18 Mainmast Cir

New Castle, NH 03854

$2,400,000
Price
6
Beds
3,730 Sq. Ft.
$643 / Sq. Ft.
3,730
Sq. Ft.
$643
per Sq. Ft.

Description

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...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.
  1. Listed by Susan Spaulding • The Aland Realty Group

Property Details for 18 Mainmast Circle

Zoning
residential
LISTING UPDATED: 12/18/2025 03:52 PM

Property Details for 18 Mainmast Circle

StatusActive
MLS #5070418
Days on Market57
Taxes-
HOA Fees-
Condo/Co-op Fees-
Compass TypeSingle Family
MLS TypeResidential / Single Family
Year Built1974
Lot Size0.25 AC / 10,890 SF
CountyRockingham County

Location

Listing Courtesy of The Aland Realty Group
Add your commute

Building Information for 18 Mainmast Circle

Stories3Year Built1974Building Size-Lot Size0.25 AC / 10,890 SF

Payment Calculator

$12,181 per month

30 year fixed, 6.15% Interest

Principal and Interest

$11,697

Property Taxes

$484

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 18 Mainmast Circle

Summary
Location and General Information
  • City: New Castle
  • County: NH-Rockingham
  • Directions: Turn onto Walton Road off 1B in New Castle, continue until road curves to the right, house is second on right on Mainmast Circle,
  • Latitude: 43.066580000001004
  • Longitude: -70.721542999999997
  • Road Frontage: Yes
  • Seasonal: No
  • State: NH
  • Street Designation: Circle
  • Map: 000009
  • Zip Code: 03854
Taxes and HOA Information
  • Taxes TBD: Yes
Parking
  • Garage: No
  • Driveway: Gravel
Property
Lot Information
  • Block: 0
  • Lot: 000007
  • Lot Features: Wooded
  • Lot Size Acres: 0.25
  • Road Frontage Length: 111.0
Property and Assessments
  • Current Use: No
  • Property Class: Residential
  • Property Type: Single Family
  • Construction Status: Existing
  • Flood Zone: No
  • PreConstruction: No
  • Surveyed: Yes
  • Year Built: 1974
Utilities
  • Electric: 200+ Amp Service
  • Sewer: Pump Up
  • Water Source: Public
  • Utilities: Cable at Site
  • Internet: High Speed Intrnt at Site
Interior and Exterior Features
Exterior Features
  • Color: natural
  • Construction Materials: Cedar Exterior
  • Roof: Asphalt Shingle
Interior Features
  • Appliances: Gas Cooktop, Dishwasher, Double Oven, Refrigerator
  • Basement: Yes
  • Basement Access Type: Interior
  • Basement Description: Basement Stairs
  • Flooring: Hardwood, Tile
  • Heating: Hot Air
  • Cooling: None
  • Total Stories: 3

Property History for 18 Mainmast Circle

DateEvent & SourcePriceAppreciation
Nov 21, 2025

Listed (Active)

New England Real Estate Network #5070418

$2,400,000—
Nov 22, 2012

Expired

New England Real Estate Network #4160031

—
May 24, 2012

Listed (Active)

New England Real Estate Network #4160031

$1,150,000—
Jul 17, 2008

Expired

New England Real Estate Network #131028

—
May 12, 2005

Sold (Public Record)

Public Record #285515799

$490,000—
May 11, 2005

Sold

New England Real Estate Network #188800

$490,000—
Feb 23, 2005

Pending

New England Real Estate Network #188800

—
Feb 16, 2005

Listed (Active)

New England Real Estate Network #188800

$498,600—
Jan 21, 2004

Listed (Active)

New England Real Estate Network #131028

$473,300—
DateEvent & SourcePrice
11/21/2025

Listed (Active)

New England Real Estate Network #5070418

$2,400,000
11/22/2012

Expired

New England Real Estate Network #4160031

—
05/24/2012

Listed (Active)

New England Real Estate Network #4160031

$1,150,000
07/17/2008

Expired

New England Real Estate Network #131028

—
05/12/2005

Sold (Public Record)

Public Record #285515799

$490,000
05/11/2005

Sold

New England Real Estate Network #188800

$490,000
02/23/2005

Pending

New England Real Estate Network #188800

—
02/16/2005

Listed (Active)

New England Real Estate Network #188800

$498,600
01/21/2004

Listed (Active)

New England Real Estate Network #131028

$473,300

For completeness, Compass often displays two records for one sale: the MLS record and the public record.

Public Records for 18 Mainmast Circle

Taxable ValueLand$605,600Additions$472,100Total$1,077,700
Tax Record2024$5,809 ($484 / month)
Home Facts
Beds3Baths3Total Finished SqFt3,282 SqFtAbove Grade Finished SqFt3,282 SqFtStories2Lot Size10,890 SqFtStyleSingle Family ResidenceYear Built1968ZoningRD RECountyROCKINGHAMAPNNCAS M:00009 B:000007 L:000000

Schools near 18 Mainmast Circle

This home is within New Castle School District.
Rating
School
Type
Grades
Distance
Maude H. Trefethen School
Public - K to 6
Rating
School
Distance
Maude H. Trefethen School
PublicK to 6

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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More information about 18 Mainmast Circle, New Castle, NH 03854

18 Mainmast Circle is a single family home for sale in New Castle, NH 03854. This property was listed for sale on November 21, 2025 by The Aland Realty Group, it's currently listed at $2,400,000. It has been on the market for a total of 57 days and was last sold on May 12, 2005. This listing's school district is New Castle School District. Nearby schools include Maude H. Trefethen School. 18 Mainmast Circle is a 6-bed, 4-bath, 3,730 sqft single family home built in 1974.

No guarantee, warranty or representation of any kind is made regarding the completeness or accuracy of descriptions or measurements (including square footage measurements and property condition), such should be independently verified, and Compass, Inc., its subsidiaries, affiliates and their agents and associated third parties expressly disclaims any liability in connection therewith. Photos may be virtually staged or digitally enhanced and may not reflect actual property conditions. Offers of compensation are subject to change at the discretion of the seller. No financial or legal advice provided. Equal Housing Opportunity.

Listing Courtesy of The Aland Realty Group

Copyright 2026 PrimeMLS, 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 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 01/18/2026 03:46 AM