TL;DR
CoStar Group is acquiring Zonda, the leading new-home construction data and marketplace platform, for $800 million in cash. The deal fills the last gap in CoStar’s real estate data empire, which already spans commercial, multifamily, residential resale, and spatial data through more than 40 acquisitions totalling $7.3 billion.
CoStar Group has agreed to acquire Zonda, the leading provider of new-home construction data, homebuilder software, and residential real estate marketplaces, for $800 million in cash. The deal, announced on Thursday, is expected to close in the second half of 2026 and will be accretive to adjusted earnings per share in its first full year.
Zonda serves more than 3,000 customers across the homebuilding ecosystem, including many of the largest residential builders, developers, suppliers, and lenders in North America. Its platform covers the full lifecycle of new-home development, from land acquisition and construction forecasting to community marketing and online marketplaces, tracking more than 500 housing metrics.
Filling the new-construction gap
CoStar has spent the past 15 years assembling what is arguably the most comprehensive real estate information platform in the world. Its CoStar Suite dominates commercial real estate research. Like other data platform operators consolidating their markets, the company has expanded methodically through acquisitions, completing more than 40 deals for approximately $7.3 billion over that period.
Apartments.com now generates $1.1 billion in annual revenue. Homes.com, the company’s residential brokerage marketplace, has grown subscribers by 337% since the first quarter of 2024 and claims to be the second-largest and fastest-growing residential real estate marketplace in the United States. CoStar completed its $1.6 billion acquisition of Matterport, the 3D digital twin and AI company, in February 2025.
The pattern is clear. CoStar covered commercial real estate through its flagship product, multifamily rentals through Apartments.com, residential resale through Homes.com and Matterport, and the physical built environment through Matterport’s spatial data. New-home construction was the remaining gap. Zonda fills it.
What Zonda actually does
Zonda was created through a 2018 merger of Hanley Wood, a B2B information services company serving the US residential construction industry, and Meyers Research, a provider of real-time market data for homebuilders. Private equity firm MidOcean Partners orchestrated the combination and rebranded it as Zonda in 2020. The $800 million sale to CoStar represents the kind of PE exit that has become typical in the SaaS and data platform sector, where specialised vertical data companies are built through roll-ups and sold to larger platforms.
Zonda’s three core products are subscription-based data and intelligence covering the new-home market, online marketplaces for new homes in the US and Canada, and a suite of software tools for virtual home evaluation including visualisation, customisation, and tours. The data side tracks everything from lot availability and permit activity to pricing trends and absorption rates at the community level.
CoStar’s financial position
CoStar reported first-quarter 2026 revenue of $897 million, up 23% year on year, and expects full-year revenue of $3.8 billion, an 18% increase over 2025. Adjusted EBITDA is projected to reach $770 million, an 83% increase from 2025 and a 20% margin. The company has the balance sheet to absorb an $800 million cash deal without significant strain.
The stock, however, has not reflected the operational momentum. CoStar shares have declined roughly 49% over the past six months, a drop driven partly by heavy investment spending on Homes.com and partly by broader market scepticism about the timeline to profitability for the residential business. CEO Andy Florance has been buying shares on the open market, purchasing more than 70,000 shares at prices between $34.67 and $36.00 earlier this year.
The data monopoly question
With Zonda, CoStar will hold dominant or leading data positions across every major segment of the US real estate market. Proptech startups building AI-powered tools for real estate development, valuation, or investment will increasingly find that the underlying data they need flows through CoStar’s pipes.
That consolidation carries the same dynamics seen in other data-platform markets. A single operator controlling the reference data for an industry can set pricing, shape how participants see their own market, and create switching costs that entrench its position. CoStar’s pitch is that integration creates value: homebuilders using Zonda data will be able to list on Homes.com, track competitor pricing through CoStar analytics, and market to renters through Apartments.com, all within one ecosystem.
Whether that integration delivers value or simply concentrates pricing power will depend on execution. For now, CoStar has spent $800 million to ensure that the next generation of real estate intelligence runs on its platform, not someone else’s.
