By Sean Warnet — USMC veteran & Hawaiʻi C-5 License CT-37515 · Published February 2026 · Updated September 4, 2026
A permit creates an official review and inspection path for work that requires one. On Oʻahu, building permits are administered by the City & County of Honolulu's Department of Planning and Permitting (DPP), while the required licensed professional depends on the type of work.
What needs a permit
- Wall changes — a load-bearing or otherwise structural change may require engineered documents, a building permit, and a contractor with the appropriate classification.
- Plumbing changes — relocating a sink, adding fixtures, or re-routing drains may require a plumbing permit and licensed plumbing contractor.
- Electrical changes — new circuits, panel work, or significant rewiring may require an electrical permit and licensed electrical contractor.
- Additions and roofline changes — expanding a footprint or changing structural components requires project-specific review.
What usually doesn't
Some like-for-like cosmetic work may not require a building permit, but the answer depends on the actual scope. Confirm permit requirements with DPP and make sure the written contract identifies the license responsible for each regulated trade.
Why an unpermitted remodel costs you later
Island Contractors holds Hawaiʻi C-5 license CT-37515 for cabinet, millwork, and carpentry remodeling and repairs. Before work begins, we identify likely permit needs and document who is responsible. Any plumbing, electrical, structural, or other scope outside C-5 must be performed and permitted by the appropriately licensed professional.
