Unincorporated Worth County, Iowa requires a county building permit for new buildings, additions, fences, decks, accessory buildings, remodeling projects and signs1. Worth County also applies zoning countywide, while incorporated municipalities may have their own rules2. Septic and well permits are obtained through the Worth County Sanitarian3.
At a glance
- Building permit
- Required for new buildings, additions, fences, decks, accessory buildings, remodeling projects and signs1
- Zoning
- Yes; Worth County applies zoning countywide, with separate municipal rules possible inside cities2
- Septic permit
- Required for new systems and repairs or updates; administered by the Worth County Sanitarian43
- RV living
- Long-term private-land occupancy could not be confirmed; ask Planning and Zoning5
- Tiny home
- No specific tiny-home rule confirmed; county dwelling dimensions and zoning still apply65
- Owner-builder
- State contractor-registration exemption available for work on your own property, but it does not waive permits71
- Minimum home size
- Main-body width and length must each average at least 24 feet, subject to the ordinance exception6
- Wells
- A permit is required through the Worth County Sanitarian8
Who to call
Building permits
Worth County Planning and Zoning
Zoning administration and review of proposed construction, reconstruction, alterations, uses and changes of use
1000 Central Ave. Northwood, IA 50459
Septic permits
Septic-system and private-well permits in Worth County
Roads & driveways
Worth County Engineer's Office and Secondary Roads
County secondary roads and road-access applications
1000 Central Ave. Northwood, IA 50459
Contact details are copied from each office’s official page and were checked against it on September 27, 2026.
Do you need a building permit in Worth County, Iowa?
Yes. Unincorporated Worth County requires a zoning certificate or building permit for new buildings, additions, fences, decks, sheds and accessory buildings, remodeling projects and signs1. The application must include the appropriate fee and a site plan showing dimensions and setbacks, and an issued permit remains valid for one year1. Agricultural land, farmsteads, farmhouses, barns, outbuildings and other structures primarily adapted to agricultural purposes may qualify for an exemption while used that way, but the owner must demonstrate agricultural use and the exemption does not cover development in a river or stream floodplain9. Iowa's owner-builder provision is narrower than it sounds: work on your own property is exempt from contractor registration, not from Worth County's permit, zoning or inspection requirements71.
Who issues permits in Worth County, and how do you reach them?
Worth County Planning and Zoning is the first stop for a project in the county zoning jurisdiction because its administrative office checks proposed construction and uses for ordinance compliance5. The office is at 1000 Central Ave. in Northwood and can be reached at 602-206-4730; call for an appointment5. Completed zoning-certificate and building-permit forms go to the Planning and Zoning office, and the application process may also call for septic or well approval, a floodplain permit, a conditional-use permit or a variance depending on the site and project10. The county publishes zoning and related application fees, but its schedule is dated 2012, so confirm the current charge with Planning and Zoning before submitting payment11. Worth County has not published a separate construction-inspection schedule or a general certificate-of-occupancy requirement in the reviewed material; ask Planning and Zoning what inspections and closeout documents apply to your project5.
Does Worth County have zoning?
Yes. Worth County extended zoning countywide in 2022, and its ordinance divides the unincorporated county into mapped zoning districts; incorporated municipalities may administer separate municipal rules212. The parcel's district matters because minimum lot area varies sharply: an agricultural-district dwelling generally requires 35 acres, with a 1.5-acre exception tied to the stated soil-rating condition, while the residential-district examples are 20,000 square feet and 8,000 square feet13. New dwellings also generally need an average main-body width and length of at least 24 feet, subject to the ordinance's stated exception6. Agricultural exemptions are conditional, not automatic, and they do not apply to listed development in river or stream floodplains9. Check the official zoning map and proposed use with Planning and Zoning before treating a parcel as buildable145.
How do septic and well permits work in Worth County?
