CoStar just made a massive move. They’re buying Zonda for $800 million. This deal plugs the last hole in their real estate data empire. Now, CoStar controls data across every major real estate sector.

This isn’t just another acquisition. It’s the final piece in a decade-long strategy to dominate real estate information. CoStar already owns massive platforms for commercial properties, apartments, resale homes, and spatial data. But new-home construction? That was the missing link. Not anymore.

Zonda: The New-Home Construction Powerhouse

Zonda isn’t just any company. It’s the king of new-home construction data. Its platform tracks every stage of building—from land acquisition to marketing and sales. Over 3,000 clients use Zonda, including homebuilders, developers, suppliers, and lenders across North America.

• Tracks over 500 housing metrics
• Monitors lot availability and permit activity
• Forecasts construction timelines and pricing trends
• Offers software for virtual home tours and customization
• Hosts online marketplaces for new homes in the US and Canada

Zonda’s roots come from a 2018 merger of two major players in residential construction data. Private equity firm MidOcean Partners built it up and then positioned it for this big sale to CoStar. This is classic tech roll-up strategy—build vertical data leaders, then sell to massive platforms.

CoStar’s Real Estate Data Empire Grows

CoStar didn’t get here by chance. Over 15 years, they bought more than 40 companies for $7.3 billion. Their flagship commercial property database is the industry standard. Apartments.com dominates multifamily rentals. Homes.com is the residential resale powerhouse. And Matterport brings spatial and 3D data into the mix.

Now, with Zonda, CoStar covers new builds too. This makes them the only company with robust data on every major real estate segment:

• Commercial real estate
• Multifamily rentals
• Residential resale
• New-home construction
• Spatial and 3D property data

This comprehensive dataset creates a powerful network effect. Builders using Zonda can list homes on Homes.com. Investors can analyze trends with CoStar’s analytics. Renters can find apartments on Apartments.com. Everything connects in one ecosystem.

What This Means for the Market and Investors

CoStar’s financials show strength. First-quarter 2026 revenue hit $897 million, up 23% year-over-year. Full-year revenue is projected at $3.8 billion, an 18% increase from 2025. Their adjusted EBITDA is expected to jump 83% to $770 million. They have the cash to handle an $800 million deal without strain.

Yet, CoStar’s stock has taken a hit, down nearly 50% in six months. Investors worry about the costs of expanding the residential business and how long it will take to turn a profit there. Still, CEO Andy Florance is confident, buying over 70,000 shares himself this year.

There’s no doubt this deal will shake the real estate data world. CoStar will control the core data pipelines for commercial and residential real estate. Proptech startups building AI tools for development and valuation will rely on CoStar’s data. This creates huge pricing power and high switching costs.

Will CoStar’s integrated ecosystem deliver massive value to users? Or will it simply consolidate pricing power in the market? The answer depends on execution. But one thing is clear: CoStar just raised the bar for real estate data dominance.

Looking Ahead: The Future of Real Estate Data

CoStar’s relentless expansion shows no signs of slowing. They’ve proven that owning comprehensive, high-quality data creates a moat that’s almost impossible to breach. Now, they’re poised to reshape how new-home construction data feeds into the entire real estate industry.

With AI and automation advancing, CoStar’s rich datasets could drive smarter forecasting, pricing models, and virtual home experiences. Imagine homebuyers touring customizable digital twins of new builds before they even break ground.

For investors and real estate pros, this acquisition signals a new era. The data game is bigger and more integrated than ever. And CoStar is sprinting ahead to own it all.