CoStar Group Inc (CSGP) Fair Value & Analysis

Real Estate · US · Market cap $12.2B · ISIN US22160N1090

What is CoStar Group Inc really worth?

CoStar Group Inc CSGP · US

Price$31.68

Fair Value$4.64

Upside−85.4% ⚠

Quality52/100

Structural break: The valuation model sees a lasting decline in earnings power for this stock, the confidence band is broken. Treat the target with caution.

A solid business, but trading 583% above our fair value of $4.64.

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Strengths

✓Low debt · generates free cash flow

Risks

!Mixed Growth (revenue 5y +14.4 %/yr)

!Thin margins · 0.7% net margin

!Trails peers (3/15)

!Narrow moat 27/100

!Evidence only low, so the estimate is less certain

!Weak on past: 1 out of 100

!Weak on dividend: 3 out of 100

Evidence: Low Range $3.33 – $8.10

Fair value as of: Aug 31, 2026

From 15 valuation models · updated 5 days ago

Share price +6.3% over the past month.

What runs behind every stock

26 valuation models 8 families, DCF to NCAV 37 quality factors margins, balance sheet, cashflow, debt 6 AI factors moat, what no ratio measures 2,000+ data points verified, per stock, median

69 individual criteria per stock, every one traceable See the method →

What matters now

The price sits above even our optimistic bull case ($8.10). The favourable scenario is already priced in.
The large gap to fair value rests on thin data (low evidence): fewer applicable models and a shorter history. Read it with extra caution.
Solid but not exceptional quality (52/100) and above fair value, neither a clear bargain nor a standout compounder.
A fairly wide model range ($3.33 to $8.10) leaves room in how you read the outcome.

Price vs Fair Value (5 years)

White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Aug 31, 2026.

How to read this chart

60‑month range $27.14 – $99.74 · fair‑value band $3.33 – $8.10 · the $31.68 price screens above the $4.64 fair value. Green steps = our fair value per fiscal year (point-in-time, no hindsight). 1 fiscal year is left out: there the valuation rested on only a fraction of the usual models. Dashed = 300-day average. As of Aug 31, 2026.

Full chart & analysis →

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Analysis

CoStar Group Inc (CSGP) currently trades at $31.68, while our model-based Fair Value estimate is $4.64, implying the stock looks roughly 582.6% overvalued today. The Quality Score stands at 52/100 (solid quality), in the Real Estate sector. Bull case: the Asset-Based group reads highest at a median of $13.67 per share, and 0 of the 15 models we run sit above the $31.68 price. Bear case: the Dividend Discount group reads lowest at $0.9100, and 15 of the 15 models stay below the price. Evidence for this calculation is low.

Over the trailing twelve months, CoStar Group Inc generated revenue of $3.4B at a net margin of 0.7%. Revenue grew 22.5% year over year. It earns a return on equity of 0.3%. The balance sheet holds a net cash position of $589M. Fundamentals as of Aug 31, 2026

Our scenario range runs from $3.33 (bear case) to $8.10 (bull case); at $31.68, the current price sits above that range. Bear and bull are the same models run on conservative and optimistic assumptions (margins, growth, valuation multiples), so a plausible valuation range, not a price target. The share trades about 67% below its 52-week high and 1% above its 52-week low, currently below its 200-day average. For context, the median of 10 Real Estate peers we cover trades at −23% fair-value upside, at −85%, CSGP screens richer than that median.

Fair Value models

This estimate rests on fiscal year 2025 figures, and about 8 months have passed since. In that time the company retained roughly $0.0474 per share, which is 1.0 % of the fair value. The fair value deliberately does not add this in: the models value reported figures, not a projection.

Each model estimates fair value its own way; the Fair Value above is the evidence-weighted, family-balanced blend. Evidence (0–100) measures how completely this model’s inputs are available: well-fed models carry more weight in the blend. The spread across models is intentional, each one stresses a different value driver; dividend models, for instance, come out structurally low when payout is small. Every input is real reported data, nothing guessed.

Note: the current price implies far more future growth than the conservative anchors of our models allow (base growth is deliberately capped, we do not regard such extreme rates as sustainable). Our models are not designed for expectations this high; that is why the individual models scatter extremely ($0.2900 to $13.67). Read the values as a conservative anchor, not as a price target.

