San Francisco · Licensed Sauna Builder
Custom Saunas & Cedar Spas in San Francisco.
Custom saunas, Sauna kit Install, Cedar hot tubs, and cold plunges, designed and built by people who have seen it all.
- We design it for your space, then build it by hand
- Real cedar, hemlock, and spruce, with no chemicals
- Heat and steam that feel just right
- We handle all the city permits for you
Call now: 415-942-0310
About Our Work
Real heat, real wood, and a sauna that lasts.
San Francisco Sauna builds custom saunas, cedar hot tubs, and cold plunges. We work all over San Francisco and nearby towns. We have more than 10 kinds of wood and every type of heater. We do the whole job, from the floor to the roof to the wiring. We build them in basements, in backyards, and on rooftops. We take pride in our work, so you can relax and know it was done right.
Our Services
Saunas, hot tubs, and cold plunges, all built by our own crew.
Service · San Francisco
Custom Sauna Design & Installation
We design and build custom saunas all over San Francisco and the Peninsula. Basements, backyards, rooftops, and business spaces, done from the first drawing to the finished room.
- Licensed California Class B builder, insured and bonded
- A clear plan you approve before we build
- Good, untreated wood: cedar, hemlock, spruce, and more
Service · San Francisco
Sauna Kit Assembly & Build
We put together and finish store-bought and imported sauna kits all over San Francisco and the Peninsula. We do the site prep, the base, the build, the wiring, and the vents, done right the first time.
- Licensed California Class B builder, insured and bonded
- Approved installer for the top heater and kit brands
- Built to Finnish and American sauna standards
Service · San Francisco
Sauna Maintenance & Repair
We fix and take care of any sauna in San Francisco and the Peninsula: yearly check-ups, heater repair, new stones and wood, bench rebuilds, and vent fixes. Most jobs are done in one afternoon.
- Every brand welcome, ours or not
- Most jobs done in one visit
- Licensed California Class B builder, insured and bonded
Service · San Francisco
Cedar Hot Tub Install
We build custom cedar hot tubs by hand for San Francisco homes. Electric or wood-fired, indoor or outdoor, and made to go with a sauna or cold plunge.
- Clear cedar, cut and fit by hand
- Electric or wood-fired heat, indoor or out
- Sealed wood staves, real wood not plastic
Service · San Francisco
Cold Plunge Installation
We design and build custom cold plunges across San Francisco and the Peninsula. Cedar, fiberglass, or steel tubs with the right cooling unit, a clean-water system, and a quiet filter.
- Cedar, fiberglass, and steel plunges
- Right-sized cooling unit holding a steady 39–55°F
- Clean-water system so you skip the daily chemicals
Recent Builds
A few of our recent San Francisco builds.
Here are a few saunas and spas we built for homes around the city.
Edwardian bath conversion
A Pacific Heights bathroom turned into a sauna, lined in soft pale wood with comfy benches and a gentle, even heat.
Cedar barrel in a city garden
A cedar barrel sauna set into a small Noe Valley garden, with a handmade door and bronze parts built to last in the fog and salt.
Sauna and open-air rinse
A Bernal Heights backyard with a cedar sauna and an open-air cold rinse, placed to catch the afternoon sun before you plunge.
Hillside cabin for a crowd
A big cedar sauna built into a St. Francis Wood hillside for a family that likes company, with wide benches and plenty of airflow.
Garden-level hemlock build
A Richmond basement room turned into a warm indoor sauna, lined in hemlock with soft lighting and a heater that makes real steam.
Clear-grain barrel interior
Inside a Glen Park barrel sauna, lined in clean cedar with curved benches and airflow that keeps it fresh, never stuffy.
What Affects the Cost of Custom Sauna Design & Installation
No two saunas cost the same. A few things change the price the most:
- Size and spot. A small indoor sauna costs less than a backyard cabin that needs its own base, power line, and weatherproofing.
- Wood. Some woods cost more than others because of how they look, smell, and hold up.
- Heater and controls. Electric, wood-fired, and steam heaters cost different amounts, and some homes need wiring work.
- Glass and lights. Glass doors, glass walls, windows, and built-in lights add to the cost.
- Building work. New bases, framing, vents, drains, and fixing old wiring all add up.
- Permits. City permit fees change with the size of the job, and we handle all of it.
After we visit and draw the plan, you get one set price for the design, the wood, the labor, and the permits. No surprises.
Cities We Serve
We build for homes all over the city and down the Peninsula.
What San Francisco Homeowners Say
Frequently Asked Questions
How long does a custom sauna take to build?
Most home saunas take about four to eight weeks, from the final plan to your first steam. A backyard cabin takes longer. A simple indoor sauna can be faster. Either way, we give you a real timeline before we start.
Can you fit a sauna into a small or odd space?
Yes. That is the best part of going custom. We have built saunas under stairs, in basements, in closets, and on rooftops. After we visit, we will tell you what your space can hold.
Should I build it indoors or outdoors?
Both work well here. An indoor sauna is easy to use all year. An outdoor sauna feels like a getaway and goes great with a cold plunge. We will help you pick.
Do you handle the permits?
Yes, all of them. As a licensed builder, we file with the city, set up the inspections, and build to code. You never have to chase a form.
Will it make real steam?
Yes, and that is what most saunas get wrong. Good steam needs enough rocks, the right size heater, and vents in the right spots. We plan for that from the start.
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