CoStar Closes $800M Zonda Acquisition, Bolstering Residential Data Analytics

The Quick Take

• CoStar Group has closed its $800 million acquisition of Zonda, a leading residential construction and new home data provider
• Zonda joins CoStar's residential segment, which posted $444M in Q2 2026 revenue, up 33% year over year
• The deal strengthens CoStar's data and analytics position in new home construction and residential development markets

CoStar Group has completed its $800 million acquisition of Zonda, a data and analytics company specializing in new residential construction, builder analytics, and housing market intelligence. Zonda will operate within CoStar's residential segment, which generated $444 million in revenue in Q2 2026 — a 33% year-over-year increase — demonstrating the strong growth trajectory that made Zonda's residential data capabilities a natural strategic addition. CoStar is best known for its commercial real estate data platform but has aggressively expanded into residential through Homes.com and other acquisitions, and Zonda adds specific expertise in the new construction segment that is underrepresented in traditional residential databases.

The new construction segment of the residential market is particularly valuable for data analytics because builders operate on longer cycles, make larger capital commitments, and require granular permit, start, and inventory data to manage their supply decisions. Zonda's data is used by homebuilders including D.R. Horton, Lennar, and Pulte Group to calibrate production levels, land acquisition decisions, and community pricing — making it an embedded business-critical tool rather than a discretionary data subscription. For CoStar, this creates a high-retention revenue base similar to its commercial real estate data products, where customer churn is structurally low because removing the data creates operational blind spots for the subscriber.

The key forward signal is how CoStar integrates Zonda's builder relationships with its existing Homes.com consumer-facing residential platform, potentially creating a comprehensive data product that connects builder supply decisions with consumer demand signals. Watch CoStar's Q3 earnings for the first post-close contribution from Zonda and any management commentary on cross-selling opportunities between the Zonda builder network and CoStar's commercial real estate customer base. The macro variable is the US new home construction market's health: elevated mortgage rates have driven a relative shift toward new construction as resale inventory remains constrained, which directly supports Zonda's core data demand from active homebuilders.

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