Bolthole Index

Walworth County, Wisconsin

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

41Index Score / 100
#68 of 72 in Wisconsin

Building a home on county-zoned land in Walworth County, Wisconsin requires county zoning, sanitary and erosion-control permits before the applicable town building permit1. County general zoning covers unincorporated land except the Town of Bloomfield, while three cities control specified extraterritorial areas23. Walworth County issues sanitary permits and inspects septic installations4.

At a glance

Building permit
Required from the applicable town after county land-use permits on county-zoned property1
Zoning
County zoning generally applies to unincorporated land, with municipal and extraterritorial exceptions23
Septic permit
Required and issued by Walworth County LURM45
Owner-builder
An owner who occupies or will occupy the home may apply for construction and erosion-control permits6
Manufactured home
Allowed where a single-family residence is permitted if the core living area is at least 22 by 22 feet and the home has an enclosed foundation7
Accessory dwelling
Generally one dwelling per property; limited conditional-use review in some districts8
Lot size and setbacks
Depend on the parcel's zoning district910
Private well
State notification is required before most new private-well construction; ask whether a local permit also applies11

Who to call

Planning & zoning

Walworth County Land Use & Resource Management Department

Planning, zoning, sanitation and conservation programs and permits

262-741-4972

lurm@co.walworth.wi.us

100 W Walworth Street, Elkhorn, WI 53121

Zoning

Walworth County Zoning

General and shoreland zoning in areas under county jurisdiction

262-741-4972

100 W Walworth Street, Elkhorn, WI 53121

Also useful

Walworth County Permit Process

The county land-use permit sequence before a town building permit

262-741-4972

Contact details are copied from each office’s official page and were checked against it on October 10, 2026.

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Do you need a building permit in Walworth County, Wisconsin?

Yes. A new home on county-zoned land in Walworth County first needs county zoning, sanitary and erosion-control permits; after those approvals, the owner must obtain the applicable town building permit1. Wisconsin's Uniform Dwelling Code applies to new one- and two-family dwellings, including manufactured homes, and the enforcing agency may vary by municipality12. Detached garages and accessory buildings are outside the dwelling code's coverage, but local land-use permits may still apply13. Construction begins only after the plans are approved and the building permit is issued and posted14. An owner who currently occupies or intends to occupy the completed home may apply for construction and erosion-control permits, but still must follow the other permit and code requirements6.

Who issues Walworth County building permits, and how do you reach them?

For county-zoned property, Walworth County issues zoning, sanitary and erosion-control approvals before the applicable town building permit; elsewhere, the responsible building-permit agency may be the municipality or Wisconsin DSPS1. Start with the Walworth County Land Use & Resource Management Department, which administers county planning, zoning, sanitation and conservation programs15. Reach LURM at 262-741-4972, lurm@co.walworth.wi.us, or 100 W Walworth Street, Elkhorn, WI 5312115. LURM reviews the three county permits together16. Permit fees vary by permit type, and starting covered work without approval can trigger a double county fee1718. Walworth County also warns that it does not request wire transfers to complete or approve permits15.

Does Walworth County have zoning?

Yes, but the authority depends on the parcel. Walworth County's General Zoning Code covers unincorporated land except the Town of Bloomfield, while cities and villages are outside county zoning jurisdiction2. Elkhorn, Fontana and Williams Bay also control zoning in their specified extraterritorial areas3. County shoreland zoning reaches land within 1,000 feet of a lake, pond or flowage, or within 300 feet of a river or stream or the landward edge of the 100-year flood elevation, whichever reaches farther19. Within county jurisdiction, the county publishes 31 zoning districts, and minimum lot area, lot width and setbacks depend on the parcel's district20910. More than one dwelling unit on a property is generally not permitted, so an in-law unit or guest house is limited, with conditional-use review only for planned residential developments in certain districts8. Walworth County also regulates land platting and subdivision activity, so a proposed split needs separate subdivision review21. Only agriculturally zoned land may have an agricultural structure on a vacant parcel without a residence22.

How do septic permits work in Walworth County?

Walworth County LURM issues county sanitary permits and inspects private onsite wastewater system installations for compliance with state codes45. On land without city sewer or sanitary-district service, the septic system is the wastewater treatment facility, and sanitary-permit and state-code requirements still apply23. The reviewed rules do not confirm unrestricted use of a composting toilet, privy, holding tank or other alternative; ask LURM what it will approve for the parcel24. Only 12.9% of Walworth County soils rate without severe limitations for a conventional drain field, so obtain a site evaluation and budget for a system suited to the soil25. County sanitary permit fees are published; examples are $565 for an at-grade system and $1,100 for a large-scale system, and work started without a permit costs a double fee26. Every private onsite wastewater treatment system must be pumped, inspected and reported to the county under the applicable maintenance requirement27. Wisconsin requires a visual inspection at least once every 3 years28.

Can you live in an RV or tiny home in Walworth County?

