Costar Group, Inc. (CSGP) Stock Analysis and Metrics

Costar

NASDAQ: CSGP

$27.66 ▲ +0.52 (+1.90%)

At close: Jul 24, 2026 · 3:59 PM UTC

Financial Ratios

Market Cap11.08 Bn

P/E451.97

P/S3.25

Div. Yield0.00

ROIC (Qtr)0.00

Total Debt (Qtr)1.00 Bn

Revenue Growth (1y) (Qtr)22.54

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About

CoStar Group Inc is a leading provider of online real estate marketplaces information analytics and 3D digital twin technology in the property markets. The company digitizes real estate data to help professionals and consumers discover properties insights and connections that improve business decisions. It operates a standardized platform that combines a proprietary database research services and web based tools for leasing sales and marketing activities.

Revenue is generated primarily through subscription based licenses for access to its database analytics and marketplace services. The company also earns fees from transaction based services such as premium listings data capture for 3D twins and auction proceeds from its real estate exchange platform. Advertising and marketing services offered to property owners and agents contribute additional income.

The company operates through the following segments: Commercial Real Estate and Residential Real Estate.

• The Commercial Real Estate segment provides subscription based access to a comprehensive property database leasing sales tenant and owner data market analytics and benchmarking tools. It also operates the LoopNet marketing platform the BizBuySell business marketplace the Ten X auction platform and offers Matterport 3D capture services and related software.

• The Residential Real Estate segment runs consumer focused sites such as Apartments com Homes com and Land com that aggregate rental and for sale listings. It sells marketing leads and advertising to agents owners and property managers and offers AI powered search tools and 3D virtual tours to enhance the user experience.

CoStar Group holds a strong position in the real estate information industry due to its large proprietary database extensive research team and integrated technology platform. Competitors include other online listing services data providers and software firms but the company differentiates itself through the depth and accuracy of its data the breadth of its product suite and its use of artificial intelligence to improve efficiency and insights.

The company serves a diverse set of customers that includes property owners real estate agents brokers developers lenders investors property managers government agencies and professionals in design construction and hospitality. Specific customer names are not disclosed in the filing but the user base spans corporate institutions small businesses and individual professionals across multiple countries.

