to provide

Turnaround and quality both depend heavily on how quickly the property information arrives. For an income property that generally means:

  • A current rent roll, with lease start and expiry dates, and any options or escalations.
  • Copies of the leases themselves for major tenants. Summaries omit exactly the provisions that matter.
  • Two to three years of operating statements.
  • Details of recent capital expenditure and any known deferred maintenance.
  • Site and building plans, and any survey or title report available.
  • For development sites, the entitlement status and any approvals in hand.

Common questions

How is commercial property value calculated?
Most commonly by dividing stabilised net operating income by a capitalisation rate extracted from comparable sales, cross-checked against the sales comparison approach and, where relevant, the cost approach. The result is a reconciled opinion supported by verified market evidence, not the output of a single formula.
How do you value a multifamily property?
Income capitalisation normally governs, since apartment buildings are bought for their cash flow, with sales comparison as strong support because multifamily transactions are relatively frequent. For two- to four-unit properties the balance shifts toward sales comparison, because those often sell to owner-occupants rather than investors.
Can I value a commercial property with an online calculator?
A calculator will divide income by a rate, which is arithmetic you can do yourself. What it cannot do is verify the income, determine whether the rate reflects comparable risk, assess highest and best use, or account for lease structure and condition. That work is the valuation; the division is not.
How long does a commercial appraisal take?
Typically one to three weeks from receipt of the property information, depending on complexity and data availability. The clock effectively starts when the rent roll, leases, and operating statements arrive. Incomplete information is the most common cause of delay.
What makes a commercial appraisal defensible?
Verified data, an explicit and reasoned highest and best use conclusion, market-extracted rates rather than assumed ones, and reconciliation that explains its weighting. A report is defensible when a competent reviewer can follow every step from evidence to conclusion and see why each judgement was made.
Who wrote this Kevin O'Brien, MAI, SRA. California Certified General Real Estate Appraiser #3005065, issued by the California Bureau of Real Estate Appraisers (BREA). Practicing in San Diego. This page reflects how these assignments are actually handled, not a summary of other people's summaries.
Where this applies Appraiser licensing is state-specific, there is no national appraisal licence, so appraisal engagements here are California properties, primarily San Diego County. The valuation methodology and the federal tax rules described above apply anywhere in the United States; if your property is in another state, you need an appraiser credentialed there, and this page should still tell you what to ask them for.

Related reading

Next step

Tell me about the property.

Most assignments start with a short call, property type, the purpose of the appraisal, and the deadline you are working against. You get a fixed quote before any engagement, never contingent on the value reached.

Typical commercial fees range $2,000–$4,000. Residential and simpler assignments quote lower. Every engagement is quoted in advance, so the figure is known before work begins.

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