Platte County, Nebraska confirms that development in a mapped floodplain needs county review, but we could not confirm a general building-permit rule for an ordinary rural home outside a floodplain12. Unincorporated land outside municipal jurisdiction has no county zoning requirements3. Septic systems follow Nebraska's statewide onsite wastewater program4.
At a glance
- Building permit
- Confirmed for mapped floodplain development; general rural-home rule unconfirmed12
- Zoning
- None outside the 2-mile jurisdiction of Columbus or 1-mile jurisdiction of a village/2nd-class city53
- Septic permits
- State-administered by Nebraska DWEE; most systems need no construction permit under Authorization by Rule46
- Floodplain permit
- Required for development in Platte County's mapped floodplain, which covers over 19% of the county78
- Driveway/approach permit
- Required from the County Highway Superintendent before building an approach road onto a county road9
- Well permit (Central Platte NRD)
- Required before drilling any well over 50 gpm or any replacement well, $50 fee10
- Subdivision plat
- County review required, but the county has no power to regulate a subdivision where the smallest resulting parcel is over 10 acres1112
- Owner-builder exemption
- A person working on their own property isn't a 'contractor' under Nebraska's Contractor Registration Act13
Who to call
Floodplain permits
Platte County Floodplain Administrator
Floodplain Development Permit applications for the roughly 85,437 acres (over 19% of the county) that lie in mapped floodplain; housed within the Highway Department
Highway Department, 2610 14th Street, Columbus, NE 68601
Roads & driveways
Platte County Highway Department
Approach-road (driveway and culvert) permits for construction on the public right-of-way of a county road; also administers the Floodplain Administrator function
2610 14th Street, Columbus, NE 68601
Also useful
Receives the final plat for subdivision review before it goes to the Subdivision Review Committee and Board of Supervisors; general county records contact
2610 14th Street, Columbus, NE 68601
Also useful
Nebraska Department of Water, Energy, and Environment (DWEE)
Statewide onsite wastewater (septic) system registration, Authorization by Rule, and permitting for systems that don't qualify for Authorization by Rule
245 Fallbrook Blvd, Suite 100, Lincoln, NE 68521
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 Platte County, Nebraska?
Platte County clearly requires review for development in a designated floodplain or floodway, where the Floodplain Administrator reviews applications and may grant a permit after federal requirements are met28. The county's published material does not establish whether an ordinary rural home outside those areas needs a general building permit, so ask the County Clerk before ordering plans or starting work. Flood exposure deserves an early check because more than 19% of Platte County, or 85,437 acres, lies in mapped floodplain8. Nebraska has adopted the 2018 International Building Code and International Residential Code with listed amendments and exclusions14. State law also contains a conditional farm-purpose exception where a local government has not adopted a code after a state-code update15.
Who handles floodplain, road and subdivision permits in Platte County?
For land in a mapped floodplain, the Floodplain Administrator, housed within the Highway Department at the county courthouse, reviews development applications8. For a driveway or approach road onto a county road, the Highway Department issues the required permit and determines drainage or utility-structure needs; crossing a hard-surfaced county road must be done by boring169. For a land division or subdivision plat, the process starts with a pre-preliminary meeting with the Subdivision Review Committee, and the final plat goes to the County Clerk before the Board of Supervisors approves it1711. For septic systems, there's no county office at all: Nebraska DWEE administers onsite wastewater statewide184.
Does Platte County have zoning?
Platte County states plainly on its own website that it is not zoned3. That means no countywide zoning requirements apply, unless your property sits within the 2-mile extraterritorial jurisdiction of Columbus, a first-class city, or within the 1-mile jurisdiction of a village or second-class city, in which case you'd contact that city or village directly rather than the county19. Because there's no county zoning, there's no county-set minimum dwelling size, minimum lot size, lot coverage limit, or building-height limit for land outside those municipal jurisdictions20212223. One county rule still reaches unincorporated land regardless of zoning status: subdivided lots must meet building setbacks of 20 feet from a county or private road right-of-way, and 10 feet on side and rear lot lines24. Nebraska law does let a county board adopt zoning by resolution for its unincorporated territory, covering things like building height, lot coverage, and land uses, but Platte County simply hasn't exercised that authority25.
How do septic permits work in Platte County?
Onsite wastewater systems in Platte County follow Nebraska's statewide Title 124 rules, administered by DWEE rather than a county health department426. Most systems qualify for 'Authorization by Rule' and don't need a state construction permit at all; a permit is only required when wastewater quantity, quality, or site conditions fall outside what Authorization by Rule covers6. Soils here are moderate: 37.1% of Platte County's land is free of severe limitations for a conventional drain field, so plan on a site evaluation but don't assume the worst27. Only a certified professional, professional engineer, or registered environmental health specialist may inspect a system's installation, equipment, or operation28. If you're subdividing land and lots under 3 acres will use individual wells and septic systems, NDEE (now DWEE) approval is required as part of the subdivision process11.