Investment Thesis

▲ Bull case

CoStar Group, Inc. is positioned to capitalize on the transformative potential of Homes.com, which delivered a 58% year-over-year revenue increase to $26 million in Q1 2026 and is on track to hit the $550 million net investment target for 2026. The platform’s business model is validated by extraordinary subscriber returns, with homes.com members earning an average of $36,400 more in commissions in their first year against an average subscription cost of $3,400—an 11-times return on investment. This ROI is even stronger for lower-earning agents, who saw pre-membership earnings of $26,000 jump to $82,000 on average. With 35,175 agent subscribers (76% on annual contracts) and a rapidly growing sales force of 570 reps, the company is building momentum that will drive ARPU expansion and pricing power, especially as it begins raising subscription fees for new customers on May 1, 2026. The integration of homes.com rentals with Apartments.com—already driving over 10% of Apartments.com’s traffic in 2025—creates a powerful network effect that will accelerate monetization across the residential segment, which is expected to reach profitability in Q2 2026.
CoStar Group, Inc.’s acquisition of Zonda for $800 million in cash represents a strategic masterstroke that extends its leadership into the $1 trillion new home construction market, a segment materially larger than the annual rent rolls of institutional apartments and offices it has successfully monetized. Zonda’s proprietary lot-level database, AI-driven platform, and 104% net customer retention provide deep integration into builder workflows for land acquisition, development planning, and sales operations, creating immediate cross-sell opportunities across CoStar’s commercial, residential, multifamily, lending, and analytics businesses. The combination of Zonda’s Envision visualization capabilities with Matterport’s spatial technology will unlock richer digital experiences for builders and consumers, enhancing how new construction homes are marketed and discovered online. This acquisition is expected to be accretive to adjusted EPS in the first full year of ownership and will strengthen CoStar’s position as the only pan-European CRE data and analytics platform while accelerating its expansion into Australia with CoStar and LoopNet launches planned for Q3 and Q4 2026.
CoStar Group, Inc. is leveraging AI to drive structural efficiency and margin expansion across its portfolio, with Homes AI users spending roughly four times longer on-site than conventional search users and submitting seven times as many leads. The launch of Apartments AI—a pioneering conversational search experience built on the same technology as Homes AI—will deepen renter engagement and deliver industry-high-quality leads ahead of the June Apartmentalize trade show. Internally, the company is deploying multiple AI agents to accelerate customer onboarding, support, and automation of repeatable professional services work, directly contributing to the Q1 2026 adjusted EBITDA of $132 million, which doubled year-over-year and came in 26% above the midpoint of guidance. These AI-driven efficiencies, combined with productivity gains from a maturing sales force hired throughout 2025, are enabling margin expansion that supports the reaffirmed full-year 2026 revenue guidance of $3.78 billion to $3.82 billion and the increased adjusted EBITDA guidance range of $780 million to $820 million—a full percentage point increase in margin at the midpoint.
CoStar Group, Inc.’s international expansion is accelerating beyond core markets, with CoStar UK revenue up 25% and net new bookings up 44% year-over-year in Q1 2026, supported by new land registry lease modules and the recollapse of a primary competitor. CoStar France launches in Q2 2026, targeting 32,000 French CRE professionals from the Business Immo acquisition to build the only pan-European CRE data and analytics platform. In Australia, the company is rapidly building proprietary property data with a local research team approaching 100 people, with CoStar and LoopNet launches planned for Q3 and Q4 2026. Domain Australia delivered strong Q1 results with revenue of $68 million and sustained elevated audience volume, while OnTheMarket eclipsed Zoopla as the UK’s number two portal by inventory and now has more new-home listings than Rightmove. These international initiatives are creating diversified growth engines that reduce reliance on any single geography and position the company to capture long-term structural shifts in global real estate digitization.

