CoStar Group has finished paying $800 million in cash for Zonda, folding a construction-data and homebuilder-software business with more than 3,000 customers into its residential empire alongside Apartments.com and Homes.com, according to CoStar’s August 21, 2026 announcement. The prize isn’t really the consumer sites NewHomeSource.com and Livabl — it’s Zonda’s proprietary lot-level database tracking land acquisition, construction status and builder operations, which gives CoStar a data foothold earlier in the housing pipeline than any listing platform reaches.
Run the numbers CoStar itself disclosed: Zonda generated about $170 million in 2025 revenue at a 23% adjusted EBITDA margin, per citybiz and HousingWire reporting on the closing. That puts the purchase price at roughly 4.7 times trailing revenue — rich for a subscription data business, even a profitable one, unless CoStar can actually execute the cross-sell it keeps promising.
At nearly five times trailing revenue, CoStar isn’t buying Zonda’s current book of business — it’s buying the option to sell its own analytics and marketplace tools to 3,000 homebuilders who’ve never had to think about CoStar before.
The deal also extends a pattern: CoStar has now stitched together commercial data (CoStar core, LoopNet, Ten-X), multifamily (Apartments.com), single-family resale (Homes.com), spatial imaging (Matterport, acquired 2024) and now new-construction data (Zonda) into one roll-up. Residential revenue already jumped 33% year-over-year to $444 million in Q2 2026, so Zonda’s profitable subscription base is accretive on arrival rather than a turnaround bet. Watch whether CoStar actually ships the promised integration of Zonda’s Envision visualization tools with Matterport’s spatial tech — that’s the synergy story investors will be pricing, not just the data-licensing math.
Zonda has built an exceptional business around information the homebuilding industry relies on every day.