Can you live in an RV or tiny home on your land in Platte County?
We could not confirm a Platte County rule that expressly allows or prohibits long-term RV living, temporary camping, tiny-home occupancy, manufactured-home occupancy, or accessory dwellings on private rural land. Platte County's lack of county zoning outside municipal jurisdiction answers county land-use zoning questions, but it is not by itself permission to occupy every type of structure3. Ask the County Clerk and DWEE what applies to the proposed dwelling and wastewater setup before moving onto the parcel. Nebraska separately prohibits camping on state or county highways, roadside areas, and parks outside designated campsites; that public-property rule does not answer private-land occupancy29. Inside Columbus or another municipality's jurisdiction, contact that city or village because its rules may differ19.
Building a home in Platte County: the steps, in order
- Ask the County Clerk whether the proposed home needs a general building permit, because the published county material confirms floodplain permitting but does not resolve ordinary construction elsewhere1.
- Check whether the parcel is in a mapped floodplain and obtain the Floodplain Development Permit before development in a special flood hazard area87.
- Confirm whether the land falls within Columbus's 2-mile jurisdiction or a village or second-class city's 1-mile jurisdiction; contact that municipality if it does19.
- Have a qualified professional evaluate the septic site and ask DWEE whether Authorization by Rule applies or a construction permit is needed186.
- Get the required Central Platte NRD approval before drilling a replacement well or a well pumping over 50 gallons per minute10.
- Apply to the Highway Department before constructing an approach across county-road right-of-way169.
- Arrange state electrical inspection when a new single-family installation includes new service equipment30.
What to check before you buy land in Platte County
Check FEMA and county floodplain maps before you buy, since floodplain covers more than 19% of the county's total acreage and is the one place a county building permit is required8. Septic soils are moderate here, with 37.1% of the county's land free of severe drain-field limitations, better than many rural counties but still worth a site evaluation27. Confirm whether the parcel sits inside a municipal extraterritorial jurisdiction (2 miles of Columbus, 1 mile of a village or second-class city), since that changes who sets zoning and building rules19. If the tract was recently split off a larger parcel, note that the county has no power to regulate a subdivision where the smallest resulting lot is over 10 acres, so a large-acreage split may bypass county subdivision review entirely12. The land is gentle and largely open, with 97.9% at 15% slope or less and only 3.8% forested3132. Property taxes run moderate-to-high for the region: an effective rate near 1.3%, a median bill around $2,789 a year, against a typical home value of about $283,795333435.
Watch-outs
- Floodplain covers more than 19% of Platte County; don't assume 'no zoning' means 'no permit' until you've checked with the Floodplain Administrator87.
- We could not confirm Platte County rules for RV, tiny-home or manufactured-home occupancy on ordinary rural land; ask the County Clerk before relying on the county's no-zoning statement5.
- A large-lot subdivision (every resulting parcel over 10 acres) falls outside the county's subdivision-regulation power under state law, which can affect road and utility access; confirm the parcel's history before you buy12.
Sources
- Planning & Zoning - Platte County Nebraska (2026 county census)
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Nebraska DEE - Onsite Wastewater (2026 county census)
- Planning & Zoning - Platte County Nebraska (2026 county census)
- Permits, quoted and re-checked
- Floodplain Administrator - Platte County Nebraska, quoted and re-checked
- Platte County Floodplain Administrator (plattecounty.ne.gov)
- Permit to Construct Approach Road on Platte County Right-of-Way, quoted and re-checked
- Well Drilling Permits & Regulations, quoted and re-checked
- Platte County Subdivision Requirements, quoted and re-checked
- Nebraska Revised Statute 23-174.03 (Nebraska statewide rule), quoted and re-checked
- Nebraska Revised Statute 48-2104 — Registration required (2026 county census)
- Nebraska Revised Statute 71-6403, quoted and re-checked
- Nebraska Revised Statute 71-6406, quoted and re-checked
- Platte County Highway Department (plattecounty.ne.gov)
- Platte County Clerk (plattecounty.ne.gov)
- Nebraska Department of Water, Energy, and Environment (DWEE) (dwee.nebraska.gov)
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Planning & Zoning - Platte County Nebraska, quoted and re-checked
- Platte County Subdivision Requirements, quoted and re-checked
- Nebraska Revised Statute 23-114 (Nebraska statewide rule), quoted and re-checked
- Onsite Wastewater Program, quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Just for Homeowners, quoted and re-checked
- Nebraska Revised Statute 39-312 — Camping; permitted; where; violation; penalty (Nebraska statewide rule), quoted and re-checked
- State Electrical Act, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home value (Zillow): 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.