Merrimack County

Merrimack County prices median homes at $486,268 against median rents of $2,062, producing a gross rent-to-price ratio of 0.051, or annualized just under 5.1%. The modeled cap rate comes in at 3.31%, and the all-in cash-on-cash return at a 20% down payment and 6.85% financing works out to negative 12.97%, with estimated monthly cash flow of negative $1,209. Those numbers place Merrimack firmly on the appreciation end of the spectrum. The 3.08% year-over-year home price gain and an appreciation score of 80 out of 100 confirm that the market has been rewarding equity holders, not cash-flow operators. The affordability index of 31 and an affordability score of 31 out of 100 tell you entry is not cheap, and that constraint alone tends to sustain rental demand even as it punishes leveraged yields.

The only buyer this market pencils for out of the gate is someone who can absorb negative cash flow as a cost of equity accumulation, specifically an appreciation-oriented investor with a multi-year horizon and enough liquidity to carry that negative $1,209 monthly gap without stress. A pure cash-flow buyer has no business here at current prices and rates: a cap rate of 3.31% does not service the debt, and the math does not close unless rents move materially or prices paid come in well below the median. A value-add operator could potentially improve the picture by buying distressed assets below the $486,268 median and forcing appreciation or rent growth, but the county's affordability score of 31 signals that the rent ceiling is constrained by what local incomes can support, so there is a limit to how far forced rents can travel.

Property taxes in New Hampshire are the single most important line item to model before you buy anything in this state. The state-average effective rate used here is 2.18%, flagged as very high, and it translates to an estimated $10,601 in annual property tax on a $486,268 purchase, or roughly $884 per month before you touch insurance. Add the estimated $93 monthly in insurance (annualized at $1,118) and combined tax and insurance runs $977 per month, which is already included in the $722 estimated expenses figure feeding the cash-flow model. That 2.18% rate deserves its own line on every underwrite you build for this county. The caveat is real: 2.18% is a state-average estimate sourced from Tax Foundation 2024 data, and New Hampshire assesses at the municipality level, so actual rates in Concord, Bow, Penacook, or Henniker will each differ, sometimes materially, and you should pull the current municipal tax rate for any specific target before you close.

Comparing Merrimack to its neighbors clarifies where it sits in the regional hierarchy. Strafford County carries almost an identical median home price ($485,977) but a slightly better rent-to-price ratio of 0.0513 versus Merrimack's 0.0509, and it scores 56 overall versus Merrimack's 53, making Strafford a modestly more efficient market for the same capital outlay. Grafton County is the standout on yield mechanics, posting a rent-to-price ratio of 0.0594 and an overall score of 60, both meaningfully better than Merrimack, at a lower median price of $413,099. Hillsborough County prices at $503,490 with a ratio of 0.0490 and scores 55, which is slightly better overall but worse on yield. Rockingham County is the most expensive of the group at $599,250, carries the weakest rent-to-price ratio at 0.0473, and scores 54 overall, making it the hardest market to justify on any income-oriented thesis. Coos County, at a median of $258,134, is in a different price category entirely, though no rent data was available for comparison. The case for choosing Merrimack over these alternatives comes down to one thing: if your thesis is New Hampshire appreciation within commuting distance of Concord and the county seat's economic base, Merrimack's 80 appreciation score leads the group that has score data. If yield is the priority, Grafton is the cleaner choice numerically, and Strafford is a reasonable substitute at the same price point.