We could not confirm a county rule that allows residential or long-term RV occupancy on private land in unincorporated Walworth County. The one rule we found covers campgrounds: in the P-1, P-2, C-2 and B-5 shoreland districts, living in a camping unit year-round or using it as a permanent abode or legal residence is prohibited29. Ask the parcel's zoning authority before placing utilities or moving an RV onto the site; authority may rest with the county, the Town of Bloomfield, a municipality or an extraterritorial-zoning city3. We also could not confirm a countywide minimum dwelling size for tiny homes because development standards depend on the applicable zoning district910. A mobile or manufactured home has a clearer path in county zoning jurisdiction: where a single-family residence is permitted, the home must have a core living area of at least 22 by 22 feet and sit on an enclosed foundation7. A short-term rental in unincorporated Walworth County requires a county license after the state license, with possible additional review for private wells or septic systems30.

Building a home in Walworth County: the steps, in order

  1. Identify the parcel's zoning authority and district; county, town, municipal or extraterritorial rules may control331.
  2. Confirm lot area, width, setbacks, shoreland and floodplain constraints before fixing the house location91032.
  3. Submit a complete county zoning application with the required survey and fee18.
  4. Apply for the sanitary and erosion-control permits; LURM reviews those with the zoning permit16.
  5. After county approval, obtain the building permit from the appropriate township building inspector18.
  6. Secure the applicable access permit before constructing a driveway, and obtain a WisDOT connection permit if access enters a state highway3334.
  7. Request the required footing, foundation, rough-work, insulation and final inspections before covering the work35.
  8. Take occupancy only after a final inspection finds no major health or safety violations36.

What should you check before buying land in Walworth County?

Confirm the parcel's zoning authority first because the county does not control cities, villages, Bloomfield's non-shoreland areas or the extraterritorial zoning areas of Elkhorn, Fontana and Williams Bay3. Check the district's permitted uses, lot dimensions and setbacks, and ask about floodplain approvals before relying on a building envelope3132. If the tract will be divided, confirm the county subdivision process before planning the split21. Get a septic site evaluation because only 12.9% of county soils rate without severe limitations for a conventional drain field25. Confirm access: the county publishes a driveway-application process, and state-highway access separately needs a WisDOT connection permit3334. We could not confirm whether Walworth County adds a local well permit beyond Wisconsin's preconstruction notification requirement; ask LURM before drilling11.

Watch-outs

  • The Town of Bloomfield is outside Walworth County's General Zoning Code, although county shoreland rules may still apply2.
  • Elkhorn, Fontana and Williams Bay control zoning in specified extraterritorial areas, so confirm jurisdiction before applying3.
  • Starting county-regulated work without the required approval can result in a double permit fee1718.

Sources

  1. UDC (Uniform Dwelling Code / One- and Two-Family Dwellings), quoted and re-checked
  2. Zoning | Walworth County, quoted and re-checked
  3. Zoning | Walworth County, quoted and re-checked
  4. Sanitation | Walworth County, quoted and re-checked
  5. Sanitation | Walworth County, quoted and re-checked
  6. Instructions for Submitting a UDC Permit Application, quoted and re-checked
  7. Land Use & Resource Management FAQs, quoted and re-checked
  8. Land Use & Resource Management FAQs, quoted and re-checked
  9. Walworth County Zoning Districts FAQ, quoted and re-checked
  10. Walworth County Zoning Districts FAQ, quoted and re-checked
  11. Well and heat exchange notification (Wisconsin statewide rule), quoted and re-checked
  12. UDC (Uniform Dwelling Code / One- and Two-Family Dwellings), quoted and re-checked
  13. Information on Wisconsin’s Uniform Dwelling Code, quoted and re-checked
  14. Wisconsin’s Uniform Dwelling Code (Wisconsin statewide rule), quoted and re-checked
  15. Walworth County Land Use & Resource Management Department (co.walworth.wi.us)
  16. Walworth County Permit Process (co.walworth.wi.us)
  17. Sanitation Fee Schedule, quoted and re-checked
  18. Land Use & Resource Management FAQs, quoted and re-checked
  19. Zoning | Walworth County, WI (2026 county census)
  20. Land Use & Resource Management - Zoning FAQs, quoted and re-checked
  21. Frequently Asked Questions | Walworth County, quoted and re-checked
  22. Land Use & Resource Management FAQs, quoted and re-checked
  23. Sanitation | Walworth County, quoted and re-checked
  24. Wisconsin Administrative Code, SPS 382 (Wisconsin statewide rule), quoted and re-checked
  25. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
  26. Sanitation Fee Schedule, quoted and re-checked
  27. Sanitation | Walworth County, quoted and re-checked
  28. Wisconsin Maintenance Program (Wisconsin statewide rule), quoted and re-checked
  29. Walworth County Code, Sec. 74-189, Recreational and related uses, quoted and re-checked
  30. Short Term Rentals | Walworth County, WI, quoted and re-checked
  31. Walworth County Zoning Districts FAQ, quoted and re-checked
  32. dsps.wi.gov, quoted and re-checked
  33. Permits & Fees | Walworth County, WI, quoted and re-checked
  34. State highway connection permits (driveways & more) (Wisconsin statewide rule), quoted and re-checked
  35. UDC inspection requirements, quoted and re-checked
  36. Information on Wisconsin’s Uniform Dwelling Code, quoted and re-checked

Written October 10, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.

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Compared with neighboring counties

Like all 6 of its neighbors, Walworth County requires a building permit for a home.

