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Listed by Red Post Realty · Todd Hudson

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51 Islington Street, Portsmouth, NH

Commercial Sale

For SaleActive

Listed by Red Post Realty · Todd Hudson

Built 2011|Portsmouth

Property Description

Offered at $465,000, this Portsmouth commercial sale at 51 Islington Street pairs New Hampshire living with everyday convenience. Commercial space in this corridor rides the same traffic that feeds the region's resorts and year-round towns. Beyond the basics, the listing carries 2011 construction. Everything below — photos, details, schools and market data — updates live from the MLS.

Situated at a prominent, street-level corner, walking distance to Portsmouth’s vibrant downtown, this turnkey commercial office condo offers an inviting setting for businesses looking to establish or expand their presence. A bold storefront and excellent exterior signage opportunities provide visibility along the emerging Islington Street corridor, with convenient public street parking directly out front. Inside, large windows fill the open, airy space with natural light, creating a welcoming and productive work environment. The flexible layout easily accommodates a variety of office configurations, from an open-concept workspace to individual desk or cubicle arrangements, while two private offices offer the perfect setting for meetings, focused work, or added privacy. With its desirable downtown location, adaptable floor plan, and low monthly condo fees of just $285, this is a compelling opportunity to own commercial space in one of Portsmouth’s evolving business districts.

Location Highlights

51 Islington Street is a commercial sale in Portsmouth, New Hampshire, listed at $465,000. The home was built in 2011. It has been on the market for 5 days.

At this latitude, Portsmouth averages roughly 8.4 hours of sun a day in June and 3.6 in December.

Source: zoned school names are PrimeMLS listing data; distances, sun exposure and school facts are Owl’s Nest Real Estate additions (school facts from the NCES, U.S. Department of Education) — not PrimeMLS data.

Property Details

Essentials & finishes

    • Property Type:Commercial Sale
    • Year Built:2011
    • County:NH-Rockingham
    • Town:Portsmouth, NH
    • Status:Active
    • Days on Market:2

    Primary Features

    CountyNH-Rockingham
    Property TypeCommercial Sale
    Year Built2011
    ZoningCD4-L2

    Interior Features

    BasementNo
    CoolingCentral Air
    ElectricCircuit Breakers
    HeatingHot Air, Natural Gas Available

    Financial Details

    Sale IncludesOther
    Tax - Gross Amount$4,976
    Tax Year2025
    Taxes TBDNo

    Additional

    ConstructionWood Frame, Brick Exterior
    CovenantsUnknown
    Pre-ConstructionNo

    External Features

    FoundationConcrete
    Lot FeaturesIn Town, Near Shopping, Neighborhood, City Lot, Condo Development, Corner Lot, Curbing, Level, Neighbor Business, Sidewalks, Street Lights
    ParkingNone
    Road FrontageYes
    RoofArchitectural Shingle
    SewerPublic
    UtilitiesCable Available
    Water SourcePublic
    MLS®: PrimeMLS #5111132; Listed by Red Post Realty · Todd Hudson

    Property History

    Estimated annual taxes for this property

    YearEst. Tax
    2024$7,905
    2023$7,707
    2022$7,510

    Source: Owl’s Nest Real Estate estimate from the list price at New Hampshire’s average effective tax rate — not PrimeMLS or town assessor data. Verify with the town assessor.

    Market Data

    Live snapshot computed by Owl’s Nest Real Estate from PrimeMLS IDX active listings in this town

    • Active listings in Portsmouth126
    • Average list price$1,153,475
    • Price range$325,000 – $2,890,000

    Mortgage Calculator

    Estimate your monthly payment for this home

    20%
    Loan Term
    6.5%
    Estimated monthly payment$3,107 / mo
    • Principal & Interest$2,351
    • Property Tax$659
    • Home Insurance$97

    Source: Owl’s Nest Real Estate estimate, not PrimeMLS data. Estimates use typical New Hampshire costs — a 1.7% effective property-tax rate, insurance at 0.25% of home value/yr, and PMI below 20% down. Actual town tax rates vary; verify with your lender and the town assessor.

    Around This Property

    Schools, everyday places and nearby destinations near 51 Islington Street, Portsmouth, NHSource: Google Maps Platform (Places) and Owl’s Nest Real Estate — not PrimeMLS data.

    $465,000/ Asking Price
    For SaleActive

    Listed by Red Post Realty · Todd Hudson

    Est. $2,351 / mo20% down · 30yr · 6.5%

    Owl’s Nest Real Estate estimate, not MLS data.

    Tom DeMatteo

    Tom DeMatteo

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    Questions About This Listing

    How much does 51 Islington Street cost?

    51 Islington Street in Portsmouth, NH is listed at $465,000.

    What type of home is 51 Islington Street?

    Commercial sale in Portsmouth, New Hampshire, built in 2011.

    What area is 51 Islington Street in?

    The property is in Portsmouth, New Hampshire (03801).

    How do I find 51 Islington Street on the MLS?

    The MLS number is #5111132 (PrimeMLS), listed on September 23, 2026.

    PrimeMLS

    NOTE: This representation is based in whole or in part on data generated by PrimeMLS, Inc., which assumes no responsibility for its accuracy. The data relating to real estate displayed on this site comes in part from the IDX Program of PrimeMLS.

    This listing data is intended 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 09/28/26.