
MIAMI
William Hamilton Arthur Architect, Inc.
Design, Architecture and Planning for Miami, Florida

William Hamilton Arthur IV
is a distinguished architect based in Miami, Florida, with a deep commitment to culturally and historically sensitive design. As the founder of WHAA (William Hamilton Arthur Architecture) in 2015, he leads a full-service architectural firm with roots tracing back to Miami's architectural history since 1949.
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Arthur is an accomplished graduate of the University of Florida, where he graduated summa cum laude in 2011 and was honored with the School's AIA Henry Adams Gold Medal. His architectural philosophy is deeply influenced by the historical connections between Miami and Havana, emphasizing the cities' interconnected 500-year history.
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His firm, located in the historic Coral Gables district designed by George Merrick in 1924, specializes in creating environmentally sensible and energy-efficient buildings across various sectors, including residential, commercial, hospitality, and aviation. Drawing inspiration from prominent Miami Modern (MiMo) architect Igor B. Polevitzky, Arthur's approach integrates passive energy design, open-air environments, and atmospheric transparency.
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A key differentiator of WHAA is its comprehensive in-house capabilities. The firm handles design, procurement, and construction management, offering clients a streamlined process that reduces costs and delivery times. A report by Professional Bank of Coral Gables noted that WHAA's residential projects are constructed approximately 25% less expensively than the average firm in South Florida.
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Arthur's work reflects a nuanced understanding of Miami's architectural landscape, emphasizing cultural sensitivity, environmental responsibility, and design efficiency.

Trusted by Clients


Däniel Tabet
Responsive, professional, experienced, & cool. This is a good place to start when building, designing, or developing your next project.



Ed Calle
William is very good at his job. I would definitely use him again. He's reasonable and moves fairly quick to accommodate the homeowner.



Elsa Frieri
Very professional company. It is very hard to find architects that not only know what they are doing, but also meet deadlines. Everyone is very nice and always willing to help! Don't hesitate to hire them, you won't regret it.


TESTIMONY
"As a Master Licensee for Starbucks Coffee, I've collaborated with numerous architects throughout my career, but William Hamilton Arthur stands out as a truly exceptional professional. From our very first meeting, it was clear that William is not just an architect, but an artist who approaches design with both creativity and precision. When we began the project for our new Starbucks location in Miami, William transformed what could have been a standard commercial space into a visually stunning environment that perfectly captures the essence of our brand.
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What truly sets William apart is his remarkable ability to balance artistic vision with professional execution. He listened intently to our specific requirements, presented meticulously detailed plans, and maintained transparent communication throughout the entire design and construction process. His creative approach meant that our Miami Starbucks isn't just another coffee shop – it's a beautifully crafted space that enhances the customer experience. William's professionalism gave me complete confidence in the project, while his artistic sensibilities ensured that the final result would be both functional and inspiring. Working with William was like collaborating with a master craftsman who understands that great architecture is about creating an experience, not just designing a building.
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I continue to work with William on our 8th Starbucks in Longboat Key, and I can confidently say that his technical and creative skills have been truly remarkable. In fact, I plan to have William as our architect on all Starbucks projects moving forward.​"
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Greg Sausaman, CEO, CFE Ice Cream 4 You International, LLC, Topper's Craft Creamery®, Master licensee, Starbucks® and author of Inside the Box: The Power of Complementary Branding.
TESTIMONY
"When I hired William Hamilton Arthur to design and oversee my home, I wanted something special within a realistic budget and smooth project management. William exceeded expectations with his remarkable architectural vision, blending artistic sensibility and practicality.
His collaborative approach and exceptional communication skills align all stakeholders, turning a complex process into an inspiring journey. Even amid challenges, William’s calm professionalism and creative problem-solving make him a true partner in realizing an architectural vision."
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Peter Zuckerman, Condé Nast


TESTIMONY
As a designer with 30 years of high-end residential design and build experience in NY and all points beyond, we seek out local design and expediting partners for our projects. When we embarked upon our first design project in Miami, we were lucky enough to be directed to William Arthur, who has been a seamless and sagacious partner in assisting with the perils and confusion that is intrinsic to the CMB Building Department navigation.
A third-generation Miami architect, William has finesse and steadfastness that is both steadying and professional. He and his team are beyond kind and effective at team building and management. I feel lucky to have had this opportunity to work with William, and would without hesitation recommend him to spearhead any project.
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Alexandra Hayden, Principle Designer for Octave Studio, New York
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TESTIMONY
William Hamilton Arthur is not just an architect - he's a visionary who brings an extraordinary depth of knowledge that extends far beyond traditional design boundaries.
I can confidently say that William is extremely knowledgeable with local municipal codes, and approaches each project with realistic timelines and deliverables. He has been instrumental in our efforts to revitalize and enhance the Calle Ocho community. Where many see challenges, William sees opportunities for transformative design that respects both the letter of the law and the spirit of urban renewal.
What impresses me most is William's ability to translate complex regulatory frameworks into elegant, practical design solutions. He doesn't just work around regulations—he understands them so deeply that he can create architecturally innovative spaces that are simultaneously compliant and inspiring. His approach demonstrates a rare combination of technical precision, legal acumen, and creative vision.
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Bill Fuller, Partner, Mad Room Hospitality