Janet Sylvester Real Estate Agent - Great Island Realty LLC

65 Little Harbor Rd, New Castle, NH Pending $3,500,000 - listed by Janet Sylvester — Pending $3,500,000

Janet Sylvester co-listing agent for 177 Spur Rd, Dover, NH - sold for $1,100,000 — Sold $1,100,000 • Co-Listing Agent

90 Fleet St Unit 5-2, Portsmouth, NH For Sale $399,000 - listed by Janet Sylvester — For Sale $399,000

Janet Sylvester buyer's agent for 24 Wisteria Dr, Dover, NH - sold for $3,995,000 — Sold $3,995,000

115 Fairview Ave, Portsmouth, NH Pending $799,000 - listed by Janet Sylvester — Pending $799,000

Janet Sylvester

Portsmouth NH

Great Island Realty LLC

84 Closed Sales

$127.6M Total Value

$390K - $6.3M Price Range

$1.5M Average Price

Prior 5 years

About Janet

As past President of a successful multi-million dollar Corporation and as Owner of a Real Estate Investment Company, Janet has the business background and negotiation skills necessary to ensure that our Clients have the best possible representation.

At Great Island Realty Janet and Margaret work as a Team… every Great Island Realty Client receives the benefits of both strong skill sets and of having two Brokers working constantly on their behalf. Their attention to detail, proactive approach to bringing deals together and the level of care they provide on behalf of each and every Client is unsurpassed.

As long time residents of New Castle, both Janet and Margaret understand what makes the Seacoast of New Hampshire special and unique.

Home Types: House, Townhouse, MultiFamily, Lot/Land, Commercial, Condo

Years of Experience: 18

Education: Arizona State University

Transaction History

1 Year
2 Year
5 Year

Seller Deals
Total Deals	13
Total Value	$19,045,000
Average Sale Price	$1,465,000
Price Range	$375K - $2.8M

Buyer Deals
Total Deals	6
Total Value	$13,090,000
Average Sale Price	$2,181,667
Price Range	$570K - $4M

1 Year View by Quarter

Seller Deals
Total Deals	25
Total Value	$39,770,000
Average Sale Price	$1,590,800
Price Range	$375K - $3.7M

Buyer Deals
Total Deals	11
Total Value	$18,105,000
Average Sale Price	$1,645,909
Price Range	$480K - $4M

2 Year View by Quarter

Seller Deals
Total Deals	49
Total Value	$69,164,200
Average Sale Price	$1,411,514
Price Range	$375K - $3.7M

Buyer Deals
Total Deals	35
Total Value	$58,430,819
Average Sale Price	$1,669,452
Price Range	$250K - $6.3M

5 Year View

Neighborhoods Janet is Experienced In

Janet's Active Listings

$399,000
- 1 Bed
- 1 Bath
- 588 Sq Ft
90 Fleet St

Unit 5-2

Portsmouth, NH
Arguably the best unit in the building! This stunning corner unit offers spectacular views overlooking Congress Street and is flooded with natural light from multiple exposures. The updated kitchen features granite countertops, cherry cabinetry, and stainless steel appliances. Enjoy the convenience of downtown living with Portsmouth's finest restaurants, boutiques, cafés, and waterfront

Janet Sylvester Great Island Realty LLC

$2,900,000
- Land
- 2.56 Acres
- $1,132,812 per Acre
82 Shipwright Way

Newington, NH
Seacoast NH Luxury waterfront lot with Deep-Water Dock Option.With over 900 feet of water frontage and 2.5 acres, an extraordinary opportunity awaits on the Seacoast of New Hampshire. This premier waterfront lot offers sweeping views, unmatched privacy, and the rare advantage of deep-water dock availability. Set along one of the region’s most desirable stretches of shoreline, the property

