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To own CoStar Group, you need to believe its data, marketplaces and AI tools can compound across commercial, residential and international real estate, even while some business lines adjust to softer demand. The Homes.com report on higher prices, fewer sales and more listings, alongside weaker retail construction starts, mainly reinforces how reliant customers are on its information rather than changing the thesis.
The near term swing factor still sits in execution on Homes.com and broader cost discipline after lower 2026 revenue guidance and muted bookings. The biggest risk remains that pressure in multifamily advertising and the Ten X restructuring weighs on revenue longer than expected and prevents margin progress from offsetting slower top line momentum.
The Homes.com September 2026 housing update is the clearest recent data point for that thesis. It shows national median sale prices, lower completed sales and rising inventory in the same snapshot, which underscores why agents, brokers and investors may lean on CoStar Group tools when conditions differ sharply by city and segment.
That kind of granular feed connects directly to the firm’s key catalysts. Management is leaning on tighter expense control, AI products such as Homes AI and CoStar Rent Benchmark, and the early profitability of Homes.com to support earnings quality. If customers keep treating CoStar Group’s data as reference grade through this mixed housing and retail construction backdrop, those initiatives have more room to gain traction.
CoStar Group's narrative projects US$4.8b revenue and US$676.3m earnings by 2029. This assumes 10.8% yearly revenue growth and an earnings increase of about US$602.3m from US$74.0m today.
Those analyst targets effectively sketch out what needs to go right for the story around Homes.com, Apartments.com and the broader data platform to hold together. A move from US$74.0m in earnings to US$676.3m by 2029, along with margin expansion from 2.1% to 14.0%, implies a very different profit profile if the plan plays out.
For you as an investor, the key is less about whether the US$4.8b and US$676.3m figures prove accurate and more about what they imply. The consensus case assumes that CoStar Group can grow into a P/E of 24.9x on those 2029 earnings from a much higher multiple today, while still relying on its data, marketplaces and AI tools to support that step change in profitability.
This is where the housing and retail construction data comes back into focus. If Homes.com continues to provide granular views of selective buyers and uneven pricing, and if CoStar Group’s commercial feeds keep flagging restrained retail supply, then the services tied to that information could support the sort of revenue path analysts have pencilled in. If the underlying markets prove less active than expected or customer budgets tighten further, the gap between the current US$74.0m earnings base and the US$676.3m target becomes harder to close.
Uncover how CoStar Group's fair value indicates a 5% potential upside to its current price before the discount closes.
One alternate view puts CoStar Group’s AI and marketplace push front and center. The most optimistic analysts were modelling revenue of about US$5.2b and earnings of US$837.7m by 2029, assuming faster Homes.com scaling than the consensus. Those projections pre date the latest housing and retail construction data, so opinions may evolve over time.
Explore 4 other CoStar Group fair value estimates, including one that suggests up to 338% upside from the current price!
Disagree with existing narratives? Extraordinary investment returns rarely come from following the herd, so go with your instincts.
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