Bolthole Index

Winnebago County, Iowa

Building permits, zoning and septic rules in Forest City, Iowa

Forest City, Iowa requires an Application for Zoning Compliance Certification for projects that build up or out, with building permit applications processed at City Hall.1 Forest City sets residential zoning standards; Winnebago County Environmental Health handles private septic and well permits in Winnebago County.23 Public sewer availability can change both the required residential lot size and whether a private septic system is allowed.24

At a glance

Building permit
Apply at City Hall; initial fee $3515
Zoning
City residential and agricultural districts have different standards26
RS lot area
6,000 square feet; at least one acre without public sewer2
RS setbacks
Front 20 feet, side 6 feet, rear 20 feet7
Private septic
Construction permit required before installation or alteration4
Accessory dwelling
Iowa city ADU protections apply subject to statutory conditions8
Owner-builder
Own-property contractor-registration exclusion does not waive project approvals9

Who to call

Building permits

Forest City City Hall — Building and Zoning Applications

Building/zoning applications, rezoning requests, variance applications and city utility connection applications

641-585-3574

305 N. Clark Street, PO Box 346, Forest City, IA 50436

Building permits

Forest City City Hall — Construction Application Process

Published routing and approval process for city construction applications

Septic permits

Winnebago County Environmental Health (Winnebago County Sanitation)

Septic and well permits, well-water testing, well work assistance, and radon test kits

641-208-7652

126 S Clark St., Forest City, IA 50436

Contact details are copied from each office’s official page and were checked against it on October 12, 2026.

Off-grid gear

Going off-grid in Forest City means bringing your own water and power. The kit we’d start with:

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Do you need a building permit in Forest City, Iowa?

Forest City calls its building permit an Application for Zoning Compliance Certification, and requires the form when a property owner plans to build up or out.1 The initial building permit fee is $35; a variance or special-exception application costs $230.5 Send the application to Forest City City Hall rather than the county zoning office.1 We could not confirm Forest City’s adopted building-code edition, general inspection schedule or certificate-of-occupancy requirements; ask City Hall to identify the approvals needed for your particular home before construction.1

Who handles building and zoning applications in Forest City?

Forest City City Hall processes building permit applications and provides the route for zoning questions, rezoning and Board of Adjustment requests.1 Call 641-585-3574 or use the city’s Permits & Applications page to obtain the forms.1 Forest City’s published construction workflow sends the application through Water/Wastewater, Street and Line Superintendents before final approval by the City Administrator.10 A denial comes with a reason; projects needing a variance or special exception use the Board of Adjustment process.105

Does Forest City have zoning, and what are the lot sizes and setbacks?

Forest City’s RS Residential Single-Family District requires at least 6,000 square feet of lot area, but at least one acre where public sewer facilities are unavailable.2 RS minimum yards are 20 feet in front, 6 feet at the side and 20 feet at the rear.7 Forest City’s AG Agricultural District instead requires 2 acres for a dwelling.6 Those are district-specific standards: ask City Hall to identify the parcel’s district and review the proposed footprint before you buy plans.1 A proposal exceeding the city’s size or property-line restrictions may require a Board of Adjustment variance.1

How do septic permits and water connections work in Forest City?

Iowa requires a construction permit before installing or altering a private sewage disposal system, and newly constructed systems need a final inspection before backfilling.4 In Winnebago County, private septic and well permits go through County Environmental Health, whose current service page lists septic permits at $200 and well permits at $175.311 Forest City lists separate city water-service and residential/commercial sewer-service application fees of $750 and $50.5 Sewer availability must be resolved before designing an off-grid system: Iowa generally bars installing, repairing or rehabilitating a private system where public treatment is available or a local ordinance requires connection.4 Ask City Hall about sewer availability and Environmental Health about private-system eligibility for the address.111

Can you live in an RV or tiny home in Forest City?

We could not confirm Forest City’s rules for living in an RV on private land, temporary camping or occupying a tiny home; ask City Hall about the proposed use before relying on a lot for housing.1 For an accessory dwelling, Iowa’s city ADU law requires at least one accessory dwelling on a single-family residence lot in a district allowing that principal use, subject to applicable building regulations and statutory restrictions.8 The ADU size limit is 1,000 square feet or 50 percent of the main residence’s size, whichever is larger; deed restrictions and historic-preservation conditions can still matter.8 Ask City Hall how that law applies to your proposed unit.1

Building a home in Forest City: what should you do first?

  1. Ask Forest City City Hall to identify the zoning district and compare your proposed lot and building layout with the city’s district standards.12
  2. Resolve water and sewer connections with City Hall; if private sanitation is proposed on a Winnebago County address, contact County Environmental Health before system construction.134
  3. Submit the city building/zoning application and initial fee for the city’s review and approval workflow.110
  4. Ask about floodplain development approval: Forest City requires a floodplain development permit in designated floodplain areas, with new or substantially improved residential lowest floors, including basements, at least 1 foot above base flood elevation.12

For land outside city limits, use the Winnebago County guide: county zoning governs unincorporated land.13

Watch-outs

  • Forest City’s no-public-sewer RS lot minimum is one acre, so sewer availability can change whether a small lot meets the residential standard.2
  • Iowa’s own-property contractor-registration exclusion does not waive building permits, code compliance or inspections.9
  • Qualifying Iowa transfers of property with private sewage systems require a certified inspection, subject to statutory exceptions.14

