Browse All Portsmouth NH Multi-Family Properties for Sale

Exceptional owner-occupied and investment opportunity in Portsmouth's coveted South End. This beautifully updated legal two-unit property combines the charm of a historic home while offering the ideal blend of lifestyle and cash flow. You'll love the flexibility of the layout as well which can be configured as a single family home, or side-by-side duplex, or it's current layout as a home with a 2-room studio apartment. The owner's residence is filled with timeless New England character while offering thoughtful modern updates throughout. The attached studio features its own private entrance, efficient layout, and a spa-inspired bathroom complete with a private sauna, creating a memorable guest or tenant experience. Outside you'll enjoy morning coffee or evening cocktails on your spacious, private back patio - and a private patio for the apartment as well! The oversized shed offers fantastic storage, a work shop, or garage potential. Originally built circa 1750, the property underwent extensive exterior renovations in 2025, including a new roof, four skylights, new windows, cedar siding on the front façade, Hardie® cement board siding on the sides and rear, and blown-in insulation. Additional features include natural gas heat (new furnace being installed prior to closing), public water and sewer, two 100-amp panels, a detached storage shed, and 1 off-street parking spot. Located just steps from Prescott Park, Strawbery Banke, the Piscataqua River waterfront, and Portsmouth's renowned restaurants, boutiques, and entertainment, this is a rare opportunity to own an income-producing property in one of New England's most desirable coastal communities. Whether you're looking to offset your mortgage with rental income, expand your investment portfolio, or enjoy the flexibility of a legal two-unit property in an unbeatable location, 491 Marcy Street offers exceptional value and endless possibilities. Showings start at open house, Saturday July 25th, 12 to 2pm.

491 Marcy St, Portsmouth

$1,176,000

5100531 MLS

Exceptional Portsmouth Duplex – Fully Updated Investment or Owner-Occupant Opportunity – $1,176,000 Rare opportunity to own a beautifully updated duplex in one of Portsmouth's most desirable neighborhoods. Whether you're looking to expand your investment portfolio, live in one unit while generating rental income from the other, or accommodate multi-generational living, this property offers outstanding flexibility in a prime Seacoast location. Each unit features 3 bedrooms and 1 full bathroom with spacious, functional layouts designed for comfortable living. Recent improvements include new energy-efficient windows, updated kitchens with modern finishes, renovated bathrooms, and new central air conditioning, making this a truly move-in-ready property with contemporary style and comfort throughout. Perfectly located just minutes from downtown Portsmouth, residents will enjoy easy access to award-winning restaurants, boutique shopping, the waterfront, parks, schools, and entertainment. Commuters will appreciate the quick access to I-95, Route 1, and nearby employment centers, providing convenience without sacrificing the charm of one of New Hampshire's most sought-after communities. Properties offering two updated 3-bedroom units in Portsmouth are exceptionally rare. Whether you're seeking strong rental potential, long-term appreciation, or the flexibility of owner occupancy with income, this duplex presents an outstanding opportunity. Property Highlights: Duplex with two 3-bedroom, 1-bath units Updated kitchens and bathrooms New energy-efficient windows New central air conditioning Spacious layouts with modern finishes Excellent investment or owner-occupied opportunity Prime Portsmouth location close to downtown, shopping, dining, and major highways Offered at $1,176,000 Don't miss your chance to own this exceptional duplex in one of the Seacoast's most desirable markets. Schedule your private showing today.

184 Echo Ave, Portsmouth

$1,350,000

5097886 MLS

197 Richards Avenue presents a rare investment opportunity in Portsmouth's highly sought-after Little Harbor neighborhood. Situated on a generous 0.24-acre lot just moments from downtown, this three-unit property offers an exceptional combination of location, income potential, and future upside in one of the Seacoast's most desirable markets. The property features approximately 2,405 square feet of finished living space across three residential units, each thoughtfully equipped with its own in-unit washer and dryer. Ample off-street parking is located behind the building. Whether maintained as an income-producing asset, repositioned through renovations and value-add improvements, or utilized as an owner-occupied investment opportunity, 197 Richards Avenue offers the flexibility and long-term potential rarely found in such a premier Portsmouth location. Opportunities to acquire multifamily properties with this combination of scale, location, and redevelopment potential are increasingly limited.

