NASDAQ: CSGP · Real Estate Services
CoStar Group (CSGP) fair value: undervalued or overvalued?
As of 28 Sep 2026, Faircurve's model values CoStar Group (CSGP) at $31.02 a share. The stock last closed at $27.38, which puts the model's fair value 13.3% above the price. On the model's bands that reads as Fairly valued.
Revalued . Price is the close of 2 Oct 2026. CoStar Group, Inc.
Faircurve Insights · 28 Sep 2026
CoStar Group, Inc. (CSGP) is a global provider of comprehensive information, sophisticated analytics, and dynamic online marketplace services. It operates in the Real Estate and Real Estate Services sectors.
Faircurve’s model on 28 Sep 2026 found a fair value of $31.02 a share, the midpoint of 2,000 simulations. The previous run on 19 Sep 2026 gave $31.86, so the fair value moved -2.6%. The calibrated range over 63 trading days is $26.03 to $37.82, built from the fair value since there is no live options data. Ranges built this way held the price 60% of the time at this horizon, and the evidence grade is Medium.
The overall quality score is 54 out of 100 against comparable companies. The quality factors include Profitability 25, Earnings quality 90, Growth quality 74, Capital discipline 44, Balance sheet 90, and Stability 0. The model compares it with CBRE Group, Inc. (CBRE) and Marcus & Millichap, Inc. (MMI). The stock's median move around its last 8 earnings reports, ignoring direction, was 6.7%.
Written from the figures on this page for the 28 Sep 2026 valuation and checked by rule before publishing: every number is one printed here, no forecast, no instruction. The price, the gap and the verdict are the page's own and change daily. Not a recommendation.
What price range does the model give CSGP?
The calibrated range for CSGP over 63 trading days is $26.03 to $37.82. There is no live options data for this stock, so the range is built from the fair value and calibrated weekly against realised prices (n = 4,327 past valuations, refreshed 26 Sep 2026). Ranges built this way held the price 60% of the time at this horizon.
The model's own simulated range, from the 20th to the 80th percentile of its runs, is $23.93 to $40.33. In 62% of the simulations the fair value came out above the price the model ran on.
How does CSGP score on business quality?
CoStar Group's overall quality score is 54 out of 100. Each factor below is a score against comparable companies, not a percentile of the metric beside it.
| Factor | Score (0 to 100) | Headline measure | Peer median |
|---|---|---|---|
| ProfitabilityReturn on invested capital against the peer group, with a bonus for an improving trend. | 25 | 0.7%ROIC | 5.5% |
| Earnings qualityHow much of reported profit is cash: free cash flow to net income, and the accrual ratio (the share of earnings that is not cash). | 90 | 4.21xFCF / net income | 1.24x |
| Growth qualityTrailing revenue growth, forward growth from consensus, and the direction of analyst estimate revisions. | 74 | 18.7%Revenue growth, trailing | 10.2% |
| Capital disciplineReinvestment efficiency (capital spending per unit of revenue) and net buybacks. | 44 | 7.9%Net buybacks / market value | 2.0% |
| Balance sheetNet debt to EBITDA and interest coverage. | 90 | -0.27xNet debt / EBITDA | 3.73x |
| StabilityDownside volatility of the EBITDA margin over the last five years. | 0 | 6.7 ptsEBITDA margin downside volatility, 5y | 2.0 pts |
How does CSGP compare with similar companies?
The companies in real estate services closest to CoStar Group in market value, each on the same model and the same date.
| Company | Last close | Model fair value | Gap | Model verdict |
|---|---|---|---|---|
| JLL Jones Lang LaSalle Incorporated | $306.81 | $377.03 | +22.9% | Data under review |
| CBRE CBRE Group, Inc. | $129.58 | $123.30 | -4.8% | Fairly valued |
| CWK Cushman & Wakefield plc | $11.92 | $19.74 | +65.6% | Gap wider than 60% |
| MMI Marcus & Millichap, Inc. | $28.57 | $32.35 | +13.2% | Fairly valued |
When does CSGP report earnings, and how has the stock reacted?
CoStar Group's next earnings report is scheduled for 27 Oct 2026. Companies can move their dates.
How CSGP moved around its last 8 earnings reports
Each move runs from the last close before the report to the first close after it, so it covers companies that report before the open and after the close. The median size across these 8 reports, ignoring direction, was 6.7%.
| Report date | Two session move |
|---|---|
| 28 Jul 2026 | +2.3% |
| 28 Apr 2026 | -5.8% |
| 24 Feb 2026 | -6.5% |
| 28 Oct 2025 | -9.7% |
| 22 Jul 2025 | +7.0% |
| 29 Apr 2025 | -9.3% |
| 18 Feb 2025 | +7.0% |
| 22 Oct 2024 | -5.9% |
CoStar Group at a glance
CoStar Group, Inc. (CSGP) stands as a premier global provider of comprehensive information, sophisticated analytics, and dynamic online marketplace services.
- Market value
- $11.4B
- Sector
- Real Estate
- Industry
- Real Estate Services
- Revenue expected, next twelve months
- $4.1B
- Consensus revenue growth, next fiscal year
- +15.5%
- Analysts with estimates
- 4
- Beta to the US market
- 0.25
- First valued by Faircurve
- 1 May 2026
How the fair value is worked out: the model prices CoStar Group on the value of the whole business, debt included, against the operating profit analysts expect next year (forward EV/EBITDA), runs 2,000 simulations across its inputs and takes the midpoint. The full method is documented here.
What changed in the latest valuation?
On 19 Sep 2026 the model's fair value for CSGP was $31.86. As of 28 Sep 2026 it is $31.02, a change of -2.6%. The model revalues every stock it covers each week, and again after an earnings report.
Questions about CoStar Group's valuation
Is CoStar Group stock undervalued or overvalued?
On Faircurve's model, CSGP reads as Fairly valued as of 28 Sep 2026. The model's fair value is $31.02 a share against a last close of $27.38, a gap of +13.3%.
What is CSGP's fair value?
$31.02 a share as of 28 Sep 2026, the midpoint of 2,000 simulations. The model's own 20th to 80th percentile range is $23.93 to $40.33.
What price range does the model give CSGP?
$26.03 to $37.82 over 63 trading days. Ranges built this way held the price 60% of the time across 4,327 past valuations, refreshed 26 Sep 2026.
When does CoStar Group report earnings next?
The next report is scheduled for 27 Oct 2026. Companies can move their dates.
How much has CSGP moved on past earnings reports?
Across its last 8 reports the median two session move was 6.7%, ignoring direction. The largest was -9.7% around the report of 28 Oct 2025.
How confident is the model in this valuation?
The model's evidence grade for CSGP is medium. The grade looks at how complete the inputs are, how many comparable companies there are and how closely they agree, and how wide the range of outcomes is. It is not a probability that the fair value is right, or that the price reaches it.