Listed by Carey Giampa, LLC/Rye · Anna Friedman · Phone: 207-999-1116
Condominium · Portsmouth, NH
18 Congress Street, Portsmouth, NH
$2,899,000
$2,999,999 · changed Oct 8, 2026
Est. $14,659/mo · 20% down, 30-yr, 6.5% (Owl’s Nest Real Estate estimate, not MLS data)
- Beds
- 3
- Baths
- 3
- Sq Ft
- 2,350
- Built
- 2006
- MLS®
- #5105594
Property Description
Offered at $2,899,000, this Portsmouth condominium at 18 Congress Street pairs New Hampshire living with everyday convenience. It counts 3 bedrooms, 3 bathrooms and 2,350 square feet of living space. Condos in this corridor are the low-maintenance way into the market — association-managed exteriors, shared amenities and predictable monthly costs. Beyond the basics, the listing carries garage parking for 2, 2006 construction and roughly $1,234 per square foot. Everything below — photos, details, schools and market data — updates live from the MLS.
Welcome to an extraordinary opportunity for elevated downtown living in the heart of Portsmouth. Residence 302 at 18 Congress Street is a rare, oversized double unit condo offering an exceptional sense of scale, privacy, and sophistication, with a front row seat to the energy and charm of Market Square. Wrapped in an impressive thirteen celestial windows, this expansive residence is filled with natural light from multiple exposures, creating a bright and airy atmosphere throughout. The main living area features beautiful hardwood floors and vaulted ceilings, complemented by large windows overlooking Market Square, custom built in bookcases, and a gas fireplace. The result is a gracious living and dining space equally suited to intimate evenings or sophisticated entertaining.The beautifully appointed chef’s kitchen offers generous workspace and storage. The oversized primary suite provides a luxurious private retreat, enhanced by vaulted ceilings, abundant natural light, 3 walk-in closets, and a spa like en-suite bath featuring a jetted soaking tub. Two more spacious bedrooms with their own full bath, as well as an additional room for a den or home office. In unit laundry adds everyday convenience, and a gorgeous rooftop deck for an exceptional setting to entertain, relax, or simply enjoying the sunrise and sunsets of downtown Portsmouth. Two deeded, on-site secure and temperature controlled garage parking spaces, additional private storage, and elevator access directly from the garage to the third-floor residence further distinguish this remarkable property. Perfectly positioned to enjoy Portsmouth’s acclaimed restaurants, boutique shopping, galleries, entertainment, and historic charm, this exceptional double unit residence combines the space and amenities of a luxury home with the unparalleled convenience of downtown living. A rare offering of scale and distinction, your private front row seat to all that Portsmouth has to offer.
Location Highlights
18 Congress Street is a condominium in Portsmouth, New Hampshire, listed at $2,899,000. That works out to about $1,234 per square foot, for a home built in 2006. It has been on the market for 3 months.
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
- Bedrooms
- 3
- Total Baths
- 3
- Full Baths
- 2
- SqFt
- 2,350
- Price / SqFt
- $1233.62
- Property Type
- Condominium
- Year Built
- 2006
- County
- NH-Rockingham
- Town
- Portsmouth, NH
- Status
- Active
- Days on Market
- 76
Primary Features
- County
- NH-Rockingham
- Property Type
- Residential
- Year Built
- 2006
- Zoning
- CBB
Interior Features
- Appliances
- Gas Cooktop, Dishwasher, Disposal, Dryer, Double Oven, Refrigerator
- Basement
- No
- 1/4 Baths
- 0
- 3/4 Baths
- 0
- Cooling
- Central Air
- Electric
- Circuit Breakers
- Flooring
- Carpet, Hardwood, Tile
- Heating
- Forced Air, Natural Gas, Gas Fireplace
- Interior Features
- Central Vacuum, Gas Fireplace, 1 Fireplace, Kitchen Island, Primary BR w/ BA, Security Door(s), Soaking Tub, Vaulted Ceiling(s), Walk-In Closet(s), 1st Floor Laundry
- Rooms - Total
- 7
- SqFt-Approximate Finished Above Grade
- 2,350
- SqFt-Approximate Finished Below Grade
- 0
- SqFt Approximate Total Finished
- 2,350
- SqFt Approximate Total
- 2,350
Financial Details
- Association Fee
- $879.99
- Fee Frequency
- Monthly
- Fee Includes
- Condo Association Fee, Plowing, Trash
- Tax - Gross Amount
- $25,919
- Tax Year
- 2025
- Taxes TBD
- No
Additional
- Construction Status
- Existing
- Construction
- Brick
- Covenants
- Unknown
- Flood Zone
- No
- Pre-Construction
- No
- Property Sub Type
- Condominium
- Seasonal
- No
- Total Stories
- One
- Surveyed
- Unknown
- Timeshare/Fractional Ownership
- No
External Features
- Driveway
- Paved
- Foundation
- Concrete
- Garage
- Yes
- Garage Capacity
- 2
- Lot Features
- City Lot, Sidewalks, Near Shopping, Near Public Transit, Near School(s)
- Parking
- Assigned, Attached, Covered, Deeded, Direct Access, Heated Garage, Paved, Parking Spaces 2
- Road Frontage Type
- Public
- Road Frontage
- TBD
- Roof
- Membrane, Architectural Shingle
- Sewer
- Public
- Utilities
- Cable, Gas On-Site
- Water Source
- Public
MLS®: PrimeMLS #5105594; Listed by Carey Giampa, LLC/Rye · Anna Friedman · Phone: 207-999-1116
Property History
Estimated annual taxes for this property
- 2024
- $49,283
- 2023
- $48,051
- 2022
- $46,819
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 Portsmouth
- 124
- Average list price
- $1,116,133
- Price range
- $425,000 – $2,775,000
Mortgage Calculator
Estimate your monthly payment for this home
Estimated Monthly Payment
$19,370/ mo
- Principal & Interest
- $14,659
- Property Tax
- $4,107
- Home Insurance
- $604
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 18 Congress Street, Portsmouth, NH
Source: Google Maps Platform (Places) and Owl’s Nest Real Estate — not PrimeMLS data.
