Sun Prairie, Wisconsin Building Permit Guide

For property in the City of Sun Prairie, permits come from the city’s Building Inspection division in Community Development, at City Hall, 300 E. Main Street (608-825-1184), led by Chief Inspector Dennis Wilken. The city issues one “single source” permit per project that covers the building, electrical, plumbing and heating work, and all applications, including new homes, go through the city’s OpenGov portal. The building portion for a new house is $75 plus 9 cents per square foot of all areas.

What work requires a building permit in Sun Prairie?

The Building Permit page says a permit is needed whenever a project adds to or changes the exterior or interior of a home or any accessory structure, and for any electrical, heating or plumbing work. It lists sample projects and says the list is not complete.

No building permit is needed for new flooring, painting, cabinet replacement that involves no plumbing, electrical or HVAC work, a private sidewalk on your own lot, storm windows and screens, or replacing deck boards. A dumpster enclosure without a roof needs a zoning permit instead.

What Sun Prairie decides and what the state holds

DSPS lists the City of Sun Prairie as a delegated UDC municipality (list current as of 9/24/2026), so city inspectors review and inspect new one- and two-family homes; the Town of Sun Prairie is a separate delegated municipality. The state writes the Uniform Dwelling Code and the commercial code. The city sets its permit and impact fees, zoning, the Title 19 fire code (the Council adopted the International Fire Code with local amendments on March 19, 2024, after creating a municipal fire department), a Secure Entry Ordinance for residential buildings of three or more units (approved May 2, 2023, compliance by January 1, 2024) and a winter street-opening moratorium.

Sun Prairie building department: who handles permitting

The Building Inspection and Code Enforcement Department issues and inspects all construction permits, enforces state building statutes and city ordinances, and handles property maintenance complaints. Planning, zoning and development review sit in the Planning Division of the same Community Development group.

Sun Prairie permit types and filing documents

Because permits are single source, a remodel or addition gets one permit, and any electrical, plumbing or HVAC contractor on the job is attached to it rather than pulling a separate permit; call the office to be associated with an existing project. Applications are made in OpenGov, where the city posts how-to guides for applying, adding guests and scheduling inspections.

Residential permits

• New one- and two-family homes have been accepted only through OpenGov since August 23, 2021. The portal is linked with DSPS, so the state’s own website filing is no longer needed, and the zoning and driveway permit information go into the same application. The application asks whether you need an early start permit, which is paid when you finish applying.
• Additions, porches, basements, decks and sheds need plans, and new garages and sheds also a site plan. Decks and yard sheds carry zoning, aerial imaging and erosion control fees on top of the flat permit fee.
• Rooftop solar on one- or two-family homes, with or without batteries, goes through SolarAPP+, the national automated review platform DSPS has approved; ground-mounted, altered and commercial systems use the city’s regular solar application.

Building or remodeling a home here? Alliance handles residential permit expediting, so the crew isn't waiting on the counter.

Commercial permits

Commercial review is split three ways. Building and HVAC plans that would otherwise go to the state are submitted through E-Plan Exam, which completes reviews within 15 business days of a complete submittal with fees. Since April 7, 2026 the city itself reviews all commercial plumbing plans (exterior and interior), and fire alarm and suppression plans also stay with the city; both are filed in the OpenGov Commercial Plan Review category, and fees are paid before review starts. The Zoning & Development page still says the city reviews projects of all sizes, so confirm the route for building and HVAC plans with Building Inspection. A Building, Mechanical or Fire Plan Compliance Statement must be emailed to the division before some finals.

For tenant improvements and new commercial builds, Alliance handles commercial permit applications through issuance. More on this: commercial building permits explained.

What comes before the building permit

• Planning approvals. Site plans, conditional and special use permits, planned development plans, rezonings and variances go to the Planning Division as PDFs by email, for the Plan Commission or the Board of Zoning Appeals on the 2026 development review calendar.
• Zoning permits. Non-residential zoning permits have their own form; for a new home, zoning is part of the OpenGov application.
• Land division. Certified survey maps and conceptual, preliminary and final plats each have an application form.
• Fire access. New development plans use the Fire Department’s Fire Apparatus Access and Fire Hydrant Worksheet.
• Erosion control. Commercial, industrial and residential developments of more than two units are regulated by the Engineering Department.
• Street openings. Cutting road pavement is prohibited from November 15 to May 1 except in an emergency or with the department’s approval.
• Floodplain. Sun Prairie participates in the National Flood Insurance Program (community 550573) with a flood map effective April 9, 2025.

Sun Prairie building-permit fees and plan review costs

Fees are posted on the Building Inspection Fee Schedules page, which shows no adoption date or resolution number. New construction and additions add a base fee to a per-square-foot charge on all areas: every floor level, the basement, attached garages, decks, porches and roofed space. Group 1 is residential buildings and garages, Group 2 offices, shops, restaurants, schools and similar uses, Group 3 warehouses, factories and other buildings. For alterations, each fee is the greater of the base fee or the per-square-foot charge.

