Portsmouth, NH Office Buildings for Sale

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Greenland, NH Rye, NH North Hampton, NH

Historic Portsmouth Office Building For Sale

$3,300,000

0.25 Acres

Historic Portsmouth Office Building For Sale

144 Washington Street, Portsmouth, NH 03801

Landmark Portsmouth building, ideal for professional offices or business.

Landmark Federal‑style residence in Portsmouth's historic Puddle Dock area with sweeping views.
One of the largest privately owned parcels in Portsmouth's South End with off‑street parking and potential for garage/carriage house.
Prime location: five‑minute walk to Market Square, Portsmouth's cultural epicenter.
Historic architectural details: genuine moldings, original eight‑panel doors, and distinctive dental moldings.
Versatile property suitable for residential or professional use, currently configured as professional offices.

Updated: Dec 15, 2025

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$3,300,000

Historic Portsmouth Office Building For Sale

144 Washington St, Portsmouth, NH 3801

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

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.

Updated: Apr 24

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Based on your search, we've compiled 80 Potential Opportunities for your consideration. Besides 2 Active listings in Portsmouth, NH, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 70 Off-Market properties to explore as potential leads, plus 4 Land Listings that present a potential for development.

Opportunities in Nearby Cities

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

$115,000

528 SF

Dover Office Building For Sale

528 SF office building in Dover, NH for sale.

3-9 Patriot Dr, Dover, NH

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$1,700,000

7,511 SF

Prime Commercial Office Building Dover

Commercial office building in a sought-after location with high visibility.

827 Central Ave, Dover, NH

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High-Traffic Commercial Property For Sale

$2,625,000

13,700 SF

High-Traffic Commercial Property For Sale

98% leased commercial property with professional tenants and ample parking.

191 Elm Street, Salisbury, MA 1952

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$2,625,000

Professional Office Building For Sale

Office building with professional tenants and dedicated parking.

Elm Street 191a, Salisbury, MA 1952

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Potential Development Sites for Consideration

Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

$500,000

4.53 Acres

Londonderry Commercial Land Opportunity

4.53 acre commercial parcel with development potential near I-93.

524R Mammoth Road, Londonderry, NH 03053

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$299,900

4.00 Acres

Commercial Land Route 16

Four-acre commercial land with Route 16 frontage.

829 Route 16, Ossipee, NH 03896

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$490,000

Commercial Vacant Lot For Sale

Vacant commercial lot zoned for general business use.

1579 Washington Street, Braintree, MA 2184

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$490,000

Commercial Vacant Lot For Sale

Vacant commercial lot zoned for general business use.

1579 Washington Street, Braintree, MA 2184

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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 • 20,849 SF