197 Richards Ave, Portsmouth

$899,900

5096914 MLS

648 Kearsarge Way is a well-maintained duplex located in Portsmouth's desirable Atlantic Heights neighborhood. The property offers two, two bedrooms and one bathroom units. Situated just minutes from historic downtown Portsmouth, the Portsmouth Naval Shipyard, shopping, restaurants, schools, and major commuter routes, the property combines neighborhood charm with convenient access to local amenities. The Atlantic Heights neighborhood is known for its walkability, public recreation, mature tree-lined streets, and historic character. The two-unit layout provides flexibility for multi-generational living, long-term rental income, owner occupancy living while generating supplemental revenue, and investment portfolio growth. Many of the main systems in the home have been updated in the last five years, along with the wood floors, paint, and kitchen countertops The property's manageable lot size makes it an attractive option for buyers seeking both convenience and character in one of the Seacoast's most desirable communities.

648 Kearsarge Way, Portsmouth

$3,600,000

5095216 MLS

The Pickering-Heffenger House c.1804 Live where history was made and where diplomats, dignitaries, and world leaders once gathered. The Pickering-Heffenger House is one of Portsmouth's most significant residences, prominently featured in Richard Candee's Building Portsmouth and John Mead Howells' Architectural History of the Piscataqua. Its most celebrated chapter occurred in 1905 when Dr. Arthur Heffenger, a retired U.S. Navy physician, hosted members of the Russian delegation during negotiations for the historic Portsmouth Peace Treaty. The grandeur of that era remains evident throughout the home with quadruple crown moldings, marble fireplace mantels, soaring ceilings, and extraordinary millwork. Thoughtfully modernized for today's lifestyle, the residence offers a beautifully appointed granite kitchen, wide-board cherry floors, six bedrooms, and six renovated bathrooms that seamlessly blend historic character with modern comfort. The original carriage house and stable have been transformed into three residences consisting of two one-bedroom apartments and one two-bedroom apartment, creating flexibility for guests, extended family, rental income, or staff accommodations. Perhaps most compelling are the property's future possibilities. It can continue as one of Portsmouth's great private estates, become a multi-generational family compound, or be thoughtfully repositioned as a condominium conversion opportunity. An existing inn license also creates potential for boutique hospitality, subject to approvals. Situated along tree-lined Austin Street and just steps from downtown Portsmouth, this is more than a home—it's an opportunity to own, preserve, and redefine one of the Seacoast's truly iconic properties.

53 Austin St, Portsmouth

$1,200,800

5093622 MLS

Investors, builders, and contractors—don’t miss this value-add 4-unit multifamily opportunity at 357 Maplewood Ave, Portsmouth, NH, located within walking distance to downtown Portsmouth. Prime chance to renovate and reposition in one of the Seacoast’s most desirable rental markets. The property needs significant updating, making it an ideal project for an experienced contractor or builder looking to add sweat equity and create long-term upside. Convenient to shops, dining, waterfront, and commuter routes. Bring your vision and transform this multi-family into a standout investment.

357 Maplewood Ave, Portsmouth

$1,485,000

5093064 MLS

Welcome to 978/980 South Street, a rare multi-unit opportunity in Portsmouth's highly sought-after Little Harbor neighborhood. This well-maintained property features extensive exterior improvements and offers a unique blend of owner-occupancy potential and investment appeal. The owner's unit has been thoughtfully renovated throughout and features 3 bedrooms, 2 bathrooms, and three levels of modern, functional living space while preserving the character and charm that make this property so special. Bright, inviting interiors and quality updates create a move-in-ready home designed for today's lifestyle. Both owners and tenants will appreciate the property's practical layout, garage parking, and abundant storage. Outside, extensive gardens and beautifully landscaped grounds provide a private and picturesque setting rarely found in multi-family properties. Whether you're seeking a strong income-producing asset, a multi-generational living arrangement, or the opportunity to offset ownership costs with rental income, this exceptional property offers outstanding flexibility. Conveniently located just minutes from downtown Portsmouth, the waterfront, parks, shopping, dining, and major commuter routes, 978/980 South Street presents a unique opportunity to own a distinctive multi-unit property in one of the Seacoast's most desirable neighborhoods.

