18 Mainmast Circle, New Castle, NH 03854

Local realty services provided by:Better Homes and Gardens Real Estate The Masiello Group
18 Mainmast Circle,New Castle, NH 03854
$2,400,000
  • 6 Beds
  • 4 Baths
  • 3,730 sq. ft.
  • Single family
  • Active
Listed by: susan spaulding
Office: the aland realty group
MLS#:5070418
Source:PrimeMLS

Price summary

  • Price:$2,400,000
  • Price per sq. ft.:$628.44

About this home

Experience exceptional living in this rare 6-bedroom, 4-bath home set on a beautifully wooded and private lot in desirable New Castle, NH. Designed for both everyday comfort and impressive entertaining. This home features an open-concept kitchen and living area with soaring cathedral ceilings that create a sense of light and spaciousness. The chef’s kitchen is equipped with top-of-the-line appliances and an spacial flow into the main living space. A stunning stone fireplace anchors the room, offering warmth and architectural impact. With its unusually generous square footage for New Castle, this home provides remarkable flexibility—ideal for living, hosting guests, and dedicated work and creative spaces. Enjoy peaceful, wooded surroundings just moments from the coast. Combining space, privacy, and New Castle’s coveted low tax rate, this property offers an outstanding opportunity in one of New Hampshire’s most sought-after communities.

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Home facts

  • Year built:1974
  • Listing ID #:5070418
  • Added:61 day(s) ago
  • Updated:January 22, 2026 at 11:37 AM

Rooms and interior

  • Bedrooms:6
  • Total bathrooms:4
  • Full bathrooms:2
  • Living area:3,730 sq. ft.

Heating and cooling

  • Heating:Hot Air

Structure and exterior

  • Roof:Asphalt Shingle
  • Year built:1974
  • Building area:3,730 sq. ft.
  • Lot area:0.25 Acres

Schools

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

Utilities

  • Sewer:Pump Up

Finances and disclosures

  • Price:$2,400,000
  • Price per sq. ft.:$628.44
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 January 22, 2026

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