Service areas · Sonoma and Napa
Sauna builder in Sonoma and Napa wine country
YOURSAUNAS designs, builds, wires and services saunas across Sonoma and Napa counties, from Sonoma and Napa up to Healdsburg, driving up from our base in Mill Valley.
- Sonoma
- Healdsburg
- Napa
- Petaluma
- Santa Rosa
Who builds custom saunas in Sonoma and Napa?
YOURSAUNAS does, and we already have work on the ground here: a custom sauna built in Sonoma, a custom indoor sauna underway in Healdsburg, and a service call in Napa. We are a licensed California general contractor (CSLB license #1150020, Class B) based in Mill Valley, a drive up the 101 from wine country.
The same founder-led crew does the whole build: the framing, the 240V circuit and any 120V wiring, the ventilation, the heater and the finish. That matters on a build like the framed room in Sonoma, where the structure and both kinds of wiring had to agree with each other: a project with fewer handoffs between trades is a project with fewer places to go wrong.
Recent work
What we have done in the North Bay
From our own invoices and job records.
- 01
Sonoma: a custom 7’ x 8’ sauna, May 2026
A custom sauna, 7' x 8', fully framed, with the 240V and 120V wiring run by our crew. More about Sonoma.
- 02
Healdsburg: a custom indoor sauna, October 2026
A custom indoor sauna, deposit paid and in progress as of October 2026.
- 03
Napa: a sauna service call, July 2026
A full inspection and diagnostics on an existing sauna.
North Bay towns we serve
We work across both counties. Completed work so far is in Sonoma and Napa, with a build in progress in Healdsburg; Petaluma and Santa Rosa are towns where we have quoted projects.
- 01
Sonoma and Sonoma Valley
The 7' x 8' custom sauna of May 2026. See the Sonoma page.
- 02
Healdsburg and northern Sonoma County
A custom indoor sauna in progress in Healdsburg as of October 2026.
- 03
Napa and the Napa Valley
A service call in July 2026. We service any brand, whoever installed it.
- 04
Petaluma and Santa Rosa
Projects quoted in both. Petaluma sits closest to our Marin base, on the 101 corridor; Santa Rosa is the county seat of Sonoma County.
Building a sauna for a wine country property
Wine country means hot, dry summers, cool nights and winter rain. An outdoor sauna here faces strong sun more than fog, so the exterior finish has to stand up to UV and the dry-to-wet seasonal swing.
Many properties here have more room than a typical inner Bay Area lot, and that opens up the full backyard project: the sauna, a cold plunge, an outdoor shower and the decking that ties them together, designed as one plan. On a larger lot the practical question is distance: how far the 240V circuit runs from the panel, and whether the panel has capacity for it.
Much of this region also lives with wildfire risk, and for an outdoor wood structure near a house, fire-safety rules can shape materials and placement.
Sauna permits in Sonoma and Napa
The permit goes to whoever has jurisdiction over your address: a city's own building department inside city limits, or the county for unincorporated areas, which include much of the countryside in both counties. The rule that does not change is that a new 240V circuit needs an electrical permit. Whether the sauna structure needs a building permit depends on its size, whether it is attached and where it sits on the lot. We confirm the specifics with the right office, file the permits, and meet the inspector. See our Bay Area permit guide.
What we build in wine country
- 01
Backyard wellness zone
Sauna, cold plunge, shower and decking planned as one project. From $39,900.
- 02
Custom outdoor sauna
A standalone cabin designed for the sun, the view and the lot. From $18,900.
- 03
Custom indoor sauna
A full room built into the house, a pool house or a guest cottage. From $12,900.
Starting figures, not quotes. The written number comes after a site visit.
Nearby areas
South of the North Bay is our home county, Marin, with our base in Mill Valley. We also work in San Francisco, the East Bay, the Peninsula, San Jose and, since October 2026, the Sacramento area.
North Bay sauna FAQ
Wine country questions, straight answers.
Do you really come up to Sonoma and Napa?
Yes. We have built a custom sauna in Sonoma, have an indoor sauna underway in Healdsburg, and have done a service call in Napa. We are based in Mill Valley, so the North Bay is a regular drive for us.
Is the hot, dry summer hard on an outdoor sauna?
Strong sun and the dry-to-wet seasonal swing are the main stresses, so we choose an exterior finish for UV. Placing the cabin for afternoon shade helps the wood and the people using it.
My property is large and the house panel is far from where I want the sauna. Is that a problem?
It changes the cost, not the possibility. A longer run for the 240V circuit means more wire and more trenching or routing, and the panel needs capacity for the heater. We measure both on the first visit and price them in the written quote. Our 240V guide explains what goes into it.
Can you build a sauna, cold plunge and shower as one project?
Yes. That is our backyard wellness zone, from $39,900, designed and built as one plan by one crew.
I am outside city limits. Who issues my permit?
Usually the county rather than a city. We confirm which office has jurisdiction over your address and file with them.
2 finished projects
Our work in Sonoma and Napa, photographed on the job.
Towns with a page of their own.
Based in Mill Valley, building across Northern California
Other places we build.
Talk to the people who will build it.
A sauna specialist answers, or you hear back the same day. You talk to the person responsible for the work, not a call center.
(707) 625-5555Mon to Sat, serving the SF Bay Area, Marin, Sonoma, Napa and Sacramento