• If you are wondering whether CoStar Group at around US$33 a share is starting to look interesting, the key question is what you are really paying for today.
• The stock has been under pressure, with the share price down 5.3% over the past week, 9.4% over the past month, and 49.7% year to date, adding to a 56.0% decline over the last year and 59.6% over five years.
• Recent coverage has focused on how this extended share price slide has reset expectations around the company and sharpened attention on what investors are actually getting for the current market value. News flow has also highlighted broader sector sentiment in real estate and property data services, which helps explain why investors are reassessing the risk and reward trade off here.
• On Simply Wall St’s valuation framework, CoStar Group has a value score of 3 out of 6. The rest of this article will walk through what different valuation methods say about the stock, then finish with a more complete way to think about value that ties those methods together.

Approach 1: CoStar Group Discounted Cash Flow (DCF) Analysis

A Discounted Cash Flow, or DCF, model estimates what a stock could be worth by projecting the cash the company may generate in the future and discounting those cash flows back to today using a required rate of return.

For CoStar Group, the model used is a 2 Stage Free Cash Flow to Equity approach, based on cash flows reported and projected in $. The latest twelve month free cash flow is about $59.5m. Analyst estimates and extrapolations used by Simply Wall St project free cash flow reaching $510.5m in 2026 and $944.7m in 2028, with further extrapolated figures rising to about $1.9b by 2035. These projections are then discounted back to today to estimate what that stream of cash could be worth in present value terms.

This DCF model results in an estimated intrinsic value of about $61.16 per share. Compared with the current share price of around $33, the model indicates the stock is trading at about a 46.0% discount on this framework.

Result: UNDERVALUED

Our Discounted Cash Flow (DCF) analysis suggests CoStar Group is undervalued by 46.0%. Track this in your watchlist or portfolio, or discover 45 more high quality undervalued stocks.

Approach 2: CoStar Group Price vs Sales

For companies where profits may be less informative, the Price to Sales, or P/S, ratio is often a useful way to compare what investors are paying for each dollar of revenue. It is especially handy when earnings are small relative to the company’s size, because sales tend to be more stable than earnings.

Growth expectations and risk still matter, because a higher P/S ratio is usually easier to justify for a company that is expected to grow faster or is seen as lower risk. A lower P/S often reflects lower expected growth or higher perceived risk.

CoStar Group currently trades on a P/S ratio of about 4.0x. That is above the Real Estate industry average of around 2.5x and above the peer average of roughly 1.6x. Simply Wall St’s Fair Ratio for CoStar Group is 4.2x, which is an estimate of what the P/S might be based on factors such as earnings growth, industry, profit margins, market cap and risk.

The Fair Ratio can be more useful than a simple peer or industry comparison because it adjusts for the specific profile of the company rather than treating all stocks as alike. Here, the current 4.0x P/S sits slightly below the 4.2x Fair Ratio. This indicates that, on this metric, the stock appears to be trading below the level suggested by those fundamentals.

Result: UNDERVALUED ON P/S METRIC

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Upgrade Your Decision Making: Choose your CoStar Group Narrative

Earlier it was mentioned that there is an even better way to understand what all these valuation models are really saying, and that is through Narratives. Narratives let you attach a clear story about CoStar Group to the numbers you believe in, from your fair value and revenue path to your expectations for earnings and margins.

A Narrative on Simply Wall St is your own explanation of how you think the business will play out, tied directly to a financial forecast and a fair value. Instead of just seeing that analysts have a consensus fair value of US$61.42 with targets ranging from US$40.00 to US$100.00, you can see the story that sits behind each of those views.

Within the Community page on Simply Wall St, where millions of investors share ideas, Narratives turn this into an accessible tool. They allow you to compare your fair value for CoStar Group with the current share price and decide whether that gap suggests the stock looks attractive or expensive for your own assumptions, while the platform automatically refreshes each Narrative when new earnings, news or guidance are added.

For CoStar Group, for example, one investor might build a bullish Narrative around Homes.com, international portals and AI tools and arrive at a fair value near US$105.00. Another might focus on marketing spend, competition and residential execution risk and land closer to US$40.00, with both Narratives updating as fresh data comes through so you can see which story currently lines up closer to your view.

Do you think there's more to the story for CoStar Group? Head over to our Community to see what others are saying!

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.