80 Constitution Avenue, Portsmouth, NH
Condominium
Listed by JD Advisors, LLC · Janet Slome
Property Description
80 Constitution Avenue, Portsmouth is a condominium for sale in New Hampshire at $429,900. The property offers 1 bedroom, 1 bathroom and 615 square feet of living space. Condo ownership here means the plowing, mowing and exterior upkeep belong to the association — the weekend belongs to you. The numbers worth knowing: 2025 construction and roughly $699 per square foot. Scroll on for current photos, the complete spec sheet and this Portsmouth listing's market context.
Newly repriced for the Fall Release. Ask about developer incentives and co-broke bonus. Experience luxury living at Sage Portsmouth, an exceptional new condominium community offering premium amenities that include an entertainment lounge, work-from-home suites, a club room with terrace, fitness center, game lounge, pet spa, and bike storage. Residence #406 is the final studio residence in the building & on the top floor. Far from your typical studio, it is thoughtfully designed and features a separate sleeping area with a generous closet and pocket doors for added privacy. Oversized windows, a smart layout, and premium finishes create a space that truly stands out. Enjoy treetop views and an abundance of natural light adding a touch of serenity and an extra layer of charm to this exceptional home. Located in Portsmouth Green, Sage offers effortless access to upscale boutique shopping, restaurants, and fitness studios, just minutes from downtown Portsmouth. Book a private showing today. We are so excited to welcome you home. Photos and video may be of model home.
Location Highlights
80 Constitution Avenue is a condominium in Portsmouth, New Hampshire, listed at $429,900. That works out to about $699 per square foot, for a home built in 2025. It has been on the market for 9 days.
At this latitude, Portsmouth averages roughly 8.4 hours of sun a day in June and 3.6 in December.
Zoned schools in the Portsmouth: Little Harbor School (Elementary), Portsmouth Middle School (Middle), Portsmouth (High). Always confirm zoning with the district office.
Property Details
Essentials & finishes
- Bedrooms:1
- Total Baths:1
- Full Baths:1
- SqFt:615
- Price / SqFt:$699.02
- Property Type:Condominium
- Year Built:2025
- County:NH-Rockingham
- Town:Portsmouth, NH
- Status:Active
- Days on Market:9
Primary Features
Interior Features
Location Information
Financial Details
Additional
External Features
Property History
Annual taxes for this property
| Year | Assessed Tax |
|---|---|
| 2024 | $7,308 |
| 2023 | $7,125 |
| 2022 | $6,943 |
Estimated from list price; verify with the town assessor.
Market Data
Live snapshot computed from active listings in this town
- Active listings in Portsmouth120
- Average list price$1,160,650
- Price range$469,900 – $2,500,000
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- Principal & Interest$2,174
- Property Tax$609
- Home Insurance$90
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 80 Constitution Avenue, Portsmouth, NH
Questions About This Listing
Can I still buy 80 Constitution Avenue?
The listing's current MLS status is Active. Reach out and we can confirm availability and arrange a showing.
What is the asking price of 80 Constitution Avenue?
80 Constitution Avenue in Portsmouth, NH is listed at $429,900.
That works out to about $699 per square foot.
How big is 80 Constitution Avenue?
The home has 1 bedroom and 1 bathroom.
It offers 615 square feet of living space.
Where is 80 Constitution Avenue located?
The property is in Portsmouth, New Hampshire (03801).
What is the MLS number for 80 Constitution Avenue?
The MLS number is #5107819 (PrimeMLS), listed on September 2, 2026.
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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.
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