RuleWalworth CountyWaukesha CountyRacine CountyKenosha CountyRock CountyJefferson CountyMilwaukee County
Building permitRequiredRequiredRequiredRequiredRequiredRequiredRequired
County zoningYesYesYesYesYesYesYes
Septic permitsCounty Land Use & Resource Management Dept.County Dept. of Parks & Land UseCounty Public Works & Development ServicesCounty Div. of Planning & DevelopmentCounty Public Health Dept.County Planning & Development Dept.Not published

County locator

Walworth County in Wisconsin

41
County map
Walworth County highlighted among the Wisconsin counties · colored by Index score

How Walworth County scores

Seclusion13100% ev.
Self-Sufficiency57100% ev.
Admin Boringness44100% ev.
Durability76100% ev.
Property Autonomy70100% ev.
Carry Cost52100% ev.

Evidence strength: 100%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$412kTypical home
1.4%Property tax
$8,759Land / acre
37"Annual rain
5.9% of yrsSevere drought
2.7 / yr (+2.6)Mid-century 100°F days
12.9 daysMid-century dry spell
1.6" (+5.8%)Mid-century 1-day rain
1.68×Wildfire change factor
100%Forward climate coverage
$1,377Home insurance / yr
1.5% / yrInsurance growth
0.64%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
160,940People within 30 min
10,151,326People within 2 hr
135,121Radius comparison (15 mi)
190.5People / sq mi
0.7%Federal land
89.7%Land at 15% slope or less
12.9%Soils rated "not limited" for septic (strict USDA rating)
43,827 acWorkable land screen
22.5%Wooded land
37 tonsBiomass / forest ac
47.4°FAvg temp

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Cities and towns in Walworth County

Inside a city, town or township here, that government usually sets zoning and may issue its own building permits; the county’s rules above cover land outside them.

Not yet researched: Town of Bloomfield · Village of Bloomfield · Town of Darien · Village of Darien · Delavan · Town of Delavan · Town of East Troy · Village of East Troy · Elkhorn · Town of Geneva · Village of Genoa City · Town of La Grange · Town of Lafayette · Town of Lyons · Town of Sharon · Village of Sharon · Town of Spring Prairie · Town of Sugar Creek · Town of Troy · Town of Walworth · Village of Walworth · Whitewater · Town of Whitewater

Answers from the rulebook for Walworth County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Walworth County rules

  • County-wide zoningPresent (with conditions)

    County general zoning and shoreland zoning in unincorporated Walworth County.

    • The General Zoning Code applies to all unincorporated land except the Town of Bloomfield.
    • Shoreland zoning applies to unincorporated lands within 1,000 feet of a lake, pond, or flowage, or 300 feet from a river or stream, or to the landward edge of the 100-year flood elevation, whichever is greater.
    • County zoning does not apply in documented extraterritorial zoning areas of Elkhorn, Fontana, and Williams Bay.
    “The County's General Zoning Code applies to all lands within unincorporated Walworth County except for the Town of Bloomfield.”
    One more reviewed finding on this topic
    • Present (with conditions) — General and shoreland zoning in unincorporated Walworth County.
      “Walworth County administers two zoning codes within unincorporated areas of Walworth County. Both codes are located in Chapter 74 of the Walworth County Code of Ordinances. The County's General Zoning Code applies to all lands within unincorporated Walworth County except for the Town of Bloomfield.”
  • Local zoningVaries (with conditions)

    Aggregate of county, town, city, village, and extraterritorial zoning across Walworth County.

    • County zoning applies only in its documented unincorporated jurisdiction.
    • Cities and villages zone themselves; certain extraterritorial areas are regulated by Elkhorn, Fontana, or Williams Bay.
    • The county FAQ states that its jurisdiction includes all or portions of 16 towns and excludes cities and villages.
    “The County's zoning jurisdiction does not include cities or villages.”
    One more reviewed finding on this topic
    • Varies (with conditions) — Aggregate local zoning across Walworth County municipalities, towns, and county jurisdiction.
      “Walworth County jurisdiction includes all, or portions of, the 16 Towns in the county. The County's jurisdiction does not include non-shoreland extraterritorial zoning around the city of Elkhorn, Village of Williams Bay, and Village of Fontana. The County's jurisdiction does not include non-shoreland areas in the Town of Bloomfield. The County's zoning jurisdiction does not include cities or villages.”
  • Zoning districtsPublished (with conditions)

    Properties within Walworth County's zoning jurisdiction.

    • The applicable district is determined using the parcel tax-key number and County zoning maps or GIS.
    • The County page states there are 31 zoning districts, including Agricultural, Business, Conservation, Industrial, Park, and Residential districts.
    “If your property is within the County's zoning jurisdiction, it has been designated by a particular zoning district. Each district outlines the zoning requirements (example: Permitted uses, conditional uses, setback requirements, lot area and width requirements, etc.) that are applicable to each zoning district. There are 31 different zoning districts in Walworth County ranging from:”
    One more reviewed finding on this topic
  • Minimum dwelling sizeSpecified

    A mobile home placed in an area where a single-family residence is permitted under Walworth County zoning.

    • The mobile home must have at least a 22-by-22-foot minimum core living area.
    • The mobile home must be placed on an enclosed foundation.
    • The rule applies only in an area that would permit a single-family residence.
    • The County states that its zoning jurisdiction excludes cities and villages, the Town of Bloomfield's non-shoreland areas, and certain extraterritorial zoning areas.

    minimum core living area width: >= 22 ft · minimum core living area length: >= 22 ft

    “The mobile home would have to have at least 22 by 22 feet minimum core living area and be placed on an enclosed foundation to be permitted in an area that would permit a single-family residence.”
  • Minimum lot sizeDistrict specific (with conditions)

    Property within the County's zoning jurisdiction.

