Why mixed-use comps lie — and how to underwrite around it.

← Back to Insights

By Sondra Barr, Director of Communications  ·  info@vestmont.com

Mixed-use is the hardest product type to comp in commercial real estate. A 150-unit apartment building with 12,000 sf of ground-floor retail is not a multifamily deal. It's not a retail deal. It's both — and the valuation methodology for each component pulls in different directions.

Most brokers and appraisers handle this by picking the dominant use and comping the whole asset against single-product peers. That approach produces BOVs that are either too high or too low, and sellers and buyers both end up frustrated.

Where the comps break down

The typical mixed-use asset in the Phoenix metro is 70–80% residential by revenue and 20–30% commercial (retail, restaurant, office, or medical). The temptation is to comp it as multifamily with a "retail kicker." Here's why that doesn't work:

• Multifamily buyers don't want retail risk. Institutional apartment buyers — REITs, pension funds, agency lenders — underwrite the residential component at multifamily cap rates and then discount the retail component aggressively, often at 100–200 bps wider. A 5.25% multifamily cap rate becomes a 6.75% blended cap rate when the retail carries vacancy or short-term leases.
• Retail buyers don't want residential management. Retail investors who understand inline leasing, CAM recoveries, and tenant mix don't want to manage 150 apartments. The buyer pool for mixed-use is narrower than for either component alone.
• Lenders comp each piece separately. Agency lenders will finance the residential component but often exclude commercial square footage from their underwriting — or apply a separate, less favorable valuation to it. This compresses your leverage relative to a pure multifamily deal.

How to build a defensible BOV

The right approach is a component-level valuation with a blended conclusion. Here's the framework we use:

1. Value the residential component independently. Use multifamily comps — per-unit pricing, cap rate, and rent comparables — for the apartment portion. Apply the same underwriting standards you would for a standalone apartment asset.
2. Value the commercial component independently. Use retail or office comps appropriate for the space type, lease terms, and tenant credit. A Starbucks on a 10-year NNN lease is worth something different than a local restaurant on a 3-year gross lease.
3. Apply a blending discount of 5–10%. This accounts for the narrower buyer pool, the management complexity, and the financing constraints. The discount is larger when the commercial component is vacant, when leases are short-term, or when the uses create operational conflicts (noise, parking, hours of operation).
4. Stress-test the commercial vacancy scenario. What's the asset worth if the ground-floor retail goes entirely vacant? If the answer is less than your basis, you have a problem. The residential component needs to carry the deal on its own.

The financing challenge

Mixed-use financing is more complex than single-product lending. The options:

• Agency (Fannie/Freddie): Will finance if commercial is less than 20–25% of NRA and generates less than 20% of revenue. Above those thresholds, you lose agency eligibility.
• Bank/credit union: More flexible on use mix but typically limited to 65% LTV and recourse. Works for smaller deals where the sponsor is comfortable with personal guarantees.
• CMBS: Can handle mixed-use at 70–75% LTV non-recourse, but underwriting is conservative and defeasance provisions limit flexibility.
• Bridge/debt fund: The most flexible on use mix, but the most expensive. Makes sense for transitional mixed-use where you're stabilizing the commercial component.

Our take

Mixed-use can be a great asset class for operators who understand both residential and commercial management. The key is underwriting honestly — don't comp the whole deal as multifamily, don't ignore the management complexity, and don't assume the commercial component will lease itself.