CoStar Group, Inc. is positioned to capitalize on the transformative potential of Homes.com, which delivered a 58% year-over-year revenue increase to $26 million in Q1 2026 and is on track to hit the $550 million net investment target for 2026. The platform’s business model is validated by extraordinary subscriber returns, with homes.com members earning an average of $36,400 more in commissions in their first year against an average subscription cost of $3,400—an 11-times return on investment. This ROI is even stronger for lower-earning agents, who saw pre-membership earnings of $26,000 jump to $82,000 on average. With 35,175 agent subscribers (76% on annual contracts) and a rapidly growing sales force of 570 reps, the company is building momentum that will drive ARPU expansion and pricing power, especially as it begins raising subscription fees for new customers on May 1, 2026. The integration of homes.com rentals with Apartments.com—already driving over 10% of Apartments.com’s traffic in 2025—creates a powerful network effect that will accelerate monetization across the residential segment, which is expected to reach profitability in Q2 2026.
CoStar Group, Inc.’s acquisition of Zonda for $800 million in cash represents a strategic masterstroke that extends its leadership into the $1 trillion new home construction market, a segment materially larger than the annual rent rolls of institutional apartments and offices it has successfully monetized. Zonda’s proprietary lot-level database, AI-driven platform, and 104% net customer retention provide deep integration into builder workflows for land acquisition, development planning, and sales operations, creating immediate cross-sell opportunities across CoStar’s commercial, residential, multifamily, lending, and analytics businesses. The combination of Zonda’s Envision visualization capabilities with Matterport’s spatial technology will unlock richer digital experiences for builders and consumers, enhancing how new construction homes are marketed and discovered online. This acquisition is expected to be accretive to adjusted EPS in the first full year of ownership and will strengthen CoStar’s position as the only pan-European CRE data and analytics platform while accelerating its expansion into Australia with CoStar and LoopNet launches planned for Q3 and Q4 2026.
CoStar Group, Inc. is leveraging AI to drive structural efficiency and margin expansion across its portfolio, with Homes AI users spending roughly four times longer on-site than conventional search users and submitting seven times as many leads. The launch of Apartments AI—a pioneering conversational search experience built on the same technology as Homes AI—will deepen renter engagement and deliver industry-high-quality leads ahead of the June Apartmentalize trade show. Internally, the company is deploying multiple AI agents to accelerate customer onboarding, support, and automation of repeatable professional services work, directly contributing to the Q1 2026 adjusted EBITDA of $132 million, which doubled year-over-year and came in 26% above the midpoint of guidance. These AI-driven efficiencies, combined with productivity gains from a maturing sales force hired throughout 2025, are enabling margin expansion that supports the reaffirmed full-year 2026 revenue guidance of $3.78 billion to $3.82 billion and the increased adjusted EBITDA guidance range of $780 million to $820 million—a full percentage point increase in margin at the midpoint.
CoStar Group, Inc.’s international expansion is accelerating beyond core markets, with CoStar UK revenue up 25% and net new bookings up 44% year-over-year in Q1 2026, supported by new land registry lease modules and the recollapse of a primary competitor. CoStar France launches in Q2 2026, targeting 32,000 French CRE professionals from the Business Immo acquisition to build the only pan-European CRE data and analytics platform. In Australia, the company is rapidly building proprietary property data with a local research team approaching 100 people, with CoStar and LoopNet launches planned for Q3 and Q4 2026. Domain Australia delivered strong Q1 results with revenue of $68 million and sustained elevated audience volume, while OnTheMarket eclipsed Zoopla as the UK’s number two portal by inventory and now has more new-home listings than Rightmove. These international initiatives are creating diversified growth engines that reduce reliance on any single geography and position the company to capture long-term structural shifts in global real estate digitization.

