CoStar Group (CSGP) is extending its European reach by launching its commercial real estate intelligence platform in France and agreeing to acquire about a 30% stake in Italian marketplace Wikicasa, moves that refocus attention on the stock.

Despite the France launch and Wikicasa stake, CoStar Group’s share price return is still down sharply, with a year to date share price decline of 54.33% and a 1 year total shareholder return decline of 63.47%, signalling pressure on sentiment even as new international growth options emerge.

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With CoStar Group’s share price under pressure, a sizeable intrinsic value discount flagged and new European expansion in motion, the key question is simple: is this a genuine mispricing or is the market already factoring in future growth?

Most Popular Narrative: 37.8% Undervalued

CoStar Group’s most followed valuation narrative places fair value at $48.25 versus a last close of $30.00, framing the current drop as a sizable gap to that estimate.

Continued digitalization and demand for high-quality, data-driven real estate platforms are driving significant user growth, engagement, and record net new bookings across CoStar's core and expansion businesses, supporting ongoing double-digit revenue growth and higher recurring earnings.

Want to see how this growth story supports a much higher price tag? The narrative highlights rising margins, faster earnings and a richer future profit multiple.

Result: Fair Value of $48.25 (UNDERVALUED)

However, there are still clear pressure points for CoStar Group, including intense residential portal competition and the risk that higher Homes.com spending fails to translate into stronger margins.

Another View: How CoStar Group Screens On Sales Multiples

While the popular narrative focuses on CoStar Group being 37.8% undervalued versus a $48.25 fair value, its current P/S ratio of 3.6x tells a more mixed story. That multiple is higher than the US real estate industry average of 2.7x and above a peer average of 1.5x, which points to a premium price tag rather than a clear bargain.

At the same time, the current 3.6x P/S sits below the 4.1x fair ratio estimate. This suggests room for the multiple to move closer to that level if the market keeps backing CoStar Group’s model. With such conflicting signals between discount and premium, which yardstick do you trust most when you weigh the next step?

Next Steps

With sentiment clearly split between opportunity and risk, it makes sense to move quickly, review the full picture, and decide where you stand using 2 key rewards and 1 important warning sign

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This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.