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    Portsmouth, NH Office Buildings for Sale

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    Rye, NH Greenland, NH Hampton, NH North Hampton, NH Stratham, NH Kittery, ME Newington, NH Eliot, ME
    Historic Office Building
    Updated: Dec 15, 2025
    Historic Office Building

    144 Washington Street, Portsmouth, NH 03801

    $3,300,000
    0.25 AC lot
    1747 Federal‑style office property with original architectural details
    0.25‑acre parcel at Hancock and Washington Streets in Portsmouth
    Professional office configuration with a private third‑floor office
    Views toward Strawberry Banke Historic Museum, Prescott Park, and the Piscataqua River
    Off‑street parking with space identified for a garage or carriage house
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    Historic Portsmouth Office Building For Sale
    Updated: Dec 15, 2025
    Historic Portsmouth Office Building For Sale

    144 Washington Street, Portsmouth, NH 03801

    $3,300,000
    3,034 sqft
    Landmark Federal‑style residence in Portsmouth's historic Puddle Dock area.
    Sweeping views of Strawberry Banke, Prescott Park, and the Piscataqua River.
    One of the largest privately owned parcels in Portsmouth's South End with off‑street parking and room for garage/carriage house.
    Five‑minute walk to Market Square.
    Original architectural details: moldings, eight‑panel doors, and dental moldings.
    View details
    Bank and Office Building
    Bank and Office Building

    40 Congress St, Portsmouth, NH 03801

    $10,000,000

    For-sale bank and office building located at 40 Congress Street in Portsmouth, NH.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Based on your search, we've compiled 76 Potential Opportunities for your consideration. Besides 3 Active listings in Portsmouth, NH, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 69 Off-Market properties to explore as potential leads

    Opportunities in Nearby Cities

    Here are 4 Similar properties we found in Nearby Locations for your consideration.

    Office Building with Laboratory Buildout
    Office Building with Laboratory Buildout

    19 Levesque Dr Unit 3, Eliot, ME 03903

    $1,399,000
    3,420 sqft

    Configured for analytical laboratory and specialized professional uses with scientific equipment and laboratory infrastructure in place.

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    Office Building with Laboratory Buildout
    Office Building with Laboratory Buildout

    19 Levesque Drive, Eliot, ME 03903

    $1,399,000
    3.60 AC lot

    Configured analytical laboratory and professional office property with specialized equipment, central air, and off-street parking.

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    Freestanding Medical Office Building
    Freestanding Medical Office Building

    504 High Street, Somersworth, NH 03878

    $485,000
    1,719 sqft

    Freestanding medical or professional office building with finished reception, private rooms, and flexible workspace.

    View details
    Freestanding Medical Office Building
    Freestanding Medical Office Building

    504 High St, Somersworth, NH 03878

    Contact for pricing
    1,719 sqft

    Freestanding office building with a reception area, multiple private exam rooms or offices, and finished workspace on High Street.

    View details

    Off-Market Properties in Portsmouth, NH

    Consider similar Off-Market properties in Portsmouth, NH. You may contact the owners directly to inquire about their potential intentions to sell. To help you make a strong first impression, we can assist by reaching out to these owners with compelling proposals created using our AI tool.

    53 Grn St
    OFFICE BUILDING

    53 Grn St, Portsmouth, NH 03801-3735

    Estimated value:
    $5,800,000
    20,849 sqft 1.81 AC lot
    View details
    155 Commerce Way
    OFFICE BUILDING

    155 Commerce Way, Portsmouth, NH 03801-3243

    Estimated value:
    $8,440,000
    38,986 sqft 5.49 AC lot
    View details
    118 Pleasant St
    OFFICE BUILDING

    118 Pleasant St, Portsmouth, NH 03801-4507

    Estimated value:
    $1,935,000
    3,186 sqft 0.33 AC lot
    View details
    381 Middle St
    OFFICE BUILDING

    381 Middle St, Portsmouth, NH 03801-5009

    Estimated value:
    $1,680,000
    3,164 sqft 0.24 AC lot
    View details
    93 Pleasant St
    OFFICE BUILDING

    93 Pleasant St, Portsmouth, NH 03801-4504

    Estimated value:
    $2,800,000
    7,591 sqft 0.40 AC lot
    View details
    85 Middle St
    OFFICE BUILDING

    85 Middle St, Portsmouth, NH 03801-4303

    Estimated value:
    $1,085,000
    3,745 sqft 0.16 AC lot
    View details
    111 Maplewood Ave
    OFFICE BUILDING

