BEDS6
BATHS3 full 1 partial
SQUARE FEET3,730
MLS#5070418
STATUSActive
PROPERTY TYPEResidential - Single Family
SCHOOLPortsmouth
Listing Courtesy of:
The Aland Realty Group
Agency Phone: 603-501-0463
Associate Name: Susan Spaulding
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.
Property Features
Property Type: Residential - Single Family
Basement: Basement Stairs
Cooling: None
Heating: Hot Air
Home Style: Contemporary
Lot Size: 0.25 Acres
Roof Type: Asphalt Shingle
Stories: 3.0
Year Built: 1974
Amenities
Wood Fireplace
Wood Stove Hook-up
Feature Descriptions
Appliances: Gas Cooktop, Dishwasher, Double Oven, Refrigerator
Baths 1/2: 1
Baths 3/4: 1
Baths Full: 2
Color: natural
Construction: Cedar Exterior
Construction Status: Existing
Days on Site: 103
Driveway: Gravel
Electric: 200+ Amp Service
Exterior: Cedar Exterior
Flood Zone: No
Flooring: Hardwood, Tile
Foundation: Concrete
Lot: Wooded
Number of Rooms: 9
Road Frontage: 111
Roads: Paved, Public
Sewer: Pump Up
Sq. Ft. Above Grade Finished: 3243
Sq. Ft. Below Grade Finished: 487
Sq. Ft. Total Finished: 3730
Total Stories: 3
Water: Public
Zoning: residential
Local Schools
High School: Portsmouth High School
Middle School: Rye Junior High School
Elementary School: Maude H. Trefethen School
School District: Portsmouth
Listed By / Shown By
Listed By
Agency Name: The Aland Realty Group
Agency Phone: 603-501-0463
Agent Name: Susan Spaulding
Shown By
Agency Title: Better Homes and Gardens Real Estate The Masiello Group
Agency Phone: 800-741-1540
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Estimated Payment
$ 6,041.36 per month $5,341.36 Principal & Interest $0.00 Property Tax (data not provided by mls) $700.00 Homeowner's Insurance
Listing data compilation and photo(s) 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 2026-03-03 23:33:44 
18 Mainmast Circle | MLS# 5070418
This single family home located at 18 Mainmast Circle, New Castle, NH 03854 is currently listed for sale with an asking price of $2,400,000. This property was built in 1974 and has 6 bedrooms and 3 full and 1 partial baths with 3730 sq. ft. Mainmast Circle is located within the Portsmouth school district. Search New Castle real estate on www.masiellogrouprealestate.com today.