Lake County, IL Cap Rates by Neighborhood

County-Wide Gross Yield: A Number That Misleads

The county-wide gross yield for Lake County sits at 6.74%, derived from a $2,251 median monthly rent against a $400,964 median home price. That figure looks passable on paper. It is not. Once you strip out property taxes, insurance, and maintenance, the actual net yield collapses in a way that makes the 6.74% nearly irrelevant as a decision variable. The sub-market spread is where the real analysis lives.

The gross yield also masks a structural divide: Lake County contains both a $235,000 workforce market in Waukegan and a luxury tier in Lake Forest and Highland Park where prices run well above the county median. Blending those into a single gross yield number produces a figure that accurately describes almost no individual deal in the county.

Property Tax: The Single Largest Yield Killer

Lake County carries an effective residential property tax rate of 2.43%, the highest absolute tax burden in Illinois, which itself ranked second-highest in the nation at 2.07% in 2025. At the county median price of $400,964, that translates to about $9,743 annually in property taxes, close to the brief's reported median of $8,943. Call it $9,000–$9,400 as a working range, or roughly $750–$783 per month.

Run the math on a representative rental at the county median:

• Gross annual rent: $2,251 × 12 = $27,012
• Gross yield: 6.74%
• Property tax alone: ~$9,400/year (2.43% × $400,964)
• Tax as share of gross rent: 34.8%

Before insurance, vacancy, maintenance, or management fees, property taxes consume more than one-third of gross rent on a median-priced Lake County acquisition. A conservative estimate of 1.0% for insurance and 10% for maintenance and vacancy leaves an effective net operating income margin below 55% of gross rent, pushing net yields toward the 3.5%–4.0% range on median-priced assets.

That is a thin spread in a market where financing costs remain elevated. Cash-flow investors entering at or above the county median face a structurally compressed net yield environment.

One additional variable: taxing district variation runs from 2.0% to 3.5% across the county under the Illinois Property Tax Extension Limitation Law. A 3.5% effective rate on the same $400,964 property adds roughly $4,300 more in annual taxes than the 2.0% scenario. District selection is not a detail; it is a core underwriting variable.

Neighborhood-by-Neighborhood Yield Analysis

Waukegan: Highest Gross Yield, Highest Management Load

With a March 2025 median sold price of $235,000, Waukegan sits 41% below the county median. At the same $2,251 county-level median rent (likely conservative given Waukegan's market position, but used here for consistency), gross yield at $235,000 implies a rent-to-price ratio of roughly 11.5% if rents approach county norms, or a more realistic 8%–9% if Waukegan rents trade at a 15%–20% discount to the county figure.

Property taxes recalculate at $235,000 × 2.43% = about $5,711 annually, or $476 per month. That improves the tax burden as a share of gross rent compared to median-priced acquisitions.

The catch is concentrated distress: Waukegan holds 101 of the county's foreclosure properties, giving it both the deepest discount entry points and the highest management intensity. Year-over-year appreciation of 5% in early 2025 is positive but lags the county's 7.7% trend. Experienced value-add investors who can absorb turnaround friction will find the best gross yields here. First-time landlords should go elsewhere.

Winthrop Harbor: Affordable Lakefront with Acceleration

At a December 2024 median of $294,995, Winthrop Harbor offers entry 26% below the county median with 11.4% year-over-year price appreciation, the strongest named sub-market in the brief. Tax burden at $294,995 × 2.43% runs about $7,168 annually.

The appreciation rate suggests the market is moving faster than rent growth, which compresses forward-looking gross yields on new acquisitions. An investor who bought 18 months ago is capturing both the yield and the gain; an investor entering now at $295,000 is buying into an accelerating price trend that narrows the rent-to-price ratio on every future purchase. The lakefront location and below-county-median price suggest continued gentrification momentum, making this a better appreciation play than a cash-flow play.

Grayslake, Libertyville, and Gurnee: Middle-Market Metra Premium

These three communities represent the county's core middle-market hold strategy. Inventory remained tight heading into late 2025, with fewer new listings in all three, sustaining rents and limiting vacancy risk. Proximity to Metra commuter rail across the county's 32 stations broadens the renter pool to Chicago-bound commuters who trade square footage for lower rents than comparable Chicago neighborhoods.

Prices in this corridor likely sit near or above the county median of $400,964, meaning tax burdens track the county average or higher. These are not high-yield sub-markets. They are low-vacancy, lower-turnover markets with predictable appreciation tied to employer proximity (Abbott, AbbVie, Walgreens, and Wintrust Financial are all within commuting reach). Net yields here likely land in the 3.5%–4.5% range after taxes, sustainable only if you underwrite for appreciation rather than cash flow.

Neighborhood Comparison Table

Cap Rate Compression: Prices Are Winning

At the county level, home prices rose 5.96% year-over-year per ZHVI, and the brief's June 2025 closed-sale data showed 7.7% appreciation. Zillow's ZORI-derived rent figure of $2,251 does not reflect equivalent growth. When prices move faster than rents, gross yields compress on new acquisitions. That is the current Lake County dynamic.

Supply sitting at 2.1 months countywide, combined with the rate lock-in effect from 2020–2022 refinancers reluctant to list, keeps upward price pressure intact. New construction activity in the Libertyville, Mundelein, and Vernon Hills corridor is up 8% in 2026, introducing supply risk for nearby rentals within a 2–3 year window. Investors buying in that corridor today should build rent-growth deceleration into their pro forma.

Flood Insurance Adjustment

Flood risk is not a county-wide haircut, but it is a factor for unincorporated parcels and low-lying areas. Unincorporated Lake County residents can qualify for up to a 20% discount on NFIP flood insurance premiums through FEMA's Community Rating System, which modestly improves NOI on floodplain-adjacent properties. Investors underwriting any acquisition near identified flood zones should verify FIRM panel designation before closing and build the discounted premium (not the full premium) into the net yield calculation for unincorporated properties.

Cap Rate Outlook

The DePaul University Institute for Housing Studies projected about 5% price growth and 5.1% higher sales activity for the Chicago metro in 2026. Lake County's employer base adds upside: AbbVie, Flex, Fortune Brands Innovations, and others are actively expanding, and unemployment stood at 4.6% in August 2025. These conditions sustain occupancy and defend against rent softening.

The forward scenario for net cap rates: mild further compression on median-and-above assets as prices continue outrunning rents, modest yield stabilization in distressed Waukegan as that sub-market absorbs investor interest, and a narrowing window on the Winthrop Harbor appreciation trade as prices accelerate toward county norms.

The 2.43% property tax rate is not going away. Illinois PTELL limits levy growth but does not roll it back. Investors who underwrite at today's assessed values and assume flat taxes are taking basis risk on reassessment.

The honest summary: Lake County is an appreciation market with cash-flow characteristics that only work at below-median acquisition prices or in high-distress pockets. Model your specific deal with our investment property calculator before committing to any sub-market here.