“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.”
—Bill Fuller, Partner, Mad Room Hospitality
Architect
Wm. H. Arthur IV, AIA, NCARB
More than twenty years specializing in the Construction Industry of Florida, Georgia, Colorado and New York, Arthur participated in the design of more than twelve-hundred projects.
After witnessing construction litigation fraud in South Florida’s Eleventh Judicial Circuit, Arthur subsequently dedicated a portion of his career to becoming a architectural expert to ensure integrity and accountability in construction litigation.
TEL: +01 (305) 770-6100
2920 Ponce de Leon Blvd
Coral Gables Florida, 33134-6811
EMAIL: william@whaiv.us
Hourly rate for consulting and project research $600.
Hourly rate for depositions, testimonies or courtroom appearances $1,200.
Depth of Architectural Expertise
With two decades of construction experience leading complex residential, commercial, and institutional projects, Arthur offers expert insight rooted in real-world design, construction, and code compliance. His work reflects a high standard of care and deep understanding of industry norms.
Experienced in Complex Litigation
Trial experience in Miami-Dade, Arthur excels at translating technical architectural issues into clear, and easy to understand courtroom-ready testimony. Attorneys have learned to trust Arthur’s ability to dissect plans, timelines and construction flaws in a way judges and juries understand.
Credibility Built on Legacy and Ethics
A third-generation architect to South Florida with prestigious academic foundation backed by The University of Florida and strong ethical credentials, William brings unparalleled credibility to every case. His evaluations are thorough, neutral and respected by legal and design professionals alike.
Recent Releases
09/01/2025 VOUS Church announces $32 Million Project designed by WHAA
07/25/2025 Local 10 News: Demolition Danger with expert Wm. H. Arthur IV, AIA, NCARB
09/26/2024 “Put this chapter behind us” City of Miami agrees to pay $12.5M to settle Ball & Chain lawsuit
06/30/2024 U.S. chapter of Docomomo International: Inside the Homes of Miami’s Regional Modernist Alfred Browning Parker tour and Construction walk-thru led by local architect Wm. H. Arthur IV
“The role of an expert witness is not to advocate for one side, but show the truth through experience and evidence. The construction industry usually gives us a clearly-defined trail of decisions, responsibilities and standards. My job is to illuminate that trail with clarity, neutrality, and the highest level of professional integrity.” —Wm. H. Arthur IV, AIA, NCARB, Principal, WHAA
“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.” —Greg Sausaman, CEO, CFE Master licensee, Starbucks®
“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.” —Alexandra Hayden, Principle Designer for Octave Studio, New York
“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.” —Peter Zuckerman, Condé Nast, New York
“Responsive, professional, experienced, & cool. This is a good place to start when building, designing, or developing your next project..” —Däniel Tabet, Index Development, Miami
“William is very good at his job. I would definitely use him again. He’s reasonable and moves fairly quick to accommodate the homeowner.” —Ed Calle, Miami
“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.” —Elsa Frieri, Miami