According to NCREIF's NPI Trends Report, 2026 edition, only around 500 properties within the NCREIF Property Index sell in a given year, and only for those sales does the actual transaction price replace the appraised value normally used in the index. Verified comp data is thinner than most underwriters assume, and the comps that do exist get treated inconsistently. Asking rents get used where executed rents belong, metro-level statistics answer submarket questions they were never built for, and brokerage summaries running 60 to 90 days behind get treated as current. Each input looks reasonable on the page and is wrong for the specific asset, and committee members tend to challenge the comp set first, which means the adjustment logic has to be visible.

This analysis draws on Smart Capital Center, a commercial real estate database and underwriting platform that queries 120M+ properties, 1B+ signals, and $500B+ analyzed, filtered to a specific submarket, asset class, vintage, and recent window, to show how underwriters can build a comp set that survives review.

What Are Comps in Commercial Real Estate?

A comp, or comparable, is a property transaction or lease used as evidence for a pricing or income assumption on a subject property. Underwriters lean on comps to support rent, cap rate, and value assumptions, but a comp only carries weight if it's actually comparable and its adjustments are documented, not assumed.

Definitions Worth Having on Hand

●      Comparable, or comp: a property transaction or lease used as evidence for a pricing or income assumption on a subject property.

●      Sale comp: a closed transaction used to support a value or cap rate assumption.

●      Rent comp: an executed lease used to support a rent assumption.

●      Effective rent: the rent a landlord actually collects over a lease term after concessions, free rent, and tenant improvement costs are accounted for.

●      Adjustment grid: the documented set of adjustments made to each comp to account for differences from the subject property.

●      Submarket: the specific competitive trade area a property sits in, usually narrower than the metro area most published data covers.

●      Transaction cap rate: a cap rate derived from an actual sale price, as distinct from an appraisal cap rate derived from a valuation.

The Four Types of CRE Comps That Matter

Sale comps support a value or cap rate conclusion using closed transactions. Rent and lease comps, drawn from executed leases, support the income assumption. Expense comps benchmark operating costs against similar assets, mattering most when a subject property's expense history looks out of line. Land comps support site value in ground-up and redevelopment deals, where there's no improved-property income to lean on.

The Comparability Test: What Actually Makes a Comp Comparable

Run each candidate comp through six checks, in order. A comp failing two or more is weak evidence no matter how clean the number looks.

1.   Submarket or competing corridor. Confirm the comp sits in the same competitive trade area, not just the same metro.

2.   Asset class and quality tier. A Class A and a Class B asset in the same corridor are not interchangeable evidence.

3.   Building vintage. Note the year built and the gap to the subject, since vintage drives both rent and expense structure.

4.   Size band. Confirm the comp falls within a defensible size range of the subject property.

5.   Lease structure. Triple-net and full-service leases produce different effective economics on identical headline rents.

6.   Transaction date. Older data needs a larger time adjustment or should be dropped instead of adjusted past the point of credibility.

Rent Comps: Asking Rent vs. Effective Rent

Asking rent is what's advertised. Effective rent is what a landlord actually collects over the lease term once concessions, free rent, and tenant improvement allowances are factored in, and the gap runs widest in exactly the markets where an accurate comp matters most. A comp quoted at asking rent without adjusting for two months free and a $40-per-square-foot TI package overstates the income it actually supports.

How to Find Comps for Commercial Real Estate

Ranking Comp Sources by Reliability

Comp sources aren't equally reliable, and treating them as interchangeable is where comp sets go wrong.

What a Stabilizing Cap Rate Environment Means for Older Comps

CBRE's U.S. Cap Rate Survey H2 2025, published February 2026, compiled roughly 3,600 cap rate estimates from more than 200 CBRE capital markets and valuation professionals across more than 50 U.S. markets, collected in early December 2025. Cap rates held largely unchanged across major property types, and nearly half of participants expected retail, industrial, and hotel cap rates to decline over the following six months. Tommy Lee, co-head of capital markets for the United States and Canada at CBRE, described the market as transitioning from volatility toward stability.

For a comp set, that stability is a working advantage. In a repricing market, a transaction six months old needs a large and hard-to-defend time adjustment. In a flat one, the same comp carries into committee with a smaller adjustment and less argument, which widens the usable window on an already thin pool.

