Unincorporated Worth County, Iowa requires a building permit for new buildings, additions and accessory buildings, plus a zoning certificate before covered construction, moving or a change of use, subject to the agricultural exemption12. Worth County Planning and Zoning administers the county's countywide zoning, and incorporated cities may have separate municipal rules inside their limits34. Septic and well permits are obtained through the Worth County Sanitarian56.
At a glance
- Building permit
- Required for new buildings, additions, fences, decks, accessory buildings, remodeling projects and signs1
- Zoning
- Yes; Worth County applies county-administered zoning countywide37
- Septic permit
- Required for new systems and repairs or updates; obtained through the Worth County Sanitarian85
- RV living
- C-R permits commercial campgrounds and RV parks; ordinary private-lot occupancy is unconfirmed910
- Tiny home
- No specific rule confirmed; dwelling dimensions, foundation standards and zoning still apply11
- Owner-builder
- State contractor-registration exemption available for work on your own property, but it does not waive permits121
- Minimum home size
- Main-body width and length must each average at least 24 feet, subject to the ordinance exception11
- Wells
- Required through the Worth County Sanitarian; published fee is $75135
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 October 9, 2026.
Off-grid gear
Going off-grid in Worth County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Worth County, Iowa?
Yes. Unincorporated Worth County requires a permit for new buildings, additions, fences, decks, accessory buildings, remodeling projects and signs1. A zoning certificate is also required before covered construction, moving, structural alteration or a change of use, subject to the agricultural exemption2. The permit is valid for one year, and the application must include the fee and a site plan showing dimensions and setbacks1. 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 listed development in a river or stream floodplain14. Worth County also has a local building-code ordinance on its books, though we could not confirm that it adopted the Iowa state building code15. Iowa's owner-builder provision exempts work on your own property from contractor registration; it does not waive Worth County permits or zoning requirements121.
Who issues building, zoning, septic and floodplain permits in Worth County?
Worth County Planning and Zoning is the first stop because its administrative office checks proposed construction and uses for ordinance compliance10. The office is at 1000 Central Ave. in Northwood and can be reached at 602-206-473010. The county publishes building-permit and zoning-compliance forms, and completed forms go to the Planning and Zoning email shown on the county resources page16. A complete application includes the fee and a site plan showing dimensions and setbacks1. Depending on the project, Planning and Zoning may also require a conditional-use permit, variance, septic or well permit, or floodplain development permit17. A Flood Plain Development Permit comes from the County Flood Zone Administrator in the Engineer's Office, not from Planning and Zoning18. Septic and well permits stay with the Worth County Sanitarian, and a parcel inside a city should also be checked with that city's own rules54. Published fees cover zoning and related applications, but the planning-and-zoning schedule is dated 2012, so confirm the charge before paying19. We could not confirm a construction-inspection schedule or general occupancy-certificate rule; ask Planning and Zoning what closeout applies10.
Does Worth County have zoning?
Yes. Worth County applies county-administered zoning countywide and publishes district classifications and maps, which can be amended3720. Lot area varies by district and use: A-1 single-family or farm dwellings generally require 35 acres, reduced to 1.5 acres when the stated soil-rating condition is met21. R-1 single-family dwellings have minimum front and rear yards of 30 feet and side yards of 10 feet, with different rules for other structures and corner lots22. Height is also district-specific: the R-1 single-family limit is 2.5 stories or 35 feet, whichever is lower, while the R-2 limit is 3 stories or 45 feet, whichever is lower23. In an Agricultural district, a secondary farm dwelling may house qualifying family members if the principal dwelling stays occupied and the accessory dwelling is a permanent structure within 250 feet that cannot be sold separately24. Ask Planning and Zoning to verify the parcel's current district and standards10.
How do septic and well permits work in Worth County?
Worth County requires a permit for new septic systems and repairs or updates, with permits obtained through the Worth County Sanitarian58. The published septic fee is $200, and every new well requires a permit with a published $75 fee2513. Call the Sanitarian at 319-830-1276 before fixing the house location26. Only about 3.8% of Worth County soils are rated without severe limits for a conventional drain field, so site evaluation can affect system design and cost27. A septic system may not discharge into a ditch, field tile, creek or similar outlet and must use secondary treatment such as a soil absorption field28. Iowa requires a certified inspection before most qualifying transfers of a private system serving one through four dwelling units, subject to exceptions29.
