William Martinez, MRICS, ASA
California Certified General Appraiser
Expert witness and litigation support throughout California. No lending assignments. No institutional conflicts.
About the Practice
Martinez & Associates is a non-lending real estate appraisal practice founded in 2005. Every engagement is for litigation support, tax valuation, eminent domain, or advisory purposes — not mortgage lending.
William Martinez holds the MRICS and ASA designations, is a Candidate for Designation (MAI), Appraisal Institute, and is a California Certified General Appraiser, and is completing an MSc in Real Estate Finance and Investment at the University of Manchester (QS #35 globally, RICS-accredited programme, expected 2027). He completed the RICS Global Red Book 2025 training and certification in April 2026. From 2024–2025 he served as an Appraisal Reviewer for the U.S. Department of the Interior under the Yellow Book standard.
William Martinez is the principal and founder of Martinez & Associates, a real estate appraisal and consulting firm established in 2005. His practice is dedicated exclusively to litigation, tax, and advisory valuation work — he does not perform mortgage lending appraisals. That deliberate focus keeps his independence clean, his calendar available for complex matters, and his credibility intact under cross-examination.
His work spans commercial and residential property types across multiple asset classes, including office, industrial, retail, multifamily, hospitality, land, and special-use properties. He has been retained as an expert witness by plaintiff and defense counsel, with expert testimony admitted in California Superior Court. He has also appeared in U.S. District Court proceedings.
Mr. Martinez is pursuing an MSc in Real Estate Finance and Investment at the University of Manchester — ranked #35 globally by QS and one of the world's leading RICS-accredited real estate programmes (expected 2027) — and is a Member of the Royal Institution of Chartered Surveyors (MRICS). This credential, rare among U.S. appraisers, provides the foundation for the firm's planned international expansion into the United Kingdom.
He is a designated member of the American Society of Appraisers (ASA) and a Candidate for Designation, Appraisal Institute — actively working toward the MAI, the premier commercial appraisal designation. He complies with the Uniform Standards of Professional Appraisal Practice (USPAP). He holds state certifications across California, with additional state expansions underway.
Discuss an Engagement →One of a few U.S. appraisers recognized by RICS — the global standard-setter for real estate valuation. Enables cross-border engagements and UK Valuation Tribunal work.
Designated member of ASA, one of the most rigorous appraisal designations in the United States, covering real property valuation with an emphasis on complex and litigation-related assignments.
Actively working toward the MAI designation — the Appraisal Institute's premier credential for commercial appraisers and the benchmark standard for complex real estate valuation in U.S. courts and before the IRS.
Candidate for the MSc in Real Estate Finance & Investment at the University of Manchester (QS #35 globally, RICS-accredited), expected 2027. The programme provides the analytical and theoretical foundation underlying all valuation work.
Full compliance with USPAP, the ethical and professional standards governing all appraisal practice in the United States. All reports are prepared to USPAP standards regardless of assignment type.
Currently licensed in California. Expanding to additional states. Each jurisdiction's certification requirements are met or exceeded.
Qualified to testify as an expert witness in California Superior Court. Has also appeared in U.S. District Court proceedings.
Topic Speaker on "Flipped Classroom" models at the National Appraisal Institute Education Committee Meeting, San Francisco, CA, November 2015.
Active contributor to appraisal education and methodology, with a focus on advancing the application of technology and analytical rigor in complex valuation assignments.
Whether you need an expert witness, a tax valuation, or representation in an assessment appeal, we're ready to discuss your matter.
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