Model Bear ⓘBear = the cautious scenario: the same model computed with conservative anchors (lower growth, margins and valuation multiples). Together with Bull it frames a plausible valuation range, not a price target.BaseBull ⓘBull = the optimistic scenario: the same model computed with favourable anchors (higher growth, margins and valuation multiples). Together with Bear it frames a plausible valuation range, not a price target. Evidence

Highest evidence

FCF DCF best evidence $3.32 $4.47 $7.56 79

Growth DCF $3.27 $4.77 $7.53 77

Residual Income $13.63 $12.57 $8.36 76

All 15 models by family

DCF Models

FCF DCF best evidence $3.32 $4.47 $7.56 79

5Y Revenue Exit $2.92 $3.85 $5.35 73

5Y EBITDA Exit $5.90 $10.46 $17.52 73

10Y Revenue Exit $3.00 $4.05 $5.54 67

10Y EBITDA Exit $5.10 $9.40 $17.24 65

Dividend Discount

Gordon GGM $0.5200 $1.08 $1.71 66

DDM Multi-Stage $0.5200 $0.9100 $1.13 67

Multiples

P/S Multiple $0.2200 $0.2900 $0.3600 58

P/B Multiple $0.2200 $0.2900 $0.3600 55

EV/EBITDA $7.12 $8.89 $10.66 67

EV/Revenue $2.73 $3.12 $3.51 54

Asset-Based

NCAV (Graham) $10.20 $13.67 $20.41 54

Growth DCF

Growth DCF $3.27 $4.77 $7.53 77

Rev-Margin DCF $2.92 $3.87 $5.25 73

Economic Profit

Residual Income $13.63 $12.57 $8.36 76

Widest divergence: Asset-Based ($13.67) versus Multiples ($0.2900). Highest evidence: FCF DCF (79).

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Key figures & financial health

P/E ratio 452.6

P/S ratio 0.98 P/E × margin

EPS (TTM) $0.0700 price ÷ EPS = P/E 452.6

Dividend yield 0.2% payout 76.1%

Net margin 0.2% FY2025

Return on equity 0.3% TTM

More key figures

Profitability

Return on assets (EBIT) 2.8% avg 5y

Operating margin 0.3% TTM

Growth

Revenue (TTM) $3.4B TTM

Revenue growth (YoY) +22.5% 3y avg +14.2%

EPS growth (YoY) −25.9%

Balance sheet & cash flow

Free cash flow $41.0M FY2025

Net cash $589M FY2025

Figures from reported company fundamentals · as of Aug 31, 2026. TTM = trailing twelve months.

Quality Score breakdown

Overall quality 52/100

Of which business quality 51 · Market factors (momentum, volatility) 24

Profitability 21

Margins and returns on capital today

Quality Growth 51

Are margins and returns improving?

Cashflow 43

Earnings quality: real cash, not paper profit

Fin. Strength 83

Balance sheet, leverage, solvency risk

Investment 57

Disciplined investing over empire-building

Low Volatility 58

Calm price path (market factor)

Momentum 14

Price trend over the last 3–12 months (market factor)

52W Momentum 4

Distance to the 52-week high (market factor)

Net Issuance 56

Buybacks instead of dilution

Non-valuation factor families (profitability, growth, cashflow, financial strength, momentum …), each academically grounded. Valuation itself sits in the Fair Value and is deliberately excluded here to avoid double-counting.

All values are scores from 0 to 100 (100 = best against fixed, research-based bands), not percentages. The three market factors (momentum, 52-week proximity, low volatility) are displayed but carry zero weight in the headline number: market sentiment is not a business property.

About the company

Full company description

CoStar Group, Inc. provides information, analytics, and online marketplace services to real estate and related business communities in the United States, Australia, Canada, Europe, the Asia Pacific, and Latin America. It offers CoStar Property that provides inventory of office, industrial, retail, multifamily, hospitality, and student housing, and land properties; CoStar Leasing, a data on lease transactions and tools to manage user-entered lease data; CoStar Sales, a database of commercial real estate sales transactions; CoStar Owners provides detailed portfolio information; CoStar Markets to view and report on market and submarket trends; and CoStar Tenant that provides tenant information. The company also provides hospitality benchmarking that allows hotels to measure performance against competitors; Debt Solutions, a tool for lenders to manage loan portfolios and risk; and real estate and lease management technology solutions, such as lease administration, lease accounting, and transaction management services. In addition, it offers Apartamentos.com, an apartment marketing sites; LoopNet.com, a commercial property marketing sites; Homes.com, a home for sale listings site; Ten-X, an online auction platform for commercial real estate; Land.com, a marketplace for rural land sales; and BizBuySell.com, a marketplace for operating businesses and franchises for sale. It serves sales, leasing, and mortgage brokers; property, real estate investment trust, insurance companies, and asset managers; and government agencies, property owners, mortgage-backed security issuers, appraisers, design and construction professionals, pension fund managers, real estate developers, reporters tenant vendors, bankers, building services vendors, mortgage bankers, communications providers, retailers, institutional advisors, hospitality owners, investors, and real estate agents. The company was founded in 1986 and is headquartered in Arlington, Virginia.

Company description, as reported by the company or data provider.

Revenue & earnings trend

FY2021 – FY2025 · reported fiscal years

CoStar Group Inc reported revenue of $3.2B in FY2025 versus $1.9B in FY2021, a compound +13.7%/yr. Reported net income was $7.0M in FY2025, compounding −60.7%/yr from FY2021.

Growth Quality 85/100

Revenue is growing, but margins or cash flow do not fully confirm the trend.

Latest Revenue (FY 2025)

$3.2B

Latest YoY

+18.7%

Avg. revenue growth/yr (3Y) ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump.

