Do you need a permit for a backyard sauna?
Town by town, for every corner of Dane County: what's required, how far from the lot line, whether wood-fired is allowed, and who to call. Pick your town.
Not sure which town you're in? Your property tax bill names the municipality. Mailing addresses often don't.
MadisonMadison · Yes, a building permit
MiddletonMiddleton · Yes, zoning + building permit
VeronaVerona · Yes, zoning approval always
FitchburgFitchburg · Under 64 sq ft: no structure permit
MononaMonona · Yes, building + zoning permit
McFarlandMcFarland · Yes, any accessory building
Sun PrairieSun Prairie · ≤80 sq ft may be exempt
WaunakeeWaunakee · Yes, and one accessory building per lot
DeForestDeForest · Yes, $80 under 200 sq ft
Cottage GroveCottage Grove · Yes, $75 under 100 sq ft
OregonOregon · Yes, building + zoning permit
StoughtonStoughton · Yes, building + zoning permit
Mount HorebMount Horeb · Yes, building + zoning permit
Cross PlainsCross Plains · Yes, via the building inspector
The short answer, town by town.
Cottage Grove
Yes, $75 under 100 sq ft
- Lot line
- 3 ft
- House
- 10 ft
- Wood
- Ask
Cross Plains
Yes, via the building inspector
- Lot line
- 10 ft
- House
- Per code
- Wood
- OK
DeForest
Yes, $80 under 200 sq ft
- Lot line
- 5 ft
- House
- 5 ft
- Wood
- OK
Fitchburg
Under 64 sq ft: no structure permit
- Lot line
- 4 ft
- House
- Per code
- Wood
- OK
Madison
Yes, a building permit
- Lot line
- 3 ft
- House
- Per code
- Wood
- OK
McFarland
Yes, any accessory building
- Lot line
- 3 ft
- House
- Per code
- Wood
- OK
Middleton
Yes, zoning + building permit
- Lot line
- 3 ft
- House
- Per code
- Wood
- Red flag
Monona
Yes, building + zoning permit
- Lot line
- 3 ft
- House
- 6 ft
- Wood
- OK
Mount Horeb
Yes, building + zoning permit
- Lot line
- 5 ft
- House
- Per code
- Wood
- OK
Oregon
Yes, building + zoning permit
- Lot line
- 5 ft
- House
- Per code
- Wood
- Red flag
Stoughton
Yes, building + zoning permit
- Lot line
- 4 ft
- House
- 10 ft
- Wood
- Red flag
Sun Prairie
≤80 sq ft may be exempt
- Lot line
- 5 ft
- House
- Per code
- Wood
- OK
Verona
Yes, zoning approval always
- Lot line
- 5 ft
- House
- 10 ft
- Wood
- OK
Waunakee
Yes, and one accessory building per lot
- Lot line
- 3 ft
- House
- Per code
- Wood
- OK
Rural Dane County
Often no structure permit, always electrical
- Lot line
- Varies
- House
- Per code
- Wood
- OK
The whole county, in one table.
| Town | Structure permit | Lot line | House | Fee | Wood-fired |
|---|---|---|---|---|---|
| Cottage GroveVillage | Yes, $75 under 100 sq ft | 3 ft | 10 ft | $75–$175 | unclear |
| Cross PlainsVillage | Yes, via the building inspector | 10 ft | — | $150–$250 | OK |
| DeForestVillage | Yes, $80 under 200 sq ft | 5 ft | 5 ft | $80–$180 | OK |
| FitchburgCity | Under 64 sq ft: no structure permit | 4 ft | — | $125–$310 | OK |
| MadisonCity | Yes, a building permit | 3 ft | — | $50–$100 | OK |
| McFarlandVillage | Yes, any accessory building | 3 ft | — | $170–$220 | OK |
| MiddletonCity | Yes, zoning + building permit | 3 ft | — | $80–$160 | red flag |
| MononaCity | Yes, building + zoning permit | 3 ft | 6 ft | $210–$285 | OK |
| Mount HorebVillage | Yes, building + zoning permit | 5 ft | — | $200–$300 | OK |
| OregonVillage | Yes, building + zoning permit | 5 ft | — | $205–$355 | red flag |
| StoughtonCity | Yes, building + zoning permit | 4 ft | 10 ft | $240 | red flag |
| Sun PrairieCity | ≤80 sq ft may be exempt | 5 ft | — | $80–$200 | OK |
| VeronaCity | Yes, zoning approval always | 5 ft | 10 ft | $150–$160 | OK |
| WaunakeeVillage | Yes, and one accessory building per lot | 3 ft | — | $150–$325 | OK |
| Rural Dane CountyUnincorporated towns | Often no structure permit, always electrical | Varies | — | $50–$200 | OK |
Six things that are true in every town.