How to Get Comps for Commercial Real Estate When Volume Is Thin

Comp availability varies sharply by property type. Newmark's 2Q26 data shows senior housing transaction volume up 96%, industrial up 50%, and office up 37% in the first half of 2026, meaning an office or specialty asset can leave an analyst with only two or three genuine comparables. When that happens, widen the geography before loosening asset-class or vintage criteria, since a slightly farther comp in the same competitive corridor usually beats a closer comp in a different asset class. Document why each remaining comp was kept, instead of quietly filling the gap with a weaker comp.

How Agentic AI Changes Commercial Property Comps Selection

A filtered query, run the same way by every analyst, replaces the manual comp hunt. Instead of one analyst pulling from a subscription tool and another from a broker relationship, agentic AI runs the same query: submarket, asset class, vintage, and a defined recent window across a shared data layer, and every comp it returns carries its source, so the adjustment logic can be shown in committee instead of described from memory. See also How AI Validates CRE Underwriting Assumptions at Scale. Centers Dynamic Partners underwrites deals 4x faster using this approach, per George Arce Jr.

Building a Firm-Specific Comp Library

Every document a firm analyzes, every rent roll, every closed sale, every executed lease, strengthens its own benchmark set. That compounds: a firm that has underwritten forty industrial deals in one submarket has a comp library no outside subscription can replicate, built from its own verified transactions.

A Worked Example: Building the Adjustment Grid

Consider a 45,000-square-foot industrial building built in 2015; three comps clear the comparability test.

The adjustment grid is what a committee reviews. Showing the logic behind each adjustment turns three transactions into a defensible $9.17 conclusion instead of an unexplainable average.

The Comp Mistakes That Get Flagged in Committee

Four mistakes come up most often: using asking rent where executed rent belongs, which overstates income; leaning on metro-level statistics to answer a submarket question, masking real variation between corridors; treating a 90-day-old brokerage summary as current; and presenting an average of dissimilar comps instead of a documented, adjusted set, which collapses the moment a committee member asks why a specific comp was included.

The Bottom Line: Documentation Beats Transaction Count

A commercial real estate lease comps set is only as good as the documentation behind each adjustment. Committee members challenge the comp set first because it's usually the softest part of an underwriting package, and a filtered, sourced query closes that gap faster than a manual pull ever could. Smart Capital Center applies exactly that lens, with 120M+ properties, 1B+ signals, and $500B+ analyzed, so every comp an analyst brings to committee already carries its source. For related reading, see How to Find Reliable Commercial Real Estate Benchmarks and Due Diligence for CRE Investors: Checklist.

Bring a sourced, adjusted comp set to committee without assembling it by hand.

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Frequently Asked Questions

Q: What are comps in commercial real estate?

A: A comp, or comparable, is a property transaction or lease used as evidence for a pricing or income assumption on a subject property. Sale comps support value and cap rate conclusions, rent comps support income assumptions, and both only carry weight when the comp clears a comparability test on submarket, asset class, vintage, size, lease structure, and transaction date.

Q: How do I find comps for commercial real estate?

A: Start with executed leases and closed sales, since they're the most reliable, then layer in public records and subscription aggregation to fill gaps. Survey and opinion data and active listings should not anchor a comp set, since neither reflects a completed transaction.

Q: How do I get comps for commercial real estate when there's almost nothing recent to pull?

A: Widen the geography within the same competitive corridor before loosening asset class or vintage criteria, and document explicitly why each comp that remains was kept. Two or three well-documented, truly comparable transactions defend better in committee than a longer list padded with weak matches.

Q: How do I run comps on commercial real estate the way underwriters actually do it?

A: Pull candidates from executed leases and closed sales, filter them against the comparability test, then build an adjustment grid that documents every adjustment made for differences from the subject property. The adjustment grid is what a credit or investment committee reviews.

Q: What's the difference between asking rent and effective rent in a lease comp?

A: Asking rent is the advertised rate, while effective rent is what a landlord actually collects after concessions, free rent, and tenant improvement allowances are factored in. Using asking rent where effective rent belongs is one of the most common errors flagged in committee.

Q: Can I trust CRE comps from a subscription database without checking the source?

A: You can trust reliable CRE comps providers for brokers and investors, but still verify the comps, since subscription aggregation varies in how well it verifies the underlying transaction. Executed leases and closed sales remain the most reliable source, and any comp pulled from a database should still be traceable back to the document or filing behind it.

Q: How does Smart Capital Center help with sales comps for commercial real estate?

A: It runs a filtered query, submarket, asset class, vintage, and a recent window, with 120M+ properties, 1B+ signals, and $500B+ analyzed, so every analyst on a team pulls the same sourced comp set instead of assembling one by hand. Centers Dynamic Partners now underwrites deals 4x faster.

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