Diane Tien

Global Real Estate Advisor

  • C:
  • O:
7605 SE 27th Street, Suite 102
Mercer Island, Washington 98040
United States

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

Recent Listings

3 For Sale

38 Sold

LISTINGS

My Neighborhoods

Mercer Island

Mercer Island

  • Price Range: $459K - $29M
  • Avg. Sales Price : $4M

Mercer Island Waterfront

Mercer Island Waterfront

  • Price Range: $1.9M - $29M
  • Avg. Sales Price : $9.9M

Bellevue

Bellevue

  • Price Range: $130K - $25M
  • Avg. Sales Price : $2.1M

Bellevue Waterfront

Bellevue Waterfront

  • Price Range: $130K - $25M
  • Avg. Sales Price : $5.9M

Bellevue School District

Bellevue School District

  • Price Range: $130K - $55M
  • Avg. Sales Price : $2.9M

Kirkland

Kirkland

  • Price Range: $275K - $12M
  • Avg. Sales Price : $1.8M

Kirkland Waterfront

Kirkland Waterfront

  • Price Range: $352K - $12M
  • Avg. Sales Price : $4M

Redmond

Redmond

  • Price Range: $140K - $18M
  • Avg. Sales Price : $1.5M

Sammamish

Sammamish

  • Price Range: $320K - $8M
  • Avg. Sales Price : $2M

Seattle Puget Sound Waterfront

Seattle Puget Sound Waterfront

  • Price Range: $99K - $18M
  • Avg. Sales Price : $2.1M

Seattle Lake Washington Waterfront

Seattle Lake Washington Waterfront

  • Price Range: $75K - $40M
  • Avg. Sales Price : $3.1M

Somerset

Somerset

  • Price Range: $636K - $3.7M
  • Avg. Sales Price : $2.1M

News

Work With Diane

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