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Third-Floor Office Unit
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159 Middle Street, Portsmouth, NH 03801

Portsmouth, NH

Space SizeContact for details
Days on Market215

Property Features for 159 Middle Street

General Information

Property type Commercial Lease
Property subtype Other
Zoning Business
Standard status Active

Utilities

Sewer type Public Sewer
Water source Public

Amenities

heat
electric
common area cleaning
parking
kitchenette area

Building Details

Year built 1850
Listing Agency: Samonas Realty, LLC
Listed By: John Samonas
Added: Feb 5 Changed: Sep 2 Last Checked: Sep 8 at 10:06AM
MLS# 5075877

Copyright © 2026 PrimeMLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

Investment Insights

Based on property information with market context.

This office unit occupies the third floor of an 1850 building at 159 Middle Street in Portsmouth. Access is by stairs, and the space includes a kitchenette area along with the building’s original woodwork and detailed trim. The property accommodates a professional office environment with attorneys, therapists, and physicians among the occupants.

The location is in downtown Portsmouth, within walking distance of downtown activities. Public water and public sewer serve the building. Heat and electric are included, as are cleaning services for common areas and parking. The office is available immediately.

Key Highlights

  • Third‑floor office unit with walk‑up access
  • Heat and electric included
  • Common‑area cleaning included

Property Analytics

Current Use

Mintleaf Marketing Advertising Agency Upton & Hatfield, LLP Law Firm

Suggested Use

Top Pick (Bike/Boat/Book/etc) Store Locksmith Food Market Pet Grooming Service Pharmacy Grocery & Convenience Store

Score = modeled unmet demand for each use within ~1 mi (higher = bigger opportunity). Zoning and permitted uses should be independently verified with local authorities.

Lease Details

Multi-tenant
Tenancy
Yes
Utilities to site
NNN (Triple Net)
Lease Type

Location Intelligence

Trade Area within ½ mile

2,843
Businesses Nearby

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

Lease Benchmarks for Portsmouth, NH

$18.66 /SF/Yr
Avg Asking Price
$1.11–$37 /SF/Yr
Price Range
9,856 SF
Avg Space Size

Vacancy Rate% for Office in Northeast region

13.1% 2019
15.4% 2020
17.6% 2021
19.1% 2022
20.2% 2023
20.9% 2024
19.9% 2025
Rey
Questions? Ask Rey
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Frequently Asked Questions

What type of property is this?
Office units - Downtown workspace with shared-area services, on-site parking, and a kitchenette.
Where is this office units located?
The property is located at 159 Middle Street Portsmouth, NH.
What are key features of this property?
This property features: Third‑floor office unit with walk‑up access; Heat and electric included; Common‑area cleaning included
More about this property
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