Which areas does Jeff serve?

Jeff Costello works across Kent, Bellevue, Seattle, King County, Snohomish County, Pierce County, Thurston County, Kitsap County in the Greater Seattle area. For homes outside that footprint, ask whether they cover your neighborhood or can refer a colleague.

How is Jeff listed on Manaky?

Manaky is a fee-transparency marketplace, not a brokerage. We compile licensed agents' public professional information so consumers can compare them in one place — for free. Manaky does not take a cut of any transaction and does not sell placement on rankings.

Kent · Bellevue · Seattle

Jeff Costello

Real estate agent serving Kent, Bellevue, Seattle

Tribeca NW Real Estate (co-founder, designated broker)

5 (800 reviews)

West Bellevue
Downtown Bellevue
Eastgate
Bridle Trails
Mortgage financing
Complex transaction structuring

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22
Years active: 800
Client reviews

About Jeff

Who you'd actually be working with.

Jeff Costello is the founder and managing broker (designated broker) of Tribeca NW Real Estate, which he established in 2017 and which has grown to over 35 team members. His real estate career began in 2004 in wholesale mortgage banking, and he became a licensed REALTOR® in 2007.

He earned an MBA while working full-time, which he cites as a proudest professional accomplishment. He brings hyper-local expertise across Bellevue submarkets including West Bellevue, Downtown Bellevue, Eastgate, and Bridle Trails, with a strong background in mortgage financing and complex transaction structuring.

Common questions

Questions people ask about Jeff.

Which areas does Jeff serve?: Jeff Costello works across Kent, Bellevue, Seattle, King County, Snohomish County, Pierce County, Thurston County, Kitsap County in the Greater Seattle area. For homes outside that footprint, ask whether they cover your neighborhood or can refer a colleague.
How is Jeff listed on Manaky?: Manaky is a fee-transparency marketplace, not a brokerage. We compile licensed agents' public professional information so consumers can compare them in one place — for free. Manaky does not take a cut of any transaction and does not sell placement on rankings.

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Manaky is not a real estate brokerage. Agents listed on the platform are independently licensed Washington brokers; each sets and publishes their own fees. Consumers pay nothing to Manaky.