St. Clair (IL) Investor Pulse Report (2025-Q4)

Landlords hold a significant 15.9% share of the single-family housing market in St. Clair County, controlling a total portfolio of 13,854 properties.

Individual, or 'mom-and-pop', investors are the primary force in the local market, owning 8,387 properties (60.5%) compared to the 5,669 properties (40.9%) owned by companies.

The investor landscape is composed of a large base of small operators, with individual landlords (8,978) outnumbering company landlords (3,110) by a ratio of nearly three to one.

Cash is the preferred method of acquisition and holding in St. Clair County, with an overwhelming 74.6% of investor-owned properties (10,338) held free and clear, while only 25.4% (3,516) are financed.

The portfolio is heavily focused on providing rental housing, as indicated by 13,265 properties being rented, which accounts for 95.8% of all investor-owned SFRs in the county.

Investors in St. Clair County acquire properties at a massive discount, paying an average of $117,143 in Q4 2025, which is 55.7% less than the $264,713 paid by traditional homeowners. This reveals a distinct market segment where investors target lower-priced inventory.

The price gap between landlords and homeowners, while substantial, narrowed in the most recent quarter. The Q4 discount of $147,570 is smaller than the gaps observed in Q3 ($182,186 or 63.4%) and Q2 ($173,511 or 62.4%), suggesting a potential shift in market dynamics.

Landlord acquisition prices show a cooling trend from the pandemic-era highs. The Q4 average price of $117,143 is 18.6% lower than the average of $143,937 paid between 2020 and 2023, signaling a potential price correction in the investor submarket.

Throughout 2025, landlords consistently maintained a deep pricing advantage, with the discount never falling below 45.3%. This underscores a strategic focus on acquiring properties well below the median price paid by owner-occupiers.

The pricing data suggests landlords and homeowners operate in almost entirely different segments of the St. Clair County market. The consistent, large gap indicates investors are not directly competing for the same properties as traditional buyers but are instead focusing on distressed or off-market opportunities.

Investor activity represented a significant portion of the St. Clair County market in Q4 2025, with landlords purchasing 263 single-family homes, or 23.8% of all 1,105 sales.

The market's new growth is overwhelmingly driven by small investors, with 129 new single-property landlords entering the market and acquiring 111 homes, which accounts for 41.3% of all investor purchases for the quarter.

Mom-and-pop landlords (portfolios of 1-10 properties) were the dominant force in Q4, responsible for 80.3% of all landlord acquisitions with 216 properties purchased, demonstrating the granular nature of investor buying in the region.

Institutional investors (1,000+ properties) had a negligible impact on the Q4 market, purchasing only 5 properties. This accounts for a mere 1.9% of investor activity and 0.5% of all market sales, challenging narratives of large corporations dominating local housing.

Mid-size landlords (11-1000 properties) also showed modest activity, collectively purchasing 53 properties. Buying power is clearly concentrated at the smallest end of the investor spectrum, with the single-property tier alone responsible for over 41% of acquisitions.

The investor landscape in St. Clair County is defined by small-scale ownership. Mom-and-pop landlords (1-10 properties) control a staggering 85.8% of all investor-owned single-family homes, underscoring their role as the backbone of the rental market.

First-time or single-property landlords represent the largest single segment, owning 7,872 properties. This accounts for 54.8% of the entire investor portfolio, indicating a low barrier to entry and a highly fragmented market structure.

In stark contrast to small landlord dominance, institutional investors (1,000+ properties) have a barely perceptible presence, owning only 72 properties. This represents just 0.5% of the investor-owned market, refuting any notion of a corporate takeover of local housing.

Ownership concentration dissipates rapidly as portfolio size increases. While the smallest four tiers (1-10 properties) hold 85.8% of homes, the next four tiers (11-1000 properties) collectively own just 13.7% of the portfolio.

The data clearly shows that the rental housing supply in St. Clair County is overwhelmingly provided by local, small-portfolio investors, not large, out-of-state corporations. The market structure is highly decentralized.

