Backyard sauna

Decided I wanted a sauna. Learned what one takes, designed it from scratch, and built it standalone in a month of evenings. Six-person, electric heater, and wired into Home Assistant so I can pre-heat it remotely.

Scope

• Materials: ~$4,000
• Build time: ~1 month of evenings
• Capacity: Six-person
• Heat: Electric heater
• Type: Standalone outbuilding
• Smart home: Home Assistant heater control, Govee temp/humidity sensor, Hue strips

Approach

Spent the first stretch reading. There is no "I have built a sauna before" muscle memory; sauna design pulls in framing, vapor barrier, insulation strategy under heat and humidity, bench geometry, and the electrical run for the heater. Worked out a design from research, then built straight through.

Execution

A month of evenings, after the day job. Standalone outbuilding, six-person interior, electric heater. No do-overs and no surprises mid-build.

Smart-home integration

The heater is tied into Home Assistant, so I can start it remotely and walk out to a sauna that is already up to temperature. A Govee Bluetooth temperature and humidity sensor reports conditions inside, so I know exactly when it is ready instead of guessing. Philips Hue light strips shift their color temperature as the room heats up, giving a visual read on the warmth at a glance.