Contact for Price

300 Constitution Avenue Unit: 1, Portsmouth NH, 03801

Built in2013

Property size62,322 sqft

Property typeCommercial

Overview

Active

Listed Oct 7, 2026

Updated 2 days ago

Class A office spaces are available for lease on the 2nd floor. Suite 1 is an open concept 550± SF single room office. Suite 200 is 11,062± SF consisting of 3 conference rooms, 9 offices, kitchen/break room, IT room, and a large open cube area. Modern designer furniture is included in the lease rate (Suite 200 only). Suites feature high ceilings, lots of windows, and elevator access. Other tenants include X5 Home Loans, Global Laminates, TopMark Funding, Concord Electric, Asian Atlantic Industries, and NERACOOS. Located 3.5± miles to downtown Portsmouth, 2.6± miles to I-95, and 0.6± miles to Route 1.

Additional information

MLS^® ID: 5113240

Interior Features

Basement: No

Exterior Features

Lot Size: 5.55 Acres

Other Property Details

Lease Term: Monthly

Listed by Andrew Ward with Colliers International 603-433-7100

Copyright © 2026 PrimeMLS. All rights reserved. This information is deemed reliable, but not guaranteed. The data relating to real estate displayed on this Site comes in part from the IDX Program of PrimeMLS. The information being provided is for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data is refreshed every 3 hours. Listing last updated 3:08 AM UTC on 10/10/2026.