THE DIRTBID REGIONAL MODEL · HAWAII
Sitework in Hawaii on the same Richmond Metro = 1.00 scale as the rest of DirtBid: 3 cost regions and 5 counties, each with a soil-risk rating from USDA and USGS data. Urban Honolulu Metro runs highest at 1.14×; Rest of Hawaii lowest at 1.12×.
Hawaii multipliers and county ratings are planning-level: built from federal price and soil data, and not yet checked against local bids or a local estimator. Remote logistics and barging are not in these numbers; add them separately.
Dominant ground: Rough mountainous land, Helemano, Wahiawa
1 county in this region. Highest risk score: Honolulu County (4 of 10). Remote logistics and barging are not in this multiplier; add them separately.
Counties: Honolulu County
Dominant ground: Kaiwiki, Keei, Honokaa
2 counties in this region. 2 of 2 rate high for shallow rock. Highest risk score: Hawaii County (4 of 10). Remote logistics and barging are not in this multiplier; add them separately.
Counties: Hawaii County, Kauai County
Dominant ground: Kalaupapa, Rough mountainous land, Very stony land
2 counties in this region. 2 of 2 rate high for shallow rock. Highest risk score: Kalawao County (4 of 10). Remote logistics and barging are not in this multiplier; add them separately.
Counties: Kalawao County, Maui County
FAQ
From USDA soil survey data, the most common across the state: shallow rock (4 of 5 counties rate high). A parcel can differ from its county, so read the survey for your exact site.
From the Commerce Department's Regional Price Parities, on the same Richmond Metro = 1.00 scale as Virginia. Across 29 reviewed regions that method missed by about 0.03 on average. They have not been checked against executed bids in Hawaii, so use them for planning, not a final bid.
They are screening ratings from federal soil and geology data, not a local estimator's review and not a geotechnical report. Tested against 511 reviewed counties, they land within one level most of the time, and exact matches are less common. Get borings before you price a real site.
Soil Report
A $350 DirtBid AI Soil Report reads the official USDA survey for your exact parcel, flags the hazards above, and prices the risk — before you buy land or sign a contract.