Worked example. A new house measuring 3,000 square feet across all areas pays a building fee of $75 + (3,000 × $0.09) = $345 and $75 + (3,000 × $0.06) = $255 for each of the electrical, plumbing and HVAC portions. With the $50 plan review and the $50 state seal, those lines total $1,210; erosion control, aerial imagery, the street tree fee and the impact fees are added on top.

Development fees. Park development or park impact fees, sanitary sewer connection fees, the sanitary main interceptor fee and traffic impact fees are collected at permitting but vary by project and location, so ask for the figures for your lot; the Planning Division also posts a Westside traffic impact fee page. Refuse and recycling carts are $60 each.

Trade permits and who may pull them

Sun Prairie’s single-source approach means the trade work on a new home, addition or remodel is priced and inspected under the project permit; there are no separate electrical, plumbing or heating permits for that work. Standalone trade jobs, such as a furnace, a water heater, a water softener or an electrical service, are flat-fee permits on the schedule.

Dwelling contractor credentials, electrician and plumber licenses and HVAC registration are state requirements (see Wisconsin rules). The permit holder, whether a company or an individual, is responsible for scheduling every inspection.

Alliance handles electrical permit expediting for contractors here. More on this: who pulls the electrical permit.

How to apply for a Sun Prairie building permit

Review, corrections and what causes delay

All plans and supporting documents must be uploaded during the application itself, whichever platform is used, so missing drawings stop the review. E-Plan Exam’s 15-business-day period starts only when all paperwork and fees are in. Inspections slow down when the inspector cannot find the site; the city says unmarked addresses and lot numbers are making inspections harder and slower to complete.

Sun Prairie construction inspections and closeout

Use one method only: the online inspection request form, an email to Building Inspection or a call to 608-825-1184. For a same-day inspection, ask by 8:00 a.m.; inspectors offer a morning slot (9 a.m. to noon) or an afternoon slot (noon to 3 p.m.), Monday to Friday. Give the address, the inspection type and the contractor’s name and number. New-home permit holders can also schedule and follow inspections in their OpenGov dashboard and add guests who may book them.

• Required visits happen before, during and after the work; the city’s required-inspection sheet for new one- and two-family dwellings lists them for a house.
• Rough and final inspections apply to every permitted project, and only passing the final closes a permit.
• Two business days: the inspector has two business days to inspect before construction may continue, which matches the UDC rule in SPS 320.10.

Special or extra inspection services cost $50 per half hour. A certificate of occupancy is $50 per unit, and some commercial projects must email a compliance statement before the final can be scheduled.

Wisconsin building code

Wisconsin's Uniform Dwelling Code covers one- and two-family homes. Its Commercial Building Code covers public buildings, workplaces and buildings of three or more units. Local ordinances must conform to both. Wisconsin rules

Sun Prairie permit search and official resources

The Construction Reports page links an All Submitted Permits report and a New Construction Permit Revenue report. Under the city’s records policy, the Director of Building Inspection is the legal custodian of building permits and violation records, and the Director of Planning is custodian of development and zoning files; requests for city records are filed in the city’s online public records portal, which also tracks existing requests.

• Sun Prairie Building Inspection home page
• Building Permit: what needs a permit
• Building Inspection fee schedules
• OpenGov permit portal
• New 1 & 2 Family Dwellings
• Inspection Request
• SolarAPP+ for one- and two-family homes
• Erosion Control
• Planning Division
• Zoning & Development applications and calendars
• Construction Reports
• Public Access to Records
• DSPS UDC delegated agents list

Sun Prairie building-permit FAQ

Who issues building permits in the City of Sun Prairie?

The city’s Building Inspection division at City Hall, 300 E. Main Street (608-825-1184); the Town of Sun Prairie issues its own.

Do I need separate electrical or plumbing permits in Sun Prairie?

Not for a new home, addition or remodel: the city issues one single-source permit that covers building, electrical, plumbing and heating work.

Do I need a permit to replace my roof or windows?

Yes; roof replacement, siding and window or door replacement are $75 each for a one- or two-family home. Storm windows and deck boards need no permit.

How much is a permit for a new house in Sun Prairie?

The building portion is $75 plus $0.09 per square foot of all areas, each trade $75 plus $0.06, with $50 plan review, a $50 seal, erosion control and location-based impact fees.

Can I get a same-day inspection?

Same-day requests must be in by 8:00 a.m.; inspections run in morning or afternoon slots between 9 a.m. and 3 p.m. on weekdays, and the inspector has up to two business days.

Where do commercial plans go?

Building and HVAC plans go to E-Plan Exam; plumbing, fire alarm and fire suppression plans are reviewed by the city through OpenGov.

What if I started work without a permit?

The city may double the permit fee and charge a daily fine until the permit is obtained.

Simplify Sun Prairie permitting with Alliance Permitting

Alliance Permitting is a permit documentation and submission company in Wisconsin. We prepare your paperwork, file it correctly and coordinate with the permitting authority through issuance. We are not a contractor and we do not perform licensed plan review or inspections; that work stays with your licensed team and the jurisdiction.

This guide is provided by Alliance Permitting for general information about Sun Prairie permitting. Requirements, fees, and procedures change; confirm details with the permitting authority before relying on them.