    111 Maplewood Ave, Portsmouth, NH 03801-3749

    Estimated value:
    $5,155,000
    20,307 sqft 1.34 AC lot
    View details
    125 Daniel St
    OFFICE BUILDING

    125 Daniel St, Portsmouth, NH 03801-3810

    Estimated value:
    $635,000
    2,136 sqft 0.02 AC lot
    View details
    62 Deer St
    OFFICE BUILDING

    62 Deer St, Portsmouth, NH 03801-3718

    Estimated value:
    $1,055,000
    3,627 sqft 0.11 AC lot
    View details
    73 Corporate Dr
    OFFICE BUILDING

    73 Corporate Dr, Portsmouth, NH 03801-2847

    Estimated value:
    $3,040,000
    12,300 sqft
    View details
    378 Islington St
    OFFICE BUILDING

    378 Islington St, Portsmouth, NH 03801-4206

    Estimated value:
    $905,000
    3,260 sqft 0.29 AC lot
    View details
    132 Chapel St
    OFFICE BUILDING

    132 Chapel St, Portsmouth, NH 03801-3848

    Estimated value:
    $565,000
    1,859 sqft 0.05 AC lot
    View details
    350 Us Hwy 1st Byp
    OFFICE BUILDING

    350 Us Hwy 1st Byp, Portsmouth, NH 03801

    Estimated value:
    $1,855,000
    7,676 sqft 1.21 AC lot
    View details
    1150 Sagamore Ave
    OFFICE BUILDING

    1150 Sagamore Ave, Portsmouth, NH 03801-5505

    Estimated value:
    $2,125,000
    8,635 sqft 0.83 AC lot
    View details
    1 Falkland Pl
    OFFICE BUILDING

    1 Falkland Pl, Portsmouth, NH 03801-3977

    Estimated value:
    $1,115,000
    6,058 sqft 0.30 AC lot
    View details
    266 Middle St
    OFFICE BUILDING

    266 Middle St, Portsmouth, NH 03801-5102

    Estimated value:
    $1,025,000
    3,844 sqft 0.16 AC lot
    View details
    210 Commerce Way
    OFFICE BUILDING

    210 Commerce Way, Portsmouth, NH 03801-8200

    Estimated value:
    $12,520,000
    49,480 sqft 4.24 AC lot
    View details
    230 Commerce Way
    OFFICE BUILDING

    230 Commerce Way, Portsmouth, NH 03801-3274

    Estimated value:
    $11,805,000
    49,480 sqft 5.62 AC lot
    View details
    195 Commerce Way
    OFFICE BUILDING

    195 Commerce Way, Portsmouth, NH 03801-3243

    Estimated value:
    $5,090,000
    34,991 sqft 2.82 AC lot
    View details
    82 Ct St
    OFFICE BUILDING

    82 Ct St, Portsmouth, NH 03801-4414

    Estimated value:
    $2,370,000
    8,723 sqft 0.54 AC lot
    View details
    1550 Woodbury Ave
    OFFICE BUILDING

    1550 Woodbury Ave, Portsmouth, NH 03801-3266

    Estimated value:
    $1,535,000
    5,743 sqft 1.00 AC lot
    View details

    Portsmouth, NH Office Buildings Market Trends and Statistics

    Explore 72 office buildings for sale in Portsmouth, NH, showcased through 3 active listings on our real estate platform. These investment opportunities span a total of 3,034 square feet of properties for sale, with an estimated market value of $16,600,000.

    Sale prices for office properties in Portsmouth, NH start at $3,300,000, averaging $5,533,333, and reaching up to $10,000,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

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    Top Commercial Asset Segments

    Commercial property segments ranked by active listings on the market

    Office Units 97
    Medical Office Space 12
    Creative space 11
    Office buildings 8
    Coworking space 2

    Demographics Overview

    Population 23K
    Population Growth (5Y) +2.9%
    Median Household Income $106,520
    College Educated 17.1%

    High-Yield Neighborhoods for Investment

    Identify Portsmouth submarkets with the highest inventory density on the market and evaluate the average listing prices of real estate assets

    Neighborhood Average Price
    03801 $5.5M

    Taxes & Financing

    Tax Rate (average for all types) 1.49%
    Property Tax per SF $10.47 per SF
    Tax Rate vs County Average 0.23 pp below county avg
    Average Loan-to-Value 65.0%

    Listings Trend

    New vs delisted commercial listings in Rockingham County

    New Delisted

    Total CRE Inventory on Market (SF)

    Property Size Breakdown

    The majority of commercial real estate listings in Portsmouth fall within the 100,000+ square foot range.

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