It finally happened. On July 1, HB 631 took effect and New Hampshire's commercial zoning map quietly became a housing map. In municipalities the Census Bureau classifies as urban areas, multifamily and mixed-use projects on commercially zoned land are now permitted by right wherever adequate infrastructure exists. No rezoning, no variance, just site plan review. HB 1010 took effect the same day, spelling out what planning boards can and cannot ask for. A third bill, HB 1588, is still sitting on Governor Ayotte's desk. But before anyone redraws the Seacoast skyline, Somersworth's planning office has already pointed out that the new law may not apply there at all. More on that below.
On the rent side, the summer market is doing what it usually does: absorbing. Active listings fell in all four core cities since our June 15 snapshot, with Dover down from roughly 319 to 272 and Rochester down from 137 to 116. Rents ticked up in three of four cities. Portsmouth 1-bedrooms hit $2,382, a new high for this tracker. Rochester 1-bedrooms rose to $1,308, Dover edged up to $1,865, and Somersworth held flat at $1,976.
Rent by Unit Type & Active Supply
| City | Studio | 1-BR | 2-BR | 3-BR | Active Listings |
|---|---|---|---|---|---|
| Portsmouth | $1,937 | $2,382 | $2,706 | $2,968 | ~341 |
| Dover | $1,371 | $1,865 | $2,118 | $3,091 | ~272 |
| Somersworth | $1,335 | $1,976 | $2,069 | $3,007 | ~154 |
| Rochester | $997 | $1,308 | $1,829 | $3,031 | ~116 |
All rent and listing data sourced from Apartments.com (data updated July 1, 2026; listing counts as of July 11, 2026). Averages reflect currently listed units and may shift as inventory changes.
- HB 631 is live, and the practical change is speed. Qualifying commercial parcels can now go residential with site plan approval alone, skipping the rezoning and variance process that kills project timelines. Municipalities keep some levers: they can require ground-floor retail in new buildings, restrict development near incompatible industrial uses, and the infrastructure test (roads, water, sewer) still has to be met. The adaptive reuse provision may matter most for existing owners. A commercial or mixed-use building can convert to apartments without meeting current setback, height, or frontage rules as long as the building's footprint stays the same. If you own a tired storefront or office building on Central Ave, Woodbury Ave, or the Milton Road corridor, the conversion math got simpler ten days ago.
- Somersworth is the local proof that the statute is not a blank check. The city's planning director told the Granite State News Collaborative that HB 631 does not apply to Somersworth because its zoning is combined commercial/industrial, a category the law treats differently, and parts of those corridors lack sewer and water anyway. Every Seacoast town will have its own version of this wrinkle. Before you assume a parcel qualifies, check the specific zone designation and utility availability, not just the statute. And watch HB 1588: if Ayotte signs it, municipalities gain clearer authority on parking requirements and site plan review standards, plus a new tool to finance infrastructure through special assessment districts.
- Supply tightened in all four cities heading into the September 1 cycle. Dover shed roughly 47 active listings in under a month, Rochester and Somersworth each lost about 20, and Portsmouth slipped to 341. Tightening supply with firm rents is the setup landlords want for fall leases. If you have a unit turning over in August or September, listing it now puts you in front of the UNH and travel-nurse wave while competing inventory shrinks. Rochester remains the value story: 1-bedrooms at $1,308 and the city actively recruiting downtown redevelopment, with the Care Pharmacy site on South Main Street now under agreement with a private developer.