18 Mainmast CircleNew Castle, NH 03854MLS Number 5070418

  • Price: $2,400,000
  • Est. Mortgage of $/month
  • 62 Days on Market
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Federal 30-year interest rate: 6.06% last updated on Jan 15, 2026
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18 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 0385418 Mainmast Circle New Castle NH 03854
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  • 6Bedrooms
  • 0.25Acreage
  • 4Bathrooms
  • 1974Year Built

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Listed by Susan Spaulding of The Aland Realty Group
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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More Info

Parking

  • Parking Spaces
  • GarageNo

Building

  • Year Built1974
  • Building ConstructionCedar Exterior
  • ConstructionExisting
  • Property StyleContemporary, Multi-Level
  • Bedrooms6
  • Bathroom4
  • Total Baths4
  • 3/4 Baths1
  • Half Bath1
  • Total Rooms9
  • Square Feet3,730
  • APX Unfin Below Grade89
  • BasementBasement Stairs
  • FoundationConcrete

Exterior

  • Exterior Colornatural
  • RoofAsphalt Shingle

Legal

  • Tax ReductionYes
  • Zoningresidential
  • Surveyed Y/NYes

Rooms

  • Full Bath2

Location

  • Building Number18
  • StreetMainmast Circle
  • TownNew Castle
  • StateNH
  • Zip03854
  • CountyRockingham
  • DistrictPortsmouth
  • Elementary SchoolMaude H. Trefethen School
  • Junior HighRye Junior High School
  • High SchoolPortsmouth High School
  • Map9
  • Flood Zone Y/NNo
  • Address18 Mainmast Circle

Interior

  • Interior FeaturesWood Fireplace, Wood Stove Hook-up
  • FloorsHardwood, Tile
  • Stories3

Amenities

  • PricePerSqFt643.43

Other

  • Delayed ShowingsNo
  • SeasonalNo
  • Page947
  • Date Listed11/21/2025
  • View Count5

Basic Information

  • MLS Number5070418
  • MLS StatusActive
  • Virtual TourView Tour
  • StatusACT
  • Property TypeSingle Family
  • List Price$2,400,000
  • Listing Agent NameSusan Spaulding
  • Broker NameThe Aland Realty Group

Property

  • Acreage0.25
  • Lot DescriptionWooded
  • AreaNH-Rockingham
  • Lot7
  • DrivewayGravel
  • RoadsPaved, Public
  • Road Frontage111

Utilities

  • Heat SystemHot Air
  • WaterPublic
  • SewerPump Up
  • Electric200+ Amp Service
  • UtilitiesCable at Site
The Hamptons Real Estate Main Office

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The Hamptons Real Estate Main Office
Office: (603) 926-1400
25 Lafayette Rd
Hampton Falls , NH 03844
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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 January 21, 2026 9:23 PM EST

 

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