Janet Sylvester Great Island Realty LLC

$3,500,000
- 4 Beds
- 4.5 Baths
- 3,734 Sq Ft
65 Little Harbor Rd

New Castle, NH
Nestled within one of New Castle's most coveted and desirable neighborhoods, this extraordinary residence offers approximately 3,700 square feet of refined living space with sweeping water views from nearly every principal room. Thoughtfully designed to maximize natural light, the home is filled with sunshine throughout the day, creating a warm and inviting atmosphere while showcasing the

Janet Sylvester Great Island Realty LLC

$799,000
- 3 Beds
- 2 Baths
- 1,772 Sq Ft
115 Fairview Ave

Portsmouth, NH
Great opportunity! Nestled in one of Portsmouth's most desirable neighborhoods, this home offers easy access to downtown, local restaurants, shops, entertainment, and major commuting routes. The property blends modern updates with timeless appeal. The heart of the home is a stunning custom-designed kitchen featuring premium soft-close cabinetry, distinctive tile work and quality finishes that

Janet Sylvester Great Island Realty LLC

Recently Sold

$1,200,000

Sold Apr 21, 2026
- Land
- 0.27 Acre Lot
24 Seabreeze Ln

New Castle, NH
- 4 Days On Market
Janet Sylvester Great Island Realty LLC

$875,000

Sold Mar 31, 2026
- 3 Beds
- 2.5 Baths
- 2,072 Sq Ft
417 Lafayette Rd

Portsmouth, NH
- $422/SF
- 4 Days On Market
- Current Est. Value $860K
Janet Sylvester Great Island Realty LLC

$2,800,000

Sold Nov 14, 2025
- 3 Beds
- 3 Baths
- 3,018 Sq Ft
28 Ocean St

New Castle, NH
- $928/SF
- 4 Days On Market
- Current Est. Value $3M
Janet Sylvester Great Island Realty LLC

$1,900,000

Sold Oct 24, 2025
- 3 Beds
- 2.5 Baths
- 2,204 Sq Ft
17 Oliver St

New Castle, NH
- $862/SF
- 0 Days On Market
- Current Est. Value $2M
Janet Sylvester Great Island Realty LLC

$720,000

Sold Sep 26, 2025
- 3 Beds
- 2 Baths
- 2,539 Sq Ft
15 Casey Rd

East Kingston, NH
- 10% Below List
- $284/SF
- 8 Days On Market
Janet Sylvester Great Island Realty LLC

$2,150,000

Sold Sep 18, 2025
- 3 Beds
- 3.5 Baths
- 3,144 Sq Ft
22 Colonial Ln

New Castle, NH
- 2% Below List
- $684/SF
- 3 Days On Market
- Current Est. Value $2M
Janet Sylvester Great Island Realty LLC

$375,000

Sold Jul 23, 2025
- 2 Beds
- 1 Bath
- 644 Sq Ft
40 Concord Way

Portsmouth, NH
- 16% Below List
- $582/SF
- 84 Days On Market
- Current Est. Value $375K
Janet Sylvester Great Island Realty LLC

$390,000

Sold Jul 18, 2025
- 2 Beds
- 1 Bath
- 644 Sq Ft
38 Concord Way

Portsmouth, NH
- 18% Below List
- $606/SF
- 84 Days On Market
- Current Est. Value $383K
Janet Sylvester Great Island Realty LLC

$695,000

Sold Jun 27, 2025
- 4 Beds
- 1 Bath
- 1,870 Sq Ft
409 Lafayette Rd

Portsmouth, NH
- 1% Below List
- $372/SF
- 15 Days On Market
- Current Est. Value $902K
Janet Sylvester Great Island Realty LLC

Agent License: New Hampshire 061241

Janet Sylvester

(603) 691-1694

Great Island Realty LLC

(603) 691-1694

Homes for Sale by City

Janet Sylvester

About Janet

Transaction History

Seller Deals

Buyer Deals

Production Over Time

1 Year View by Quarter

Seller Deals

Buyer Deals

Production Over Time

2 Year View by Quarter

Seller Deals

Buyer Deals

Production Over Time

5 Year View

Neighborhoods Janet is Experienced In

Janet's Listings and Deals

Janet's Active Listings

Recently Sold