Questions About This Listing
How much does 18 Congress Street cost?
18 Congress Street in Portsmouth, NH is listed for $2,899,000 on PrimeMLS.
That is about $1,234 per square foot of finished living space.
It came on the market on August 19, 2026.
How many bedrooms and bathrooms does 18 Congress Street have?
18 Congress Street in Portsmouth, NH has 3 bedrooms and 3 bathrooms (2 full and 1 half) in 2,350 square feet of finished living space.
What parking does 18 Congress Street have?
18 Congress Street in Portsmouth, NH has a 2-car garage and a paved driveway.
Parking details: assigned, attached, covered, deeded, direct access and heated garage.
Is 18 Congress Street still for sale?
Yes. 18 Congress Street in Portsmouth, NH is listed as Active on PrimeMLS (MLS #5105594).
Status can change quickly; contact us to confirm availability before you visit.
Which brokerage has 18 Congress Street listed?
18 Congress Street in Portsmouth, NH is listed by Anna Friedman of Carey Giampa, LLC/Rye (603-964-7000).
Owl's Nest Real Estate shows it through the PrimeMLS IDX feed; we are not the listing brokerage.
What type of home is 18 Congress Street?
18 Congress Street in Portsmouth, NH is a condominium built in 2006.
The MLS lists its style as High Rise, with one story.
What town is 18 Congress Street in?
18 Congress Street is in Portsmouth, New Hampshire 03801, in Rockingham County.
Location notes from the MLS: sidewalks, near shopping, near public transit and near school(s).
What are the annual property taxes for 18 Congress Street?
Annual property taxes on 18 Congress Street in Portsmouth, NH are $25,919 for the 2025 tax year, per the MLS.
New Hampshire towns set their own tax rates and revalue periodically, so confirm the current bill with the Portsmouth assessing office.
What are the association fees for 18 Congress Street?
The association fee for 18 Congress Street in Portsmouth, NH is $879 (monthly), per the MLS.
The MLS lists the fee as covering plowing and trash.
Ask for the association documents and budget to see exactly what the fee covers.
What heating and cooling does 18 Congress Street have?
18 Congress Street in Portsmouth, NH is heated by forced air, natural gas and gas fireplace, per the MLS.
Cooling: central air.
What are the water and sewer systems at 18 Congress Street?
18 Congress Street in Portsmouth, NH has public water and public sewer, per the MLS.
MLS details — water: public; sewer: public.
Electric: circuit breakers.
Other utilities: cable and gas on-site.
Does 18 Congress Street have a basement?
No. The MLS lists no basement at 18 Congress Street in Portsmouth, NH.
What are the key features of 18 Congress Street?
Inside, the MLS lists these features at 18 Congress Street in Portsmouth, NH: central vacuum, gas fireplace, 1 fireplace, kitchen island, primary BR w/ BA, security door(s), soaking tub and vaulted ceiling(s).
Flooring: carpet, hardwood and tile.
Listed appliances: gas cooktop, dishwasher, disposal, dryer, double oven and refrigerator; confirm which ones convey in the purchase agreement.
How does the price of 18 Congress Street compare with other Portsmouth listings?
At $2,899,000, 18 Congress Street in Portsmouth, NH is priced above the $659,900 median asking price of the 69 condos for sale in Portsmouth on PrimeMLS as of November 3, 2026 (this listing included).
That figure is Owl's Nest Real Estate's analysis of active listings, and asking prices are not sale prices — ask us for recent comparable sales before you make an offer.
How can I see 18 Congress Street in person?
To see 18 Congress Street in Portsmouth, NH, use Request a Showing on this page or call Owl's Nest Real Estate at 401-648-5308.
We can show any MLS-listed home and represent you as your buyer's agent; the listing brokerage represents the seller.
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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 11/03/26.