    • The applicable zoning district controls lot area and width requirements; County jurisdiction has geographic exceptions and extraterritorial overlays.
    “Each district outlines the zoning requirements (example: Permitted uses, conditional uses, setback requirements, lot area and width requirements, etc.) that are applicable to each zoning district.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Properties within Walworth County zoning districts.
      “Each district outlines the zoning requirements (example: Permitted uses, conditional uses, setback requirements, lot area and width requirements, etc.) that are applicable to each zoning district.”
  • SetbacksDistrict specific (with conditions)

    Structures within the County's zoning jurisdiction.

    • Setbacks vary by zoning district and shoreland applicability.
    “The Walworth County Zoning and Shoreland Zoning Ordinances regulate land use and setbacks from property lines to structures.”
    One more reviewed finding on this topic
    • District specific (with conditions) — Properties within Walworth County zoning districts.
      “Each district outlines the zoning requirements (example: Permitted uses, conditional uses, setback requirements, lot area and width requirements, etc.) that are applicable to each zoning district.”
  • Living in an RVProhibited

    Recreational vehicles, which are included within the ordinance's camping-unit definition, in public or private campgrounds in the P-1, P-2, C-2, and B-5 shoreland zoning districts.

    • Occupancy on a continuous year-round basis or use as a permanent abode or legal place of residence is prohibited.
    • Camping areas must be approved on the site development plan.
    • The rule is subject to ATCP 78/79 and other conditions the Committee may impose after site review and hearing.
    • Shoreland zoning applies to qualifying unincorporated areas within the County's stated shoreland jurisdiction; incorporated municipalities and extraterritorial zoning areas may be governed by other authorities.
    “Public or private campgrounds in the P-1, P-2, C-2, and B-5 districts are subject to the following regulations, ATCP 78/79, and such other regulations as the Committee may deem appropriate after viewing the site or sites and considering evidence presented at the hearing. [...] Occupancy of a camping unit on a continuous year-round basis or utilization of a camping unit as a permanent abode or legal place of residence shall be prohibited.”
  • Manufactured homesLimited

    Mobile or manufactured homes in areas within the County's zoning jurisdiction that permit a single-family residence.

    • The mobile home must have at least a 22-by-22-foot minimum core living area.
    • It must be placed on an enclosed foundation.
    • The area must permit a single-family residence.

    minimum core living area: 22 by 22 feet

    “The mobile home would have to have at least 22 by 22 feet minimum core living area and be placed on an enclosed foundation to be permitted in an area that would permit a single-family residence.”
  • Accessory dwellingsLimited

    In-law units, guest houses, and other additional dwelling units in county zoning jurisdiction.

    • More than one dwelling unit is generally not permitted.
    • Conditional-use review may apply to planned residential developments in certain zoning districts.
    • Minimum lot-area requirements apply to the referenced conditional uses.
    “In general, more than one dwelling unit on a property is not permitted. The zoning ordinances provide for conditional use review of planned residential developments in certain zoning districts based on minimum lot area requirements.”
    One more reviewed finding on this topic
    • Limited — An additional dwelling unit, in-law unit, or guest house in the County's zoning jurisdiction.
      “In general, more than one dwelling unit on a property is not permitted. The zoning ordinances provide for conditional use review of planned residential developments in certain zoning districts based on minimum lot area requirements.”
  • Who permits septicCounty

    Sanitary permits and septic-system review administered by Walworth County Land Use and Resource Management.

    • The county sanitary permit addresses location, type, and size of the septic system.
    • County permits are issued together with zoning and erosion-control permits for a single-family residence.
    “The Walworth County Land Use and Resource Management Department reviews and issues all three permits together to assure fewer problems in the construction process.”
    One more reviewed finding on this topic
    • County (with conditions) — Private onsite wastewater treatment systems in Walworth County.
      “LURM issues all Sanitary Permits for the County and inspects all system installations for compliance to State codes.”
  • Septic permitRequired

    Septic systems for a single-family residence in the county's permitting jurisdiction.

    • The sanitary permit regulates where, what type, and size of septic system is installed.
    • Requirements may differ where public sewer or another authority applies.
    “A sanitary permit, which regulates where, what type and size of septic system is being installed on the property.”
    One more reviewed finding on this topic
    • Required — Private sewage systems and applicable sanitary work in Walworth County.
      “A sanitary permit, which regulates where, what type and size of septic system is being installed on the property.”
  • Septic inspectionLimited

    Existing septic systems reviewed for Walworth County short-term-rental applications.

    • If the county sanitary permit contains sufficient information and the three-year maintenance requirement is current, no further evaluation is needed.
    • If no permit exists or the information is insufficient, a licensed professional must evaluate and inspect the system and return the report to the county.
    • The inspection may result in replacement requirements.
    “If no Sanitary Permit is on file with the County or a Sanitary Permit does not provide the necessary information to complete the review of the application, then an appropriately licensed professional(s) will need to evaluate and conduct an inspection of the existing septic system”
    One more reviewed finding on this topic
    • Required — POWTS installations and ongoing septic maintenance in Walworth County.
      “State law requires every Private Onsite Wastewater Treatment System (often referred to as a septic system) to be pumped, inspected and reported to the County in which the system is located.”
  • Off-grid sanitationLimited

    Properties without city sewer or sanitary-district service.

