If you own rental property anywhere near downtown Portsmouth, you've probably noticed the construction crews on Congress Street. The city is replacing sewer, water, and stormwater infrastructure from one end to the other, and the project runs through early June. Short term, it means detours, noise complaints, and tenants asking about parking. Long term, it means the city is building the backbone for higher-density development downtown and along the waterfront corridor.
Rents across the four core Seacoast cities held mostly flat this week. Portsmouth 1-bedrooms averaged $2,330, up slightly from last week's $2,318. Dover ticked up to $1,856. Somersworth stayed put at $1,949, and Rochester at $1,296. The bigger story is supply: Dover now has 356 active listings (up from 373 last week on a net basis, but the composition shifted as Cochecho Waterfront units absorbed), while Rochester edged up to 100 from 99.
Rent by Unit Type & Active Supply
| City | Studio | 1-BR | 2-BR | 3-BR | Active Listings |
|---|---|---|---|---|---|
| Portsmouth | $1,933 | $2,330 | $2,469 | $2,825 | ~353 |
| Dover | $1,338 | $1,856 | $2,094 | $3,237 | ~356 |
| Somersworth | $1,517 | $1,949 | $1,980 | $2,992 | ~194 |
| Rochester | $992 | $1,296 | $1,799 | $2,991 | ~100 |
All rent and listing data sourced from Apartments.com (as of April 20, 2026). Averages reflect currently listed units and may shift as inventory changes.
- The Congress Street rebuild is an infrastructure bet on density. Portsmouth is replacing the entire sewer collection, water distribution, and stormwater system along Congress. The project wraps in early June, and it's designed to handle significantly more capacity than the current system. If you're underwriting anything downtown or in the waterfront corridor, the upgraded infrastructure removes one of the main objections planning boards raise when evaluating higher-density site plans. Co-living and micro-unit projects on Maplewood Ave and Deer Street are targeting late-2026 groundbreaking partly because this work is already underway.
- NHMA is lobbying to amend HB 631 before it takes effect July 1. The Municipal Association wants to let towns decide which commercially zoned parcels actually qualify for multifamily by right, rather than applying the mandate across every parcel with water and sewer. They're also pushing to restore conditional use permit authority for detached ADUs in certain zones. Worth watching: if the amendment passes, some of the parcels currently being priced as future multifamily along Lafayette Road and Woodbury Ave may revert to their prior zoning value. If it doesn't pass, the July 1 deadline stands as is.
- NH relies on property tax more than any other state in the country. An NHPR report from April 10 found that 61% of New Hampshire's local government revenue comes from property taxes. For landlords, this is a PITI reality check: on a $500K property, the tax bill ranges from roughly $5,700 (in a town like Portsmouth at $11.51) to $9,800+ (in a municipality at $19.68, like Dover). The spread between those two rates is the single biggest variable in your monthly carry cost outside of your mortgage rate. Factor it into every acquisition comp you run.