Unincorporated Greene County, Iowa has county zoning, but we could not confirm a general county building-permit requirement for an ordinary private home; ask Greene County Planning and Zoning what approval applies to the parcel and project12. Greene County Environmental Health administers septic-system permits, and the published permit fee is $15034.
At a glance
- Building permit
- General county requirement unconfirmed; ask Planning and Zoning before construction52
- Zoning
- Yes; county zoning applies in unincorporated Greene County16
- Septic permit
- Administered by Greene County Environmental Health; published fee is $15034
- Owner-builder
- Own-property work is exempt from state contractor registration, not from other approvals78
- RV living
- Long-term occupancy rule unconfirmed; ask Planning and Zoning about the parcel and duration2
- Tiny home
- Specific occupancy and minimum-size rules unconfirmed; ask Planning and Zoning2
- Setbacks
- Specified by zoning district, lot type, use and special regulations9
- Private well permit
- Environmental Health administers well-construction permits; published fee is $125410
Who to call
Building permits
Greene County Planning and Zoning
Zoning and floodplain-map questions for Greene County; contact this office to confirm project-specific land-use approvals
114 N. Chestnut Street, Jefferson, Ia. 50129
Septic permits
Greene County Environmental Health
Well-construction permits, septic-system permits and related environmental-health programs
114 N. Chestnut Street, Jefferson, Ia. 50129
Roads & driveways
Greene County Engineer’s Office
County-road, ditch and access questions, including confirming whether a proposed entrance needs county approval
114 N. Chestnut Street, Jefferson, IA 50129
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 Greene County, Iowa?
A general Greene County building-permit requirement for an ordinary private home could not be confirmed from the county material, so contact Greene County Planning and Zoning before starting work2. Iowa does not impose one universal building-permit requirement on every private building statewide; local governments administer permits and enforcement under applicable local law, while the state code reaches specified categories of construction11. State plan review and inspection apply to specified state-owned, state-board-of-regents and state-funded buildings, not automatically to every privately owned rural home12. A certificate of occupancy is likewise required only when an applicable ordinance calls for one, and no general Greene County requirement was confirmed132. The practical first step is to give Planning and Zoning the parcel location, proposed use and structure type and ask which zoning certificate, permit, inspection or closeout document applies2.
Who handles Greene County building and land-use questions?
Greene County does not identify a separate building department on the official county material reviewed, so start with Greene County Planning and Zoning for unincorporated-land questions at 515-386-5669 or [email protected]2. The office is in the Auditor’s Office on the second floor at 114 N. Chestnut Street, Jefferson, IA 501292. Greene County Environmental Health uses the same courthouse address and phone for well and septic permits; email [email protected]10. For questions about a proposed entrance, roadside ditch or county road, call the Greene County Engineer’s Office at 515-386-565014. The county page says Planning and Zoning keeps floodplain maps for reference, so include a floodplain-map check when discussing a prospective building site with that office2.
Does Greene County have zoning?
Yes. Greene County zoning applies to unincorporated Greene County, and the Board of Supervisors updated the zoning ordinance in 20226. Iowa gives counties optional zoning authority outside incorporated city limits and allows standards to differ by district15. Greene County setbacks vary by zoning district, lot type, use and special regulations, so a setback from one parcel should not be assumed to apply to another9. Iowa law generally makes county zoning inapplicable to qualifying agricultural land, farmhouses, farm barns, farm outbuildings and other structures primarily adapted to agricultural purposes while so used, although floodplain regulation can still apply15. If land will be divided, Greene County regulates subdivisions and resubdivisions in unincorporated areas, with a subdivision defined to include division into 3 or more lots or other divisions for ownership transfer or building development16.
How do septic and well permits work in Greene County?
Greene County Environmental Health administers septic-system and well-construction permits in cooperation with the local Board of Health310. The county publishes a $150 septic-system permit fee and a $125 well-construction permit fee4. Iowa requires county boards of health to regulate private water supplies and private sewage facilities within their jurisdiction, while the Iowa Department of Natural Resources retains concurrent authority and regulates direct discharges to state waters17. Only about 21.1% of Greene County soils are rated without severe limitations for a conventional septic drain field, so obtain site-specific feasibility work before fixing the house location or assuming a conventional system will fit18. Iowa generally requires an inspection before a qualifying transfer of a building served by a private sewage system; statutory exceptions apply, and an inspection is valid for 2 years19.
