80 Constitution Avenue, Unit 307Portsmouth, NH 03801MLS Number 5081801

Price: $539,900
Est. Mortgage of $/month
43 Days on Market

Experience elevated living at Sage Portsmouth, a premier new condominium community offering concierge services, a club room with terrace, fitness center, game lounge, pet spa, work-from-home spaces, and bike storage. Residence #307 showcases The Harrison, the largest 1-bedroom floor plan, thoughtfully designed to maximize space, light, and functionality. This desirable southeast-facing home features a double vanity in the ensuite bath, additional closet storage rarely found in a 1BR layout, and a private interior balcony that enhances everyday living. Eco-friendly flooring, custom cabinetry, quartz countertops, and under-cabinet lighting create a refined and modern aesthetic throughout. The spacious bedroom offers a walk-in closet and walk-in shower for added comfort and convenience. This 1BR residence also includes two deeded parking spaces, a rare and valuable offering. Ideally located in Portsmouth Green, just minutes from downtown shopping, dining, and fitness studios. Now accepting reservations. Move-in ready. Schedule your private showing today. Images are of model home.

More Info

Rooms

Full Bath1

Building

Year Built2025
ConstructionCement Exterior
GarageNo
Unit Number307
Total Rooms4
FoundationPoured Concrete

Property

AreaNH-Rockingham
Property TypeCondo
Road FrontageTBD
DrivewayCommon/Shared, Paved
RoadsAssociation, Paved, Public
Lot DescriptionCondo Development

Other

Fee IncludesLandscaping, Plowing, Trash
HOA Fee$392
Date Price Change04/02/2026
FrequencyMonthly
Unadjusted TaxesYes
SurveyedYes
SeasonalNo
Time ShareNo
Association AmenitiesClubhouse, Exercise Facility, Indoor Storage, Landscaping, Common Acreage, Elevator(s)
Date Listed04/02/2026
View Count2

Basic Information

List Price$539,900
Square Feet833
StatusACT
Bedrooms1
Bathroom1
StyleFlat, Garden
New ContructionNew Construction
MLS Number5081801
MLS StatusActive

Interior

FloorsCeramic Tile, Manufactured
Interior FeaturesKitchen Island, Kitchen/Dining, Laundry Hook-ups, Living/Dining, Primary BR w/ BA, Walk-in Closet, Smart Thermostat
Stories1

Utilities

Electric150 Amp Service
WaterPublic Water On-Site
Heating CoolingElectric, Heat Pump
SewerPublic Sewer On-Site
UtilitiesCable at Site, Underground Utilities

Location

TownPortsmouth
StateNH
Zip03801
CountyRockingham
ZoningResidential
ComplexSage Portsmouth
DistrictPortsmouth
Flood ZoneNo
Elementary SchoolLittle Harbor School
Junior HighPortsmouth Middle School
High SchoolPortsmouth High School
Address80 Constitution Avenue

Exterior

Exterior ColorWhite/Grey
RoofMembrane

Amenities

PetsCats OK, Dogs OK, Number Limit
PricePerSqFt648.14

Copyright 2026 PrimeMLS, Inc. All rights reserved. This information is deemed reliable, but not guaranteed. The data relating to real estate displayed on this display comes in part from the IDX Program of PrimeMLS. The information being provided is 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 May 14, 2026 1:41 PM EDT

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80 Constitution Avenue, Unit 307Portsmouth, NH 03801MLS Number 5081801

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