Can you live in an RV or tiny home in Worth County?
Worth County expressly permits commercial campgrounds and recreational vehicle parks in the C-R district, but that does not establish a right to live long term in an RV on an ordinary private lot9. Ask Planning and Zoning about the parcel, duration and utility plan before relying on an RV10. A tiny home is not automatically exempt: new dwellings generally need a permanent foundation and an average main-body width and length of at least 24 feet11. Manufactured housing is also limited: the R-MH district is for manufactured housing parks, while a farm may have a mobile home as its principal dwelling and may allow one additional mobile home for an immediate-family occupant engaged in the farm operation30. A special-use permit may allow temporary living quarters while the principal dwelling is built30. Worth County has not confirmed a general rule for private residential RV occupancy or a tiny-home-specific occupancy rule; ask Planning and Zoning before buying or placing either10.
Building a home in Worth County: the steps, in order
- Ask Worth County Planning and Zoning to verify the parcel's district, allowed use and current map2010.
- Confirm the applicable lot, setback, dwelling-dimension and height rules before final plans21221131.
- If dividing land, discuss platting and access early; Worth County regulates subdivisions and reviews subdivision plats3233.
- Have the Worth County Sanitarian address septic and well permits before fixing the building site346.
- Prepare the site plan and submit the zoning-certificate or building-permit application with the appropriate fee171.
- Ask whether the floodplain ordinance or a DNR floodplain permit applies if the site is in a river or stream floodplain35.
- Confirm street frontage or an approved access easement and make sure the driveway meets county policy3637.
What should you check before buying land in Worth County?
Start with zoning, access, septic feasibility, water and floodplain status. Worth County's district-specific lot, setback and height rules can determine whether the intended house fits382223. Ask whether the purchase depends on a land division because Worth County regulates subdivision platting and related access33. A residential lot generally needs at least 50 feet of street frontage or an exclusive private easement at least 20 feet wide, and a shared easement for two single-family dwellings must be at least 24 feet wide37. 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 less2739. Floodplain controls still apply to listed development that otherwise might claim an agricultural exemption3514. 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 $1,592404142.
Watch-outs
- The agricultural exemption is conditional and does not cover listed development in river or stream floodplains14.
- Worth County's published planning-and-zoning fee schedule is dated 2012, so confirm current charges before submitting an application1910.
- C-R zoning permits commercial campgrounds and RV parks, but the county has not confirmed general residential RV occupancy on an ordinary private lot910.
Sources
- Worth County Application for Zoning Certificate (Building Permit), quoted and re-checked
- Worth County Planning and Zoning 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
- Planning and Zoning Department - Worth County, Iowa, quoted and re-checked
- Planning and Zoning Department - Worth County, Iowa, 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
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Worth County Planning and Zoning (worthcountyiowa.gov)
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
- Financial Incentives - Environmental Health - Worth County, quoted and re-checked
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- February 26, 2007 Board of Supervisors Minutes, quoted and re-checked
- Forms and Resources - Planning and Zoning - Worth County, IA, quoted and re-checked
- Forms and Resources - Planning and Zoning - Worth County, IA, quoted and re-checked
- Aid to Zoning Questions, quoted and re-checked
- Worth County Planning and Zoning Fee Structure, quoted and re-checked
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Worth County Zoning Ordinance, quoted and re-checked
- Worth County Zoning Ordinance, quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Financial Incentives - Environmental Health - Worth County, quoted and re-checked
- Worth County Sanitarian (worthcountyiowa.gov)
- 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
- Wells & Septic Systems - Environmental Health - Worth County, quoted and re-checked
- Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance (as of June 22, 2026), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Worth County Zoning Ordinance, quoted and re-checked
- Planning and Zoning Department - Worth County, Iowa, quoted and re-checked
- Worth County Application for Zoning Certificate (Building Permit), quoted and re-checked
- Worth County, Iowa, Zoning Ordinance, quoted and re-checked
- Worth County Zoning Ordinance, quoted and re-checked
- Worth County Zoning Ordinance, quoted and re-checked
- Share of land at 15% slope or less: 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 October 9, 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.