    • The County states that a septic system is the wastewater treatment facility when the property is not hooked up to city sewer or a sanitary district.
    • Sanitary permits and applicable State-code requirements still apply.
    “If the property is not hooked up to city sewer or a sanitary district, the septic system is your wastewater treatment facility (POWTS - Privately Owned Wastewater Treatment System).”
  • Agricultural exemptionConditional

    Agricultural-related structures on a vacant parcel in the County's zoning jurisdiction.

    • Only agricultural-zoned land may have agricultural-related structures on a parcel without a residence.
    “No. Only Agricultural zoned land can have agricultural-related structures on a parcel without a residence.”
  • Subdividing landRegulated (with conditions)

    Land divisions, subdivisions, and certified survey maps in Walworth County.

    • The county has plat-review authority and administers the county subdivision-control ordinances.
    • Specific review requirements depend on the proposed land division.
    “Walworth County has plat review authority for land divisions in Walworth County. The County also administers the Walworth County Subdivision Control Ordinances.”
    One more reviewed finding on this topic
    • Regulated (with conditions) — Land platting and subdivision activity administered by Walworth County.
      “The following ordinances are regulated: [...] Subdivision Ordinance [...] Zoning Ordinance”
  • Driveway accessRequired

    Driveways accessing County-maintained roads or County rights of way.

    • The Public Works application requires the appropriate form and fee.
    • The application is reviewed for compliance before contact by fax or phone.
    “As part of its maintenance responsibility, Walworth County Public Works is responsible for controlling all construction activities in County-maintained rights of way, including driveways that access County roads. This page should help you obtain a right of way permit:”
  • Short-term rentalsLimited

    Short-term rental operations in unincorporated Walworth County.

    • A County short-term-rental license is required under the County licensing code.
    • A state license must be obtained before the County can approve the license.
    • Private wells and septic systems may trigger additional testing, review, or inspection requirements.

    adoption date: April 19, 2018

    “On April 19, 2018, the Walworth County Board of Supervisors adopted a Short Term Rental Licensing code for properties in unincorporated Walworth County.”
  • Permit feesPublished (with conditions)

    Walworth County sanitary permits and related sanitation reviews.

    • The sanitation fee schedule is effective January 1, 2025.
    • Examples include $565 for an at-grade system, $750 for a holding tank, $1,100 for a large-scale system of 3,000 gallons per day or greater, and double permit fee for work started without a permit.
    • Some listed fees include a $100 state fee or a $30 Register of Deeds filing fee.

    at-grade sanitary permit fee: 565 USD (Includes $100 state fee.) · large-scale system threshold: >= 3000 gallons/day · large-scale sanitary permit fee: 1100 USD (Includes $100 state fee.)

    “Effective January 1, 2025 [...] At-Grade System *$565 [...] Large Scale System (3,000 gallons/day or greater) *$1,100”
    One more reviewed finding on this topic
    • Published (with conditions) — County sanitation and right-of-way permit fees.
      “SANITATION FEE SCHEDULE Effective January 1, 2025 [...] Large Scale System (3,000 gallons/day or greater) *$1,100 [...] Reinspection Fee $100 [...] Work Started without a Permit Double Permit Fee”
  • Permit processPublished (with conditions)

    County zoning, sanitary, erosion-control, and related permit processing.

    • A zoning application must be complete and include a plat of survey and required fee.
    • Construction started without permit approval is charged a double fee.
    • If a County zoning permit is issued, the owner must obtain a building permit through the appropriate Township Building Inspector.
    • The zoning permit process includes review, issuance or denial, possible appeal within 30 days, and a foundation survey or inspection/waiver requirement.

    zoning permit validity: 2 years · appeal period: 30 days (appeal to Walworth County Board of Adjustment)

    “A zoning permit application form must be completely filled out and a plat of survey (prepared by a registered land surveyor showing all existing and proposed structures) shall be attached to the permit application, including the required fee. Any construction started without permit approval will be charged a double fee. Additional supporting materials may be required for certain projects such as building plans, grading plans, existing and proposed contours, etc.”
    One more reviewed finding on this topic
    • Published (with conditions) — County zoning, sanitary, and erosion-control permitting for a single-family residence.
      “If the permit is issued, the property owner must obtain a Building Permit through the appropriate Township Building Inspector.”

Wisconsin rules that apply here

  • Building permitRequired

    New one- and two-family dwellings covered by Wisconsin’s Uniform Dwelling Code, including covered additions and alterations.

    • The cited brochure states that permit requirements for alterations and additions vary by municipality.
    • Construction begins only after plans are approved and the building permit is issued and posted.
    • The enforcing jurisdiction may be the municipality, county, or state.
    • Local zoning, land-use, floodplain, sanitary, well, driveway, utility, and other approvals may also be required.
    • A building permit cannot be issued for a new dwelling using a private onsite wastewater treatment system until a sanitary permit has been issued.
    “Begin construction after plans are approved and building permit is issued and posted.”
    One more reviewed finding on this topic
  • Owner-builder exemptionConditional

    An owner obtaining construction and erosion-control permits for a dwelling covered by the Wisconsin Uniform Dwelling Code.

