Location: Vail, Colorado
Phone: 970-748-6400
Fax: 970-476-0446

John has been an attorney for over forty-five years but, far from slowing down, he is known for skiing, running marathons and climbing Colorado14er peaks. An Illinois native, he graduated from New York University School of Law, served as a law clerk for the United States Court of Appeals in the First Circuit for a year and then came west to the mountains he had grown to love during his college years. After “basic training” in a large Denver firm, he associated with another attorney in Leadville and lived and practiced in that mining community for 15 years. Since 1981, he has lived and practiced law in the Vail Valley, focusing on real estate and land use transactions and litigation. John also has a strong background in local government law, having served as County Attorney of Lake County from 1971 until 1993 and as Town Attorney of the Town of Avon from 1980 until 1998 and from 2001 until 2008. He has been President of the Colorado County Attorneys’ Association and has chaired the Municipal Attorneys’ Section of the Colorado Municipal League. And, he is very proud to have served as President of the Colorado Bar Association in 1993-94.

Martindale Hubbell AV rating, Bar Register of Preeminent Lawyers.

Areas of Practice

40% Real Estate Law
20% Business Law
20% Estate and Probate Law
20% Local Government

Litigation Percentage

40% of Practice Devoted to Litigation

Bar Admissions

Colorado, 1964
U.S. District Court District of Colorado, 1968
U.S. Court of Appeals 10th Circuit, 1968


New York University School of Law
LL.B. – 1964
Law Journal: Annual Survey of American Law, Editor in Chief, 1963 – 1964

Wabash College
A.B. – 1961
Honors: Phi Beta Kappa
Major: Latin

University of Edinburgh, Edinburgh, Scotland

Published Works

Real Estate Law Review Manual (Co-Author), West Publishing Company, 1997

Representative Cases

Jackson & Co. v. Town of Avon, 166 P. 3d 297 (Colo. Ct. App. 2007)
Brotman v. East Lake Creek Ranch, 31 P. 3d 866 (Colo. Sup. Ct. 2001)

Honors and Awards

Professionalism Award, Colorado Bar Association, 1992
Young Lawyer of the Year, Colorado Bar Association, 1972

Professional Associations and Memberships

Colorado Bar Association, President, 1993 – 1994
Denver and Continental Divide Bar Associations

Past Employment Positions

United States Court of Appeals, First Circuit, Law Clerk, 1964 – 1965
Dawson, Nagel, Sherman & Howard, Associate, 1965 – 1666
Cosgriff, Dunn & French, P.C., Principal, 1966 – 1985
Cosgriff, Dunn, Berry & Abplanalp, P.C., Principal, 1985 – 1992
Dunn, Abplanalp & Mauriello, P.C., Principal, 1992 – 2001
Dunn & Causey, LLC, Principal, 2002 – 2004
John W. Dunn & Associates, LLC, Principal, 2002 – 2008


Phi Gamma Delta