▼ Bear case

CoStar Group, Inc. faces significant execution risk in scaling its homes.com business despite strong early metrics, as the sales force remains predominantly rookie with limited tenure—Florance acknowledged it is “unprecedented to have that many salespeople with that little tenure” given the group launched only a year or so ago. While field sales productivity is improving, the inside sales team still requires significant pitch tightening and service refinement, with Florance admitting “the product is currently underpriced” and that they “need to be bolder about that pricing.” The company’s plan to raise subscription fees for new customers on May 1, 2026, risks slowing member acquisition growth at a critical juncture, especially as the sales force is still in post-rookie status and not yet fully productive. Although the ROI data for homes.com members is compelling, it is based on a 12-month analysis window that excludes significant rental marketing value and may understate churn risk if agents fail to sustain commission gains beyond the first year. The company’s reliance on this model to justify aggressive investment and pricing increases could backfire if agent retention or satisfaction declines, particularly as the sales force scales rapidly without proportional gains in experience or effectiveness.
CoStar Group, Inc.’s residential segment remains unprofitable and dependent on continued losses to fund growth, with Q1 2026 adjusted EBITDA at negative $29 million despite residential revenue growing 32% year-over-year to $425 million. While management expects the segment to reach profitability in Q2 2026, this timeline is contingent on sustained ARPU growth from homes.com and pricing power from asset-based pricing on LoopNet—both of which are unproven at scale. The residential business is heavily weighted toward lower-margin, high-growth investments in homes.com and international expansion, which are dragging down overall segment profitability. Apartments.com’s revenue growth moderated to 10% year-over-year in Q1 2026, and while Florance attributes this to seasonal patterns and sales force ramp, the sequential deceleration raises concerns about whether the platform has matured into a lower-growth, steady-state business. The company’s guidance assumes continued double-digit growth in residential revenue for the full year (32% to 34% year-over-year for Q2 2026), but if homes.com fails to deliver pricing power or if Apartments.com growth stagnates, the residential segment could remain a persistent drag on consolidated margins, forcing either prolonged losses or a strategic retreat from high-investment initiatives.
CoStar Group, Inc.’s aggressive capital allocation strategy—including the $1.5 billion share repurchase program and the $800 million Zonda acquisition—creates financial strain that could limit flexibility if growth slows or macroeconomic headwinds emerge. The company repurchased 11.4 million shares for $505 million in Q1 2026 alone and expects to spend $700 million on buybacks for the full year, while simultaneously funding a $550 million net investment in homes.com and integrating Zonda. This level of cash outflow increases vulnerability to downturns in key markets, such as the U.S. office sector, where vacancy is expected to remain steady at 14% through 2026 per CoStar’s own forecast, or the multifamily market, where vacancy is projected to rise to 8.8% by year-end 2026 before easing to 8.4% in 2027. If rental demand remains soft—as evidenced by Google data showing overall rental search demand soft and Zillow’s unique visitors declining for 15 consecutive months—then the company’s reliance on residential growth to offset commercial cyclicality could prove misplaced. The burden of funding both share buybacks and high-growth investments may force difficult trade-offs if revenue growth fails to meet the low- to mid-teens targets embedded in its financial framework.
CoStar Group, Inc.’s international expansion, while promising, carries substantial execution and integration risks that are not being adequately addressed in management’s commentary. The launch of CoStar France in Q2 2026 assumes seamless cross-selling into the 32,000 French CRE professionals from the Business Immo acquisition, but there is no discussion of cultural adaptation, local competition, or regulatory hurdles specific to the French market. Similarly, the plan to launch CoStar and LoopNet in Australia in Q3 and Q4 2026 relies on a local research team approaching 100 people to build proprietary property data, yet the Australian market is described as “highly cyclical” with Q1 always seasonally soft, and Domain discontinued revenue from spam ads because it was “not materially profitable.” The company’s optimism about network effects from LoopNet Europe—where average monthly unique visitors more than doubled to over 900,000—fails to address whether this growth is sustainable or if it is being driven by temporary promotional activity. Without clear metrics on customer acquisition cost, retention, or monetization efficiency in these new markets, the international push risks becoming a costly distraction that dilutes focus from core U.S. operations where the majority of revenue and profitability currently reside.

