Real Estate Dispute Resolution in Orange County, CA? Call Mark D. Holmes, Attorney By Mark D. Holmes on September 21, 2016 in Business Law News, M.D. Holmes Law News, Real Estate Attorney Real Estate Dispute Resolution in Orange County, CA? Call Mark D. Holmes, Attorney at (949) 645-0450. Residential real estate disputes usually require mediation. If that doesn’t happen and you need a real estate attorney call Mark. Continue Reading