Our services include, but are not limited to: Demos, Trenching, Rock Breaking, Septic Systems, Treatment Plants, Underground Utilities, All Site Prep for Building, Lot Clearing and Grubbing, Leach Fields and Pump Stations.
"Cowper Construction finished my project on time and added some great ideas to improve the excavation design. Pro job and great skill with the equipment. I should have been using Cowper on my other jobs." ~ Kevin M
"Great company and I am happy with their work. Welcome back on my jobs any time!" ~ Kurt Davis
"My cesspool upgrade in Hawaii went down without any hangups. Thank you Mike and Bob!" ~ Aloha Jerry Driscoll
General contractors, civil engineers, septic systems, septic tanks, cesspool upgrades, leach fields, pump stations, grease traps, grease and sewer pumping
Aiea - Barbers Point NAS - Ewa Beach - Fort Shafter - Haleiwa - Hauula - Hawaii Kai - Honolulu - Kaaawa - Kahalu'u - Kahuku - Kailua - Kaneohe - Kapolei
Kunia - Laie - Mililani - Pearl City - Wahiawa - Waialua - Waianae - Waikiki - Waimanalo - Waipahu
and all surrounding areas!