Commercial real estate data is fragmented across a handful of specialized providers, each with different strengths, different coverage, and different pricing. Unlike public equities, where Bloomberg terminals and SEC filings provide essentially comprehensive data, CRE transactions happen in private markets with no central clearinghouse, no mandatory disclosure, and significant variation in how deals are reported. Sophisticated analysts triangulate across multiple data providers, recognizing that no single source captures the full picture and that cross-referencing is the only way to produce reliable market analysis. Understanding what each provider covers and what they miss is essential for anyone doing serious CRE research.
CoStar is the dominant provider for property inventory, lease data, and comparable sales on a property-by-property basis. The CoStar database covers millions of commercial buildings across North America with property characteristics, ownership history, tenant rolls, and historical rent data. CoStar's strength is comprehensiveness: for any given submarket, a CoStar research portal typically shows the full inventory of buildings, most of the tenants, most of the leasing activity, and most of the transactions. The weakness is that data quality varies dramatically by market — primary markets have excellent coverage, tertiary markets have significant gaps — and that CoStar collects much of its data through voluntary broker reporting, which means new transactions may lag the market by weeks or months and may be incomplete until the reporting broker updates the record. CoStar acquired LoopNet to cover the listing side and Apartments.com to cover residential data, and its overall dominance in the information layer is one of the defining structural facts of commercial real estate data.
Real Capital Analytics (RCA), now owned by MSCI, is the standard provider for institutional transaction data. Where CoStar focuses on inventory, RCA focuses specifically on sales activity over a minimum deal size (typically $2.5 million), producing a near-comprehensive database of institutional CRE transactions with cap rates, buyer/seller identities, financing terms, and property characteristics. RCA's data feeds the Commercial Property Price Indices published by Green Street and is the primary source for institutional market-level cap rate analysis and volume tracking. Green Street Advisors itself is a separate specialized provider focused on REIT research, NAV estimates, and institutional market commentary — producing the consensus NAV numbers that most REIT investors treat as the reference point for premium/discount analysis. These three providers — CoStar, RCA/MSCI, and Green Street — form the core of institutional CRE data infrastructure, and most serious research mandates rely on all three.
A growing set of newer data providers are challenging the incumbents in specific niches. CompStak crowdsources lease data from brokers in exchange for access to the aggregated database, with a focus on detailed lease terms (concessions, TI allowances, free rent) that are harder to find in traditional sources. Yardi Matrix has built a strong position in multifamily data and is expanding into other sectors. Reonomy and several similar databases use public records and alternative data sources to produce property-level intelligence at lower price points than CoStar. Each provides a different slice of the market, and for specific research questions — How much TI is being offered in Class A office in Chicago right now? What is the actual concession package in Dallas industrial? — the specialized providers may offer better data than the generalist platforms. The question for any research project is which sources to consult and how much weight to give each, and that question does not have a single correct answer — it depends on the specific geography, property type, and analytical question being investigated.
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