Henry County records indicate no countywide building-code or residential building-permit program, but the county's current permit requirement could not be independently confirmed; ask the County Commission and the applicable township before building12. Windsor, Bogard and White Oak townships each have their own planning-and-zoning contacts3. Septic systems not connected to an incorporated municipality's sewer require a Henry County Health Center permit45.
At a glance
- Building permit
- County records indicate none countywide; confirm with the County Commission and your township12
- Township zoning
- Windsor, Bogard and White Oak townships each publish a planning-and-zoning contact3
- Septic permit
- Required through the Henry County Health Center unless connected to an incorporated municipality's sewer45
- Septic fees
- $200 for a single-family system, $300 for a non-single-family system and $100 for a repair permit5
- Minimum septic area
- At least 10,000 square feet of suitable sewage-disposal land, as determined by the County Health Officer6
- RV or tiny home
- Countywide private-land rules could not be confirmed; ask the applicable township3
- Floodplain development
- A floodplain development permit is required for development in a Missouri floodplain7
- Private well
- Contractor work requires Missouri permits; a landowner may install their own well or pump without one8
Who to call
Septic permits
Wastewater treatment system permits and inspections for Henry County
111 North Third Street, Clinton, MO 64735
Floodplain permits
Henry County Floodplain Administrator
Floodplain questions and development permitting for Henry County
100 W Franklin Street, Clinton, MO 64735
Contact details are copied from each office’s official page and were checked against it on September 28, 2026.
Do you need a building permit in Henry County, Missouri?
Available Henry County records say a residential building permit is not required and that the county has no countywide building-code or permit program1. The current county pages reviewed, however, do not expressly confirm whether Henry County has adopted a building code or currently requires a residential building permit. Missouri leaves fire and building-code adoption to local governments, and the state framework permits qualifying counties to adopt codes under specified procedures29. Before ordering plans or starting work, ask the Henry County Commission and the planning-and-zoning contact for the parcel's township for a current written answer. A building-permit answer does not settle the separate permits: onsite wastewater work requires the Health Center's approval, development in a floodplain requires a floodplain permit, and a driveway in MoDOT right-of-way requires a state permit5710.
Who handles Henry County building and land permits, and how do you reach them?
Henry County does not publish a single building-and-zoning office for every rural parcel. The county's official information page instead directs planning-and-zoning questions to separate contacts for Windsor, Bogard and White Oak townships3. Ask the Henry County Commission which township and incorporated jurisdiction covers the parcel, then obtain the applicable township contact before relying on a permit answer. For onsite wastewater, call the Henry County Health Center at (660) 885-8193 or visit 111 North Third Street, Clinton, MO 6473511. For land in a mapped flood hazard area, contact the Henry County Floodplain Administrator at (660) 383-1061 or 100 W Franklin Street, Clinton, MO 6473512. These offices cover different subjects: the Health Center handles wastewater systems, while the floodplain administrator handles floodplain questions and development permitting1112.
Does Henry County have zoning?
Available Henry County records say there is no countywide zoning ordinance, but the official materials reviewed do not expressly establish whether the county adopted countywide zoning through Missouri's referendum process1314. What is confirmed is that Windsor, Bogard and White Oak townships each have their own planning-and-zoning contact, while the county page does not publish their ordinance text, maps, boundaries, fees or substantive standards3151617. That makes parcel location decisive. Ask the relevant township about allowed uses, setbacks, dwelling size, building height, lot coverage, RVs, manufactured homes and subdivision review before buying. Missouri law also creates a township subdivision-review framework when a township planning commission has adopted and filed the required planning material, but the record here does not establish that every Henry County parcel is subject to that process18.
How do septic permits work in Henry County?
A person must obtain a Henry County Health Center permit before constructing, installing or modifying a wastewater treatment system, unless the system is connected to sewer operated by or for an incorporated municipality45. The local fees are $200 for a single-family system, $300 for a non-single-family system and $100 for a repair permit; the fees are non-refundable5. Henry County requires at least 10,000 square feet of suitable land for sewage disposal6. For new septic construction on property under 10 acres, the regulation calls for a state-registered engineer unless a soil scientist establishes acceptable soil conditions and permeability and the installer can design a system meeting setbacks6. Only 0.3% of county soils are rated without severe limitations for a conventional drain field, so make the site and soil evaluation an early purchase contingency19. The permittee must arrange inspection and approval before backfilling; missing the final inspection can bring a $250 charge and may require exposing the system again20.
Can you live in an RV or tiny home on your land in Henry County?
