The Hilo excavating contractor is booking projects for October through December. One crew handles site prep, septic installs and cesspool conversions across the island.
Hilo, HI (PRUnderground) October 7th, 2026
Big Island Excavation & Septic, a Hilo-based excavation and septic contractor, is now accepting new projects for October, November and December. Fall bookings are open to homeowners, builders, developers and businesses in Hilo and across the Big Island that need site work, septic work, or both on the same property.
Excavation and septic work tend to go hand in hand on the Big Island. Much of the island is not served by centralized sewer lines. That means nearly every new home, rural lot and commercial build needs an on-site wastewater system, and every septic system starts with excavation. A typical new build involves land clearing, foundation excavation, utility trenching and a septic installation. A cesspool conversion involves digging out for a new tank and drain field. Big Island Excavation & Septic handles both sides of that work under one contractor, so there is no scheduling gap between an excavation crew finishing and a septic crew starting.
On the septic side, the company provides septic system installation, septic repair, drain field installation, septic tank replacement, new construction septic installation and cesspool conversion to septic. Each system is installed with the correct slopes, backfill cushion and drainage materials. It is built to current state and County of Hawaii codes so it passes inspection without rework. Septic installations on the Big Island require a permit through the Hawaii State Department of Health’s Wastewater Branch, and the company works within that process from start to finish. Most residential installations take two to five days depending on lot conditions, system size and soil type.
On the excavation side, the company handles residential and commercial excavation, land clearing and site preparation, and lava rock lot ripping. It also does foundation excavation, trenching for water, sewer, electrical and drainage lines, grading and leveling, and driveway excavation. Its excavators, bulldozers and skid steers are fitted with hydraulic hammers, rippers and rock-rated buckets for the hard basalt and lava rock found across much of the island. On the wetter east side, in areas such as Keaau, Hawaiian Paradise Park and Pahoa, grading and drain field layouts are planned around heavy rainfall, local soil conditions and the water table.
“On this island you can’t separate the excavation from the septic work, and you can’t treat lava rock like mainland soil,” said Barry, owner of Big Island Excavation & Septic. “We’ve been working this ground since 2009, so we know how it behaves in Hilo, in Puna, up in Waimea and over in Kona. When one crew handles the digging and the system, the project moves faster and the owner has one number to call from the first site visit to final inspection.”
The company serves the entire Big Island from its Hilo headquarters. In East Hawaii, that includes Hilo, Keaau, Hawaiian Paradise Park, Pahoa, Orchidland, Leilani Estates, Mountain View, Papaikou, Pepeekeo and Volcano. In West Hawaii, it covers Kona, Captain Cook, Kawaihae and Ocean View, and in North Hawaii it serves Hawi, Kohala and Waimea.
Property owners planning fall projects can reach the excavation contractor in Hilo by phone or text at 808-731-1717, or request a callback through the company website. The team visits each property, reviews site conditions and provides a free estimate with a realistic timeline.
About Big Island Excavation & Septic
Big Island Excavation & Septic is an excavation and septic contractor based in Hilo, Hawaii, serving residential and commercial clients across the Big Island since 2009. The company specializes in septic system installation and repair, cesspool conversion to septic, drain field installation, septic tank replacement, land clearing, lava rock lot ripping, foundation excavation, trenching, grading, and driveway work. All of its septic work is completed to County of Hawaii codes.
