New Castle Homes for Sale

Welcome to New Castle, New Hampshire – a hidden gem nestled in Rockingham County, where coastal charm meets historic elegance. This picturesque town, located on an island just off the coast of Portsmouth, boasts stunning waterfront views, rich history, and a vibrant community atmosphere that captures the heart of all who visit. With its quaint streets lined with beautiful colonial homes and breathtaking vistas of the Atlantic Ocean, New Castle is a place where tranquility and beauty abound.

New Castle is renowned for its historical significance, featuring landmarks such as Fort Constitution and the iconic New Castle Common, where residents and visitors alike gather to enjoy the scenic surroundings. The town is also home to a tight-knit community that values local traditions, making it an ideal place for families and individuals seeking a welcoming environment.

For those looking to make New Castle their home, a variety of homes for sale are available, ranging from charming seaside cottages to elegant estates with panoramic ocean views. Each property reflects the unique character of this coastal town, offering modern amenities while preserving the charm of its historic roots. Whether you’re searching for a serene retreat or a vibrant community, New Castle has something to offer everyone.

Explore the delightful homes for sale in New Castle and discover the perfect place to create lasting memories. With its stunning landscapes, rich history, and welcoming community, New Castle is not just a place to live—it’s a lifestyle waiting to be embraced. Come and experience the magic of New Castle, where every day feels like a vacation!

Newest New Castle Homes for Sale

$2,400,000

3 Beds ⋅ 3 Baths ⋅ 5112106 MLS

Set in a coveted New Castle neighborhood, this low-maintenance single-family home offers an exceptional blend of quality, style, and coastal living. Enter the Foyer, which seamlessly connects to the sun-filled, open concept kitchen, dining and living area. The interior living spaces feature a beautiful, recently renovated kitchen appointed with Italian appliances, natural marble countertops, and a generously sized island. An adjacent patio sets the stage for al fresco dining. The expansive dining area flows into the living room, which features built-ins, a gas fireplace and a vaulted ceiling. There is direct acces from the living area to the deck which makes an ideal entertaining home. Hardwood floors run throughout the main level. The first-floor primary suite features a walk-in closet, an additional closet, and a spacious bath with an oversized tiled shower. A mudroom with laundry connects to the two-car garage, and a discreetly located powder room completes the main level. Upstairs, two generously sized bedrooms share a full bath, complemented by a versatile office or den area, ideal for working from home or a quiet retreat. The finished lower level offers flexible space for a media room or home gym, plus an additional unfinished area for storage. Association amenities include a private beach, tennis courts, an in-ground pool, and clubhouse, all included in the HOA fee. Enjoy walking-distance access to fine dining at the Wentworth by the Sea Hotel and the other restaurants along the marina, with downtown Portsmouth just minutes away. An exceptional opportunity to enjoy New Castle's sought-after coastal lifestyle, with its charming seaside setting, low property taxes, and outstanding amenities. Photos to come on line October 2nd.

50 N Gate Rd, New Castle

$3,950,000

3 Beds ⋅ 4 Baths ⋅ 5107161 MLS

Welcome to 350 Portsmouth Avenue, an exceptional waterfront residence offering a front row seat to one of the most captivating maritime settings on the New Hampshire Seacoast. With expansive water views of the Piscataqua River and Back Channel, this remarkable property captures everything that makes New Castle waterfront living so special. From magnificent ships and iconic Portsmouth tugboats to sailboats, fishing vessels and pleasure craft, the ever changing boat traffic provides a spectacular backdrop from morning until night. A private deep water dock makes this a dream for boating enthusiasts, offering direct access to Portsmouth Harbor, the Piscataqua River and the open Atlantic. Adding to the property's unique appeal is deeded access to the Back Channel, creating a wonderful launching point for kayaks and paddleboards. Designed to embrace this extraordinary setting, the home features multiple waterfront decks for entertaining, outdoor dining or simply watching the river come alive. A walk-out lower level extends the living space outdoors, while the hot tub and sauna create a private waterfront retreat to enjoy throughout the seasons. Enjoy all the amenities that make New Castle one of the Seacoast's most coveted communities, the nearby yacht clubs, Wentworth Marina, Wentworth by the Sea Country Club, Great Island Common, beaches and the historic charm of island living, all just minutes from downtown Portsmouth. And with New Castle's exceptionally low property taxes, this is a rare opportunity to combine an extraordinary waterfront lifestyle with one of New Hampshire's most desirable communities. Deep water boating out your front door. Kayaking and paddleboarding from your deeded Back Channel access. Incredible water views, spectacular boat traffic, waterfront decks, hot tub and sauna, all in the heart of New Castle. 350 Portsmouth Avenue isn't simply a waterfront home, it's a lifestyle defined by the water.

350 Portsmouth Ave, New Castle

Start Your Search

board logo 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, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data last updated .