Commercial for Sale: 40 Congress Street, Portsmouth, NH 03801

$12,500,000
$12,500,000
40 Congress Street, Portsmouth, NH 03801
$12,500,000
Remove from
FavoritesAdd to
Favorites		 Add to
Trip Map		 Hide Share or
Email
Price:
$12,500,000
Est. payment: Skip to Mortgage Calculator

Get Pre-Approved

Type Commercial
Year Built 1878
City Portsmouth
County Rockingham
MLS 5084657
Status Active
DOM 90 days
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.

Lot & Building Features

Utilities Gas On-Site
Sewer Public
Tax Year 2026
Water Public
Basement Description Finished

Price History of 40 Congress Street, Portsmouth, NH

Date Name Price Difference
04/21/2026 Listing Price $12,500,000 N/A
*Information provided by REWS for your reference only. The accuracy of this information cannot be verified and is not guaranteed.

Open new tab for directions to this property
Map of 40 Congress Street, Portsmouth, NH

Location Map Street View

Inquire About This Property

Listed by The Boulos Company, Kent White 603-427-1333
Photo of
$
20%
1%
6.75%
$
$
$
Monthly Payment
Principal & Interest
Monthly Taxes
Monthly HOA
Monthly Home Ins.
Monthly PMI
Browse By Area

40 Congress Street (MLS #5084657) is a commercial listing located in Portsmouth, NH. This property was listed on 04/21/2026 and has been priced for sale at $12,500,000.

Nearby zip codes are 03833, 03870, 03903, 03904 and 03940. This property neighbors other cities such as Eliot, Kittery, New Castle, Newington and Rye.

PrimeMLS

Listing Last updated . Some properties which appear for sale on this web site may subsequently have sold or may no longer be available. Walk Score map and data provided by Walk Score. Google map provided by Google. Bing map provided by Microsoft Corporation.

All information provided is deemed reliable but is not guaranteed and should be independently verified.

Listing information courtesy of: The Boulos Company

Copyright 2026 PrimeMLS, Inc. All rights reserved. This information is deemed reliable, but not guaranteed. The data relating to real estate displayed on this display comes in part from the IDX Program of PrimeMLS. The information being provided is for consumers. personal, non- commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated 07/20/2026