A cluster of affordable townhouse apartments in northern Concord is expected to get a slight expansion.

The Concord Planning Board gave approval to Concord Housing and Redevelopment Wednesday night to add eight more units at Parmenter Place, where the 25 existing units, built in 2010, are fully booked. The plans would add two- and three-bedroom, two-floor townhouses joined in a single building.

The current units at Parmenter Place are income-restricted, and people looking to live at the complex must fall under certain thresholds. The eight units to be added, however, won’t carry these restrictions, according to Julie Palmeri, execuitve director at Concord Housing.

Slated as “workforce housing,” the new units are intended for residents who earn between 60% and twice the local median income and would help chip away at the housing shortage for people who don’t qualify for income-restricted units but would still struggle to afford market-rate housing, Palmeri said.

With housing and rental costs continuing to climb, “market-rate” rentals and homes for purchase are less and less accessible to the typical resident in New Hampshire.

The typical market-rate monthly rent for a two-bedroom apartment in the state is more than $1700, and an hourly worker must be paid nearly $33 per hour, or more than $68,000 per year, to afford it, according to a recent report from the National Low Income Housing Coalition.

A $1,000,000 earmark from Congress will cover around a quarter of the costs of the expansion, Palmeri said.

Eligible tenants for the existing units at Parmenter Place are those making less than 60% of the local median income, or $46,560 for a single person and $66,480 annually for a three-person household, according to Concord Housing’s website. Some units are set aside for those making less than 50% of the median or, $38,800 for an individual and $55,400 for a four-person household. While applicants must meet the income-requirements, rent is not federally subsidized.

Parmenter Road runs west uphill off of Route 3, near the intersection where North State Street becomes Fisherville Road. The Fisherville area has been a hub for townhouse-style housing developments lately, with two neighboring market-rate projects coming up fast in

Catherine McLaughlin can be reached at cmclaughlin@cmonitor.com. You can subscribe to her Concord newsletter The City Beat at concordmonitor.com.

Editor’s note: This story was updated to include financing details for the expanded phase of Parmenter Place.