Welcome to 18 Congress Street set in the heart of Market Square in historic downtown Portsmouth. This building is one of the only modern luxury condominium residences located directly within the historic core of the city. From this address you have easy access to the waterfront, renowned restaurants, charming cafés, boutique shops, and cultural landmarks such as The Music Hall and Jimmy’s Jazz & Blues Club. Whether you’re grabbing morning coffee at Popovers or La Maison Navarre, you’ll be surrounded by the best of city living from the moment your day begins. This 3rd floor residence offers an open-concept living space filled with natural light, charming views of quiet Porter Street, & a gas fireplace for cozy evenings. Two spacious bedrooms and two full bathrooms provide comfort and privacy, while a 3rd small room offers an opportunity for an office space or large walk-in closet or pantry. Everyday convenience is built in with in-unit laundry, secure elevator access, and one deeded parking space in the private garage. Residents also enjoy access to the rooftop deck which is perfect for entertaining, taking in the skyline, or watching Portsmouth’s fireworks. Updates include fresh interior paint, new kitchen appliances, & new carpet. Opportunities to own in this building are few and far between - Don’t miss the chance to make this one-of-a-kind downtown home part of your everyday life.
Closed
Listed by: KW Coastal and Lakes & Mountains Realty/Portsmouth • Erin Proulx
Bought with: Duston Leddy Real Estate
$1,100,000
18 Congress Street #308, Portsmouth, NH 03801
2beds
1,253sqft
Condominium
Built in 2006
-- sqft lot
$1,104,800 Zestimate®
$878/sqft
$4,703 Estimated rent
Home value
$1,104,800
$1.03M - $1.18M
$4,703/mo
Zestimate® history
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Two spacious bedroomsIn-unit laundryNew carpetFresh interior paintNew kitchen appliances
Zillow last checked:
Listing updated:
Listed by:
Erin Proulx,
KW Coastal and Lakes & Mountains Realty/Portsmouth Erin@ProulxRealEstate.com
Bought with:
Tom Gorski
Duston Leddy Real Estate
Source: PrimeMLS,MLS#: 5078424
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 2
- Bathrooms: 2
- Full bathrooms: 2
Heating
- Natural Gas, Forced Air
Cooling
- Central Air
Appliances
- Included: Dishwasher, Dryer, Microwave, Refrigerator, Washer, Electric Stove
- Laundry: 1st Floor Laundry
Features
- Primary BR w/ BA, Natural Light
- Flooring: Carpet, Hardwood, Tile
- Has basement: No
- Number of fireplaces: 1
- Fireplace features: Gas, 1 Fireplace
Interior area
- Total structure area: 1,253
- Total interior livable area: 1,253 sqft
- Finished area above ground: 1,253
- Finished area below ground: 0
Property
Parking
- Total spaces: 1
- Parking features: Direct Entry, Assigned, Deeded, Garage, On Site, Parking Spaces 1, Underground, Covered
- Garage spaces: 1
Accessibility
- Accessibility features: 1st Floor Bedroom, 1st Floor Full Bathroom, Access to Parking, No Stairs, No Stairs from Parking, One-Level Home, Paved Parking, 1st Floor Laundry
Features
- Levels: One
- Stories: 1
Lot
- Features: City Lot, Condo Development, Sidewalks, Street Lights, In Town, Near Shopping, Near School(s)
Details
- Parcel number: PRSMM0117B0037L308
- Zoning description: CBB
Construction
Type & style
- Home type: Condo
- Property subtype: Condominium
Materials
