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    Portsmouth, NH Office Buildings for Sale

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    Greenland, NH Rye, NH North Hampton, NH Stratham, NH Rollinsford, NH Kittery, ME Hampton, NH Newington, NH
    Waterfront Mixed-Use Property
    Updated: Sep 18, 2025
    Waterfront Mixed-Use Property

    94 Langdon Street, Portsmouth, NH 03801

    $1,000,000
    0.16 AC lot
    0.16‑acre waterfront parcel on the North Mill Pond
    Existing industrial and office buildings
    MRB zoning
    Walking distance to downtown Portsmouth
    Public water and public sewer
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    Historic Downtown Office Building
    Updated: Aug 15
    Historic Downtown Office Building

    40 Congress Street, Portsmouth, NH 03801

    $12,500,000
    22,601 sqft 0.09 AC lot
    22,601± SF office property on a 0.09± acre parcel
    CD5 zoning supports commercial, office, and mixed‑use uses
    Possible residential conversion on the upper floors
    Built in 1878
    Located within Portsmouth’s Downtown Historic District
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    Historic Portsmouth Office Building For Sale
    Historic Portsmouth Office Building For Sale

    144 Washington St, Portsmouth, NH 03801

    $3,300,000

    Landmark Federal-style building in Portsmouth's historic Puddle Dock area.

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    Turn a Listing Into an Investment Snapshot Cap Rate, Potential NOI, Demand score for every listing. Go To Analytics Center
    Bank and Office Building
    Bank and Office Building

    40 Congress Street, Portsmouth, NH 03801

    Contact for pricing

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

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    Historic Office Building with Parking
    Historic Office Building with Parking

    96 Chestnut St, Portsmouth, NH 03801

    Contact for pricing

    Impeccably maintained office building with multiple front-to-back parking spaces and taller-than-average ceilings.

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    Based on your search, we've compiled 76 Potential Opportunities for your consideration. Besides 5 Active listings in Portsmouth, NH, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 67 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.

    Outfitted Laboratory Office Building
    Outfitted Laboratory Office Building

    3-19 Levesque Dr, Eliot, ME 03903

    $1,499,000
    3,420 sqft

    Fully outfitted lab-and-office facility with extensive analytical equipment and infrastructure for specialized testing and research.

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    Fully Outfitted Laboratory Office Building
    Fully Outfitted Laboratory Office Building

    17 levesque Dr, Eliot, ME 03903

    Contact for pricing
    3,420 sqft

    Professional laboratory/office building includes substantial analytical equipment and laboratory infrastructure.

    View details
    12-Unit Mixed-Use Commercial Property
    12-Unit Mixed-Use Commercial Property

    37 Western Avenue #1, Kennebunk, ME 04043

    $950,000
    7,500 sqft

    Mixed-use property with office suites, established tenants, and recent building improvements.

    View details
    Freestanding Office Building
    Freestanding Office Building

    183 Port Road, Kennebunk, ME 04043

    $945,000

    Office property with conference space, bullpen area, on-site parking, and LVB zoning.

    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

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

    155 Commerce Way, Portsmouth, NH 03801-3243

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

    118 Pleasant St, Portsmouth, NH 03801-4507

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

    381 Middle St, Portsmouth, NH 03801-5009

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

    93 Pleasant St, Portsmouth, NH 03801-4504

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

    85 Middle St, Portsmouth, NH 03801-4303

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

    111 Maplewood Ave, Portsmouth, NH 03801-3749

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

    125 Daniel St, Portsmouth, NH 03801-3810

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

    62 Deer St, Portsmouth, NH 03801-3718

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

    73 Corporate Dr, Portsmouth, NH 03801-2847

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

    378 Islington St, Portsmouth, NH 03801-4206

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

    132 Chapel St, Portsmouth, NH 03801-3848

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

    350 Us Hwy 1st Byp, Portsmouth, NH 03801

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

    1150 Sagamore Ave, Portsmouth, NH 03801-5505

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

    1 Falkland Pl, Portsmouth, NH 03801-3977

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

    266 Middle St, Portsmouth, NH 03801-5102

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

    210 Commerce Way, Portsmouth, NH 03801-8200

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

    230 Commerce Way, Portsmouth, NH 03801-3274

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

    195 Commerce Way, Portsmouth, NH 03801-3243

    $5,090,000
    Estimated value
    34,991 sqft 2.82 AC lot
    View details

    Portsmouth, NH Office Buildings Market Trends and Statistics

    Explore 72 office buildings for sale in Portsmouth, NH, showcased through 5 active listings on our real estate platform. These investment opportunities span a total of 22,601 square feet of properties for sale, with an estimated market value of $16,800,000.

    Sale prices for office properties in Portsmouth, NH start at $1,000,000, averaging $5,600,000, and reaching up to $12,500,000 — 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 102
    Medical Office Space 15
    Office buildings 13
    Creative space 10
    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 $3.3M

    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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