William D. Mahan's Profile Image

William D. Mahan

Phone: (408) 288-8100
Fax: (408) 288-9409

For nearly forty years, Bill Mahan has provided his clients with invaluable and exemplary legal services in the areas of corporate and business law, estate planning, probate and taxation, and trust administration. In addition to his J.D. degree, Bill has a Master’s in Taxation and advises clients on complex tax matters.

From the creation of wills and trusts, the administration of estates, the formation and dissolution of business entities, representing buyers and sellers in business sales transactions, or exit planning strategies involved in passing businesses on to family members, employees, or outside buyers, Bill believes in establishing a completely personal level of communication and service from day one.

In recent years, due to the financial crisis, Bill’s skills and expertise in tax law and real estate law have been in even higher demand to meet the needs of the many people facing mortgage-related financial challenges. He has been a sought-after expert in the area of foreclosures, short sales, and loan modifications and has appeared as a guest on Financial Weekly Insider, a program hosted by Michael Gray, CPA, to provide detailed information to viewers about the timing, procedures and tax implications of these distressed property matters, as well as strategies that can be used to minimize their impact.

Bill has earned and is proud of his AV rating, the highest rating from a nationally recognized attorney peer review source, signifying his integrity, professional excellence and years of practicing law at the highest skill level.

Bar Admission

  • California


  • Golden Gate University, San Francisco, L.L.M., graduating Salutatorian (1984)
  • Santa Clara University School of Law, J.D. (1980)
  • University of California, Berkeley, B.A. (1972)

Professional Activities and Awards

  • Rated “AV” Martindale Hubbell
  • San Jose Flycasters

Representative Matters


  • Represented many estate executors and trustees in probate and trust administration matters in various bay area county superior courts, including prosecuting Heggstad petitions, Probate Code section 17200 petitions, accountings, and more.