CoStar completes $800 million Zonda acquisition to expand into new-home data
CoStar Group completed its $800M acquisition of Zonda, adding new-home data and software. Zonda generated $170M in 2025 revenue with a 23% adjusted EBITDA margin. CoStar aims to integrate Zonda's offerings with its existing property data services, targeting the $400B US new-home market.
How this was made

The 30-second read
Why it matters
The acquisition positions CoStar to capture end‑to‑end data in the new‑home segment, potentially increasing recurring revenue and cross‑sell opportunities across its platforms.
Market read
A material M&A that expands CoStar's addressable market and could drive short‑term stock upside while introducing integration execution risk.
What to watch
Potential antitrust scrutiny or integration cost overruns; Zonda's existing customer retention rates are untested post‑acquisition.
Background
CoStar Group, a leading provider of commercial real‑estate information, has been expanding its portfolio with digital marketplaces and data services.
Ticker impact
CoStar Group completed an $800 million cash acquisition of Zonda, adding construction data and new-home marketplaces.
Short‑term upside pressure on CSGP as investors price in growth synergies; watch for volatility around integration updates.
Large‑scale M&A with clear strategic rationale and disclosed financial terms; market typically reacts positively to such expansions.
Market effects
Adds competitive pressure in real‑estate data and construction‑tech sectors; may spur consolidation among niche data providers.
U.S. residential real‑estate data market sees increased concentration; limited immediate effect outside North America.
Highlights growing importance of construction‑stage data for global property technology platforms.
Counterpoint
Integration risks and cyclical housing market could delay synergies, weighing on CSGP if construction slows.
Key entities
- CompanyCoStar Group
US‑listed real‑estate data provider (NYSE: CSGP).
- CompanyZonda
Construction‑data and new‑home marketplace business acquired for $800 M.