    • The owner must occupy the home currently or will occupy it after completion.
    • The exemption permits the owner to take out the construction and erosion-control permits without the state-certified Dwelling Contractor and Dwelling Contractor Qualifier arrangement described for contractors.
    • The owner-occupancy statement must be checked on the permit application if the applicant does not possess Dwelling Contractor certification.
    • The source describes an owner-occupancy condition; it does not establish a general exemption for non-occupant owners.
    “The construction and erosion control permits must be taken out by a state-certified Dwelling Contractor, who also employs a state-certified Dwelling Contractor Qualifier, or by the owner who occupies the home currently or will after completion.”
    2 more reviewed findings on this topic
    • Available (with conditions) — An owner who currently occupies or will occupy the home after completion.
      “The construction and erosion control permits must be taken out by a state-certified Dwelling Contractor, who also employs a state-certified Dwelling Contractor Qualifier, or by the owner who occupies the home currently or will after completion.”
    • Conditional — Owner-occupants applying for UDC erosion-control or construction permits.
      “Owner and Contractor Information (as applicable)”
  • Building code adoptedAdopted (with conditions)

    Public buildings, places of employment, and multifamily buildings subject to Wisconsin's commercial building code.

    • The Division of Industry Services reviews plans before construction for compliance with state statutes and building codes.
    • Local certified municipalities may provide plan review and inspection services for certain building types.
    • The Wisconsin Commercial Building Code adopted the 2021 ICC effective September 1, 2025; plans submitted November 1, 2025 or later must comply with the updated code.
    • Municipalities may have grandfathered fire detection, prevention, and suppression ordinances under 2013 Act 270.

    2021 ICC adoption date: September 1, 2025 (The deadline for building plan compliance was delayed.) · updated-code plan-submission deadline: November 1, 2025 (Plans submitted on or after this date must comply with the updated Commercial Building Code.)

    “2013 Act 270 establishes a uniform commercial building code in Wisconsin while allowing municipalities to grandfather fire detection, prevention, and suppression ordinances”
    5 more reviewed findings on this topic
    • Adopted (with conditions) — New one- and two-family dwellings covered by Wisconsin's Uniform Dwelling Code.
      “The statewide code for new homes in Wisconsin is the Uniform Dwelling Code (UDC), SPS 320-325 of the Wisconsin Administrative Code and its adopted references. It is a uniform building code that applies across the state.”
    • Adopted (with conditions) — New one- and two-family dwellings, including manufactured homes, in Walworth County.
      “The program governing one- and two-family dwelling units (including manufactured homes) is also called the UDC program, referring to the Uniform Dwelling Code. Enforces construction standards and inspection procedures including evaluation of building materials.”
    • Adopted (with conditions) — New one- and two-family dwellings in Wisconsin built since June 1, 1980.
      “The Uniform Dwelling Code (UDC) is the statewide building code for one- and two-family dwellings built since June 1, 1980.”
    • Adopted (with conditions) — New Wisconsin one- and two-family dwelling construction, including stick-built, modular, and manufactured home installations
      “A permit under the UDC is required for new one- and two-family dwelling units. This includes stick-built, modular, and manufactured home installations.”
    • Adopted — Wisconsin's Uniform Dwelling Code, chapters SPS 320-325, for new one- and two-family dwelling units, including stick-built, modular, and manufactured home installations.
      “SPS 320-325 Uniform Dwelling Code (UDC), construction standard for 1-2 family dwelling units, applies uniformly statewide”
  • InspectionsRequired

    Each phase of construction of a one- or two-family dwelling governed by the Wisconsin Uniform Dwelling Code.

    • Inspections are called for before each phase is covered up.
    • The local inspector’s instructions apply.
    • The inspector has two business days after the inspection request and the work being ready to inspect before the work may be covered.
    • Inspections check compliance with the code and may also check compliance with approved plans.
    • The UDC is enforced by municipal or county building inspection departments or the Wisconsin Division of Industry Services.

    inspection response period: 2 business days (After the inspection request and the work is ready to inspect, before the work may be covered up.)

    “Call for inspections of each phase of construction prior to covering it up - check the local inspector’s instructions. The inspector has two business days after the date that you make the inspection request and the work is ready to inspect, before you may cover up the work. Inspectors will check for compliance with the code.”
    2 more reviewed findings on this topic
    • Required — UDC-covered construction in Wisconsin, including Walworth County.
      “Call for inspections of each phase of construction prior to covering it up - check the local inspector’s instructions. The inspector has two business days after the date that you make the inspection request and the work is ready to inspect, before you may cover up the work. Inspectors will check for compliance with the code.”
    • Required — New one- and two-family dwellings.
      “The Building Inspector at the Township level reviews and inspects construction relative to compliance with the State of Wisconsin Uniform Dwelling Code.”
  • Certificate of occupancyLimited

    Occupancy of a dwelling governed by Wisconsin’s Uniform Dwelling Code after construction.