CoStar Group, Inc. faces significant execution risk in scaling its homes.com business despite strong early metrics, as the sales force remains predominantly rookie with limited tenure—Florance acknowledged it is “unprecedented to have that many salespeople with that little tenure” given the group launched only a year or so ago. While field sales productivity is improving, the inside sales team still requires significant pitch tightening and service refinement, with Florance admitting “the product is currently underpriced” and that they “need to be bolder about that pricing.” The company’s plan to raise subscription fees for new customers on May 1, 2026, risks slowing member acquisition growth at a critical juncture, especially as the sales force is still in post-rookie status and not yet fully productive. Although the ROI data for homes.com members is compelling, it is based on a 12-month analysis window that excludes significant rental marketing value and may understate churn risk if agents fail to sustain commission gains beyond the first year. The company’s reliance on this model to justify aggressive investment and pricing increases could backfire if agent retention or satisfaction declines, particularly as the sales force scales rapidly without proportional gains in experience or effectiveness.
CoStar Group, Inc.’s residential segment remains unprofitable and dependent on continued losses to fund growth, with Q1 2026 adjusted EBITDA at negative $29 million despite residential revenue growing 32% year-over-year to $425 million. While management expects the segment to reach profitability in Q2 2026, this timeline is contingent on sustained ARPU growth from homes.com and pricing power from asset-based pricing on LoopNet—both of which are unproven at scale. The residential business is heavily weighted toward lower-margin, high-growth investments in homes.com and international expansion, which are dragging down overall segment profitability. Apartments.com’s revenue growth moderated to 10% year-over-year in Q1 2026, and while Florance attributes this to seasonal patterns and sales force ramp, the sequential deceleration raises concerns about whether the platform has matured into a lower-growth, steady-state business. The company’s guidance assumes continued double-digit growth in residential revenue for the full year (32% to 34% year-over-year for Q2 2026), but if homes.com fails to deliver pricing power or if Apartments.com growth stagnates, the residential segment could remain a persistent drag on consolidated margins, forcing either prolonged losses or a strategic retreat from high-investment initiatives.
CoStar Group, Inc.’s aggressive capital allocation strategy—including the $1.5 billion share repurchase program and the $800 million Zonda acquisition—creates financial strain that could limit flexibility if growth slows or macroeconomic headwinds emerge. The company repurchased 11.4 million shares for $505 million in Q1 2026 alone and expects to spend $700 million on buybacks for the full year, while simultaneously funding a $550 million net investment in homes.com and integrating Zonda. This level of cash outflow increases vulnerability to downturns in key markets, such as the U.S. office sector, where vacancy is expected to remain steady at 14% through 2026 per CoStar’s own forecast, or the multifamily market, where vacancy is projected to rise to 8.8% by year-end 2026 before easing to 8.4% in 2027. If rental demand remains soft—as evidenced by Google data showing overall rental search demand soft and Zillow’s unique visitors declining for 15 consecutive months—then the company’s reliance on residential growth to offset commercial cyclicality could prove misplaced. The burden of funding both share buybacks and high-growth investments may force difficult trade-offs if revenue growth fails to meet the low- to mid-teens targets embedded in its financial framework.
CoStar Group, Inc.’s international expansion, while promising, carries substantial execution and integration risks that are not being adequately addressed in management’s commentary. The launch of CoStar France in Q2 2026 assumes seamless cross-selling into the 32,000 French CRE professionals from the Business Immo acquisition, but there is no discussion of cultural adaptation, local competition, or regulatory hurdles specific to the French market. Similarly, the plan to launch CoStar and LoopNet in Australia in Q3 and Q4 2026 relies on a local research team approaching 100 people to build proprietary property data, yet the Australian market is described as “highly cyclical” with Q1 always seasonally soft, and Domain discontinued revenue from spam ads because it was “not materially profitable.” The company’s optimism about network effects from LoopNet Europe—where average monthly unique visitors more than doubled to over 900,000—fails to address whether this growth is sustainable or if it is being driven by temporary promotional activity. Without clear metrics on customer acquisition cost, retention, or monetization efficiency in these new markets, the international push risks becoming a costly distraction that dilutes focus from core U.S. operations where the majority of revenue and profitability currently reside.

Segments Breakdown of Revenue (2025)

Peer Comparison

Companies in the Real Estate Services

S.No.	Ticker	Company	Market Cap	P/E	P/S	Total Debt (Qtr)
1	CIGI	Colliers International Group Inc.	4,798.15 Bn	0.00 Mn	0.00	1.87 Bn
2	IHS	IHS Holding Ltd	60.96 Bn	94.22 Mn	140.69	2.81 Bn
3	BEKE	KE Holdings Inc.	53.48 Bn	0.00 Mn	4.18	0.08 Bn
4	CBRE	Cbre Group, Inc.	39.71 Bn	0.00 Mn	0.94	7.88 Bn
5	JLL	Jones Lang Lasalle Inc	14.96 Bn	0.00 Mn	0.56	0.80 Bn
6	CSGP	Costar Group, Inc.	11.08 Bn	0.00 Mn	3.25	1.00 Bn
7	COMP	Compass, Inc.	7.92 Bn	0.00 Mn	0.95	3.14 Bn
8	FSV	FirstService Corp	6.01 Bn	0.00 Mn	2.10	1.25 Bn

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Investment Thesis

Segments Breakdown of Revenue (2025)

Segments Breakdown of Revenue (2025)

Peer Comparison

Research Tools

Developers

About

Investment Thesis

Segments Breakdown of Revenue (2025)

Segments Breakdown of Revenue (2025)

Peer Comparison

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