New Construction Plumbing on O'ahu — Full Plumbing Home Installs

Before finalizing the design if possible. Early plumber involvement prevents expensive changes — things like floor plan layouts that make plumbing runs unnecessarily complex or costly, or fixture placements that conflict with structural elements. We can review plans and advise before groundbreaking.

Yes. Hawaii Revised Statutes require solar water heaters on most new single-family residential construction. There are exceptions for structural or shading constraints that must be documented. As part of our new construction scope, we include the solar water heater rough-in and installation. See our water heater services for more detail.

It depends on the property. If your existing home is on city sewer, the ADU can typically connect to the existing line if the capacity is sufficient. If you're on a septic system, adding an ADU increases wastewater load and may require upgrading or expanding the system. We assess this during the planning phase.

Underground rough-in for a typical single-family home takes 2–3 days. Above-ground rough-in takes 3–5 days depending on the complexity of the layout. Finish plumbing (fixture installation) takes 1–2 days. We coordinate with your project manager to align with the overall construction schedule.

Yes — we work with GCs regularly and are used to coordinating with other trades. We communicate clearly about rough-in requirements, inspection hold points, and scheduling needs so your project doesn't experience plumbing delays.