CoStar Group (CSGP) Stock Could Be 38.6% Undervalued After Its Recent Selloff

CoStar Group, Inc.

CoStar Group, Inc.

CSGP

0.00

CoStar Group (CSGP) has drawn fresh attention after a sharp pullback, with the stock down about 11% over the past month and nearly 30% over the past 3 months.

The latest moves extend a poor run for CoStar Group, with the share price down 54.15% year to date and the 1 year total shareholder return declining 62.15%. This points to fading momentum as investors reassess growth prospects and risks.

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With CoStar Group’s share price under pressure despite annual revenue of US$3.4b and net income of US$25m, as well as a sizable gap to analyst targets, investors may now be considering whether this weakness represents a potential opportunity or whether expectations for future performance are already reflected in the current valuation.

Most Popular Narrative: 38.6% Undervalued

Based on the most followed narrative, CoStar Group’s fair value of $49.05 sits well above the last close of $30.12, framing today’s pullback against a more optimistic long term earnings and cash flow outlook.

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.

CoStar's international expansion, through acquisitions (Domain in Australia), pan-European offerings, and market share gains, broadens its addressable market and underpins sustained long-term revenue growth and earnings scalability.

Curious what sits behind that valuation gap for CoStar Group? The narrative leans on a specific mix of accelerating earnings, higher margins and a future earnings multiple that assumes meaningful scale benefits. The precise growth path and profitability ramp are all mapped out there, but only if you read on.

Result: Fair Value of $49.05 (UNDERVALUED)

However, CoStar Group’s story still carries real execution questions, particularly around whether heavy Homes.com spending and rising competition in residential portals could pressure margins and reset expectations again.

Another View: What CoStar Group’s Sales Multiple Is Telling You

While the SWS DCF model flags CoStar Group as undervalued, its current P/S of 3.6x is far above the US Real Estate industry at 2.6x and above the 3.9x fair ratio the market could move towards. That mix of discount and premium leaves a simple question: which signal do you trust more?

NasdaqGS:CSGP P/S Ratio as at Jun 2026
NasdaqGS:CSGP P/S Ratio as at Jun 2026

Next Steps

With mixed signals around CoStar Group’s valuation and outlook, do not wait on others to set the story for you; weigh the upside and downside yourself, and then check the full picture of 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.