Delmar Seashore Property Management Cleaning Services Delmar Seashore Property Management Request Info PO Box 202 Selbyville, DE 19975 (443) 521-4149 About Map About A full service Residential & Commercial Cleaning Service serving Southeastern Sussex County. License and Insured.We offer Weekly, Bi-Weekly, Monthly and One-Time Services What's Nearby? Distance: 5 10 15 20 25 50 mi.