Retaining Wall Cost in Honolulu 2026
Retaining Wall in Honolulu costs between $4,095 and $19,110 in 2026, with the average around $8,873. Honolulu pricing runs 37% above the US national average. Construction of a retaining wall with excavation, a gravel base, poured concrete or block, reinforcement, and drainage behind the wall. Includes backfill and grading.
What retaining wall includes in Honolulu
Construction of a retaining wall with excavation, a gravel base, poured concrete or block, reinforcement, and drainage behind the wall. Includes backfill and grading.
Typical time on site: 3 to 5 days. Local labor rate: $33/hour for an experienced concrete pro.
What changes the price of retaining wall in Honolulu
- Wall length and height
- Block versus poured concrete
- Drainage system
- Excavation and backfill
- Soil and slope conditions
A retaining wall quote priced off statewide averages will be off by 10 to 20 percent for Honolulu, because the metro has its own labor pool, material delivery distances, and permit timelines.
Honolulu climate and demand for concrete
A tropical climate with steady trade winds, salt-laden coastal air that accelerates corrosion, and heavy leeward-versus-windward rainfall differences that shape roofing and waterproofing work.
Honolulu permits for retaining wall
Building department: City and County of Honolulu Department of Planning and Permitting (DPP). https://www.honolulu.gov/dpp
Typical permit cost: $300 to $1,200 for residential trade permits given high island valuations. Inspection time: code review has averaged about nine days for residential plans, with commercial far longer. Honolulu rule: In Honolulu a building permit is required for electrical or plumbing work over $2,500 and general repairs over $10,000, and shoreline, flood-zone, or advisory-flagged properties are excluded from the instant online permit path. The Department of Planning and Permitting operates the permit center at 650 South King Street.
Hawaii sales tax and licensing for Concrete
Hawaii sales tax: 4% GET (Honolulu adds 0.5%). Hawaii GET applies to virtually all business activity including contractor labor. Prime: 4% on gross; sub: 0.5% on gross.
State license: Hawaii Department of Commerce and Consumer Affairs, required: $450 (initial) + exam.
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