+14.2%

Avg. revenue growth/yr (5Y) ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump.

+14.4%

Avg. revenue growth/yr (28Y) ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump.

+24.0%

Value creation/yr (5Y) ⓘEarnings growth per share (CAGR 5 years, adjusted) plus dividend yield: value created per share and year.

−47.0% (−47.2 + 0.2)

Revenue +13.7%/yr

FY21 $1.9B

FY22 $2.2B

FY23 $2.5B

FY24 $2.7B

FY25 $3.2B

Net income −60.7%/yr

FY21 $293M

FY22 $370M

FY23 $375M

FY24 $139M

FY25 $7.0M

Character of growth · EPS growth decomposed (2014-2025) +14.1 % p.a.

Revenue per share +13.1 %

of which total revenue +16.5 % · buybacks/dilution −3.0 %

EBIT margin −11.7 %

Tax rate +1.7 %

Residual (interest, one-offs) +12.4 %

Annual growth per factor. These are factors, not summands: multiplied they give the EPS growth rate, added they do not quite. Start and end points are 3-year averages (details on hover).

CSGP screens 583% overvalued. Compare with CBRE Group →

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CoStar Group Inc · Fair Value
$4.64 −583%Fair Value
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Cite: Fair Value Calculator (2026). "CoStar Group Inc Fair Value". https://www.fairvalue-calculator.com/stock/CSGP

Peer Group

Real Estate Services · 523 stocks

How this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.

Quality Score 51 · Below median

Fair Value upside −85% · Bottom 25%

Return on equity (TTM) 0% · Below median

Return on assets 0% · Bottom 25%

Net margin (TTM) 1% · Below median

Operating margin (TTM) 0% · Bottom 25%

Revenue growth 23% · Top 25%

Dividend yield (TTM) 0.2% · Bottom 25%

Debt / equity 0.12× · Lower than median

Valuation Multiples vs Real Estate Services median · lower = cheaper

P/E (TTM) 452.6× · Pricier than 75% of peers

P/B 1.46× · Pricier than 75% of peers

P/S (TTM) 3.56× · Pricier than median

P/FCF 296.6× · Pricier than 75% of peers

EV/EBITDA 42.0× · Pricier than 75% of peers

PEG 0.11× · Cheaper than 75% of peers

Strength profile in five axes (Snowflake)

Five quick dimensions, each 0 to 100: VALUE (fair-value potential), FUTURE (revenue growth), PAST (return on equity), HEALTH (low debt), DIVIDEND (yield). Green = this stock, grey = typical sector peer.

This stock

Sector peers

VALUE0 · sector 30

FUTURE100 · sector 11

PAST1 · sector 17

HEALTH94 · sector 84

DIVIDEND3 · sector 63

VALUE 0: the price sits above our fair-value range.

Insider activity: 66/100

Values & ESG

Does this company touch areas you may want to avoid? The classification is inferred from sector and industry.

None of the checked exposures detected

Similar stocks

10 more Real Estate Services stocks, each showing price versus our Fair Value estimate (as of Aug 31, 2026).

Stock	Price	Fair Value	vs Fair Value
CBRE Group CBRE	$148.74	$69.47	−53%
Vonovia SE VNA	€19.85	€36.67	+85%
Cellnex Telecom, S.A CLNX	€27.47	€25.46	−7%
KE Holdings BEKE	$17.42	$6.57	−62%
Jones Lang LaSalle Incorporated JLL	$378.01	$290.25	−23%
Swire Properties Limited 1972	HK$24.84	HK$5.12	−79%
China Resources Mixc Lifestyle Services Limited 1209	HK$39.84	HK$34.95	−12%
CapitaLand Investment Limited 9CI	2.66 SGD	0.4900 SGD	−82%
Plaza S.A MALLPLAZA	4,040 CLP	4,571 CLP	+13%
SAGAA SAGAA	kr 170.50	kr 75.55	−56%

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Frequently asked questions

Is CoStar Group Inc (CSGP) overvalued or undervalued?

As of Aug 31, 2026, our model estimates a fair value of $4.64 versus a price of $31.68, about −85% upside (overvalued).

What is the fair value of CSGP?

Our model-based fair value for CoStar Group Inc is $4.64 (as of Aug 31, 2026), built from audited fundamentals. The current price: $31.68.

What is the quality score of CSGP?

CoStar Group Inc has a Quality Score of 52/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.

What is the revenue of CoStar Group Inc (CSGP)?

CoStar Group Inc reported trailing-twelve-month revenue of about $3.4B (latest available figure, as of Aug 31, 2026).

What is the net profit margin of CSGP?

The net profit margin of CoStar Group Inc is about 0.7%, meaning it keeps roughly 0.7% of revenue as net income. Based on the latest reported figures.

Does CoStar Group Inc pay a dividend?

CoStar Group Inc currently shows a dividend yield of about 0.17% relative to its recent price (as of Aug 31, 2026).

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