Single Family for Sale: 18 Mainmast Circle, New Castle, NH 03854
Lot & Building Features
Community and Schools
Price History of 18 Mainmast Circle, New Castle, NH
| Date | Name | Price | Difference |
|---|---|---|---|
| 11/21/2025 | Listing Price | $2,400,000 | N/A |
*Information provided by REWS for your reference only. The accuracy of this information cannot be verified and is not guaranteed. |
Comparable Properties Sold Near By
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| Address | City | Zip | Beds | Baths | Price | Sq. Ft. | $/SQFT | Sold Date |
|---|---|---|---|---|---|---|---|---|
| This Listing | New Castle | 03854 | 6 | 4.0 | $2,400,000 | 3,730 | $643 | N/A |
| 368 South Street | Portsmouth | 03801 | 5 | 3.0 | $2,650,000 | 3,789 | $699 | 07/14/2025 |
| 320 South Street | Portsmouth | 03801 | 5 | 3.0 | $1,855,000 | 3,560 | $521 | 09/22/2025 |
18 Mainmast Circle (MLS #5070418) is a multi-level, contemporary single family home located in New Castle, NH. This single family home is 3,730 sqft and on a lot of 10,890 sqft (or 0.25 acres) with 6 bedrooms, 4 baths and is 51 years old. This property was listed on 11/21/2025 and has been priced for sale at $2,400,000.
The 5 bedroom single family home at 320 South Street in Portsmouth is nearby and sold for $1,855,000 on 09/22/2025. Another nearby 5 bedroom single family home, 368 South Street in Portsmouth sold for $2,650,000 on 07/14/2025.
Nearby zip codes are 03801, 03840, 03870, 03904 and 03905. This property neighbors other cities such as Eliot, Kittery, Portsmouth, Rye and York.
 Listing Last updated . Some properties which appear for sale on this web site may subsequently have sold or may no longer be available. Walk Score map and data provided by Walk Score. Google map provided by Google. Bing map provided by Microsoft Corporation. All information provided is deemed reliable but is not guaranteed and should be independently verified. Listing information 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 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 03/07/2026 |