Worth County requires a septic permit for new construction and for repairs or updates, with the Worth County Sanitarian administering the process43. The county's environmental-health page lists a $200 septic permit and a $75 permit for every new well8. Call the Worth County Sanitarian at 319-830-1276 before finalizing a house location or construction schedule8. Soil feasibility deserves early attention: only about 3.8% of Worth County soils are rated without severe limits for a conventional septic drain field, so a site evaluation may materially affect system design and cost15. Iowa also requires a certified septic inspection before most ownership transfers involving a private system serving one through four dwelling units; the inspection is valid for two years, subject to statutory exceptions16. Worth County's reviewed materials do not confirm a separate routine county inspection schedule beyond the statewide transfer rule, so ask the Sanitarian what inspections the permit requires8.
Can you live in an RV or tiny home in Worth County?
Worth County's reviewed ordinance does not confirm a general rule allowing long-term RV occupancy or temporary camping on private land, so ask Planning and Zoning about the parcel, duration and utility plan before buying5. A tiny home is not automatically exempt from the county's dwelling rules: new dwellings generally must have an average main-body width and length of at least 24 feet, subject to the ordinance exception, and lot size varies by zoning district613. Manufactured homes have separate protections under Iowa law, but placement must meet the standards that apply to a site-built house on the same lot, including permanent-foundation, setback and minimum-size standards17. Worth County also allows limited manufactured-home arrangements, including a farm's principal dwelling and temporary living quarters during construction through a special-use permit18. Those provisions do not establish a blanket right to occupy an RV or a tiny home on any parcel185.
Building a home in Worth County: the steps, in order
- Ask Worth County Planning and Zoning to identify the parcel's district, permitted use, dimensional standards and any need for a variance or conditional-use approval145.
- Confirm the lot-area rule and the dwelling's minimum dimensions before commissioning final plans136.
- Have the Worth County Sanitarian evaluate septic and well permitting early, especially because most mapped soils carry severe limits for a conventional drain field315.
- Prepare the building-permit application with the required fee and a site plan showing dimensions and setbacks1.
- Ask Planning and Zoning whether floodplain approval, inspections or other project-specific reviews apply195.
- If the driveway reaches a county road, coordinate a road-access application with the Engineer's Office; county zoning requires driveways to meet the Worth County driveway policy2021.
- Do not start work until the applicable approvals are issued1.
What should you check before buying land in Worth County?
Start with zoning, legal access, septic feasibility, water and floodplain status. Worth County's mapped districts and lot rules can determine whether a rural parcel supports the intended house, while every public or private driveway must meet the county driveway policy141320. Only about 3.8% of soils are rated without severe limits for a conventional septic drain field, although about 99.5% of county land has a slope of 15% or less1522. Floodplain approval may be part of the building-permit review, and the agricultural exemption does not remove floodplain controls199. Worth County has about 7,297 residents at roughly 18.2 people per square mile, and the nearest city of 100,000 or more is about 59 straight-line miles from the county center232425. For carrying costs, the effective property-tax rate is about 1.1%, the median annual property-tax bill is about $1,530 and a typical annual home-insurance premium is about $1,592262728.
Watch-outs
- The agricultural exemption is conditional and does not cover listed development in river or stream floodplains9.
- Worth County's published planning-and-zoning fee schedule is dated 2012, so confirm current charges before submitting an application115.
- The county has not confirmed a general private-land RV occupancy rule; ask Planning and Zoning before relying on an RV during or after construction5.
Sources
- Worth County Application for Zoning Certificate (Building Permit), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Planning and Zoning Department - Worth County, Iowa, quoted and re-checked
- Financial Incentives - Environmental Health - Worth County, quoted and re-checked
- Worth County Planning and Zoning (worthcountyiowa.gov)
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
- Worth County Sanitarian (worthcountyiowa.gov)
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Forms and Resources - Planning and Zoning - Worth County, IA, quoted and re-checked
- Worth County Planning and Zoning Fee Structure, quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), quoted and re-checked
- Iowa Code §335.30, Manufactured and modular homes (Iowa statewide rule), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Worth County Application for Zoning Certificate (Building Permit), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Worth County Engineer's Office and Secondary Roads (worthcountyiowa.gov)
- Share of land at 15% slope or less: Bolthole Index county data
- County population: Bolthole Index county data
- Population density: Bolthole Index county data
- Distance to the nearest metro area: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
Written September 27, 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.