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    144 Washington St Portsmouth, NH 03801

    Sponsored
    For Sale
    $3,300,000

    Commercial For Sale - Portsmouth, NH

    Lot size:
    0.25 Acres
    Days on Market:
    21
    Last Refresh:
    Jan 6 at 8:06 pm

    Property Features for 144 Washington St

    General Information

    Property type
    Commercial Sale
    Property subtype
    Other
    Standard status
    Active
    Zoning
    MRO
    Rooms
    Basement
    Basement Y/N
    1
    Lot size
    0.25 Acres

    Utilities

    Heating system
    Baseboard, Hot Water (Heating), Natural Gas

    Building Details

    Year built
    1747
    Number of units
    9
    Roof type
    Wood
    Architectural style
    Other

    The Aland Realty Group, LLC (207) 251-4762 [email protected]

    Listing agent Wayne Semprini (603) 501-0463

    Listing date Dec 17, 2025

    MLS# 5072167 Listing URL

    Copyright © 2026 PrimeMLS. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

    Overview

    Historic Portsmouth Office Building For Sale

    The Leonard Cotton House, a Portsmouth landmark with over two centuries of history, is situated in Portsmouth’s historic Puddle Dock area. This Federal-style residence offers views across Strawberry Banke Historic Museum, Prescott Park, and the Piscataqua River. As one of the largest privately owned parcels in Portsmouth’s South End, the 0.25-acre lot includes off-street parking with room to construct a garage or carriage house. Located on the corner of Hancock and Washington Streets, the property is a five-minute walk from Portsmouth’s Market Square. Architectural details include moldings, original eight-panel doors, and dental moldings. The third floor features exposed beams and wide pine floors, creating a private office space. The property has served as law offices for over forty years and is currently configured as professional offices. It is suitable for any business seeking a central Portsmouth location. The zoning is MRO.
    Property Profile Insight Report Location Intelligence

    Current Use by Public Records

    Durbin Law Offices, ... Real Estate Attorney Loughlin Peter J Attorney Colby Gamester Consultant Creed Michael Insurance Agency

    Suggested Use

    Restaurant Law Firm Realty agency Spa & Massage Dental Office Hair Salon Nail Salon Clothing Store Food Market Grocery Store

    Zoning and permitted uses should be independently verified with local authorities.

    Location Insight

    • Map
    • Local Demand
    City
    Portsmouth
    County
    Strafford
    State
    New Hampshire
    Longitude
    -70.7541535
    Latitude
    43.0747813

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    FAQs

    What type of property is this?
    Office building - Landmark Portsmouth building, ideal for professional offices or business.
    Where is this office building located?
    The property is located at 144 Washington St Portsmouth, NH.
    What is the asking price?
    The asking price for this property is $3,300,000.
    What are key features of this property?
    This property features: - 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.
    (603) 766-0424
    Request Owner's contact information
    144 Washington St Portsmouth, NH 03801
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    Portsmouth, NH 03801
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    Realmo Value Estimation

    Realmo estimates a property’s market value using a proprietary methodology that incorporates public data and user-submitted information. This cumulative value is generated by integrating a variety of conventional and innovative methods. 

    Disclaimer

    These figures are not official appraisals and should not be used as a substitute for a valuation performed by a licensed appraiser.

    Actual market value may differ due to factors not captured in the data. Estimates are offered for informational purposes only, and users should conduct independent research before making financial or investment decisions.

    By using this feature, you acknowledge that Realmo is not responsible for actions taken based on these estimates.

    AI approach

    Realmo AI Method estimates property value using machine learning models trained on millions of comparable listings, transactions, and market signals. It analyzes property features, location intelligence data, and current market dynamics to predict the most probable market value in real time.

    Cap approach

    Capitalization Method calculates value based on estimated net operating income (NOI) and applying a market-based capitalization rate (cap rate), we estimate what a typical investor might be willing to pay for it.

    Comparable approach

    Comparable estimate is based on recent sales of similar nearby properties, adjusted for factors like size, condition, and location.

    Relative

    Relative property class coefficient uses factors that account for typical price differences between various asset types (e.g., retail vs. industrial) to provide a more accurate market-aligned estimate.

    Geo

    Comparable Sales Method, enhanced by Geo coefficients — location-based adjustment factors that reflect differences in price levels across neighborhoods, cities, or regions ensuring a more accurate, market-sensitive valuation.

    Alternative use

    Estimate considers the property’s potential value if used for a different purpose-based on zoning, demand, and market feasibility.

    More about this property
    144 Washington St Portsmouth, NH 03801
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