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$4,200,000 Just Listed
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Full Property Details for 350 Portsmouth Ave
General
- Price: $4,200,000
- Taxes: $15,636 (2025)
- Status: Active
- Type: Single Family
- Source: PrimeMLS
- MLS ID: 5107161
- Updated: 9/3/2026
- Added to Site: 6 day(s) ago
Interior
- Number of Rooms: 7
- Interior Features: Cathedral Ceiling, Ceiling Fan, Dining Area, Wood Fireplace, 1 Fireplace, Kitchen Island, Primary BR w/ BA, Natural Light
- Fireplace: Yes
- Appliances: Electric Cooktop, Dishwasher, Double Oven, Wall Oven, Refrigerator
- Flooring: Carpet, Tile
Rooms
Bathrooms
- Total Bathrooms: 5
- Full Bathrooms: 1
- 3/4 Bathrooms: 3
- Half Bathrooms: 1
Bedrooms
- Total Bedrooms: 3
Additional Information
- Equipment: Irrigation Meter
Exterior
- Exterior Features: Boat Mooring, Boat Slip/Dock, Hot Tub, Private Dock, Sauna
- Color: Gray
Parking
- Garage: Yes
- Garage Spaces: 2
- Parking: Auto Open, Direct Entry, Driveway, Attached
Location
- County: Rockingham
School Information
- School District: New Castle
- Elementary School: Maude H. Trefethen School
- Middle School: Rye Junior High School
- High School: Portsmouth High School
Heating & Cooling
- Cooling Type: Central AC
- Heating Type: Oil, Forced Air
Utilities
- Sewer: Public
Structural Information
- Construction Status: Existing
- Basement Entrance: Walkout
- Basement Desc.: Climate-Controlled, Daylight, Full, Interior Stairs, Partially Finished, Walkout
- Roof: Asphalt Shingles
- Stories/Levels: 2
- Square Feet: 3,238
- Finished Total: 3,238 Sq. Ft.
- Finished Above Grnd: 2,375 Sq. Ft.
- Finished Below Grnd: 863 Sq. Ft.
- Year Built: 1977
Lot Features
- Lot Size (Acres): 0.25
- Lot Size (Sq. Ft.): 10,890
- Frontage: Yes Road Frontage
- Frontage Feet: 100
- Driveway/Sidewalk: Paved
- Zoning: RD RE
Water Features
- Water Front: Yes
- Water View: Yes
- Water Access: Yes
- Water Front Type: River
- Water Front Name: Piscataqua River
- Water Front Owned: 1
Financial Considerations
- Price Per Sq. Ft.: $1,768.42
- Assessment Year: 2025
- Assessment Amount: $2,900,900
- Tax Amount: $15,636
- Tax Year: 2025
Disclosures and Reports
- Lot Number: 10
Listed by Great Island Realty LLC, Janet Sylvester and Margaret Pesce
Schools serving 350 Portsmouth Ave
| Name | Grades | Distance |
|---|---|---|
Maude H. Trefethen School 142 Cranfield Street, New Castle, NH 03854 | K-5 | 0.6 mi |
Rye Junior High School 501 Washington Road, Rye, NH 03870 | 5-8 | 4.4 mi |
Portsmouth Middle School, Portsmouth, NH 155 Parrott Avenue, Portsmouth, NH 03801 | 7-8 | 1.3 mi |
Price & Sales History for 350 Portsmouth Ave
Tax History for 350 Portsmouth Ave
Estimate the Cost for 350 Portsmouth Ave
350 Portsmouth Avenue, New Castle, NH 03854 (MLS# 5107161) is a Single Family property with 3 bedrooms, 1 full bathroom and 4 partial bathrooms. 350 Portsmouth Avenue is currently listed for $4,200,000 and was received on August 28, 2026. Want to learn more about 350 Portsmouth Avenue? 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.

