Colleen Sono Yamaguchi, Business Attorney in Seattle, Washington
Over 40 years of legal practice · focused on Business, Contracts, and International
Seattle, WA
Practicing business in Seattle since 1986.
- 40+
- Years practicing
- 1
- Bar admission
Practices in
Are you Colleen Sono Yamaguchi?
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Quick answer
Colleen Sono Yamaguchi is an attorney based in Seattle, WA. The practice focuses on Business, Contracts, and International. Colleen has over 40 years of legal experience.
- Based in
- Seattle, WA
- Experience
- over 40 years
- Known for
- Business · Contracts · International
- Handles Business, Contracts, and International matters from Seattle, WA.
- Over 40 years of practice as a licensed attorney.
About Colleen Sono Yamaguchi: Colleen Sono Yamaguchi is an attorney based in Seattle, WA. The practice focuses on Business, Contracts, and International. Colleen has over 40 years of legal experience.
Areas of practice
Colleen's practice areas in Seattle
Colleen concentrates on business, contracts, and international. Each area below outlines the kind of case Colleen handles, typical outcomes to expect, and how the intake process starts.
Business
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Contracts
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International
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Business cases in Seattle, Washington
Colleen takes business matters in Seattle, Washington. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Colleen agrees to represent you.
Contracts cases in Seattle, Washington
Colleen takes contracts matters in Seattle, Washington. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Colleen agrees to represent you.
International cases in Seattle, Washington
Colleen takes international matters in Seattle, Washington. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Colleen agrees to represent you.
Biography
Colleen Sono Yamaguchi, business attorney serving Seattle
Colleen Sono Yamaguchi is an attorney based in Seattle, WA. The practice focuses on Business, Contracts, and International. Colleen has over 40 years of legal experience. Colleen works from Seattle, Washington and takes on business matters across the region.
Colleen Sono Yamaguchi is a lawyer practicing business/ commercial, contracts, international. Colleen received a B.B.A. degree from University of Hawaii in 1982, and has been licensed for 40 years. Colleen practices in Seattle, WA.
How Colleen handles business matters
Colleen Sono Yamaguchi is a lawyer practicing business/ commercial, contracts, international. Colleen received a B.B.A. degree from University of Hawaii in 1982, and has been licensed for 40 years. Colleen practices in Seattle, WA.
The kind of cases Colleen takes
Colleen reviews new inquiries case-by-case for business, contracts, and international matters in Seattle and the surrounding Washington area.
Credentials
Credentials — where Colleen studied and practices
Georgetown University
J.D. · 1986
University of Hawaii
B.B.A. · 1982
Jurisdictions
Colleen's state bar admissions
Washington
1986 · ACTIVE
Colleen studied at J.D. in Georgetown University and B.B.A. in University of Hawaii.
Law school and academic background
Colleen completed J.D. in Georgetown University and B.B.A. in University of Hawaii. Formal legal training is one signal of substantive knowledge — the day-to-day practice Colleen runs in Washington is where that training gets applied to real client questions.
Locations
Colleen Sono Yamaguchi's office in Seattle
Colleen's primary office is at 521 5th Ave W Unit 1103, Seattle, WA, 98119-4314. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Colleen Sono Yamaguchi
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Schedule your consultationHiring guide
How to hire Colleen Sono Yamaguchi — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Colleen usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Colleen charges for the initial consult. That fee is credited toward representation if you retain Colleen's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Colleen will tell you what matters and what doesn't.
Questions to ask a business attorney in Seattle, Washington
A short list to run through before you commit: How many business matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for Colleen
Colleen discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in business practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every business matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Colleen confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Colleen's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many business practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Colleen Sono Yamaguchi
How much does it cost to hire Colleen for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Colleen walks through the likely range during the consult so there are no surprises.
Does Colleen offer a free consultation?
Colleen charges for the initial consult; that fee is credited toward representation if you retain Colleen's office. Some business attorneys offer free consults — check Colleen's current terms during booking.
How long do business cases in Washington typically take?
Simple business matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Colleen gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Colleen take my case if I'm outside Seattle?
Colleen is licensed in Washington. Matters governed by Washington law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Colleen will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with Colleen?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Colleen will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Colleen accepting new business clients right now?
Colleen's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Business attorneys serving Seattle, Spokane and Tacoma in Washington
Colleen handles business matters throughout Washington. Each city below is a direct link into the search page for verified business attorneys in that community.
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