Ada Ko, Business Attorney in Mercer Island, Washington
Over 43 years of legal practice · focused on Business, Contracts, and General · 5.0/5 rating from 1 verified client review
Mercer Island, WA
Practicing business in Mercer Island since 1983.
- 43+
- Years practicing
- 5.0 ★
- 1 client review
- 1
- Bar admission
Practices in
Are you Ada Ko?
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Quick answer
Ada Ko is an attorney based in Mercer Island, WA. The practice focuses on Business, Contracts, and General. Ada has over 43 years of legal experience. Rated 5.0 out of 5 from 1 client review.
- Based in
- Mercer Island, WA
- Experience
- over 43 years
- Known for
- Business · Contracts · General
- Handles Business, Contracts, and General matters from Mercer Island, WA.
- Over 43 years of practice as a licensed attorney.
- Recognized with BV Distinguished.
About Ada Ko: Ada Ko is an attorney based in Mercer Island, WA. The practice focuses on Business, Contracts, and General. Ada has over 43 years of legal experience. Rated 5.0 out of 5 from 1 client review.
Areas of practice
Legal matters Ada takes on
Ada concentrates on business, contracts, general, international, and tax. Each area below outlines the kind of case Ada handles, typical outcomes to expect, and how the intake process starts.
Business
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Contracts
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General
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International
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Tax
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Business cases in Mercer Island, Washington
Ada takes business matters in Mercer Island, 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 Ada agrees to represent you.
Contracts cases in Mercer Island, Washington
Ada takes contracts matters in Mercer Island, 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 Ada agrees to represent you.
General cases in Mercer Island, Washington
Ada takes general matters in Mercer Island, 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 Ada agrees to represent you.
International cases in Mercer Island, Washington
Ada takes international matters in Mercer Island, 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 Ada agrees to represent you.
Tax cases in Mercer Island, Washington
Ada takes tax matters in Mercer Island, 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 Ada agrees to represent you.
Biography
Meet Ada Ko — business lawyer in Mercer Island
Ada Ko is an attorney based in Mercer Island, WA. The practice focuses on Business, Contracts, and General. Ada has over 43 years of legal experience. Rated 5.0 out of 5 from 1 client review.
Ada Ko is a lawyer practicing business/ commercial, corporate, general and 4 other areas of law. Ada received a B.A. degree from University of Washington in 1975, and has been licensed for 43 years. Ada practices in Mercer Island, WA.
How Ada handles business matters
Ada Ko is a lawyer practicing business/ commercial, corporate, general and 4 other areas of law. Ada received a B.A. degree from University of Washington in 1975, and has been licensed for 43 years. Ada practices in Mercer Island, WA.
The kind of cases Ada takes
Ada reviews new inquiries case-by-case for business, contracts, and general matters in Mercer Island and the surrounding Washington area.
Credentials
Education, bar admissions, and languages
Seattle University
J.D. University · 1983
University of Washington
B.A. · 1975
Jurisdictions
Ada's state bar admissions
Washington
1983 · ACTIVE
Ada studied at J.D. University in Seattle University and B.A. in University of Washington.
Law school and academic background
Ada completed J.D. University in Seattle University and B.A. in University of Washington. Formal legal training is one signal of substantive knowledge — the day-to-day practice Ada runs in Washington is where that training gets applied to real client questions.
Recognition
Recognition and thought leadership
Ada has received 1 formal recognition from bar associations, industry bodies, and peer-review services.
BV Distinguished
Legal awards and honors
BV Distinguished.
Affiliations
Ada's professional memberships and bar associations
Washington State Bar Association
Immediate Past-President, Tax Section) International Bar Association (Tax Committee) Inter-Pacific Bar Association (Executive Council Member and Immediate Past-Chair, Tax Law Committee) International Fiscal Association (Member, United States and Canadian · membership
Locations
Ada Ko's office in Mercer Island
Ada's primary office is at 7525 SE 24TH ST. SUITE 600, Mercer Island, WA, 98040. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Ada Ko — 5.0/5 rating from 1 verified client review
Every review below is from a verified client of Ada. Reviews cover communication, case outcome, and value — the three signals that matter most when comparing business attorneys in Mercer Island.
5.0
1 client review
Client ratings are sourced from public records and editorial research. Reviews on LawyersListed are accepted from verified clients once Ada Ko claims this profile.
Read all reviewsHiring guide
How to hire Ada Ko — what to expect in your first consultation
Working with a new business attorney should feel structured. Here's how the first two conversations with Ada usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Ada charges for the initial consult. That fee is credited toward representation if you retain Ada'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; Ada will tell you what matters and what doesn't.
Questions to ask a business attorney in Mercer Island, 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 Ada
Ada 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. Ada confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Ada'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 Ada Ko
How much does it cost to hire Ada for a business case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Ada walks through the likely range during the consult so there are no surprises.
Does Ada offer a free consultation?
Ada charges for the initial consult; that fee is credited toward representation if you retain Ada's office. Some business attorneys offer free consults — check Ada'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. Ada gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Ada take my case if I'm outside Mercer Island?
Ada 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 — Ada 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 Ada?
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. Ada will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Ada accepting new business clients right now?
Ada'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 Mercer Island, Seattle and Spokane in Washington
Ada handles business matters throughout Washington. Each city below is a direct link into the search page for verified business attorneys in that community.
More counsel
Other top-rated business attorneys in Washington
If Ada's intake is full or the fit isn't right, these business attorneys in Mercer Island handle similar matters. Every profile below is verified and open to consultations.





