Janet Sylvester

Portsmouth NH

Great Island Realty LLC

85 Closed Sales

$111.9M Total Value

$250K - $6.3M Price Range

$1.3M Average Price

Prior five 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, Condo, MultiFamily, Townhouse, Lot/Land, Commercial, Manufactured

Years of Experience: 17

Education: Arizona State University

Transaction History

1 Year
2 Year
5 Year

Seller Deals

Total Deals

Total Value

$25,975,000

Average Sale Price

$1,623,438

Price Range

$455K - $3.7M

Buyer Deals

Total Deals

Total Value

$4,255,000

Average Sale Price

$1,063,750

Price Range

$480K - $1.6M

1 Year View by Quarter

Seller Deals

Total Deals

Total Value

$31,815,000

Average Sale Price

$1,590,750

Price Range

$455K - $3.7M

Buyer Deals

Total Deals

Total Value

$24,214,299

Average Sale Price

$2,017,858

Price Range

$354K - $4.8M

2 Year View by Quarter

Seller Deals

Total Deals

Total Value

$65,434,900

Average Sale Price

$1,234,621

Price Range

$266K - $3.7M

Buyer Deals

Total Deals

Total Value

$46,434,819

Average Sale Price

$1,451,088

Price Range

$250K - $6.3M

5 Year View

Neighborhoods Janet Has the Most Experience In

New Castle Island

17 Sales
West End

7 Sales
Downtown Portsmouth

7 Sales
Dover

6 Sales
Rye

4 Sales
Barrington

4 Sales

Janet's Active Listings

$399,000
- 2 Beds
- 1 Bath
- 644 Sq Ft
40 Concord Way

Portsmouth, NH
Move right in—this turnkey gem is ready for you!This updated unit features one garage bay and a long list of improvements, including new plumbing, electrical systems, roofing, and stylish cosmetic upgrades throughout. Enjoy a sleek, modern space with contemporary appliances—all in a move-in-ready package. Perfectly located for commuters, with easy access to downtown Portsmouth’s vibrant

Janet Sylvester Great Island Realty LLC

Co-Listing Agent

$2,350,000
- 3 Beds
- 3.5 Baths
- 3,144 Sq Ft
22 Colonial Ln

New Castle, NH
This elegant custom William Ross design home blends classic historical influence with the functionality of modern living. Just 12 years young, it showcases exceptional craftsmanship, thoughtful design, and top-tier finishes throughout. Privately set at the end of Colonial Lane, the home is surrounded by gardens offering the perfect balance of seclusion and convenience. Just minutes from downtown

Janet Sylvester Great Island Realty LLC

$399,000
- 2 Beds
- 1 Bath
- 644 Sq Ft
38 Concord Way

Portsmouth, NH
Move right in—everything has already been done for you! This turnkey unit features two garage bays and a host of updates, including new plumbing, electrical, roofing, and stylish cosmetic upgrades throughout. Enjoy modern stainless steel appliances and a sleek, move-in-ready space. Conveniently located for commuters with easy access to downtown Portsmouth's shops, restaurants, and businesses.

Janet Sylvester Great Island Realty LLC

Co-Listing Agent

$1,195,000
- 3 Beds
- 3 Baths
- 1,907 Sq Ft
526 State St

Portsmouth, NH
Nestled in the heart of downtown Portsmouth, this stunning historical brick duplex offers a rare opportunity to own a piece of the city’s rich heritage while enjoying the vibrant lifestyle of one of New England's most sought-after locations. With its prime location, ample parking, and endless potential, this property is perfect for owner-occupants, investors, or those looking to convert into

Janet Sylvester Great Island Realty LLC

Agent License #061241

Janet Sylvester

(603) 691-1694

Great Island Realty LLC

(603) 691-1694

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 Has the Most Experience In

Janet's Listings and Deals

Janet's Active Listings