Fionnuala O’Sullivan

Fionnuala has sold four of our homes over the past 8 years. All have been well priced and have sold within the first three days of listing! Fionnuala is respectful of her client’s wishes, and never pushes her agenda. She is patient, very friendly and easy to work with. She is knowledgeable about staging, obtaining workers to fix up your house, and how to present your home in the best possible light. She is just the best! 

– Mary E.

Fionnuala's Current Listings

white door entrance

5122 S Mayflower St

Read More
Fionnuala O’Sullivan

Fionnuala O’Sullivan

Designated Broker – Owner


[email protected]

Born in Africa and raised in Ireland, I have been a Seattle resident since the early 1990s. I am an owner and the Designated Broker of GBK Realtors: an independent, full service company and one of Seattle’s most successful brokerages. I am a full-time professional Broker with two decades of experience. Today’s Real Estate market is fast moving and complex. I have the expertise and experience to help you navigate it.

My number one goal is to help my clients successfully navigate the process of buying or selling a home. By choosing to work with fewer clients, I can offer a personalized service and my undivided attention, which allows my client base to remain largely referral based.

I strongly believe that any good relationship is built on trust. Buying or selling a home can be an extremely personal and sensitive process, and is best achieved within a collaborative, understanding environment.

GBK has a significant percentage of the luxury market. We are a member of Who’s Who in Luxury Real Estate: a compendium of the finest residential real estate firms and brokers that collectively sells over $300 billion of real estate annually both nationally and internationally.

Community involvement is important to me. I have served on many boards and as a volunteer. I donate a portion of my commission to a local non-profit.

My clients (and their families) typically use my services for every real estate transaction that they consider, or actually engage in. I have been through many housing cycles and look forward to discussing your Real Estate needs with you.

Fionnuala's Featured Sales