Plumbing in a luxury estate is not background infrastructure — it is the tactile experience of a $10,000 shower system functioning exactly as designed every single morning. We install high-end fixture packages from Waterworks, Dornbracht, Rohl, and Grohe, and we engineer the supply and drainage systems that allow those fixtures to perform at their specified pressure, temperature, and flow rate for decades.
Whole-home replumbing removes the single largest long-term maintenance risk from any estate — aging galvanized or copper supply lines. We use PEX-A (Uponor) or copper supply systems depending on application, and we re-engineer drain, waste, and vent systems to eliminate the recurring blockage and drain performance issues common in homes with original cast iron or ABS drain lines.
ConstruBay (CSLB #1106798) is based in Mill Valley and has executed luxury plumbing projects across Marin, Sonoma, and Napa Counties.
What Is Included
The Marin Advantage
Plumbing permits in Marin County and incorporated cities within the county require licensed plumber certification and inspection at rough-in, pressure test, and final stages. Our in-house plumbers are C-36 licensed in California and current on the California Plumbing Code, including the specific fixture unit and supply sizing requirements for large luxury homes with multiple master bathrooms and outdoor kitchen applications. For steam shower systems — which require coordinated plumbing, electrical, and mechanical permits — our PlanPass.ai platform manages the multi-agency submission process. We have completed full replumbing projects on historic estates in Mill Valley and Tiburon where original cast iron and galvanized supply lines required careful demolition management.
Our Process
Curation & Design
We begin with an in-depth discovery session at your property, translating your vision into a fixed-scope brief with transparent pricing.
Artful Execution
Our licensed craftsmen execute with precision under direct site supervision — every material sourced, every detail approved by you before installation.
The Final Reveal
A thorough walkthrough with your project lead ensures every element meets our standard before you take possession of your transformed space.
Investment Range
$10,000 – $75,000+
Typical Project Range
All projects are delivered under a fixed-scope contract — the number you approve is the number you pay.
Frequently Asked Questions
Begin Your Project
Begin Your Plumbing Project
Fixed-scope contract. No surprises. Schedule a private consultation with Paulo.