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Diane Tien

Global Real Estate Advisor

  • C:
  • O:
7605 SE 27th Street, Suite 102
Mercer Island, Washington 98040
United States
CONTACT ME View Listings Visit my Website

About Me

For Diane B. Tien, real estate isn’t just about properties — it’s about people, possibility, and solving puzzles with precision and heart.
A top producer for three years running, Diane brings a rare combination of deep expertise, strategic negotiation, and genuine care to every client she serves. She holds a Master of Negotiation certification from Harvard Business School Online and a Certification in Real Estate Finance and Development from MIT, where she also studied the role of cryptocurrency in real estate.
With a background that spans technology, art history, start-up culture, and global travel, Diane’s approach is both analytical and human-centered. Whether guiding a first-time buyer, assisting in complex relocations, or advising sellers on maximizing value, she listens deeply, thinks critically, and advocates fiercely.
Based on Mercer Island, Diane is deeply invested in her community. She serves on the board of Mercer Island Rotary, is a founding board member of Mercer Island Rowing Club, sponsors Mercer Island Youth and Family Services, and supports a range of efforts to strengthen and enrich lives locally.
Outside of real estate, Diane is an accomplished athlete and a believer in lifelong energy. She is a national silver medalist in pickleball, an active tennis player, and embraces challenges with the same passion she brings to her clients.
She lives with her three sons and their wonder dog, Kent, and writes about life’s journeys with her sister at Barrett-Sisters.com.
  • Awards
    • Top Producer Mercer Island 2022
    • USA Pickleball 3.0 55+ National Qualifier2023
    • PNW Tennis Champion ladies 9.0 55+ 2022
    • Citizen of the year, Kennedy Junior High, 1972
  • Hobbies
    • Tennis
    • Pickleball
    • Hiking
    • Global Spa hopping
    • Hammock swinging
    • Reading
  • Education
    • MIT Certification in Real Estate Finance and Development, 2021
    • MIT Cryptocurrency Course 2022

Testimonials

"Perfect! Thanks for making this as smooth a transition as possible!!"
  • Tim Hickey
  • Seattle
Diane helped me with every detail in the selling my house. From planning and helping find people to help me with the many tasks in preparing to sell and move. She was there at every step. My adult children...
  • Florence Chambers
  • Mercer Island
Working with Diane was a breath of fresh air. She takes her commitment to her clients seriously, and her communication is top notch. Standing by her clients every step of the way, she is a gem of a real...
  • Jani Franks
  • Bellevue
"You have been amazing. This whole process has been a huge relief to us."
  • Christy and Brad

