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Diane Tien

Global Real Estate Advisor

  • C:
  • O:
7605 SE 27th Street, Suite 101
Mercer Island, Washington 98040
United States
CONTACT ME View Listings Visit my Website

About Me


Diane B. Tien approaches real estate as both an art and a strategy — a thoughtful balance of insight, negotiation, and genuine care for the people she serves.
Recognized as the top-producing broker on Mercer Island, Diane brings a rare combination of strategic negotiation, financial expertise, and creative problem-solving to every client she represents. She holds a Master of Negotiation certification from Harvard Business School Online and a Certificate in Real Estate Finance and Development from MIT, where she also studied Generative AI for Digital Transformation and emerging technologies including cryptocurrency in real estate.
Diane’s professional background spans technology, art history, startup culture, and international travel, shaping a perspective that is both analytical and deeply human-centered. Whether guiding buyers, advising sellers on maximizing value, or helping clients navigate complex relocations, Diane listens carefully, 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 the Mercer Island Rowing Club, and supports Mercer Island Youth and Family Services and other initiatives that strengthen the local community.
Outside of real estate, Diane is an accomplished athlete and lifelong competitor. She is a national silver medalist in pickleball, an active tennis player, and embraces challenges with the same energy and determination she brings to her clients.
Diane lives on Mercer Island 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

1 For Sale

54 Sold

LISTINGS

$3,500,000
8001 West Mercer Street
Mercer Island, WA 98040
  • 4 Beds
  • 1.75 Baths
  • 2,190 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
$3,350,000
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 Represented Seller
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
$3,050,000
8150 Evergreen Lane
Mercer Island, WA 98040
  • 5 Beds
  • 3.50 Baths
  • 4,910 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
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
$2,683,000
8021 SE 57th Street
Mercer Island, WA 98040
  • 4 Beds
  • 3.25 Baths
  • 3,980 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
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
$2,425,000
3208 89th Place SE
Mercer Island, WA 98040
  • 5 Beds
  • 5.00 Baths
  • 3,310 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
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
$2,300,000
7529 SE 40th Street
Mercer Island, WA 98040
  • 3 Beds
  • 1.75 Baths
  • 1,900 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
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
$2,150,000
9360 SE 68th
Mercer Island, WA 98040
  • 4 Beds
  • 2.50 Baths
  • 3,070 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$2,125,000
8510 SE 72nd Street
Mercer Island, WA 98040
  • 3 Beds
  • 2.50 Baths
  • 2,810 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
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
$1,920,000
2024 80th Street SE
Mercer Island, WA 98040
  • 4 Beds
  • 3.25 Baths
  • 4,100 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
Sold
$1,918,000
3412 79th Avenue SE
Mercer Island, WA 98040
  • 4 Beds
  • 2.50 Baths
  • 2,400 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,907,000
1437 240th Avenue NE
Sammamish, WA 98074
  • 4 Beds
  • 2.75 Baths
  • 2,960 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,865,000
2695 20th Avenue NE
Issaquah, WA 98029
  • 4 Beds
  • 3.25 Baths
  • 3,141 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
$1,550,000
2527 72nd Avenue SE
Mercer Island, WA 98040
  • 3 Beds
  • 1.00 Baths
  • 930 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$1,400,000
9712 SE 41st ST
Mercer Island, WA 98040
  • 3 Beds
  • 1.75 Baths
  • 1,410 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
$680,000
1709 134th Street SE #3
Bellevue, WA 98005
  • 2 Beds
  • 1.75 Baths
  • 1,252 Sq. Ft.
Listed Courtesy of Northwest MLS Represented Buyer
Sold
$525,000
491 W Columbia Street
Monroe, WA 98272
  • 2 Beds
  • 1.00 Baths
  • 1,294 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
Sold
$280,000
921 130th Street SW #H201
Everett, WA 98204
  • 2 Beds
  • 1.50 Baths
  • 819 Sq. Ft.
Listing Courtesy of Realogics Sotheby's International Realty Represented Seller
VIEW ALL SOLD LISTINGS

My Neighborhoods

Mercer Island

Mercer Island

  • Price Range: $280K - $28M
  • Avg. Sales Price : $4.5M
View Details View 101 Listings

Mercer Island Waterfront

Mercer Island Waterfront

  • Price Range: $2.8M - $28M
  • Avg. Sales Price : $11.5M
View Details View 19 Listings

Bellevue

Bellevue

  • Price Range: $200K - $65M
  • Avg. Sales Price : $2M
View Details View 749 Listings

Bellevue Waterfront

Bellevue Waterfront

  • Price Range: $899K - $65M
  • Avg. Sales Price : $9.4M
View Details View 24 Listings

Bellevue School District

Bellevue School District

  • Price Range: $23K - $71M
  • Avg. Sales Price : $2.9M
View Details View 761 Listings

Kirkland

Kirkland

  • Price Range: $24K - $7.1M
  • Avg. Sales Price : $1.5M
View Details View 657 Listings

Kirkland Waterfront

Kirkland Waterfront

  • Price Range: $400K - $7.1M
  • Avg. Sales Price : $2.2M
View Details View 41 Listings

Redmond

Redmond

  • Price Range: $174K - $16M
  • Avg. Sales Price : $1.5M
View Details View 392 Listings

Sammamish

Sammamish

  • Price Range: $285K - $7.8M
  • Avg. Sales Price : $1.8M
View Details View 265 Listings

Seattle Puget Sound Waterfront

Seattle Puget Sound Waterfront

  • Price Range: $125K - $13.5M
  • Avg. Sales Price : $2.2M
View Details View 51 Listings

Seattle Lake Washington Waterfront

Seattle Lake Washington Waterfront

  • Price Range: $280K - $45M
  • Avg. Sales Price : $3.5M
View Details View 85 Listings

Somerset

Somerset

  • Price Range: $1.4M - $3.1M
  • Avg. Sales Price : $2.2M
View Details View 17 Listings
VIEW ALL NEIGHBORHOODS

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Work With Diane

Diane Tien
7605 SE 27th Street, Suite 101, Mercer Island, Washington 98040, United States
Contact Me