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$10,000,000 -$2,500,000 (-20%) Price Reduced

  • For Sale
  • Active
  • Commercial Investment
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Located in the heart of downtown Portsmouth, 40 Congress Street offers a rare opportunity to own a boutique commercial asset in one of New England's most dynamic and historic markets. The 22,601± SF property sits on a 0.09± acre parcel and is zoned CD5 (Character District 5), allowing for a variety of commercial, office, and mixed-use uses including a possible residential conversion on the upper floors. Positioned within Portsmouth's vibrant Downtown Historic District and just steps from Market Square, the property benefits from exceptional walkability, strong surrounding demographics, and limited supply. 40 Congress Street offers a well-located asset with versatile use potential and strong long-term value. For more information, a signed NDA is required.

Full Property Details for 40 Congress Street

General

  • Price: $10,000,000
  • Taxes: (2026)
  • Status: Active
  • Type: Commercial Investment
  • Source: PrimeMLS
  • MLS ID: 5084657
  • Updated: 9/25/2026
  • Added to Site: 158 day(s) ago

Location

  • County: Rockingham

Utilities

  • Sewer: Public

Structural Information

  • Basement Entrance: Walk-up
  • Basement Desc.: Finished
  • Finished Total: 22,601 Sq. Ft.
  • Year Built: 1878

Lot Features

  • Frontage: Yes Road Frontage
  • Zoning: CD5

Financial Considerations

  • Tax Year: 2026

Listed by The Boulos Company, Kent White

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Listed by The Boulos Company, Kent White

Listing agent

— 40 Congress Street —

  • Kent White

    The Boulos Company

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 40 Congress Street

School District:Portsmouth School District, Portsmouth, NH
NameGradesDistance
Little Harbour School
50 Clough Drive, Portsmouth, NH 03801
K-50.7 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 40 Congress Street Get Price Alerts and Save Property

Date
Details
Price
Change
Source
9/25/2026
Price Reduced
$10,000,000
-20%
MLS
4/21/2026
Listed
$12,500,000
—
MLS
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 40 Congress Street

Year
Property Taxes
Change
Tax Assessment
Change
2025
$64,030
3%
$5,563,000
—
2024
$62,194
-23%
$5,563,000
12%
2023
$80,356
6%
$4,981,800
—
2022
$75,723
1%
$4,981,800
—
2021
$74,876
2%
$4,981,800
—
2020
$73,232
-1%
$4,981,800
1%
2019
$73,649
4%
$4,956,200
11%
2018
$70,735
3%
$4,465,600
—
2017
$68,681
—
$4,465,600
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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NMLS#: 1598647

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Listed by The Boulos Company, Kent White

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40 Congress Street, Portsmouth, NH 03801 (MLS# 5084657) is a Commercial Investment property. 40 Congress Street is currently listed for $10,000,000 and was received on April 21, 2026. Want to learn more about 40 Congress Street? Do you have questions about finding other Commercial Investment real estate for sale in Portsmouth? You can browse all Portsmouth real estate or contact a Coldwell Banker agent to request more information.

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