Delaware County

Delaware County sits at a 5.79% gross rent-to-price ratio, which translates to a 3.76% cap rate at the median price point of $362,572. That ratio puts it squarely in appreciation territory rather than cash-flow territory. The model underwrite at 6.85% interest with 20% down produces a monthly mortgage of $1,901 against estimated rent of $1,748, generating negative cash flow before you even count operating expenses. All-in, the tool estimates a $764 monthly shortfall and a cash-on-cash return of -10.99%. Year-over-year home price growth of 2.57% provides some offset on the appreciation side, and the appreciation score of 76 out of 100 is the most compelling number in Delaware's profile. The overall score of 59 and a national percentile rank of 49th confirm this is a middling market from a pure return standpoint, not a standout in either direction.

The negative cash flow is a clear signal: this market does not suit a cash-flow buyer running a standard levered underwrite at current rates. The appreciation score of 76 suggests upside for a longer-hold investor who can tolerate negative carry, can put substantially more than 20% down, or can find assets below the county median. A value-add operator hunting for properties priced below the $362,572 median, then pushing rents toward or above that $1,748 figure, has a path to reducing the bleed. But anyone buying at median price with conventional financing needs to underwrite the carry shortfall as a deliberate cost, not an oversight. The affordability index of 52 and stability score of 50 suggest the demand base is moderate but not bulletproof, which limits how aggressively you can underwrite rent growth.

At 575,312 residents, Delaware is a large, dense suburban county in the Philadelphia metro, which itself is one of the larger employment centers on the East Coast. No specific economic anchors were provided in the underlying data, but the county's sheer population size and proximity to Philadelphia support a degree of rental demand continuity that smaller, more isolated markets cannot claim. That said, the model's stability score of 50 suggests this proximity to a major metro does not fully insulate the county from demand volatility.

The tax and insurance burden is a real line item here. Combined monthly property tax and insurance comes to $535 on a $362,572 asset, using a state-average effective property tax rate of 1.54%. That rate is flagged high, and at 1.54% it deserves its own line on your underwrite because it adds meaningfully to the carry cost beyond the mortgage. On a market where the gross yield is already thin and cash flow is negative, a $535 monthly tax-and-insurance drag before maintenance, vacancy, or management is material. The caveat worth repeating is that 1.54% is a state-average estimate from Tax Foundation 2024 data; the actual county and township rate in Delaware County may differ, so pull the current millage for any specific municipality before finalizing your numbers.

The primary risk here is concentration in one demand driver: suburban Philadelphia spillover. If remote work or structural shifts in Philadelphia's employment base soften demand for suburban housing, Delaware County has limited independent economic identity to fall back on. The affordability score of 52 is low enough that rent growth headroom is constrained, which compounds the cash-flow problem rather than solving it over time. No vacancy or regulatory data was provided, so those risks cannot be quantified here.

Compared to neighboring counties, Delaware holds one meaningful advantage: its rent-to-price ratio of 5.79% beats Montgomery County (5.14%), Franklin County (5.02%), Bucks County (5.33%), and Lancaster County (4.69%). In other words, Delaware is the most favorably priced relative to rents among its immediate peer set. Montgomery County offers a similar appreciation profile at a $473,900 median price, making Delaware the better entry point for the Philadelphia suburban trade. Bucks County has higher absolute rents at $2,246 but also the highest prices at $505,541, and its 5.33% ratio still trails Delaware. Lancaster is the worst ratio in the group at 4.69%, a clear pass for any investor focused on yield. Armstrong County at a $156,968 median price sits in a completely different market segment where capital preservation rather than appreciation is the likely story. Choose Delaware over its neighbors when you are making an appreciation-oriented Philadelphia metro bet and want the best rent-to-price ratio available in that trade, while keeping your entry price well below Bucks or Montgomery.