How Can an Investor Assess Whether an Acquisition Price Is Supported by Comparable Sales?

A comparable sale supports an acquisition price only when the transaction and property are genuinely comparable and each adjustment can be explained. I would ask for the underlying sale details, test the price against income and condition, and keep current value separate from value that depends on future work.

Confirm What Each Sale Represents

Request the comparable sales set with addresses or parcel identifiers, closing dates, recorded prices, property size, occupancy, and permitted use. Confirm the transaction in independent records or through a qualified appraiser. Ask whether the price includes other assets, seller financing, concessions, assumed liabilities, or a portfolio of properties. A headline price may not represent the amount paid for the real estate alone.

Ask, "Was this an arm's length sale of a comparable property?" and "What facts would make this sale a poor comparison?" Flag distressed transactions, unusual financing, incomplete construction, and sales involving a different use or buyer context. Do not discard an imperfect sale without explanation. Show why it was included, adjusted, or excluded, so another reviewer can follow the reasoning.

Make Adjustments That Another Reviewer Can Reproduce

Compare location, size, layout, condition, occupancy, tenant quality, lease terms, deferred maintenance, and capital needs. A renovated asset with stable leases may command a different price from a property that needs substantial work or has near term vacancies. State the adjustment for each material difference and the evidence behind it. Avoid an unsupported percentage adjustment that simply moves the sale toward the proposed price.

Compare price per unit or per square foot where appropriate, but use that measure as a cross check. If income drives value, calculate the sale's implied capitalization rate using a consistent net operating income measure. Verify that income and expenses reflect the period and asset condition relevant to that sale. A price based on projected income deserves scrutiny if the projection assumes rapid rent increases or leaves recurring expenses out.

Reconcile Sales With Current Condition and Income

Compare the proposed property's operating results with those of the comparable assets. Review inspection findings and repair estimates. A lower price per unit may still imply an expensive purchase when major work is needed. For a property with planned improvements, show current value separately from the value after work, then subtract the cost, carrying period, and execution risk before relying on the improved value.

Ask, "What evidence supports paying above the closest comparable sale?" and "What is the price range if the planned improvements take longer or produce less income?" Consider an independent appraisal or broker opinion based on identified transactions and reconcile it with an income based valuation. The direct deal IRR and MOIC calculator can help show how the purchase price and exit assumptions affect projected returns. The portfolio models guide can help place the purchase in the wider portfolio plan.

Checklist

• Confirm sale prices and transaction details in independent records.
• Record why each sale is comparable, adjusted, or excluded.
• Document adjustments for location, condition, income, and lease terms.
• Cross check price per unit or area against income and property condition.
• Separate current value from value dependent on future improvements.
• Test the proposed price against lower income and a weaker exit value.

Talk with your attorney or CPA about legal and tax effects of the transaction structure.

Read next: What assumptions in a property's forecast deserve independent validation?

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Sources: Family Office Club investor due diligence framework, The Single Family Office. Informational only, not financial, legal or tax advice.