18 Mainmast Circle, New Castle, NH 03854 - Photo 1

1/1

$2,100,000

Sold
Closed
Single Family
6 Beds
2 Full Baths
2 Partial Baths
3,730 Sq. Ft.
0.25 Acres

1/1

Property 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 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.

Full Property Details

Full Property Details for 18 Mainmast Cir

General

Sold For: $2,100,000
Status: Closed
Type: Single Family
Source: PrimeMLS
MLS ID: 5070418
Added to Site: 208 day(s) ago

Interior

Number of Rooms: 9
Interior Features: Wood Fireplace, Wood Stove Hookup
Fireplace: Yes
Appliances: Gas Cooktop, Dishwasher, Double Oven, Refrigerator
Flooring: Hardwood, Tile

Rooms

Bathrooms

Total Bathrooms: 4
Full Bathrooms: 2
3/4 Bathrooms: 1
Half Bathrooms: 1

Bedrooms

Total Bedrooms: 6

Exterior

Color: natural

Location

County: Rockingham
Driving 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,

School Information

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

Heating & Cooling

Cooling Type: None
Heating Type: Hot Air

Utilities

Sewer: Pump Up

Structural Information

Construction Status: Existing
Basement Entrance: Interior
Basement Desc.: Basement Stairs
Roof: Asphalt Shingles
Stories/Levels: 3
Square Feet: 3,730
Finished Total: 3,730 Sq. Ft.
Finished Above Grnd: 3,243 Sq. Ft.
Finished Below Grnd: 487 Sq. Ft.
Year Built: 1968

Lot Features

Lot Size (Acres): 0.25
Lot Size (Sq. Ft.): 10,890
Frontage: Yes Road Frontage
Frontage Feet: 111
Driveway/Sidewalk: Gravel
Zoning: residential

Financial Considerations

Price Per Sq. Ft.: $589.81

Disclosures and Reports

Surveyed: Yes
Lot Number: 7

Listed by The Aland Realty Group, Susan Spaulding
Sold by Tate & Foss Sotheby's International Rlty, Maggie. Barrett Campbell

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Listed by The Aland Realty Group, Susan Spaulding
Sold by Tate & Foss Sotheby's International Rlty, Maggie. Barrett Campbell

Listing agent

— 18 Mainmast Cir —

Susan Spaulding

The Aland Realty Group

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Schools

Schools serving 18 Mainmast Cir

School District:New Castle School District

Name	Grades	Distance
Maude H. Trefethen School 142 Cranfield Street, New Castle, NH 03854	K-5	0.2 mi

Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 18 Mainmast Cir

Date

Details

Price

Change

Source

5/14/2026

Sold

$2,100,000

-4.55%

MLS

3/13/2026

Price Reduced

$2,200,000

-8.33%

MLS

11/21/2025

Listed

$2,400,000

—

MLS

Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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18 Mainmast Circle, New Castle, NH 03854 (MLS# 5070418) is a Single Family property that was sold at $2,100,000 on May 14, 2026. Want to learn more about 18 Mainmast Circle? Do you have questions about finding other Single Family real estate for sale in New Castle? You can browse all New Castle real estate or contact a Coldwell Banker agent to request more information.

18 Mainmast Cir New Castle, NH 03854