Cassia County

Cassia County posts a gross rent-to-price ratio of 4.07% and a cap rate of 2.65%, which places it firmly in appreciation territory rather than cash-flow territory. At a $353,801 median home price and $1,200 median rent, the income simply does not cover the carry. Running a standard 20% down underwrite at 6.85%, the model produces a monthly mortgage of $1,855, estimated expenses of $420, and a negative cash flow of $1,075 per month, translating to a cash-on-cash return of -15.85%. That is not a rounding error or a pessimistic scenario; it is the base case at current prices and rates. The 4.81% year-over-year home price appreciation score of 85 out of 100 nationally tells you what this market is actually rewarding: owners, not landlords collecting rent checks.

The buyer this market suits is an appreciation-oriented investor with reserves deep enough to subsidize negative carry while waiting for equity accumulation, or a long-horizon owner-operator who can buy below median and force appreciation through improvement. A pure cash-flow buyer should stop here; the numbers do not support a buy-and-hold rental strategy at market price without a significant discount to the $353,801 median. A value-add operator who can acquire distressed assets at a 15-20% discount to median and push rents above $1,200 might compress the cash-on-cash loss to something manageable, but the entry math still requires discipline on purchase price. Cassia's affordability index of 54 and overall score of 54 out of 100 (national percentile 33, ranked 528 of 1,000 counties) confirm this is a middle-of-the-pack market overall despite the strong appreciation score.

On carry costs, Cassia benefits from Idaho's low property tax environment. The state-average effective rate is 0.69%, a genuine tailwind worth acknowledging on your underwrite. At the $353,801 purchase price that produces an estimated annual tax of $2,441. Combined with an estimated annual insurance cost of $672, the monthly tax-and-insurance load is approximately $259. That is relatively light for a county at this price point and does not materially offset the cash-flow deficit, but it means the expense side of the ledger is not being inflated by taxes the way it would be in a high-tax state. As always, the 0.69% figure is a state-average estimate from Tax Foundation 2024 data, and actual Cassia County or township rates may differ; pull the county assessor's numbers before closing.

The most concrete risk here is the combination of small population and thin rent demand. At 24,859 residents, Cassia is a small rural county. Thin renter pools mean extended vacancy if a unit turns, and limited comparables make rent growth harder to project with confidence. The negative cash flow profile amplifies that vacancy risk: a single vacant month on a property already bleeding $1,075 per month is a significant capital event. Investors accustomed to metro liquidity should price in longer absorption periods for both rentals and eventual resale.

Compared to its neighbors, Cassia offers the second-lowest median home price of the group, behind only Clark County's $248,917. Twin Falls County, the most liquid comparison at a $367,566 median, posts a rent-to-price ratio of 5.50% versus Cassia's 4.07% and a median rent of $1,684 against Cassia's $1,200. Twin Falls's overall score of 55 edges Cassia's 54, but the real gap is in rental economics: an investor who can buy in Twin Falls gets 143 additional dollars per month in median rent on a purchase price only $13,765 higher. Franklin County at $448,272 is priced above Cassia with no rent data provided to justify the premium, and Benewah County at $325,411 is cheaper but scores 53 overall. Choose Cassia over its neighbors specifically when you are making an appreciation-oriented bet on southern Idaho growth at a price point below Twin Falls, you have the capital to carry negative cash flow, and you are not dependent on rental income to service the debt.