Recent Listings

3 For Sale

38 Sold

LISTINGS

$6,000,000
8001 West Mercer Way
Mercer Island, WA 98040
  • 5 Beds
  • 3.00 Baths
  • 2,910 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty
New on Market
$3,795,000
6819 SE 32 Street
Mercer Island, WA 98040
  • 6 Beds
  • 4.50 Baths
  • 5,500 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty
$2,250,000
9360 SE 68th
Mercer Island, WA 98040
  • 4 Beds
  • 2.50 Baths
  • 3,070 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty
VIEW ALL LISTINGS
Sold
$5,150,000
4879 Forest Avenue SE
Mercer Island, WA 98040
  • 4 Beds
  • 3.50 Baths
  • 3,370 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$4,050,000
8617 SE 62nd Street
Mercer Island, WA 98040
  • 5 Beds
  • 4.00 Baths
  • 5,528 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$3,910,000
6205 SE 27th Street
Mercer Island, WA 98040
  • 6 Beds
  • 5.25 Baths
  • 4,852 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$3,750,000
5263 Forest Avenue SE
Mercer Island, WA 98040
  • 5 Beds
  • 4.00 Baths
  • 3,930 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$3,442,500
2211 72nd Avenue SE
Mercer Island, WA 98040
  • 5 Beds
  • 4.75 Baths
  • 4,730 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Buyer
Sold
$3,100,000
7430 80th Place SE
Mercer Island, WA 98040
  • 4 Beds
  • 2.50 Baths
  • 2,900 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$2,835,000
9628 SE 34th Street
Mercer Island, WA 98040
  • 4 Beds
  • 3.50 Baths
  • 3,770 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Buyer
Sold
$2,500,000
10503 Enatai Drive
Bellevue, WA 98004
  • 3 Beds
  • 2.50 Baths
  • 2,530 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$2,450,000
8426 SE 83rd Street
Mercer Island, WA 98040
  • 5 Beds
  • 2.75 Baths
  • 3,240 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$2,450,000
7460 81st Place SE
Mercer Island, WA 98040
  • 3 Beds
  • 2.50 Baths
  • 2,322 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Buyer
Sold
$2,400,000
4217 194th Place NE
Sammamish, WA 98074
  • 5 Beds
  • 3.25 Baths
  • 3,110 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$2,360,000
8355 SE 68th Street
Mercer Island, WA 98040
  • 5 Beds
  • 3.00 Baths
  • 2,710 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$2,270,000
9324 SE 68th Street
Mercer Island, WA 98040
  • 4 Beds
  • 2.75 Baths
  • 2,700 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$2,155,000
6040 86th Avenue SE
Mercer Island, WA 98040
  • 5 Beds
  • 2.25 Baths
  • 2,488 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$2,110,000
3632 73rd Avenue SE
Mercer Island, WA 98040
  • 5 Beds
  • 2.25 Baths
  • 2,850 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$2,085,000
8651 SE 63rd Street
Mercer Island, WA 98040
  • 4 Beds
  • 2.25 Baths
  • 2,250 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$2,000,000
6120 86th Avenue SE
Mercer Island, WA 98040
  • 4 Beds
  • 2.25 Baths
  • 3,200 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,980,000
15207 NE 72nd Street
Redmond, WA 98052
  • 5 Beds
  • 2.50 Baths
  • 2,980 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,800,000
11013 SE 66th Street
Newcastle, WA 98056
  • 5 Beds
  • 3.75 Baths
  • 3,668 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,700,000
624 35 Avenue
Seattle, WA 98122
  • 4 Beds
  • 1.50 Baths
  • 3,300 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,395,000
4001 97th Avenue SE
Mercer Island, WA 98040
  • 3 Beds
  • 1.75 Baths
  • 1,220 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,390,000
12005 NE 133rd Place
Kirkland, WA 98034
  • 4 Beds
  • 2.25 Baths
  • 2,330 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,289,000
80 Vine Street #502
Seattle, WA 98121
  • 2 Beds
  • 1.75 Baths
  • 1,675 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,175,000
14540 Wild Swan Lane NE
Bainbridge Island, WA 98110
  • 3 Beds
  • 3.25 Baths
  • 2,732 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,160,000
2565 Dexter Avenue N #501
Seattle, WA 98109
  • 3 Beds
  • 1.75 Baths
  • 1,947 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,150,000
2008 NW 62nd Street
Seattle, WA 98107
  • 3 Beds
  • 2.75 Baths
  • 1,744 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,150,000
8005 SE 33RD Place #B
Mercer Island, WA 98040
  • 2 Beds
  • 2.00 Baths
  • 1,683 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,125,000
13001 74th Street NE
Lake Stevens, WA 98258
  • 3 Beds
  • 2.25 Baths
  • 2,345 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,057,000
3805 NE 110th Street
Seattle, WA 98125
  • 4 Beds
  • 1.75 Baths
  • 2,520 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$925,000
27070 Woodpecker Hill Road NE
Poulsbo, WA 98370
  • 4 Beds
  • 2.50 Baths
  • 2,548 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$925,000
80 Vine Street #703
Seattle, WA 98121
  • 1 Bed
  • 1.25 Baths
  • 1,129 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$714,589
3236 80th Avenue SE #1
Mercer Island, WA 98040
  • 2 Beds
  • 1.75 Baths
  • 1,375 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$465,000
5000 NW Village Park Drive #D121
Issaquah, WA 98027
  • 2 Beds
  • 2.00 Baths
  • 874 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$465,000
5000 NW Village Park Drive #D121
Issaquah, WA 98027
  • 2 Beds
  • 2.00 Baths
  • 874 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$330,000
5000 Lake Washington Boulevard NE #E 103
Renton, WA 98056
  • 2 Beds
  • 1.00 Baths
  • 815 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$300,000
29700 Beach Drive NE
Poulsbo, WA 98370
  • 2 Acres
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$299,000
2609 NE 4th Street #215
Renton, WA 98056
  • 1 Bed
  • 1.00 Baths
  • 832 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$290,000
1106 NW Rhoton Court
Yelm, WA 98597
  • 3 Beds
  • 1.00 Baths
  • 1,008 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
VIEW ALL SOLD LISTINGS

My Neighborhoods

Mercer Island

Mercer Island

  • Price Range: $459K - $29M
  • Avg. Sales Price : $4M
View Details View 124 Listings

Mercer Island Waterfront

Mercer Island Waterfront

  • Price Range: $1.9M - $29M
  • Avg. Sales Price : $9.9M
View Details View 22 Listings

Bellevue

Bellevue

  • Price Range: $130K - $25M
  • Avg. Sales Price : $2.1M
View Details View 730 Listings

Bellevue Waterfront

Bellevue Waterfront

  • Price Range: $130K - $25M
  • Avg. Sales Price : $5.9M
View Details View 39 Listings

Bellevue School District

Bellevue School District

  • Price Range: $130K - $55M
  • Avg. Sales Price : $2.9M
View Details View 719 Listings

Kirkland

Kirkland

  • Price Range: $275K - $12M
  • Avg. Sales Price : $1.8M
View Details View 709 Listings

Kirkland Waterfront

Kirkland Waterfront

  • Price Range: $352K - $12M
  • Avg. Sales Price : $4M
View Details View 46 Listings

Redmond

Redmond

  • Price Range: $140K - $18M
  • Avg. Sales Price : $1.5M
View Details View 425 Listings

Sammamish

Sammamish

  • Price Range: $320K - $8M
  • Avg. Sales Price : $2M
View Details View 301 Listings

Seattle Puget Sound Waterfront

Seattle Puget Sound Waterfront

  • Price Range: $99K - $18M
  • Avg. Sales Price : $2.1M
View Details View 86 Listings

Seattle Lake Washington Waterfront

Seattle Lake Washington Waterfront

  • Price Range: $75K - $40M
  • Avg. Sales Price : $3.1M
View Details View 93 Listings

Somerset

Somerset

  • Price Range: $636K - $3.7M
  • Avg. Sales Price : $2.1M
View Details View 22 Listings
VIEW ALL NEIGHBORHOODS

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Work With Diane

Diane Tien
7605 SE 27th Street, Suite 102, Mercer Island, Washington 98040, United States
Contact Me