Can you live in an RV or tiny home in Greene County?
Greene County's rule for long-term or permanent RV occupancy on private land could not be confirmed, so ask Planning and Zoning about the parcel, zoning district, duration and utility plan before placing or occupying an RV2. A specific Greene County tiny-home occupancy rule and a general minimum dwelling size also could not be confirmed, so take the proposed dimensions, foundation and sanitation plan to Planning and Zoning2. A manufactured home has a clearer statewide rule: Greene County cannot reject a proposed residence solely because it is manufactured, but the home may be held to the same permanent-foundation, setback and minimum-square-footage standards as a site-built single-family home on the same lot20. Iowa counties must also allow at least 1 accessory dwelling unit on a single-family lot in a district where a single-family residence is allowed, subject to the statute’s size, building, deed and historic-property conditions21.
Building a home in Greene County: the steps, in order
- Call Greene County Planning and Zoning at 515-386-5669 with the parcel location, proposed use and structure type; ask which zoning approval, building permit, inspection and occupancy document apply2.
- Contact Greene County Environmental Health for septic feasibility and the $150 septic permit, and discuss a private well and its $125 permit if public water is unavailable104.
- Ask Planning and Zoning to review the county floodplain maps and explain any floodplain approval needed for the site2.
- Contact the County Engineer’s Office before creating or changing access from a county road, because the published county material does not confirm the permit rule for a new private entrance14.
- Before occupancy, confirm any required inspections or completion documents with Planning and Zoning because no general county requirement was confirmed2.
What should you check before buying land in Greene County?
Confirm the parcel’s zoning district, allowed use and setbacks with Greene County Planning and Zoning before closing692. Order septic feasibility work early because only about 21.1% of county soils are rated without severe limitations for a conventional drain field, even though about 97.6% of the county has a slope of 15% or less1822. Ask Planning and Zoning to review its floodplain maps, and verify legal and physical road access with the County Engineer’s Office214. If a split is contemplated, determine whether Greene County subdivision review applies before relying on a proposed lot layout16. For carrying costs, Greene County’s effective property-tax rate is about 1.2%, the median property-tax bill is about $1,682 per year, and a typical home-insurance premium is about $1,678 per year232425.
Watch-outs
- Greene County has zoning, but a general building-permit, building-inspection and certificate-of-occupancy requirement for ordinary private construction could not be confirmed; ask Planning and Zoning before work begins12.
- A state owner-builder exemption concerns contractor registration only and does not waive zoning, septic, building-code or inspection requirements that otherwise apply78.
- Greene County’s published zoning-fee schedule was not located, while its septic and well permit fees are published; ask Planning and Zoning for the current project-specific zoning cost42.
Sources
- Planning and Zoning - Greene County IA (2026 county census)
- Greene County Planning and Zoning (greenecounty.iowa.gov)
- Environmental Health - Greene County IA (2026 county census)
- Environmental Health - Greene County IA, quoted and re-checked
- Iowa Code 2026, Chapter 103A — State Building Code (2026 county census)
- Planning and Zoning - Greene County IA, quoted and re-checked
- Iowa Code 2026, Chapter 91C — Construction Contractors (2026 county census)
- Iowa Code 2026, Chapter 91C — Construction Contractors (Iowa statewide rule), quoted and re-checked
- GREENE COUNTY ZONING ORDINANCE, quoted and re-checked
- Greene County Environmental Health (greenecounty.iowa.gov)
- Iowa Code 2026, Chapter 103A — State Building Code (Iowa statewide rule), quoted and re-checked
- Iowa Code 2026, Chapter 103A — State Building Code (Iowa statewide rule), quoted and re-checked
- Iowa Code 2026, Chapter 103A — State Building Code (Iowa statewide rule), quoted and re-checked
- Greene County Engineer’s Office (greenecounty.iowa.gov)
- Iowa Code 2026, Chapter 335 — County Zoning (Iowa statewide rule), quoted and re-checked
- SUBDIVISION ORDINANCE, quoted and re-checked
- Iowa Code §455B.172, Jurisdiction of department and local boards (Iowa statewide rule), 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
- Senate File 2369 — Enrolled (Iowa statewide rule), 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 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.