Holt Electrical Contractors, Inc. 12154 Darnestown RdGaithersburg, MD, 20878 View Phone 301-840-0797 Alt: 703-352-4560 Fax: 301-926-5940 Toll Free: 800-465-8476 12154 Darnestown RdGaithersburg, MD 20878 View Website Experience & Reliability About Send to My Email Send to My Phone Print this Page