A Belvedere bathroom remodel, handled by one team from concept to final walkthrough
Belvedere is one of the most particular places in Marin to remodel, and a bathroom is where that becomes obvious. The town sits on two small islands, Belvedere Island and Corinthian Island, with the level Belvedere Lagoon neighborhood along protected water just behind. The early homes here were drawn by architects like Albert Farr and Henry Gutterson, and the housing stock still leans Victorian, Shingle, and Bay Tradition, with later lagoon-side homes mixed in. A bathroom in an older Corinthian Island home does not work like a primary suite in a Lagoon waterfront house.
New Key Construction is a design-build firm, which means one team carries your project from the first sketch through the last tile. Interior design and construction sit under the same roof, so the person who chooses the stone and fixtures works alongside the person pricing the plumbing rough-in. You get priced options up front, photoreal 3D renderings before any permit is pulled, and white-glove project management that respects the fact that this is your home, not a job site.
Why Belvedere bathrooms need a design-build approach
The constraints here are real. Belvedere is a small, view-protective town, and most exterior changes trigger Planning Design Review even when no building permit is strictly required. A remodel that stays inside the existing footprint and changes nothing visible from the street or the water is usually a straightforward building permit through the City of Belvedere. The moment you want to add a window over a freestanding tub, bump out a wall, or change anything that reads from a neighbor's view corridor, you are likely into design review, where the town weighs views, mature trees, and the quiet residential character carefully.
This is exactly where design-build earns its keep. Because our designers and builders work together, we know early whether your wish list lives inside a simple permit or crosses into Planning review, and we tell you before you fall in love with a layout you cannot get approved. The older island homes bring their own surprises: original cast-iron waste lines, dated wiring, and walls that are rarely plumb. Lagoon homes add moisture, slab-on-grade realities, and tight side yards. We plan for these as part of the design, not as change orders discovered after demolition.
What the process looks like
We start with measured drawings of your bathroom and a conversation about how you live in it. From there we develop a design and present photoreal 3D renderings, so you can stand inside the new space and change your mind on screen rather than on site. Alongside the renderings you get priced options up front. You see what the walk-in shower costs versus a wet room, the marble versus a honed quartzite, and you decide with real numbers instead of vague allowances.
Once the design is locked, our team manages the City of Belvedere permitting, schedules the trades, and runs the build with one point of contact. Tile setters, plumbers, electricians, and finish carpenters are coordinated by the same firm that designed the room, which is how a small-footprint island bathroom stays on schedule. In a Shingle or Victorian island home we lean toward warm, classic finishes and millwork that belongs, and in a Lagoon home we often open the space to the light and the water view. Either way, we protect floors and pathways and treat your home the way it should be treated.
Frequently Asked Questions
Do I need design review for a bathroom remodel in Belvedere?
If your remodel stays inside the existing walls and changes nothing visible from the street, a neighbor, or the water, it usually moves through the City of Belvedere as a building permit alone. Adding or enlarging a window or altering the roofline can trigger Planning Design Review, since Belvedere reviews projects to protect views and neighborhood character. We assess this at the design stage and tell you which path your project falls into before you commit.
How long does a Belvedere bathroom remodel take?
A focused bathroom remodel typically runs several weeks of construction once permits are in hand, with design, pricing, and permitting handled before that. Older island homes can add time when we open walls and find original plumbing or wiring, which is why we plan for those conditions up front. Projects that require Planning Design Review take longer overall, and we build that review timeline into the schedule from the start.
How much does a high-end bathroom remodel cost here?
Cost depends on scope, from a refreshed guest bath to a full primary suite with a freestanding tub, walk-in shower, and custom vanity. Rather than quote a vague range, we give you priced options up front so you can compare materials and layouts against real numbers. Island homes with older infrastructure or any structural change sit at the higher end.
Can you work in older Victorian and Shingle-style homes on the islands?
Yes. Much of Belvedere's island housing stock is early-twentieth-century Victorian, Shingle, and Bay Tradition, and these homes need finishes that respect their period. Our team handles the hidden realities of older construction while specifying fixtures and millwork that belong to the house.
What makes design-build better for a project like this?
With one team handling design and build, the person choosing your stone and fixtures works beside the person pricing the rough-in, so cost is settled before you commit to a plan. You get photoreal 3D renderings before any permit is pulled and priced options up front, plus a single point of accountability through the entire Belvedere remodel.
Ready to design your Belvedere bathroom?
If you are planning a bathroom remodel on Belvedere Island, Corinthian Island, or along the Lagoon, New Key Construction will design it, render it, price it, and build it with one team. Reach out to start with a conversation and a clear, priced path.


