Services

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.

1 Septic Tank Pumping for Oahu Hawaii 557
2 Leach Fields for Oahu Hawaii 428
3 Cesspool Upgrades for Oahu Hawaii 924
4 Pump Stations for Oahu Hawaii 325
5 Septic Systems for Oahu Hawaii 444
6 Fiberglass Tanks for Oahu Hawaii 381
7 Grease Trap Pumping for Oahu Hawaii 343
8 General Contracting for Oahu Hawaii 462
9 Civil Engineers for Oahu Hawaii 384

Testimonials

"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

We service the entire island of Oahu Hawaii

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!