The details change at each municipal line. These don't.
The heater needs an electrical permit
A sauna heater runs on a dedicated 240V circuit. Every municipality here requires a permit for that work, pulled by a licensed electrician.
A sauna is a heated building
Shed exemptions often assume an unheated building. Madison's says so outright. Don't assume the shed rules cover a sauna.
Setbacks run 3–10 ft
From side and rear lot lines, plus a minimum distance from the house in several towns. Measure before you fall in love with a spot.
Count your outbuildings
Waunakee allows one accessory building, DeForest two, and Verona one foundation-less structure. Cross Plains caps non-garage sheds at 250 sq ft combined.
Burn clean, dry wood
Wherever wood is allowed, burn only clean, seasoned firewood, and don't let smoke become a nuisance to neighbors.
Village ≠ town
Cottage Grove, Oregon and Cross Plains are each a village and a town, with different rules. Check which one your parcel is in.
Three towns where wood needs a written OK.
Some towns banned outdoor wood boilers years ago, and the wording can reach further than intended. In these three, it's worth asking before you choose wood.
- 01MiddletonMiddleton §13.03 and §17.02(5)(b) treat "outdoor solid fuel" heating devices, meaning any not inside a dwelling, as banned or a nuisance. A sauna stove is inside a building, but not a dwelling. Until the city puts an interpretation in writing, an electric heater is the safer choice in Middleton.
- 02Oregon§10.05(13) declares any "outdoor solid fuel fire heating device" a public nuisance, with "outdoor" meaning not inside a dwelling or public building. Interestingly, the fee schedule includes HVAC fees for wood-burning appliances. Ask the village to reconcile the two in writing.
- 03StoughtonSec. 26-43 bans "outdoor fired furnaces," defined as stoves not in a building intended for habitation. A sauna is a building, but arguably not one intended for habitation. Get the fire marshal's written opinion before choosing wood.
A sauna by the water takes more planning.
Everyone on Mendota, Monona, Waubesa and Kegonsa wants a sauna a few steps from the plunge. Shoreland zoning is why it's rarely right at the water's edge.
Wisconsin's shoreland rules (NR 115) apply within 1,000 ft of a lake and 300 ft of a river or stream. Within that zone, structures generally must sit at least 75 ft back from the ordinary high-water mark, with limited exceptions. Dane County administers shoreland zoning in unincorporated towns, and cities and villages may have their own shoreland rules.
In practice: plan the sauna for the upland part of the lot, with a good path down to the pier. Call Dane County Zoning at (608) 266-4266, or your municipality, before you pick the spot. We'll help you work through it on the site visit.
Sauna permit FAQ.
Short answers to the questions we hear on every site visit.
Do you need a permit for a sauna in Dane County?
Almost always. In 12 of the 15 jurisdictions we researched, a backyard sauna needs a structure permit at any size. Fitchburg (under 64 sq ft) and Sun Prairie (80 sq ft or less) exempt small buildings, and unincorporated towns often do too. Every jurisdiction requires an electrical permit for an electric heater's 240V circuit.
Is a barrel sauna considered a shed?
Usually it's treated as an accessory building, like a shed, but with one important difference: it's heated. Madison, for example, exempts small sheds only if they're unheated, so a sauna never qualifies for that exemption.
Can I have a wood-fired sauna in Dane County?
In most towns, yes, often with an HVAC or stove permit. Middleton, Oregon, Stoughton have ordinances against outdoor solid-fuel heating devices whose wording could reach a sauna stove, so get a written interpretation there first, or choose an electric heater.
How far from the property line does a sauna have to be?
Between 3 and 10 ft from side and rear lot lines, depending on the town. Several towns also set a minimum distance from the house (5–10 ft). See the comparison table above for each municipality.
Can I put a sauna next to the lake?
Lakefront lots fall under shoreland zoning, which generally requires structures to sit well back from the water. Wisconsin's statewide minimum is a 75-ft setback from the ordinary high-water mark, with limited exceptions. Talk to Dane County Zoning (or your city, if it administers its own shoreland rules) before you plan a sauna near the shore.
Researched October 5, 2026
We read each municipality's published zoning and building code, permit handouts and fee schedules, assuming a freestanding barrel sauna of 40–70 sq ft, sitting on cradles with no foundation, heated by a wood stove or by an electric heater on a dedicated 240V circuit. Codes change, and inspectors interpret them, so confirm with your town before you build. This guide isn't legal advice. Found something out of date? Let us know.