Sauna Costs Explained
Understanding Home Sauna Costs: What Buyers Need to Know Before Installation
Anonymous
Home saunas are no longer just for luxury estates. Prices now start at $1,500 for a plug-in unit and climb past $10,000 for a custom build, putting in-home heat therapy within reach of a much wider range of buyers, according to Fresno Bee.
The U.S. sauna market generated an estimated $197.6 million in 2024 and is projected to hit $311.4 million by 2033, according to Topture. The boom is driven by a growing "longevity" movement, an aging population, and a new generation of plug-and-play units that renters and condo owners can actually use.
What a Home Sauna Actually Costs to Install
The price you pay depends mostly on which type of sauna you choose. Entry-level infrared units that plug into a standard 120V outlet run $1,500 to $4,000 and can be assembled in about one hour, according to Charlotte Observer. These are the easiest option for renters or anyone who does not want to rewire their home.
Mid-tier prefab kits cost $2,500 to $7,000 and take three to eight hours to assemble. Professional labor adds another $300 to $1,500. Custom traditional saunas start around $4,000 and can exceed $15,000. A 240V electrical circuit upgrade alone can add $1,000 to $3,000 to a custom build, according to Star-Telegram.
Monthly Running Costs Are Lower Than Most Expect
Once installed, a sauna costs less to run than many homeowners assume. An infrared unit uses roughly $10 to $25 per month in electricity. A traditional Finnish-style sauna costs $20 to $50 per month to heat, according to Sacramento Bee.
Each session costs between $0.15 and $0.50 to run. Annual maintenance runs $100 to $250 for infrared models and $150 to $350 for traditional units. Sealing and upkeep costs add another $30 to $100 per year, according to News Observer.
Infrared vs. Traditional: A Real Debate With Money at Stake
Not all saunas are the same — and the type you pick affects both cost and health claims. Traditional Finnish saunas run at 175°F or higher. Infrared units operate at a gentler 120 to 140°F, using light waves to heat the body directly. Harvia, the world's largest sauna company, argues that high heat and steam are essential for the respiratory benefits saunas are known for.
Infrared makers push back. Christopher Kiggins, CEO of SaunaCloud, told Forbes that infrared's "deep tissue penetration" makes it safer for people who cannot handle extreme heat. However, Dr. Khushali Jhaveri warns that the strong health data behind traditional Finnish saunas does not automatically apply to infrared units, which lack equivalent clinical trials, according to KevinMD.
Hidden Savings: HSA Accounts and Tax Rules to Know
There is a financial angle many buyers miss. The IRS allows saunas to be classified as a qualified medical expense — but only if a doctor writes a Letter of Medical Necessity for a condition like fibromyalgia or hypertension. Without that letter, a sauna is treated as a home improvement and is not deductible.
With a valid medical letter, buyers can pay using an HSA or FSA account. That can cut the effective cost by 30 to 40%, making a mid-tier sauna comparable in total cost to a three-year gym membership. Separately, real estate agent Darren Robertson notes that saunas add lifestyle appeal but rarely return dollar-for-dollar in home resale value, according to Sun Herald.
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