A clear crossover point exists in portfolio size where ownership structure shifts from individual to corporate. While individuals dominate portfolios of 1-5 properties, companies become the majority owner (60.9%) in the 6-10 property tier.

Individual investors form the foundation of the market, holding a 72.4% majority of single-property portfolios and a 72.9% majority of two-property portfolios. This demonstrates that entry-level investing is primarily an individual pursuit.

As portfolios scale, corporate structures become nearly universal. Company ownership escalates from 60.9% in the 6-10 property tier to an overwhelming 98.0% in the 21-50 property tier, indicating that professionalization is tied to incorporation.

Even among small landlords (3-5 properties), individuals maintain a strong two-thirds majority (66.0%), showing that the 'mom-and-pop' designation is strongly correlated with personal, rather than corporate, ownership.

The largest portfolios are almost exclusively company-owned. Companies own 99.1% of properties in the 51-100 tier and 90.3% in the 101-1,000 tier, highlighting that significant scale in real estate investment requires a corporate framework.

Investor ownership in St. Clair County is geographically concentrated, with a few zip codes dominating the landscape. The 62206 area is the epicenter, containing 2,508 investor-owned properties, which is 18.1% of the entire county's investor portfolio.

The 62206 zip code not only leads in raw count but also boasts the highest investor penetration rate at 45.4%, meaning nearly half of all single-family homes there are investor-owned. This indicates a market heavily skewed towards rental housing.

High investor penetration is a feature of several key areas. Following 62206, the 62204 zip code has a 32.5% ownership rate, and 62205 has a 30.3% rate, identifying a cluster of zip codes where investors play an outsized role.

The top three zip codes by investor property count (62206, 62226, and 62220) collectively hold 4,784 properties. This represents over one-third (34.5%) of all investor-owned SFRs in the county, showcasing significant regional consolidation.

There is a clear distinction between areas of high investor concentration and other parts of the county. For example, while 62206 has a 45.4% rate, 62226 has a much lower rate of 12.7% despite having a high count of investor properties (1,195), highlighting different market dynamics.

Landlords in St. Clair County are in an aggressive accumulation phase, acting as strong net buyers. In Q4 2025, they purchased 312 properties while selling only 139, resulting in a net gain of 173 properties to their portfolios.

The net buying trend has been consistent and robust throughout the year. For all of 2025, landlords acquired 1,301 properties and sold 589, a buy-to-sell ratio of 2.21-to-1 and a net portfolio expansion of 712 homes.

Institutional investors (1,000+ properties) have shifted their strategy from selling to modest buying. After being net sellers in 2024 (net -9 properties), they became slight net buyers in 2025, adding a net total of 3 properties to their holdings.

In the most recent quarter, institutional investors continued their slight accumulation, with 7 purchases against 5 sales. This cautious buying approach contrasts sharply with the broader, more aggressive acquisition strategy of the overall landlord market.

Transaction volume for all landlords shows a slight cooling from a high of 373 buys in Q2 to 312 buys in Q4, but the strong positive net acquisition rate demonstrates continued confidence and capital deployment into the St. Clair County rental market.

Landlords represented a fifth of all market activity in Q4 2025, participating in 312 of the 1,533 total transactions for a market share of 20.4%. This highlights their consistent role in market liquidity.

A distinct pricing pattern emerged among tiers, with the smallest investors paying the highest prices. New, single-property landlords paid an average of $122,303, while large investors in the 101-1,000 tier paid just $36,500, suggesting larger players target more distressed assets.

Small landlords (3-5 properties) are the most active in landlord-to-landlord trading. An impressive 54.9% of their Q4 acquisitions were purchased from other investors, indicating a mature and liquid secondary market for rental properties.

The vast majority of Q4 transaction volume came from mom-and-pop investors (Tiers 01-04), who were responsible for 242 transactions. In contrast, institutional investors (Tier 09) conducted only 7 transactions, a fractional amount of activity.

Interestingly, the largest investors (Tiers 101-1000 and 1000+) sourced 0% of their Q4 purchases from other landlords, suggesting they rely on different acquisition channels, such as off-market deals or direct-from-homeowner sales, unlike their smaller counterparts.