In June, New Hampshire's housing market reached a record high, with median home prices reaching $538,000—the highest in the state’s history. 

Last month, Merrimack County saw a median home price of $492,500, while Rockingham County topped the list with a median of $685,000. Coos County reported the lowest median home price at $303,500, but it was a 43 percent increase from the previous year.

According to the New Hampshire Association of REALTORS, this surge has further exacerbated the affordability crisis. 

The NHAR's latest data indicates that the affordability index has plummeted to its lowest point since tracking began in 2005.

In March 2013, the median household income in New Hampshire exceeded twice the amount necessary to purchase a median-priced single-family home. Today, that same income falls short, covering only about half of what is required.

"It's a simple supply and demand issue, with too little supply to meet the demand," said NHAR President Joanie McIntire in a statement. "We still believe that restrictive zoning is a fundamental source of the problem, and we hope the legislature continues to consider the housing crisis a priority when it reconvenes next year."

Despite some positive signs, such as a year-over-year increase in inventory—15 percent in April, 34 percent in May, and 30 percent in June—the market remains highly constrained. 

Current listings barely are above 2,000 homes, a stark contrast to the more than 14,000 homes once available in New Hampshire that helped maintain a balanced market.