DeKalb County

DeKalb County sits at a gross rent-to-price ratio of 0.057, which annualizes to roughly 6.8% before expenses. That sounds passable until you run the full underwrite: at a $294,833 purchase price with 20% down, a 6.85% rate puts your monthly mortgage at $1,546. Add $490 in estimated operating expenses and the $624 monthly tax-and-insurance load, and you're looking at negative $635 in monthly cash flow and a cash-on-cash return of -11.24%. The cap rate clocks in at 3.7%, which is below what most disciplined investors require to compensate for Illinois-specific carry costs. The numbers are not close to cash-flow positive on a standard leveraged acquisition. What partially redeems the county is price appreciation: homes rose 5.03% year-over-year, and the appreciation score of 86 out of 100 places DeKalb firmly toward the appreciation end of the spectrum. This is not a cash-flow market by any honest reading of the model.

Given those figures, the cash-flow buyer who underwrites to monthly positive returns should pass unless they can negotiate a meaningful discount to the $294,833 median, bring a larger down payment to cut the debt service, or identify a specific property running above the $1,400 median rent. A value-add operator buying below market, pushing rents to $1,600-plus, and refinancing at a lower basis could potentially pencil a deal, but the margin for error is thin. The investor best positioned here is someone with a 10-plus year hold horizon who is betting primarily on continued price appreciation, accepts neutral-to-negative cash flow in the early years, and has the liquidity to carry the asset. The affordability index of 67 suggests the market is not stretched by typical buyer standards, which historically supports continued price gains but also limits rent-growth ceiling, since renters have a meaningful path to ownership.

DeKalb County's rental demand is anchored by Northern Illinois University, a major public institution in DeKalb city. University towns generate a structurally captive renter pool: students, faculty, and staff who cycle through on academic timelines and are relatively insensitive to broader job-market fluctuations. That said, university enrollment trends matter here. If enrollment contracts, rental demand weakens in parallel, and vacancy can spike faster than in diversified markets. The broader county population of 100,686 is not large enough to absorb a significant enrollment decline without visible softness in occupancy, so any investor here should track NIU enrollment data annually as a leading indicator.

The tax-and-insurance carry deserves serious attention. Using the state-average effective property tax rate of 2.27%, a county or township rate that may differ, DeKalb generates an estimated $6,693 in annual property taxes on the median-priced home. Combined with $796 in annual insurance, that is $624 per month in taxes and insurance alone before you pay a dollar of mortgage principal or handle a maintenance call. At 2.27%, this is a very high rate by national standards and it is not a rounding error on your underwrite: it single-handedly converts what might be a marginally positive deal in a lower-tax state into a negative-cash-flow position in Illinois. Any investor modeling this market should stress-test the actual township rate against the state average, because the realized figure could be higher or lower, and a delta of even 0.3-0.5 percentage points shifts monthly carry by $75-$125.

The stability score of 50 out of 100 is the data point that deserves the most weight for risk assessment. A university-dependent economy carries concentration risk by definition. A single institution, even a large public one, can face budget pressure, demographic enrollment headwinds, or state funding cuts, any of which flows directly into local rental demand. The county's small population base amplifies this concentration. Investors who dislike single-employer or single-institution dependency should treat this score as a real flag rather than a soft number.

Comparing DeKalb to its neighbors makes the trade-offs clearer. Adams County offers a meaningfully higher gross yield at a 0.067 rent-to-price ratio on a $174,680 median price, and its overall score of 68 edges out DeKalb's 64, suggesting better risk-adjusted cash flow for a buyer prioritizing monthly returns. DuPage County, at $416,478 median and a 0.059 rent-to-price ratio, is priced higher with a marginally better yield than DeKalb and scores 66 overall, making it a closer substitute for appreciation-oriented capital but with deeper liquidity and a more diversified economic base. Bond County at $154,738 is the lowest-priced option in the comparison set, though without rent data it is harder to compare yield directly. Among these neighbors, an investor should choose DeKalb specifically when they want to capture university-driven rental stability, believe in sustained home-price appreciation in a market that has already put up 5% annually, and have the capital structure to absorb negative early-year cash flow. Anyone prioritizing yield-day-one should look hard at Adams County before committing to DeKalb.