- Brick Exterior
- Foundation: Concrete
- Roof: Asphalt Shingle
Condition
- New construction: No
- Year built: 2006
Utilities & green energy
- Electric: 200+ Amp Service, Circuit Breakers
- Sewer: Public Sewer
- Utilities for property: Other
Community & HOA
HOA
- Amenities included: Master Insurance, Landscaping, Snow Removal, Trash Removal
- Services included: Maintenance Grounds, Sewer, Trash, Water, Condo Association Fee
- Additional fee info: Fee: $525
Location
- Region: Portsmouth
Financial & listing details
- Price per square foot: $878/sqft
- Tax assessed value: $1,226,000
- Annual tax amount: $14,111
- Date on market: 3/6/2026
- Road surface type: Paved
Price history
| Date | Event | Price |
|---|---|---|
| 6/15/2026 | Sold | $1,100,000-3.9%$878/sqft |
Source:  PrimeMLS #5078424 Report a problem | ||
| 5/21/2026 | Pending sale | $1,145,000$914/sqft |
Source: PrimeMLS #5078424 Report a problem | ||
| 5/15/2026 | Price change | $1,145,000-4.2%$914/sqft |
Source: PrimeMLS #5078424 Report a problem | ||
| 3/6/2026 | Listed for sale | $1,195,000-4.4%$954/sqft |
Source: PrimeMLS #5078424 Report a problem | ||
| 1/12/2026 | Listing removed | $1,250,000$998/sqft |
Source: PrimeMLS #5068923 Report a problem | ||
| 11/7/2025 | Listed for sale | $1,250,000+147.5%$998/sqft |
Source: PrimeMLS #5068923 Report a problem | ||
| 4/17/2007 | Sold | $505,000$403/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | $13,707 +26.2% | $1,226,000 +82.1% |
| 2023 | $10,860 +6.1% | $673,300 |
| 2022 | $10,234 +3.4% | $673,300 |
| 2020 | $9,898 -1.1% | $673,300 |
| 2019 | $10,005 -5.9% | $673,300 +0.3% |
| 2018 | $10,630 +3% | $671,100 |
| 2017 | $10,322 +6.3% | $671,100 +17.8% |
| 2016 | $9,708 +1.5% | $569,700 |
| 2015 | $9,565 +5.2% | $569,700 +13.5% |
| 2014 | $9,088 +3.1% | $502,100 |
| 2012 | $8,812 +1.6% | $502,100 |
| 2011 | $8,671 -0.8% | $502,100 |
| 2010 | $8,742 | $502,100 |
Find assessor info on the county website
Neighborhood: 03801
Nearby homes
- $1,515,0002 bd2 ba1.4k sqft18 Congress St SUITE 304, Portsmouth, NH 03801Sold
- $1,375,0002 bd2 ba1.3k sqft18 Congress St SUITE 405, Portsmouth, NH 03801Sold
- $1,001,4002 bd3 ba1.6k sqft18 Congress St, Portsmouth, NH 03801Off Market
- $1,500,0002 bd2 ba1.4k sqft18 Congress St SUITE 306, Portsmouth, NH 03801Sold
- $---- bd-- ba-- sqft26 Congress St, Portsmouth, NH 03801Off Market
- $1,336,9002 bd2 ba1.3k sqft18 Congress St SUITE 301, Portsmouth, NH 03801Off Market
- $3,070,3003 bd3 ba2.1k sqft18 Congress St SUITE 302, Portsmouth, NH 03801Off Market
- $1,301,9002 bd2 ba1.2k sqft18 Congress St SUITE 303, Portsmouth, NH 03801Off Market
Nearby schools
GreatSchools rating
- 10/10Little Harbour SchoolGrades: K-5Distance: 0.7 mi
- 8/10Portsmouth Middle SchoolGrades: 6-8Distance: 0.2 mi
- 10/10Portsmouth High SchoolGrades: 9-12Distance: 1.3 mi
Schools provided by the listing agent
- Elementary: Little Harbor School
- Middle: Portsmouth Middle School
- High: Portsmouth High School
- District: Portsmouth
Source: PrimeMLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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Estimated market value
$1,104,800
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Estimated market value
$1,104,800
- New Hampshire
- Rockingham County
- Portsmouth
- 03801
- 18 Congress Street Unit 308
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