We could not confirm a countywide Henry County rule allowing or prohibiting long-term RV living, temporary camping or tiny-home occupancy on private rural land. Ask the planning-and-zoning contact for the parcel's township and, if the parcel is inside a city, that city's planning office. Do not treat the absence of a published countywide rule as permission. The specific RV rule in the record applies only to a licensed RV park or campground in the City of Windsor: an RV must occupy an approved designated space, may stay no more than 180 days in any consecutive 12-month period and may not serve as a permanent residence21. Windsor also requires mobile homes to be placed in a mobile-home park, but that municipal rule does not answer what is allowed elsewhere in Henry County22. Any occupied off-grid structure still needs a lawful wastewater solution; Henry County requires the wastewater application, permit, registration and plan requirements for regulated onsite systems23.
Building a home in Henry County: the steps, in order
- Confirm the parcel's township and whether it lies inside a municipality, then ask the applicable planning office for the current building-permit, zoning, setback and occupancy rules3.
- Check the flood map and contact the Henry County Floodplain Administrator before grading or building in a floodplain; Missouri requires a permit for all floodplain development127.
- Evaluate the septic site before finalizing the house location, because only 0.3% of county soils are rated without severe conventional-drain-field limits19.
- Apply to the Henry County Health Center before installing or modifying the wastewater system and arrange inspection before backfilling11520.
- If the driveway enters MoDOT right-of-way, obtain the state right-of-way permit before constructing or changing it10.
- Keep written approvals, plans and permit conditions with the project; the Health Center permit must be posted at the septic job site5.
What should you check before buying land in Henry County?
Make a septic site evaluation the first technical contingency: only 0.3% of Henry County soils are rated without severe limitations for a conventional drain field19. Terrain is generally easier, with 92.5% of the county at a slope of 15% or less24. Verify township and city boundaries, because Windsor, Bogard and White Oak townships publish separate planning-and-zoning contacts and city rules cannot be generalized to rural land3. Check the flood map and legal access, and identify whether a proposed entrance meets a county road or MoDOT right-of-way; MoDOT requires a permit for driveway construction or modification in its right-of-way10. For water, Missouri generally requires permits for contractor-installed wells and pumps, although a landowner may install their own well or pump without a permit while still following the remaining state rules8. The typical effective property-tax rate is about 0.8%, and the median annual property-tax bill is about $1,2302526.
Watch-outs
- Available Henry County records say no county building permit is required, but current county adoption and permit requirements could not be independently confirmed; get a written answer from the County Commission and the applicable township before building12.
- Only 0.3% of Henry County soils are rated without severe limits for a conventional drain field, so do not buy based only on acreage or an assumed septic location19.
- The City of Windsor's 180-day RV-park limit is a city rule for licensed parks, not an answer for private rural land elsewhere in Henry County21.
Sources
- Henry County, Missouri - Information (Planning & Zoning) (2026 county census)
- RSMo Section 64.170 (Missouri statewide rule), quoted and re-checked
- Information | Henry County, Missouri, quoted and re-checked
- Henry County Wastewater Treatment Systems Regulation No. 89-1, quoted and re-checked
- Henry County Wastewater Treatment Systems Regulation No. 89-1, quoted and re-checked
- Henry County Health Center Regulation No. 89-1, Wastewater Treatment Systems Regulation, quoted and re-checked
- Floodplain Forms, quoted and re-checked
- Water Wells - PUB2945, quoted and re-checked
- RSMo § 64.170 — County commissions control construction and issue building permits (Missouri statewide rule), quoted and re-checked
- Permits | Missouri Department of Transportation, quoted and re-checked
- Henry County Health Center (henrycohealth.org)
- Henry County Floodplain Administrator (sema.dps.mo.gov)
- Henry County, Missouri - Information (Planning & Zoning) (2026 county census)
- RSMo § 64.090 — Planning and zoning powers of county commission (Missouri statewide rule), quoted and re-checked
- Information | Henry County, Missouri, quoted and re-checked
- Information | Henry County, Missouri, quoted and re-checked
- Information | Henry County, Missouri, quoted and re-checked
- RSMo Section 65.670 — Subdivision plats, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Henry County Wastewater Treatment Systems Regulation No. 89-1, quoted and re-checked
- City of Windsor Ordinances, RV Parks and Campground Regulations, quoted and re-checked
- City of Windsor Ordinances 4 — Chapter 400 Zoning Regulations, quoted and re-checked
- Henry County Wastewater Treatment Systems Regulation No. 89-1, 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
Written September 28, 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.