Sources

  1. Forest City City Hall — Building and Zoning Applications (cityofforestcity.com)
  2. 165.28 RS – Residential Single-Family District (Forest City), quoted and re-checked
  3. Zoning Department - Winnebago County, Iowa, quoted and re-checked
  4. Chapter 69 — Private Sewage Disposal Systems (Iowa statewide rule), quoted and re-checked
  5. Permits & Applications (Forest City), quoted and re-checked
  6. 165.26 AG – Agricultural District (Forest City), quoted and re-checked
  7. 165.28 RS – Residential Single-Family District (Forest City), quoted and re-checked
  8. legis.iowa.gov (Iowa statewide rule), quoted and re-checked
  9. Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
  10. Forest City City Hall — Construction Application Process (cityofforestcity.com)
  11. Winnebago County Environmental Health (Winnebago County Sanitation) (winnebagocountyiowa.gov)
  12. Flood Plain Development Application/Permit (Forest City), quoted and re-checked
  13. Zoning Ordinance for the Unincorporated Portion of Winnebago County, Iowa, quoted and re-checked
  14. Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), quoted and re-checked

Written October 12, 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.

Answers from the rulebook for Forest City

Forest City’s own rules

  • Minimum lot sizeSpecified

    Single-family residential development in the RS Residential Single-Family District.

    • Where public sewer facilities are not available, not less than one acre of lot area is required.

    minimum lot area: >= 6000 square feet (Where public sewer facilities are not available, not less than one acre is required.)

    “Minimum Lot Area | Minimum Lot Width | Minimum Front Yard | Minimum Side Yard | Minimum Rear Yard | Maximum Height (the lesser of) 6,000 square feet* | 50 feet | 20 feet | 6 feet | 20 feet | 2½ stories or 35 feet * Where public sewer facilities are not available, not less than one acre of lot area is required.”
    One more reviewed finding on this topic
    • Specified — Dwelling development in the AG Agricultural District.
      “Use | Minimum Lot Area | Minimum Lot Width | Minimum Front Yard | Minimum Side Yard | Minimum Rear Yard | Maximum Height (lesser of) Dwelling | 2 acres | 150 feet | 60 feet | 50 feet | 50 feet | 2½ stories or 35 feet”
  • SetbacksSpecified

    Single-family residential development in the RS Residential Single-Family District.

    front yard: >= 20 feet · side yard: >= 6 feet · rear yard: >= 20 feet

    “Minimum Lot Area | Minimum Lot Width | Minimum Front Yard | Minimum Side Yard | Minimum Rear Yard | Maximum Height (the lesser of) 6,000 square feet* | 50 feet | 20 feet | 6 feet | 20 feet | 2½ stories or 35 feet”
  • Building heightSpecified

    Dwelling development in the AG Agricultural District.

    • The maximum is the lesser of the two stated limits; farm buildings are excluded from the height limit for other uses, but the dwelling row is separately stated.

    maximum height: 2.5 stories or 35 feet (lesser of the two limits)

    “Dwelling | 2 acres | 150 feet | 60 feet | 50 feet | 50 feet | 2½ stories or 35 feet”
  • Building in a floodplainRequired

    Development in a designated flood plain inside Forest City city limits.

    • Floodway development requires certification before permit issuance that the development will result in no increase in the base 100-year flood elevation.
    • New or substantially improved residential structures must have the lowest floor, including basement, elevated at least 1.0 foot above base flood elevation.
    • New or substantially improved non-residential buildings must be elevated or floodproofed at least 1.0 foot above base flood elevation.
    • An as-built lowest-floor elevation certification by a registered engineer, architect, or land surveyor is required.

    minimum residential elevation above base flood elevation: >= 1 foot (new or substantially improved residential structure) · minimum non-residential elevation or floodproofing: >= 1 foot (new or substantially improved non-residential building)

    “makes application for a Permit to develop in a flood plain. [...] elevated at least 1.0 foot above the base flood elevation.”
  • Permit feesPublished

    City permit applications inside Forest City city limits.

    • A third application for the same project requires Council approval.
    • A Board of Adjustment application is required when a variance or special exception is needed.

    initial building permit fee: 35 USD ($50 to reapply if not substantially started within 180 days and completed within 18 months; third application $100 and Council approval) · Board of Adjustment application: 230 USD (variance or special exception) · building water service: 750 USD · residential/commercial sanitary sewer service: 50 USD (industrial permit is $100)

    “The initial fee for a building permit is $35”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Forest City or Winnebago County directly.

  • Owner-builder exemption — Owner-builders inside Forest City city limits.
  • Building code adopted — Building-code adoption inside Forest City city limits.
  • Inspections — Building inspections inside Forest City city limits.
  • Certificate of occupancy — Certificates of occupancy inside Forest City city limits.
  • Lot coverage — Lot coverage inside Forest City city limits.
14 more unanswered
  • Living in an RV
  • Camping on your land
  • Tiny homes
  • Accessory dwellings
  • Who permits septic
  • Septic permit
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Mandatory utility hookup
  • Agricultural exemption
  • Subdividing land
  • Driveway access
  • Short-term rentals

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.

Unanswered questions are usually a sign that Forest City publishes no rule on the point, not that none exists. Winnebago County’s page lists the county offices to call.

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