350 Portsmouth Avenue, New Castle, NH 03854

New Castle
Local realty services provided by:ERA Key Realty Services
350 Portsmouth Avenue,New Castle, NH 03854
$4,200,000
Virtual Tour
  • 2 Beds
  • 5 Baths
  • 3,238 sq. ft.
  • Single family
  • Active
Listed by: janet sylvester, margaret pesce
Office: great island realty llc.603-433-3350
MLS#:5107161
Source:PrimeMLS

Price summary

  • Price:$4,200,000
  • Price per sq. ft.:$1,004.54

About this home

Welcome to 350 Portsmouth Avenue, an exceptional waterfront residence offering a front row seat to one of the most captivating maritime settings on the New Hampshire Seacoast. With expansive water views of the Piscataqua River and Back Channel, this remarkable property captures everything that makes New Castle waterfront living so special. From magnificent ships and iconic Portsmouth tugboats to sailboats, fishing vessels and pleasure craft, the ever changing boat traffic provides a spectacular backdrop from morning until night. A private deep water dock makes this a dream for boating enthusiasts, offering direct access to Portsmouth Harbor, the Piscataqua River and the open Atlantic. Adding to the property's unique appeal is deeded access to the Back Channel, creating a wonderful launching point for kayaks and paddleboards. Designed to embrace this extraordinary setting, the home features multiple waterfront decks for entertaining, outdoor dining or simply watching the river come...

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Home facts

  • Year built:1977
  • Listing ID #:5107161
  • Added:2 day(s) ago
  • Updated:August 31, 2026 at 11:39 AM

Rooms and interior

  • Bedrooms:2
  • Total bathrooms:5
  • Full bathrooms:1
  • Rooms Total:7
  • Flooring:Carpet, Tile
  • Kitchen Description:Dishwasher, Refrigerator
  • Basement Description:Climate Controlled, Daylight, Full, Partially Finished, Walkout
  • Living area:3,238 sq. ft.

Heating and cooling

  • Cooling:Central AC
  • Heating:Forced Air, Oil

Structure and exterior

  • Roof:Asphalt Shingle
  • Year built:1977
  • Building area:3,238 sq. ft.
  • Lot area:0.25 Acres
  • Levels:2 Story

Schools

  • High school:Portsmouth High School
  • Middle school:Rye Junior High School
  • Elementary school:Maude H. Trefethen School

Utilities

  • Sewer:Public Available

Finances and disclosures

  • Price:$4,200,000
  • Price per sq. ft.:$1,004.54
  • Tax amount:$15,636 (2025)

Features and amenities

  • Appliances:Refrigerator

Parking

  • Parking description:Paved Driveway
  • Garage spaces:2
MLS LogoCopyright 2026 Prime MLS, Inc. All rights reserved. This information is deemed reliable, but not guaranteed. The data relating to real estate displayed on this Site comes in part from the IDX Program of Prime MLS. The information being provided is for consumers’ personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated August 31, 2026

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