Helping Seattle CoBuyers Achieve Homeownership Together

Since 2018, CoBuy-certified™ Pro Don Koonce has helped more than 40 Seattle co-buyers achieve homeownership together with CoBuy.

Last Updated
November 4, 2025
Published
April 30, 2018
Don Koonce, CoBuy-certified™ Pro in Seattle, helps friends and families co-buy homes through CoBuy’s platform.
Written by:
Team CoBuy
Team CoBuy
CoBuy simplifies co-ownership. Homeownership isn't designed for friends, relatives, and unmarried couples. So we're fixing it.
Matt Holmes
Matt Holmes
Planned a career in rock & roll, ended up studying economics and working in finance. Started CoBuy with my mom when we struggled to navigate all the moving parts.
Pam Hughes
Pam Hughes
Forty years of experience across finance, real estate, insurance, and construction. Committed to personal empowerment through financial education. Best friends with a small dog known as Francis.
Share

In 2019, Seattle's median home price hit $730,000.

For a single buyer earning the city's median income of $93,000, that's nearly 8 years of gross income. A 20% down payment? That's $146,000—or about 3+ years of pure savings if you somehow lived on air.

The math is brutal. Co-buying fixes it.

Friends, family, partners pool resources to access properties they couldn't touch alone. But co-buying isn't just "let's buy together and figure it out." It's complex. Most agents have no idea how to handle it.

Since 2016, CoBuy has been the only platform built specifically for small groups planning, buying, and managing home co-ownership together. Featured in The New York Times, Wall Street Journal, Forbes, and TIME, CoBuy created the co-buyer category and has helped hundreds of groups achieve homeownership.

Don Koonce, a broker with Windermere Real Estate Mount Baker in Seattle, joined CoBuy's-certified™ Professional network in 2018. CoBuy-certified™ means he specializes in co-buyer transactions and completed CoBuy's training on group-based homeownership.

Creating a new category generates attention. Pros in CoBuy's network get featured--Don's appeared in The Seattle Times, MarketWatch, NerdWallet, and HouseLogic.

Here's Don on what it's actually like working with CoBuyer groups:

Don Koonce on serving CoBuyer groups through CoBuy's platform

How Don Connected with CoBuy

Don Koonce: "I first learned about CoBuy from a married couple with a small child. They were in search of their first home, but they were discouraged because we had put in an offer on a home that they didn't get, and they couldn't afford what they really wanted to afford.

Then they realized they were living with her brother, and it was just a natural fit for them. They connected with CoBuy and connected me with CoBuy.

I thought, 'Why doesn't somebody think of this before?' Just a hole in the market that needed to be filled."

Why Seattle Is Perfect for Co-buying

Seattle consistently ranks among the nation's most expensive housing markets. Single-buyer approaches don't cut it anymore.

The Seattle market is great for it because our prices are so high and so many people are renting.

You can combine two, three incomes—whatever is needed to buy a piece of property—and find properties you wouldn’t be able to afford otherwise.

Why wouldn’t someone who’s currently renting want a way to enter the market and earn some equity? It’s huge!


— Don Koonce, CoBuy-certified™ Pro (RE Agent at Windermere)

Pooling resources unlocks properties. But only when the complexity actually gets managed properly.

What CoBuy Actually Does

Co-buying IS complicated.

When friends, family, or unmarried partners buy together, they face questions that don't exist in traditional transactions:

How should ownership be split?

What happens if someone wants out?

How do you qualify for a mortgage as a group?

What legal protections does everyone need?

How do you handle ongoing expenses?

What if circumstances change?

The greatest difference is that you have the full support of a whole team of professionals to help you through that process.


— Don Koonce, CoBuy-certified™ Pro

Here's how CoBuy handles it:

  • Education - Actual training on how co-buying works, not guesswork
  • Co-ownerOS™ - Platform for planning, structuring custom agreements, and managing co-ownership long-term
  • Professional network - CoBuy-certified™ agents, lenders, and attorneys who specialize in this exact scenario

Co-buying is hard. CoBuy makes it work.

Planning to Co-buy a Home?

Co-ownerOS™ gives your group the clarity and guardrails to plan, structure, and manage co-ownership.

Explore Co-ownerOS™ →

Don's Public Track Record: 12+ Documented Success Stories

Since 2018, Don has published 12+ "CoBuy Success Story" case studies on his Windermere blog.

Real CoBuyer groups, real outcomes, publicly documented.

Dan & Briannon — Fremont Townhome

Unmarried couple. First home together. Competitive market. Found a turnkey townhome that checked every box: low maintenance, perfect transit access, move-in ready.

Read full story →

Spouse & Siblings — West Seattle Townhome

Mixed group—spouse plus siblings pooling resources. None could afford the home alone. Together they got it done. Sleek West Seattle townhome, exactly what they needed.

Read full story →

Mom & Daughters — Multi-Generational Co-ownership

Family pooling resources across generations. Multiple incomes, shared homeownership goals, structured through CoBuy’s platform. Proof that co-buying works for more than just friends or couples.

Read full story →

Press Coverage: Creating a Category Gets Attention

CoBuy created the co-buyer category—and the industry took notice.

Don Koonce, a CoBuy-certified™ Pro, has been featured as part of that national coverage:

The Seattle Times
Local market coverage
MarketWatch
National co-buying feature
NerdWallet
Financial planning angle
Associated Press
Syndicated nationwide
NAR HouseLogic
Industry recognition

Why Co-buying Needs Specialized Support

Friends, relatives, unmarried partners buying together face challenges that don't exist for solo buyers or married couples:

  • Ownership structure. How do you split title? What percentages make sense?
  • Group financing. How do multiple people qualify for a mortgage together? What if incomes or credit scores vary?
  • Legal protection. What agreements cover expenses, equity, exit scenarios?
  • Relationship management. How do groups make decisions? What happens when circumstances change?
  • Long-term planning. How is co-ownership managed over years? Maintenance? Improvements? Eventual sale?

Most agents haven't seen infrastructure for this. CoBuy built it.

The Category CoBuy Created Is Growing

Housing costs keep climbing. More people are figuring out they can't do this alone.

Co-buying with friends, family, or partners isn't a workaround--it's a legitimate path to homeownership. CoBuy created this category in 2016. Nearly ten years in, the model works. The infrastructure exists. The professional network is real.

Agents like Don help CoBuyer groups navigate competitive markets through CoBuy's platform. The results are documented, public, and growing.

Ready to Achieve Homeownership Together?

Co-ownerOS™ handles planning, custom agreements, and ongoing management—everything you need to co-buy successfully.

Skip $10K+ in legal fees • Get instant access for $500/year

Get Your Annual Pass →

Real Estate or Mortgage Professional?

Join CoBuy’s certified professional network and position yourself as a co-buying specialist in your market.

Earn your CoBuy-certified™ credential

Learn About Certification →