Best Interior Designers in Mercer Island, WA (2026)
Choosing the right interior designer in Mercer Island, WA can be overwhelming. With 5 interior designers operating across the Mercer Island metro area, how do you separate the truly exceptional from the merely adequate? At The Interior Design Guide, we analyze publicly available data to rank every interior designer on a transparent, editorial basis -- no paid placements, no sponsored rankings.
This 2026 ranking evaluates interior designers in Mercer Island, Washington using our Guide Score percentage, which normalizes captured evidence from reviews, credentials, press recognition, web presence, experience, and profile completeness. We reviewed 5 active businesses in the Mercer Island market and selected the top 5 for this list.
By the numbers: Guide Score percentages on this list range from 57% to 91%, the average firm has 22 years of experience. Updated June 2026.
Each entry below includes the business's Guide Score, star rating, review count, and a data-driven explanation of why they earned their spot. Click through to any profile for the full breakdown including contact information, specialties, credentials, and related businesses in Mercer Island.
The Top 5 Interior Designers in Mercer Island, WA
-
Selected for team of 5 professionals.
Michelle Yorke Interior Design LLC has built a reputation for quality interior design work in the Mercer Island, WA area. They serve clients in the luxury market segment. Reach them at (206) 349-1239…
View full profile → -
#2 Six Walls 78%
Selected for 22 years of experience (est. 2004).
Six Walls is an trusted interior designer proudly serving Mercer Island, WA and the surrounding region. Led by Seattle Denver, six Walls was founded in 2004 on the principle of approachability and ha…
View full profile → -
#3 ID by Gwen 74%
Ranked 3rd among interior designers in this market based on overall Guide Score.
ID by Gwen is an trusted interior designer proudly serving Mercer Island, WA and the surrounding region. Located at 7500 86th Ave SE. Reach them at (206) 313-0720. Visit their website for more detail…
View full profile → -
Ranked 4th among interior designers in this market based on overall Guide Score.
Colleen Knowles Interior Design brings professional interior design expertise to the Mercer Island, WA community. Located at 9311 SE 36th Street, Suite 103. Reach them at (206) 399-2232. The Mercer I…
View full profile → -
#5 Diamond Design 57%
Ranked 5th among interior designers in this market based on overall Guide Score.
Diamond Design is an trusted interior designer proudly serving Mercer Island, WA and the surrounding region. Located at 9031 E Shorewood Dr 21-619. Reach them at (206) 660-9589. The Mercer Island int…
View full profile →
How We Ranked These Interior Designers
Our Guide Score percentage combines verified ratings, review volume, web presence, profile completeness, professional credentials, press recognition, and experience. Scores are normalized across categories where positive evidence was captured, so a missing category is shown as not captured rather than counted as a failing grade. No business can pay for a higher ranking.
Data sources include Google Business Profile, professional registries, portfolio sites, press databases, and direct business submissions. Every piece of data is publicly verifiable.
Frequently Asked Questions
How did we rank the best interior designers in Mercer Island?
The Interior Design Guide ranks interior designers using our Guide Score percentage, a composite metric computed from publicly available data. The score uses weighted evidence from ratings, review volume, web presence, profile completeness, credentials, press recognition, and experience, then normalizes across categories where positive evidence was captured. Categories with no captured signal are not counted as failing grades. There is no paid placement -- every ranking is purely editorial.
Who is the #1 interior designer in Mercer Island, WA?
As of 2026, Michelle Yorke Interior Design LLC holds the #1 ranking in Mercer Island with a Guide Score of 91%. Rankings are recalculated with every data update and reflect the latest available information.
How often is this list updated?
Core data (ratings, reviews, contact information) is re-verified on a rolling monthly cadence. Credentials and awards are audited quarterly. Guide Scores recalculate automatically with every data update, so rankings may shift as new reviews are posted or credentials are verified.
How many interior designers are there in Mercer Island?
Our database currently tracks 5 active interior designers in the Mercer Island, WA metro area. This list highlights the top 5 based on Guide Score. Browse our full Mercer Island directory to see every listed business.
Can a interior designer pay to be ranked higher?
No. The Interior Design Guide does not accept payment for rankings. Guide Scores are computed algorithmically from verified public data. Businesses can claim and update their profile with accurate information, but the ranking algorithm treats all profiles equally. Our editorial independence is core to our methodology.
What should I look for when hiring a interior designer in Mercer Island?
We recommend evaluating: (1) professional certifications and credentials, (2) verified customer reviews and ratings, (3) years of experience in the Mercer Island market, (4) portfolio quality and range of work, (5) budget alignment with your project scope, and (6) responsiveness and communication style. Our Guide Score weighs these factors so you can compare at a glance.