Class A Office
For Sale
Contact for pricing
18 Congress Street, Portsmouth, NH 03801
Leased office condominium in a mixed-use building with elevator service and dedicated structured parking.
Property Size2,424 SF
Price / SF$804.46
Days on Market174
Property Features for 18 Congress Street
General Information
Standard status
Active
Size
2,424 SF
Class
Class A
Total Parking Spaces
1
Elevators
Yes
Property subtype
OFFICE
Net Operating Income
$127,308
Additional Details
Floor
2
Cap Rate
6.5%
Amenities
professional lobby
Building Details
Year Built
2006
Buildings
1
Tenancy
Single
Owner Occupied
No
Listing Agency:
CORE
(207) 484-8258
Listed By:
Andre Rossignol
(207) 484-8258
Source:
Moodyscre
Added: Mar 11
Changed: Aug 29
Last Checked: Aug 29 at 1:03PM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of CORE
Investment Insights
Based on property information with market context.
Suite 207 is a 2,424-square-foot office condominium on the second floor of a mixed-use building completed in 2006. The Class A property includes elevator access, a professional lobby, and one deeded garage parking space. Building operations are managed by the condominium association.
The suite is occupied by O’Brien Energy Resources Corporation under a 10-year Absolute Net lease beginning in April 2026. Contractual rent escalations are set at 3% annually through 2034, and the lease carries a 6.5% cap rate. The property is located at 18 Congress Street in downtown Portsmouth’s Market Square, within walking distance of more than 100 restaurants and retailers as well as the waterfront.
The suite is occupied by O’Brien Energy Resources Corporation under a 10-year Absolute Net lease beginning in April 2026. Contractual rent escalations are set at 3% annually through 2034, and the lease carries a 6.5% cap rate. The property is located at 18 Congress Street in downtown Portsmouth’s Market Square, within walking distance of more than 100 restaurants and retailers as well as the waterfront.
Key Highlights
- 2,424 SF second‑floor office condominium in Suite 207
- Class A mixed‑use building developed in 2006
- 10‑year Absolute Net lease with 3% annual escalations through 2034
Property Analytics
Current Use
Lease Details
Single-tenant
Tenancy
Location Intelligence
Trade Area within ½ mile
2,602
Businesses Nearby
Explore this area
Business Placement
Demographics for 03801, NH
22,767
Population
11,448
Households
2
Avg Household Size
43
Median Age
63%
College-Educated
98%
High-School Grad
23.8 sq mi
ZIP Area
957
Density / Sq Mi
$106,520
Median Household Income
$65,984
Median Earnings
$1,783
Median Rent
$647,500
Median Home Value
Market
Vacancy Rate% for Office in Northeast region
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Office units - Leased office condominium in a mixed-use building with elevator service and dedicated structured parking.
Where is this office units located?
The property is located at 18 Congress Street Portsmouth, NH.
What is the asking price?
The asking price for this property is $1,950,000.
What are key features of this property?
This property features: 2,424 SF second‑floor office condominium in Suite 207; Class A mixed‑use building developed in 2006; 10‑year Absolute Net lease with 3% annual escalations through 2034
