Serving the Hawaiian Island of Oahu

Cowper Construction, is a full service site work contractor for the Island of Oahu. We can take care of your project from grubbing and clearing to finish grading. Services include Demo, Oahu Lot Clearing, Rock Breaking, Cowper Construction, Septic Systems and more! We have the right team on staff to get the job done and you will be happy to say you picked Cowper Construction for your Hawaii construction project. Our equipment operators are very experienced in Hawaii conditions.


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!


"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