    • Occupancy follows a final inspection in which no major health or safety violations are found.
    • Some municipalities will issue occupancy permits; the state source does not state that every municipality must issue a certificate or occupancy permit.
    • The dwelling exterior must be completed within two years after permit issuance.

    exterior completion deadline: 2 years after permit issuance

    “Take occupancy after receiving a final inspection in which no major health or safety violations are found. (Some municipalities will issue occupancy permits.) Also, the dwelling’s exterior must be completed within two years after permit issuance.”
    One more reviewed finding on this topic
    • Limited — Occupancy of UDC-covered dwellings after construction.
      “Take occupancy after receiving a final inspection in which no major health or safety violations are found. (Some municipalities will issue occupancy permits.) Also, the dwelling’s exterior must be completed within two years after permit issuance.”
  • Lot coverageSpecified

    Impervious-surface coverage in the statewide shoreland framework and the DNR county model ordinance for qualifying shoreland lots or parcels.

    • The general standard applies to construction, reconstruction, expansion, replacement, or relocation of impervious surfaces within 300 feet of the ordinary high-water mark on riparian lots and parcels entirely within 300 feet of the ordinary high-water mark.
    • The general standard is 15 percent.
    • A lot or parcel may exceed 15 percent but not exceed 30 percent with a permit and mitigation plan.
    • For highly developed shorelines, counties are not required to adopt the special standards; if adopted, residential coverage may exceed 30 percent but not exceed 40 percent with a mitigation plan.
    • Treated impervious surfaces and defined roadways and sidewalks may be excluded from calculation when the ordinance conditions are met.

    general impervious-surface limit: <= 15 percent of lot or parcel · maximum under general standard with mitigation: 30 percent of lot or parcel (permit and mitigation plan required) · highly developed shoreline residential maximum: 40 percent of lot or parcel (special standard adopted and mitigation plan required)

    “The percentage of impervious surface allowed on a lot or parcel described under section 11.2 and as calculated under section 11.3 shall not exceed 15%.”
  • Building heightSpecified

    Structures within 75 feet of the ordinary high water mark of navigable waters in Wisconsin shoreland zoning areas.

    • The DNR model ordinance identifies this as the NR 115.05(1)(f) height standard for county shoreland ordinances.
    • The prohibition does not extend beyond 75 feet from the ordinary high water mark under the stated standard.
    • Counties may regulate height beyond 75 feet through local ordinance.

    maximum structure height within 75 feet of ordinary high water mark: <= 35 feet (A structure taller than 35 feet is prohibited within the specified area.)

    “A structure taller than 35 feet within 75 feet of the ordinary high-water mark of any navigable waters is prohibited”
  • Well permitLimited

    Construction of private wells statewide in Wisconsin.

    • A Well Construction Notification Number must be obtained before constructing a new private well that is not a high-capacity well.
    • Exceptions to the notification requirement include high-capacity wells, reconstruction of existing wells, and wells on Native American property; high-capacity wells or other wells requiring written DNR approval follow the approval requirements.
    • Some DNR-approved county ordinances additionally require a well permit before construction.
    • A Well Construction Report must be submitted to DNR within 30 days after construction.

    well construction notification fee: 50.5 USD (Fee and notification number are not refundable or transferable.) · well construction report deadline: 30 days after construction

    “Wisconsin law requires that a property owner provide advance notice to DNR before construction of any new private well that is not a high capacity well, and advance notice of any heat exchange drillhole construction (geothermal system) that does not require a written DNR approval.”
    One more reviewed finding on this topic
    • Required — A home using a private well in Wisconsin, including Walworth County.
      “Obtain sanitary or well permits from the county or municipality if the home will use a private sewage system or well.”
  • Mandatory utility hookupWater and sewer (with conditions)

    Pre-installation water and sewer systems in a manufactured/mobile home park in Wisconsin.

    • Pre-installation plumbing-system plan review is required.
    • Submitted plans must comply with the Wisconsin Plumbing Code.
    • A conditional approval letter gives permission to start construction.
    • Local permitting requirements remain pending.
    “Pre-installation plan review of the water and sewer systems in a manufactured/mobile home park is required as a plumbing system plan review via esla.wi.gov.”
  • Building in a floodplainLimited

    Development in Wisconsin floodplains, including floodway and floodfringe areas.

    • Floodplain development typically requires a land use permit and a building permit.
    • In the floodway, new structures, substantially improved or damaged structures, hazardous or solid-waste storage, and wells or sewage systems are prohibited.
    • Floodway development is limited to open-space uses with low flood-damage potential unless the stated analysis or FEMA map-revision condition is met.
    • Floodfringe structures must have the first floor elevated two feet above base flood elevation and have dryland access.
    • Substantially damaged structures are subject to the stated 50-percent threshold and applicable elevation or relocation requirements.

    floodfringe first-floor elevation: >= 2 feet above base flood elevation (for all new and substantially damaged or improved structures in the floodfringe)

    “In the floodway, new structures, substantially improved or damaged structures, the storage of hazardous/solid waste and wells/sewage systems are prohibited.”
    2 more reviewed findings on this topic
    • Required — UDC-covered construction requiring floodplain, zoning, or land-use approval.
      “Obtain floodplain, zoning and land use approvals from the county and municipality having authority.”
    • Limited — Development within floodplain areas regulated by a Wisconsin community floodplain zoning ordinance based on the DNR model and state minimum standards.
      “A land use permit shall be obtained before any development; repair, modification, or addition to an existing structure; or change in the use of a building or structure, including sewer and water facilities, may be initiated.”
  • Campground & park staysLimited

    Recreational trailers, pickup truck campers, and motor homes occupying campsites in Wisconsin State Park System family campgrounds.

