Charleston County

Charleston County lands at the expensive end of the cash-flow spectrum. At a median home price of $611,188 and median rent of $2,083, the gross rent-to-price ratio sits at 0.041%, which is thin by any buy-and-hold standard. The modeled cap rate comes out at 2.66%, and after financing at 6.85% on a 20% down payment, the numbers produce a monthly cash flow of negative $1,850 and a cash-on-cash return of negative 15.79%. That is not a rounding error or a deal-structure problem; it is the arithmetic reality of buying a $611,000 asset at current rates and renting it for $2,083. The appreciation score of 52 is the highest component in the overall scorecard, while the cash-flow score of 31 and affordability index of 22 confirm where this market sits: firmly on the appreciation end of the spectrum, with cash flow a distant secondary consideration. Home prices moved only 0.23% year-over-year in the most recent data, so even the appreciation thesis is muted at the moment rather than running hot.

This market suits one profile above almost all others: the equity-preservation or appreciation buyer who can tolerate significant monthly carry, is buying with a longer hold horizon, and likely has enough equity from another asset to reduce leverage materially. At 20% down, the cash-on-cash is deeply negative. An investor putting 40% or 50% down changes the monthly picture considerably, though it does not change the cap rate of 2.66%, which reflects the asset's earnings yield independent of financing. Value-add operators can exist here, but the entry price of $611,000 compresses the upside on forced appreciation unless the operator is targeting specific submarkets with meaningful below-market rents. A pure cash-flow buyer has no business in this county at current prices; the numbers do not support that strategy at any reasonable leverage level.

The $464 per month combined tax and insurance estimate is worth holding in your underwrite. South Carolina's state-average effective property tax rate is 0.57%, which the Tax Foundation classifies as low, and at that rate the annual property tax on a $611,000 purchase runs roughly $3,484. Insurance adds another $2,078 annually at the modeled 0.34% rate, producing the $464 monthly figure. That tax rate is a genuine tailwind relative to high-tax states, and it keeps the carry costs from being worse than they already are. Keep in mind these are state-average estimates; actual Charleston County and township rates may differ, so verify at the county assessor before closing. The low tax environment is one of the few cost-side advantages this market offers a landlord.

Concentration risk is real here. A median home price of $611,188 in a county with a median household income of $78,795 produces an affordability index of 22, meaning the typical household can afford roughly 22% of the median-priced home. That gap between incomes and prices is wide, and it means the renter pool that can qualify for a $2,083 rent payment is drawing from households earning well above the county median. If the coastal market softens, both prices and rents could face downward pressure simultaneously, and the investor who bought at $611,000 with a thin cap rate has little margin for either. The 0.23% year-over-year price appreciation suggests that pricing pressure has largely stalled, which narrows the appreciation thesis that justifies taking on the negative carry in the first place.

Compared to the neighboring counties in the dataset, Charleston is operating in an entirely different market tier. Jasper County, the only neighbor with full metrics, prices at $401,192 with a rent-to-price ratio of 0.054%, versus Charleston's 0.041%. That 32% improvement in the gross yield ratio, combined with a $210,000 lower entry price, makes Jasper a meaningfully better cash-flow setup, even though its overall score of 38 is fractionally below Charleston's 39. Marion, Barnwell, Lee, and Hampton counties all come in between $137,000 and $150,000 at the median, which opens up entirely different financing math and cash-flow profiles, though their overall scores of 37 to 40 suggest their own limitations. Choose Charleston over its neighbors only if the investment thesis is specifically tied to the Charleston market's long-term price trajectory, coastal demand dynamics, or a portfolio strategy where appreciation and asset quality matter more than current yield. If cash flow is the primary objective, Jasper County or the lower-priced rural neighbors deserve a closer look first.