Looking for a new office space right in the heart of downtown Portsmouth?

Located in the heart of downtown Portsmouth, 104 Congress Street offers small professional office suites on the 2nd and 4th floors—ideal for solo practitioners, startups, or small teams seeking a central location. These suites feature natural light, historic charm, and easy access to the city’s best restaurants, shops, and services. The building is professionally managed and positioned just steps from Market Square with nearby municipal parking and easy access to I-95. A great option for businesses looking for a convenient and affordable downtown presence.
Highlights:
- Small Office Suites Available
- 2nd & 4th Floor Options
- Lots of Natural Light
- Move-in-Ready
- Downtown Location
- Near Vibrant Mix of Shops and Dining
Tenants also receive a complimentary Corporate Membership to The Music Hall Members Club, offering access to an inviting gathering space open Tuesday through Saturday at 4:00 p.m., an ideal setting to host clients or to enjoy Portsmouth’s vibrant arts scene after work.
Property Details
- Building Size: 15,544+ square feet
- Year Built: Circa 1820
- Stories: 4
- Access: Main building access on Congress Street
- Elevator: Yes
- Signage: Available on interior directory & tenant doors
- Utilities: Municipal water & sewer
2nd and 4th Floor Units Available!
Click each floor plan below to see full view.

Want to Learn More?
Please view the full Kearsarge House listing packet below.
The Music Hall is partnering with the Boulos Company, with representation by Caitlin Burke and Austin Stebbins. If you or someone in your network would like to learn more or schedule a tour, please don’t hesitate to reach out to Caitlin at cburke@boulos.com.