    • Camping reservations are required before setting up on any site.
    • A campsite may contain no more than one recreation trailer, pickup truck camper, or motor home.
    • No person may camp or leave a camping unit in a family campground for more than 14 days in any 21 days.
    • Pickup campers or motor homes pulling a trailer are treated as a single unit.

    maximum camping-unit occupancy per campsite: 1 recreation trailer, pickup truck camper, or motor home (Pickup campers or motor homes pulling a trailer are treated as a single unit.) · maximum stay: 14 days in any 21 days

    “A campsite may be occupied by no more than one recreation trailer, pickup truck camper or motor home. Pickup campers or motor homes pulling a trailer are treated as a single unit. [...] No one may camp or leave a camping unit in a family campground for more than 14 days in any 21 days.”
    3 more reviewed findings on this topic
    • Limited — Occupancy of recreational vehicles, including recreation trailers, pickup truck campers, motor homes, camper vans, and truck campers, at Wisconsin State Park System campsites.
      “A campsite may be occupied by no more than one recreation trailer, pickup truck camper or motor home. Pickup campers or motor homes pulling a trailer are treated as a single unit.”
    • Limited — Temporary camping at Wisconsin State Park System properties.
      “Camping reservations are required and can be made up to 11 months in advance of your planned date of occupancy. Campers must make a reservation before setting up on any site.”
    • Limited — Temporary camping in Wisconsin State Park System family campgrounds.
      “Camping reservations are required and can be made up to 11 months in advance of your planned date of occupancy. Campers must make a reservation before setting up on any site. [...] No one may camp or leave a camping unit in a family campground for more than 14 days in any 21 days. [...] Not all properties offer camping during non-summer months. Camping seasons vary by property.”
  • county zoning authorityGeneral

    Wisconsin counties may enact and amend county zoning ordinances under Wis. Stat. § 59.69 for participating towns, which are generally unincorporated areas.

    • County zoning applies only in towns that have adopted county zoning.
    • After a comprehensive revision of the county zoning ordinance, the town has authority to decide whether county zoning applies in the town.
    • Towns have authority to approve or disapprove amendments to a county zoning ordinance.
    • A town that does not fall under county zoning may be unzoned or may have its own town zoning ordinance.
    “Counties exercise zoning ordinances under s. 59.69, Wis. Stats. County zoning only applies in towns that have adopted county zoning.”
  • county building authorityGeneral

    Wisconsin county authority to administer construction and inspection of new one- and two-family dwellings, including in unincorporated areas, through the UDC delegation and inspection framework.

    • Counties must have delegated authority to exercise UDC jurisdiction.
    • A county with delegated authority has jurisdiction over new one- and two-family dwellings in cities, villages, and towns that do not have their own delegated authority.
    • The DSPS page directs applicants to the municipality when it has delegated authority and otherwise to DSPS or the appointed county inspector.
    • The authority described is for construction and inspection under the statewide UDC; local zoning, land-use, sanitary, floodplain, and other requirements may still apply.

    covered construction: new one- and two-family dwellings (Jurisdiction depends on DSPS delegation and whether the municipality has its own delegated authority.)

    “Counties: Counties with delegated authority have been authorized jurisdiction over the construction and inspection of new one- and two-family dwellings in cities, villages, and towns which do not have their own delegated authority.”
    2 more reviewed findings on this topic
    • General — County authority to enforce the statewide Uniform Dwelling Code and administer building inspection and permitting for new one- and two-family dwellings in Wisconsin, including unincorporated areas where the county is the responsible inspection authority.
      “The UDC is primarily enforced by municipal or county building inspectors who must be state-certified. In lieu of local enforcement, municipalities have the option to have the state provide enforcement for just new homes.”
    • Limited — County enforcement of Wisconsin’s Uniform Dwelling Code for new one- and two-family dwellings in municipalities, including towns, that do not have their own delegated authority
      “Counties: Counties with delegated authority have been authorized jurisdiction over the construction and inspection of new one- and two-family dwellings in cities, villages, and towns which do not have their own delegated authority.”

Set by your township or city, not the county

In Wisconsin, zoning is adopted by each township or city, so Walworth County has no county-wide answer on these. Find your township or city in the list of places on this page, or call its clerk or zoning administrator.

  • Camping on your land
  • Tiny homes

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Living off-grid in Walworth County, Wisconsin

Is Walworth County a good place to live off-grid or homestead?

Walworth County scores 41/100 on the Bolthole Index, a marginal county profile. Its strengths: mixed durability signals and a stronger property-autonomy legal backdrop. Watch-outs: about 160,940 people within a 30-minute drive.

Do you need a building permit in Walworth County, Wisconsin?

Walworth County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by Walworth County Land Use & Resource Management Department. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Walworth County, Wisconsin?

Land in Walworth County runs about $8,759 per acre, based on the latest county data.

What is the water situation in Walworth County?

Walworth County gets about 37" of rain a year, with severe drought in roughly 5.9% of years.

How remote is Walworth County?

A representative private-land location has about 160,940 people within a 30-minute drive and 10,151,326 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

How Walworth compares in Wisconsin

Compare side-by-side →See all 72 Wisconsin counties ranked →