A home sauna costs $2,500 to $7,000 installed, with custom builds running past $10,000.1 National averages sit at $4,500 to $6,000 (Fixr, HomeGuide).23 Prices below are national averages* for 2026.
*National averages, not local quotes. Your price depends on sauna type (traditional, infrared, steam), size, wood species, and whether you buy prefab or build custom. Electrical and plumbing work adds $350 to $1,750 (Angi).1
$6,000
average installed, HomeGuide
$50 – $200
per sq ft, Angi
$300 – $2,500
labor, HomeGuide
$4,500
average 4-person sauna, Fixr
Quick math: a 40-sq-ft four-person sauna at Angi’s $50 to $200 per square foot = $2,000 to $8,000, matching its four-person range, our arithmetic.1 The averages disagree ($4,500 at Fixr, $6,000 at HomeGuide) because HomeGuide’s installed band reaches $24,500 custom builds while Fixr’s average is a mid-range four-person steam sauna, our reading.23
Prefab vs custom
| Build | Cost | Source |
|---|---|---|
| Prefab kit (per sq ft) | under $120 | Angi |
| Custom build (per sq ft) | up to $200+ | Angi |
| Indoor prefab room | $2,300 – $10,500 | HomeGuide |
| Custom build (total) | can exceed $10,000 | Angi |
Prefab wins on price and install speed; custom wins on fit and finish. Labor follows the same split: $300 to $1,500 for a prefab kit, $1,500 to $2,500 for a precut kit, and $45 to $200 per hour for fully custom work (Angi).1
Cost by size (Angi)
| Sauna | Typical cost |
|---|---|
| Two-person | $800 – $3,200 |
| Four-person | $2,000 – $8,000 |
| Custom / large | $10,000+ |
Fixr’s low end is a $2,000 Finnish two-person build and its high end a $10,000 infrared with steam generator and mood lighting, bracketing the same range from the other direction.3
Wood species (Fixr, materials per sq ft)
| Wood | Per sq ft | Character |
|---|---|---|
| Pine | $2 – $4 | Budget option, can weep sap at high heat |
| Cedar | $3 – $7 | Classic sauna wood, aromatic, rot-resistant |
| Spruce | $4 – $8 | Light color, low scent, Scandinavian standard |
Cedar dominates mid-budget builds for good reason: it handles heat cycles without warping and smells like a sauna should, our synthesis of the Fixr data.3
Running costs
A 20-minute session costs $0.25 to $0.50 in electricity for an electric heater, or $4 to $8 in store-bought wood for a wood-burning stove (HomeGuide) — electric wins on convenience, wood on ritual, its trade-off.2
DIY options
Prefab infrared and traditional kits are realistic DIY assemblies: panels, heater, and benches bolt together in a day. Home Depot’s sauna section lists current kit prices you can compare against the ranges above (plain link, not affiliate). Budget separately for a licensed electrician if the heater needs a 240V circuit.
Related guides
Home Gym Cost
Hot Tub Cost
Sunroom Cost
Basement Finishing Cost
All cost guides
Sources
1. Angi — How Much Does a Home Sauna Cost?
2. HomeGuide — Sauna Cost
3. Fixr — Sauna Installation Cost