Yaffa Stegemann Real Estate Agent - Douglas Elliman Real Estate

99 Constantine Way, Mount Sinai, NY Pending $599,000 - listed by Yaffa Stegemann — Pending $599,000

Yaffa Stegemann listing and buyer's agent for 54 Louden Loop, Mount Sinai, NY - sold for $910,000 — Sold $910,000

85 Constantine Way, Mount Sinai, NY Pending $599,900 - listed by Yaffa Stegemann — Pending $599,900

Yaffa Stegemann buyer's agent for 7 Chips Ct, Port Jefferson, NY - sold for $849,999 — Sold $849,999

Yaffa Stegemann

East Setauket NY

Douglas Elliman Real Estate

33 Closed Sales

$25.8M Total Value

$585K - $1.4M Price Range

$783.1K Average Price

Prior 5 years

About Yaffa

As a Long Island Top Producer and Presidential Circle Award winner, Yaffa is well adept in all aspects of the North Shore Luxury Market. Given her vast experience and over 18 years in Luxury Real Estate and waterfront properties, Yaffa provides her wide network of clients with extensive knowledge, expertise and dedication in every real estate transaction, whether buying or selling. Speaking fluent Hebrew is another one of the many ways she serves her clients and the community.

Whether you are buying, selling or investing, she looks forward to putting her skills and knowledge to work for you!

Home Types: Townhouse, Condo, House

Languages Spoken: English, Hebrew

Years of Experience: 18

Transaction History

1 Year
2 Year
5 Year

Seller Deals
Total Deals	8
Total Value	$7,328,000
Average Sale Price	$916,000
Price Range	$680K - $1.4M

Seller Deals
Total Deals	13
Total Value	$11,146,000
Average Sale Price	$857,385
Price Range	$680K - $1.4M

Buyer Deals
Total Deals	1
Total Value	$849,999
Average Sale Price	$849,999

Seller Deals
Total Deals	29
Total Value	$22,124,000
Average Sale Price	$762,897
Price Range	$529K - $1.4M

Buyer Deals
Total Deals	4
Total Value	$3,716,999
Average Sale Price	$929,250
Price Range	$642K - $1.4M

5 Year View

Areas Yaffa is Experienced In

Yaffa's Listings and Deals

Yaffa's Active Listings

$599,000

Pending
- 2 Beds
- 2 Baths
- 1,389 Sq Ft
99 Constantine Way

Mount Sinai, NY
Welcome to this beautiful Dover Lower End Unit! Offers an open floor plan that seamlessly blends the formal dining room and living room area, highlighted by a tray ceiling, crown molding, and a cozy fireplace with double sliding doors that lead to a private back yard. The eat-in kitchen is adorned with granite countertops and custom cabinetry. First-floor master bedroom with a master bath, an

Yaffa Stegemann Douglas Elliman Real Estate

$599,900

Pending
- 2 Beds
- 2 Baths
- 1,441 Sq Ft
85 Constantine Way

Mount Sinai, NY
Condo Living at its Best! Pristin Dover Lower End Unit! Offers a sun-filled open floor plan that seamlessly blends the formal Dining room and the Living room area, highlighted by a Tray ceiling, crown molding, and a cozy fireplace. The eat-in-kitchen is adorned with granite countertops and custom cabinetry. First floor Master bedroom with a master bath, an additional bedroom, and one full bath.

Yaffa Stegemann Douglas Elliman Real Estate

Recently Sold

$910,000

Sold Sep 10, 2026
- 3 Beds
- 3 Baths
- 2,816 Sq Ft
54 Louden Loop

Mount Sinai, NY
- 2% Below List
- 75 Days On Market
- $323/SF
- Current Est. Value $901K
Yaffa Stegemann Douglas Elliman Real Estate

$900,000

Sold Jun 8, 2026
- 3 Beds
- 3 Baths
- 2,455 Sq Ft
46 Louden Loop

Mount Sinai, NY
- 20 Days On Market
- $367/SF
- Current Est. Value $894K
Yaffa Stegemann Douglas Elliman Real Estate

$749,000

Sold May 27, 2026
- 2 Beds
- 2.5 Baths
- 1,930 Sq Ft
77 Constantine Way

Mount Sinai, NY
- 12 Days On Market
- $388/SF
- Current Est. Value $749K
Yaffa Stegemann Douglas Elliman Real Estate

$739,000

Sold May 15, 2026
- 3 Beds
- 2 Baths
- 2,025 Sq Ft
13 William Ln

Mount Sinai, NY
- 11 Days On Market
- $365/SF
- Current Est. Value $742K
Yaffa Stegemann Douglas Elliman Real Estate

$1,150,000

Sold Feb 4, 2026
- 3 Beds
- 3.5 Baths
- 3,300 Sq Ft
4 Old Homestead Rd

Port Jefferson, NY
- 11% Below List
- 219 Days On Market
- $348/SF
- Current Est. Value $1M
Yaffa Stegemann Douglas Elliman Real Estate

$680,000

Sold Jan 21, 2026
- 3 Beds
- 2.5 Baths
- 2,168 Sq Ft
10 Pardam Knoll Rd

Miller Place, NY
- 5% Above List
- 30 Days On Market
- $314/SF
- Current Est. Value $680K
Yaffa Stegemann Douglas Elliman Real Estate

$1,390,000

Sold Jan 9, 2026
- 5 Beds
- 3.5 Baths
- 3,800 Sq Ft
7 Highwood Rd

Setauket, NY
- 18% Below List
- 147 Days On Market
- $366/SF
- Current Est. Value $1M
Yaffa Stegemann Douglas Elliman Real Estate

$810,000

Sold Jul 22, 2025
- 3 Beds
- 3 Baths
- 2,000 Sq Ft
5 Tina Ln

Unit 5

Mount Sinai, NY
- 1% Above List
- 91 Days On Market
- $405/SF
- Current Est. Value $847K
Yaffa Stegemann Douglas Elliman Real Estate

$720,000

Sold Jun 27, 2025
- 3 Beds
- 3.5 Baths
- 2,300 Sq Ft
12 Peters Path

Unit 12

Miller Place, NY
- 4% Below List
- 60 Days On Market
- $313/SF
- Current Est. Value $816K
Yaffa Stegemann Douglas Elliman Real Estate

Awards and Designations

CBR - Certified Buyer Representative

Agent License: New York 40ST0905184

Yaffa Stegemann

(631) 994-1861

Nearby Homes

Yaffa Stegemann

About Yaffa

Transaction History

Seller Deals

Seller Deals

Buyer Deals

Seller Deals

Buyer Deals

Production Over Time

5 Year View

Areas Yaffa is Experienced In

Yaffa's Listings and Deals

Yaffa's Active Listings

Recently Sold

Awards and Designations