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William A. McLain

Professional Bio

Mr. McLain limits his practice to property taxation matters before county assessors, county boards of equalization, boards of county commissioners, the Colorado Board of Assessment Appeals, the Colorado Division of Property Taxation, Colorado District Courts, the Colorado Court of Appeals and the Colorado Supreme Court. He also represents clients on property tax issues before the Colorado General Assembly. He is rated AV Preeminent by Martindale-Hubbell. AV Preeminent is a significant rating accomplishment and a testament to the fact that Mr. McLain’s peers rank him at the highest level of professional excellence.

Professional experience:

Higgins, Hopkins, McLain & Roswell, L.L.C. – Special Counsel
Denver, Colorado
William A. McLain, P.C. – President
Denver, Colorado
Welborn, Dufford, Brown & Tooley – Partner
Denver, Colorado
Sidley & Austin – Associate
Chicago, Illinois
U.S. District Judge Alexander J. Napoli – Law Clerk
Chicago, Illinois

Bar admissions:

  • Illinois Supreme Court, 1971
  • Colorado Supreme Court, 1975

Professional activities: (some positions not currently held)

  • Member, Colorado Bar Association
  • Member, Denver Bar Association


  • Juris Doctor, Loyola University of Chicago, 1971
  • Bachelor of Science, Business Management, Southern Illinois University, 1966

Reported cases:

  • Jefferson County Bd. of County Com’rs. v. S.T. Spano Greenhouses, Inc., 155 P.3d 422 (Colorado Court of Appeals 2006).
  • Welby Gardens v. Adams County Bd. of Equalization, 71 P.3d 992 (Colorado Supreme Court 2003).
  • Boulder Country Club v. Boulder County Bd. of Com’rs., 97 P.3d 119 (Colorado Court of Appeals 2003).
  • Welby Gardens Co. v. Adams County Bd. of Equalization, 56 P.3d 1121 (Colorado Court of Appeals 2002).
  • Firstbank of Longmont v. Board of Equalization, Boulder County, 990 P.2d 1109 (Colorado Court of Appeals 1999).
  • Del Mesa Farms v. Board. of Equalization of Montrose County, 956 P.2d 661 (Colorado Court of Appeals 1998).
  • Leprino v. Huddleston, 902 P.2d 962 (Colorado Court of Appeals 1995).
  • Golden Aluminum Co. v. Weld County Bd. of County Comm’rs., 867 P.2d 190 (Colorado Court of Appeals 1993).
  • Portofino Corp. v. Board of Assessment Appeals, 820 P.2d 1157 (Colorado Court of Appeals 1991).
  • LaDuke v. CF & I Steel Corp., 785 P.2d 605 (Colorado Supreme Court 1990).
  • CF & I Steel Corp. v. Patton, 765 P.2d 586 (Colorado Court of Appeals 1988).


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