Mercer (IL) Investor Pulse Report (2025-Q4)

In Mercer County, landlords hold a significant 20.3% share of the Single-Family Residential market, with a total of 1,109 properties.

The market is overwhelmingly dominated by individual investors, who own 1,058 properties, accounting for 95.4% of the entire investor portfolio. In contrast, company-owned properties number just 58, or 5.2%.

This individual dominance is also reflected in the entity count, where 1,327 of the 1,376 total landlords are individuals, highlighting a landscape defined by small-scale, local ownership.

A defining characteristic of this market is its complete lack of leverage; 100% of the 1,109 investor-owned properties are held as cash assets, with zero financed properties recorded.

The portfolio is heavily geared towards rental income, with 1,078 properties classified as rented, demonstrating a clear and uniform investment strategy across the county.

Investor purchasing power in Mercer County is substantial, with landlords consistently acquiring properties at a significant discount compared to traditional homeowners.

The most dramatic price gap occurred in Q1 2025, where landlords paid an average of $81,250, a full 37.4% less than the $129,799 paid by homeowners. This represents a cash advantage of $48,549 per transaction.

This trend continued into Q2 2025, with landlords paying $122,611 against the homeowner average of $144,882. This marked a 15.4% discount, saving investors an average of $22,271 per property.

The data reveals a consistent pattern of value-oriented acquisitions by investors, who are able to secure properties for far less than the general market rate, a key component of their investment strategy in the county.

While no landlord purchases were recorded in Q4 2025, price appreciation is evident when comparing the 2020-2023 average price of $84,724 to the 2025 average of $106,067, a 25.2% increase in acquisition costs for investors over that period.

The fourth quarter of 2025 marked a complete standstill for investor acquisitions in Mercer County, with landlords purchasing zero properties out of a total of zero SFR market sales.

This halt in activity means landlords had a 0.0% market share of purchases, a stark contrast to a typically active investor segment that holds over 20% of the county's housing stock.

The freeze was comprehensive, affecting all investor sizes. Mom-and-pop landlords (Tiers 01-04), who constitute the vast majority of owners, recorded zero purchases.

Similarly, there was no activity from mid-size or institutional investors, reflecting a market-wide pause on new capital deployment into residential real estate for the quarter.

Consequently, no new landlords entered the market in Q4 2025, as the typical influx of single-property (Tier 01) buyers was also absent from the transaction data.

The investor landscape in Mercer County is the epitome of a 'mom-and-pop' market, with landlords owning 1-10 properties controlling a staggering 99.7% of all investor-held SFRs.

Single-property landlords form the bedrock of this market, with 864 properties falling into this tier, which alone accounts for 74.0% of investor-owned housing.

The concentration at the small end of the scale is profound: Tiers 01 through 03 (1-5 properties) collectively own 95.4% of the portfolio, totaling 1,014 homes.

In stark contrast, there is no institutional investor footprint in the county. The 1,000+ property tier (Tier 09) holds zero properties, indicating the market is completely driven by local and small-scale capital.

The largest ownership tier present contains only 3 properties (51-100 tier), further cementing the reality that the Mercer County rental market is built and maintained by small, independent operators.

Individual landlords form the foundation of ownership across nearly all portfolio sizes in Mercer County, underscoring their deep-rooted presence in the market.

In the largest segment, single-property landlords, individuals own 832 of the 864 properties (95.6%). This pattern of high individual ownership continues through the two-property (94.9%) and 3-5 property (92.4%) tiers.

Even among landlords with 6-10 properties, individuals maintain a strong majority, owning 45 of the 51 properties in that tier (88.2%).

The only exception to individual dominance is the sparsely populated 51-100 property tier, which contains just three properties in total. Here, companies own two properties (66.7%), marking the technical crossover point, though it represents a negligible portion of the overall market.

This data confirms that company ownership is a fringe element in Mercer County's investor landscape, with individuals driving ownership strategy and composition at every significant scale.

Investor ownership in Mercer County is not evenly distributed, but rather concentrated in specific zip codes. The 61231 area (Aledo) is the largest hub for investor activity by volume, with 241 landlord-owned properties.

While 61231 leads in raw numbers, other zip codes exhibit a much higher density of investor ownership. The 61276 area has the highest penetration rate, where investors own 42.6% of all SFR properties.

The 61442 zip code also stands out with a 39.5% investor ownership rate, with 128 properties held by landlords. This demonstrates a clear strategy of focusing on markets with higher rental demand or acquisition opportunities.

High-volume and high-percentage areas do not always overlap. For example, 61231 has the most properties but a relatively modest 14.8% ownership rate, suggesting investors are more dispersed within a larger housing stock.

This geographical analysis reveals distinct sub-markets within the county, some with saturation-level investor presence and others with more room for growth, guiding where future investment might focus.

A comprehensive analysis of historical transaction dynamics for Mercer County landlords is limited due to the absence of available data on buy and sell volumes over time.

As a result, a definitive buy/sell ratio cannot be calculated, making it impossible to state whether the landlord community as a whole has been in a phase of net acquisition or net disposition in recent years.

The volume of inter-landlord trading, a key indicator of market liquidity and sophistication, also remains unknown. Data on what percentage of purchases come from other landlords is not available.

Similarly, institutional investor (1,000+ tier) transaction patterns cannot be assessed. However, given their 0.0% ownership share, their historical transaction activity is presumed to be nonexistent.

This data gap means that while we can analyze the current state of holdings, the historical velocity and directional flow of the investor market in Mercer County cannot be determined.

The fourth quarter of 2025 was marked by a complete lack of transactional activity in Mercer County's investor market. Landlords participated in zero of the zero total SFR transactions, for a 0.0% share.

This inactivity was uniform across all investor sizes. Mom-and-pop landlords (Tiers 01-04), who dominate the ownership landscape, recorded zero purchases or sales during the period.

Correspondingly, there were no transactions by mid-size or institutional investors, reinforcing the observation of a market-wide pause.

With no purchases, the average purchase price for every tier was $0. This prevents any analysis of pricing strategies or discounts between small and large investors for Q4 2025.

The level of inter-landlord trading was also zero, as no properties were bought or sold between investors, indicating a period of extreme illiquidity in the local rental market.