Windows and doors are the architectural punctuation of your estate — defining how light enters, how views are framed, and how the exterior aesthetic reads at every approach. We install custom aluminum-clad, fiberglass, and wood window systems and bespoke entry door packages that are engineered for Marin County's seismic and coastal conditions while elevating every elevation of your home.
Every window and door installation begins with a thorough structural assessment of the rough opening, header, and flashing conditions. We engineer correct water management, thermal breaks, and seismic anchorage for every opening before specifying the unit — because the most beautiful window system will fail within years if the underlying installation is not executed with precision.
ConstruBay (CSLB #1106798) is based in Mill Valley and has executed luxury window and door installation projects across Marin, Sonoma, and Napa Counties.
What Is Included
The Marin Advantage
Window and door replacement in many Marin County neighborhoods — particularly in Mill Valley, Ross, and Belvedere — requires Design Review Board approval for changes to window size, configuration, or material. Our PlanPass.ai platform pre-screens window permit applications for DRB compliance requirements before we commission custom units, preventing costly redesigns after fabrication. We are also deeply familiar with the seismic bracing requirements for large-format glazing on Marin's hillside properties, and we specify laminated safety glass as a standard practice for any opening in a seismically sensitive location.
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
$25,000 – $95,000+
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 Window & Door Project
Fixed-scope contract. No surprises. Schedule a private consultation with Paulo.