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. 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. Share this:Click to share on LinkedIn (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)