Value Estimation

$5,800,000

53 Grn St, Portsmouth, NH 03801-3735

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155 Commerce Way

OFFICE BUILDING • 38,986 SF

Value Estimation

$8,440,000

155 Commerce Way, Portsmouth, NH 03801-3243

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118 Pleasant St

OFFICE BUILDING • 3,186 SF

Value Estimation

$1,735,000

118 Pleasant St, Portsmouth, NH 03801-4507

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381 Middle St

OFFICE BUILDING • 3,164 SF

Value Estimation

$1,295,000

381 Middle St, Portsmouth, NH 03801-5009

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93 Pleasant St

OFFICE BUILDING • 7,591 SF

Value Estimation

$2,010,000

93 Pleasant St, Portsmouth, NH 03801-4504

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85 Middle St

OFFICE BUILDING • 3,745 SF

Value Estimation

$1,085,000

85 Middle St, Portsmouth, NH 03801-4303

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111 Maplewood Ave

OFFICE BUILDING • 20,307 SF

Value Estimation

$5,155,000

111 Maplewood Ave, Portsmouth, NH 03801-3749

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125 Daniel St

OFFICE BUILDING • 2,136 SF

Value Estimation

$635,000

125 Daniel St, Portsmouth, NH 03801-3810

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62 Deer St

OFFICE BUILDING • 3,627 SF

Value Estimation

$1,055,000

62 Deer St, Portsmouth, NH 03801-3718

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73 Corporate Dr

OFFICE BUILDING • 12,300 SF

Value Estimation

$3,040,000

73 Corporate Dr, Portsmouth, NH 03801-2847

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378 Islington St

OFFICE BUILDING • 3,260 SF

Value Estimation

$905,000

378 Islington St, Portsmouth, NH 03801-4206

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132 Chapel St

OFFICE BUILDING • 1,859 SF

Value Estimation

$565,000

132 Chapel St, Portsmouth, NH 03801-3848

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350 Us Hwy 1st Byp

OFFICE BUILDING • 7,676 SF

Value Estimation

$1,855,000

350 Us Hwy 1st Byp, Portsmouth, NH 03801

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1150 Sagamore Ave

OFFICE BUILDING • 8,635 SF

Value Estimation

$2,125,000

1150 Sagamore Ave, Portsmouth, NH 03801-5505

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1 Falkland Pl

OFFICE BUILDING • 6,058 SF

Value Estimation

$1,115,000

1 Falkland Pl, Portsmouth, NH 03801-3977

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266 Middle St

OFFICE BUILDING • 3,844 SF

Value Estimation

$1,025,000

266 Middle St, Portsmouth, NH 03801-5102

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210 Commerce Way

OFFICE BUILDING • 49,480 SF

Value Estimation

$12,520,000

210 Commerce Way, Portsmouth, NH 03801-8200

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230 Commerce Way

OFFICE BUILDING • 49,480 SF

Value Estimation

$11,805,000

230 Commerce Way, Portsmouth, NH 03801-3274

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195 Commerce Way

OFFICE BUILDING • 34,991 SF

Value Estimation

$5,090,000

195 Commerce Way, Portsmouth, NH 03801-3243

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82 Ct St

OFFICE BUILDING • 8,723 SF

Value Estimation

$2,370,000

82 Ct St, Portsmouth, NH 03801-4414

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1550 Woodbury Ave

OFFICE BUILDING • 5,743 SF

Value Estimation

$1,535,000

1550 Woodbury Ave, Portsmouth, NH 03801-3266

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150 Mirona Rd

OFFICE BUILDING • 3,112 SF

Value Estimation

$905,000

150 Mirona Rd, Portsmouth, NH 03801-5342

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Portsmouth, NH Office Buildings Investment Opportunities Market Analysis

Explore 72 office buildings for sale in Portsmouth, NH on our real estate platform. These investment opportunities span a total of 0 square feet of properties for sale, with an estimated market value of $6,600,000.

Sale prices for office properties in Portsmouth, NH start at $3,300,000, averaging $3,300,000, and reaching up to $3,300,000 — 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

Property Size Breakdown

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

Demographics Overview

Population 23K

Population Growth (5Y) +2.9%

Median Household Income $106,520

College Educated 17.1%

High-Yield Neighborhoods for Strategic Investment

Identify Portsmouth submarkets with the highest inventory density on the market and evaluate the median 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 sq ft

Tax Rate vs County Average 0.23 pp below county avg

Average Loan-to-Value 65.0%

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Portsmouth, NH Office Buildings for Sale

144 Washington Street, Portsmouth, NH 03801

144 Washington St, Portsmouth, NH 3801

Opportunities in Nearby Cities

3-9 Patriot Dr, Dover, NH

827 Central Ave, Dover, NH

191 Elm Street, Salisbury, MA 1952

Elm Street 191a, Salisbury, MA 1952

Potential Development Sites for Consideration

524R Mammoth Road, Londonderry, NH 03053

829 Route 16, Ossipee, NH 03896

1579 Washington Street, Braintree, MA 2184

1579 Washington Street, Braintree, MA 2184

Off-Market Properties in Portsmouth, NH

53 Grn St

155 Commerce Way

118 Pleasant St

381 Middle St

93 Pleasant St

85 Middle St

111 Maplewood Ave

125 Daniel St

62 Deer St

73 Corporate Dr

378 Islington St

132 Chapel St

350 Us Hwy 1st Byp

1150 Sagamore Ave

1 Falkland Pl

266 Middle St

210 Commerce Way

230 Commerce Way

195 Commerce Way

82 Ct St

1550 Woodbury Ave

150 Mirona Rd

Portsmouth, NH Office Buildings Investment Opportunities Market Analysis

Top Commercial Asset Segments

Property Size Breakdown

Demographics Overview

High-Yield Neighborhoods for Strategic Investment

Taxes & Financing

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