Building permits, zoning and land rules in Buffalo County, Wisconsin

Yes. Buffalo County requires permits for a new home and for another structure intended as sleeping or living quarters¹. New one- and two-family dwellings follow Wisconsin's statewide Uniform Dwelling Code; detached garages and accessory buildings are outside that code's coverage². Construction starts only after plans are approved and the building permit has been issued and posted².

The county's sequence matters: complete the soil test, driveway approval, address assignment, sanitary permit and zoning permit before the state building permit¹. Complete applications are reviewed within 30 days, and typical zoning review takes 1–2 weeks¹. Buffalo County requires inspection of each construction phase before the work is covered².

Start with the Buffalo County Zoning Department at the Buffalo County Courthouse in Alma for the local pieces of a new-home project¹. The office handles zoning, address applications and driveway permits for access entering a county highway, then directs applicants to the county's contracted Uniform Dwelling Code inspector¹.

Secure the sanitary and zoning permits before applying for the building permit¹. Building-permit fees vary with the issuing jurisdiction, while Buffalo County publishes separate sanitary-permit and POWTS service fees^8,9. An owner who occupies or will occupy the home may take out the construction and erosion-control permits, but plumbing and electrical work remain subject to applicable licensed-professional rules².

Zoning varies by location in Buffalo County. The county ordinance applies outside cities and villages only after the applicable town approves it; the towns of Montana and Waumandee are not zoned, although other county ordinances remain in effect there³. Confirm the municipality, town and zoning district before evaluating a parcel³.

Where county zoning applies, the minimum lot area is 2 acres in the ANR-40, ANR-20, ANR-10 and ANR-5 districts, and 1 acre in the Residential district, reduced to 0.25 acres with public sewer⁶. Lot width or road frontage is 100 feet in ANR-40, ANR-20 and ANR-10, and 75 feet in ANR-5 and Residential⁶. Side and rear setbacks are 20 and 40 feet in ANR-40, ANR-20 and ANR-10, 10 and 20 feet in ANR-5, and 10 and 10 feet in Residential, and a structure must also stay back at least its own height from property lines and State, County and Town highways, whichever is greater⁶. Buildings cannot exceed 35 feet in height by default, and residential accessory structures are capped at 24 feet¹⁰. Accessory dwellings are allowed in specified Commercial, Industrial, ANR and Residential districts, subject to size, occupancy, rental, separation, zoning and sanitary conditions⁴.

Each private onsite wastewater treatment system in Buffalo County requires a separate application and sanitary permit, and the permit must be in hand before installing the system or building a structure that requires one⁵. A proposed non-plumbing sanitation system also needs a Buffalo County sanitary permit before construction where that type of system may be used⁵. The Zoning Department administers these permits, and the county tells applicants to connect with a licensed plumber early because the plumber applies and sanitary review can be the longest part of the sequence^1,9.

Buffalo County publishes sanitary-permit fees of $400 for a conventional system, $550 for a pressurized system and $500 for a holding tank⁹. Only state-owned systems go to the Wisconsin Department of Safety and Professional Services; a private landowner applies to the county¹¹. The same office schedules POWTS inspections and asks for one full business day's notice⁹. Only about 8.6% of Buffalo County soils avoid severe limitations for a conventional septic drain field, so complete the soil and site evaluation before finalizing the home site⁷.

We could not confirm a complete county rule for living in an RV on private land. Buffalo County has comprehensive zoning in unincorporated areas, so ask the Zoning Department whether the parcel's district allows the proposed dwelling or temporary occupancy before buying or moving a unit onto the land¹².

Tiny homes have no separate category in the county ordinance, so classification depends on how the structure is built and served⁶. A structure that is not served by a well or private onsite wastewater system can qualify as a recreational dwelling, a permitted use in Agriculture/Natural Resource districts, limited to one per lot (a second needs a Conditional Use Permit) and to no more than 3 months of occupancy per calendar year⁶. Occupied longer, it is treated as a single-family dwelling and must meet dwelling-density rules⁶.

A manufactured home has a defined route: outside a permitted community, the county allows one per lot with a zoning permit, compliance with district standards and a qualifying enclosed concrete foundation¹². We could not confirm a countywide minimum dwelling size, so ask the Zoning Department how it classifies the proposed structure¹.

1. Identify the parcel's municipality and town, then ask the Buffalo County Zoning Department whether county zoning applies and which district, lot-area and setback standards govern^3,4.
2. Complete the soil and site evaluation, then settle driveway access with the town, county or WisDOT, and obtain the address number¹.
3. Have the plumber apply for a separate sanitary permit for each private onsite system; the sanitary permit must precede the building permit^1,5.
4. Stake the building site and obtain any required county zoning permit^1,3.
5. Have a licensed well driller obtain the Wisconsin DNR permit if the new home needs a private well¹.
6. Submit the required forms, fees, plans and prerequisite approvals for UDC review; Wisconsin requires at least two plan sets⁸.
7. Start work after the permit is issued and posted, and schedule each phase inspection before covering work².
8. Occupy the dwelling after a final inspection finds no major health or safety violations; a certificate is not stated as universally required².

Put septic feasibility near the top of due diligence because only about 8.6% of county soils avoid severe limitations for a conventional drain field⁷. Confirm that the parcel meets its district's minimum lot area and leaves a workable building envelope after district-specific setbacks; sewer service and shoreland location can change the lot standard⁴.

Check flood and shoreland status before choosing that envelope because Wisconsin restricts floodway development and Buffalo County's shoreland rules generally use a 75-foot setback from the ordinary high-water mark, subject to stated exceptions or reductions^4,13. A driveway permit must be issued before the address: the town handles town-road driveways, Buffalo County issues permits for driveways entering a county highway, and state highways go through WisDOT¹. The county zoning ordinance also limits a driveway to a 12% grade¹. If a seller is dividing land, ask whether Buffalo County's subdivision rules apply; they cover certain divisions creating five or more parcels or building sites of 1.5 acres or less, including specified successive divisions within five years¹⁴.