According to our records, this business is located at 15601 Clifton Park Ave. in Markham (in Cook County), Illinois 60428, the location GPS coordinates are: 41.605624 (latitude), -87.705449 (longitude). A-1 County Plumbing is categorized under Warm Air Heating and Air Conditioning Contractors (SIC code 1711). Known organization owner is Steve Smith. Current estimates show that the unit has a sales volume of $1,168,000 and staff of approximately 8 people. You can contact the company by phone at (708) 385-2000.