978-980 South St, Portsmouth

$4,200,000

5084747 MLS

Historical gem in the heart of downtown Portsmouth! This mixed-use building consists of four residential units and one commercial unit on one of the most visible corners of the city. Scrupulously renovated throughout in 2017-2018 these luxury units, feature historical masonry walls, exposed wooden beams, wooden floors all while marrying modern finish and convenience. Large replacement windows look out onto the city streets with several units featuring incredible water views out to the Piscataqua River and Portsmouth tug boats. The first floor commercial space, currently occupied by Bangor Savings Bank sees robust pedestrian and vehicular counts with unmatched visibility. A private residential entrance along the side of the building leads you to the four residential units on the second and third floors. All residential units have been fully furnished with a design eye in mind and feature full kitchens that open up to the main living spaces. The top floor units feature vaulted ceilings with lofted bedrooms with windows and skylights flooding the units with natural light. The basement area features two common washers and two common dryers for easy tenant use. Coupled with four private storage areas, tenants are provided with every convenience. A rare opportunity to own your own piece of historical Portsmouth in a building with proven success.

8 Bow St, Portsmouth

$949,500

5081394 MLS

INVESTORS & CONTRACTORS TAKE NOTICE! This is the West End restoration opportunity you’ve been waiting for. Located just a 10-minute stroll from the heart of downtown Portsmouth, this stately duplex offers a rare “blank canvas” for those looking to create a masterpiece in one of the Seacoast’s most desirable neighborhoods. Currently occupied and functioning as a two-family residence, this property is home to families on both the first and second floors. While the home requires significant rehabilitation and a “top-to-bottom” vision, its solid bones and classic New England character remain intact. Whether you are looking for a high-yield investment project, a condo conversion opportunity (CD4-L2 Zoning), or a “sweat equity” dream home where you can live in one unit while restoring the other, the potential here is unmatched. You simply cannot beat this location. Enjoy the best of Portsmouth’s West End! Walk to local coffee shops, award-winning restaurants, and the vibrant energy of Market Square in minutes. Properties in this corridor, especially those with this much “value-add” potential, are becoming increasingly rare. Property Highlights: Versatile Duplex Layout: Separate units on the first and second floors. Premium West End Corridor: High-demand area with strong historical appreciation. Zoning Potential: CD4-L2 district offers various development or conversion paths. Rare amenities: Enjoy a spacious, fenced-in backyard and the incredible convenience of TWO separate driveways providing rare off-street parking for both units. Livable Restoration: Currently housing two families, providing immediate functionality while you plan your renovation. Bring your contractor, your architect, and your vision. 413 Islington St is ready for its next chapter. Sold “as-is.”

413 Islington St, Portsmouth

$1,795,000

5073158 MLS

Welcome to 25 South Mill Street — a rare offering of newer construction (built in 2013) located on the waterfront in one of Portsmouth’s most sought-after neighborhoods. This thoughtfully designed two-family home presents a unique opportunity to own a versatile, income-generating property in a premier location. Each of the two units features 2 bedrooms, 1 full bath, and in-unit laundry, offering comfortable, modern living with a coastal flair. The upper unit enjoys elevated views and higher ceilings, maximizing light and enhancing the stunning water vistas. Outdoors, you'll find no shortage of parking with a deep, oversized garage (approx. 14' x 26') and a driveway that accommodates 6+ vehicles — an exceptional amenity for South End living. With flexible use options, this property is ideal for an owner-occupant looking to offset their costs with rental income, investors seeking a premium location asset, or those envisioning a condo conversion or conversion to a single-family residence. The upper unit is currently vacant in order to make showing the property easier (most recently rented in 2025 for $2900/month), while the lower unit is leased through April 2026, providing both immediate flexibility and reliable income. Don’t miss this exceptional opportunity in the heart of the South End — just a short stroll to downtown Portsmouth, Prescott Park, and the city’s vibrant waterfront scene.

25 S Mill St, Portsmouth

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