Building permits, zoning and land rules in Platte County, Nebraska

Platte County requires a floodplain development permit for work in a designated floodplain or floodway; the Floodplain Administrator may approve it after the applicable federal requirements are met¹. We could not confirm whether an ordinary rural home outside those areas needs a general building permit, so ask the County Clerk before ordering plans or starting work^1,10. Inside a city or village jurisdiction, ask that municipality about its building permit and zoning approval; Nebraska DWEE still administers septic permits statewide^2,3. Nebraska has adopted the 2018 International Building Code and International Residential Code with listed amendments and exclusions¹¹. If a local government has not adopted an authorized code within two years after a state-code update, the state code applies but exempts construction on a farm or for farm purposes; that exemption does not settle electrical, plumbing, septic, floodplain or municipal requirements¹². An owner may perform qualifying electrical work on the owner's principal single-family residence or farm property without a state electrical license, but applicable inspections remain⁹.

Platte County's general building-permit requirement for ordinary rural construction remains unconfirmed; start with the County Clerk, and ask the city or village about building permits within municipal jurisdiction^1,10. For mapped floodplain development, contact the Floodplain Administrator in the Highway Department¹. County-road driveway permits come from the County Highway Superintendent through the Highway Department and cover new approaches, relocation, changes of use, alteration, paving and widening⁶. Provide the legal description and mark the proposed location with two flags; county staff inspect the site and specify drainage requirements⁶. Each no-fee permit covers one access location, with review taking approximately 10 working days, weather permitting; that is not a guaranteed deadline⁶. Required drainage installation and other owner work remain at the owner's expense; notify the Highway Department after completion for final inspection and approval⁶. Nebraska DWEE administers septic permits separately¹³.

Platte County has no county zoning districts or zoning approval in unincorporated areas outside the specified municipal extraterritorial jurisdictions². A property within the 2-mile jurisdiction of Columbus or the 1-mile jurisdiction of a village or second-class city instead requires confirmation with that municipality for zoning approval and any municipal building permit; Nebraska DWEE remains the septic-permit authority^2,3. Columbus sets its own zoning inside city limits, as does Newman Grove, a city mainly in Madison County that reaches into Platte County; DWEE administers the statewide septic program, subject to additional local requirements^13,14,15. Outside those jurisdictions, Platte County sets no zoning minimum for dwelling or lot size and no zoning limit for lot coverage or building height². County subdivision rules still set setbacks for lots subject to subdivision review: 20 feet from county or private road rights-of-way and 10 feet from side and rear lot lines⁸. Floodplain development remains subject to a separate county permit even where county zoning approval is absent^1,2.

Onsite wastewater systems in Platte County follow Nebraska's statewide Title 124 rules, administered by DWEE rather than a county health department^3,13. A wastewater-generating home may use a Title 124-compliant onsite system instead of connecting to a public sewer or other wastewater works, so off-grid sanitation is possible when the onsite design complies; separate local requirements may still apply^13,16. Most systems qualify for Authorization by Rule without a state construction permit, while systems outside its wastewater or site conditions need a permit⁴. USDA rates 37.1% of Platte County soils "not limited" for conventional septic drain fields; other ratings do not make septic impossible, but make a parcel-specific evaluation essential¹⁷. Inspection work is restricted to certified or otherwise qualified professionals¹⁸. Subdivisions using individual wells and septic on lots under 3 acres need state environmental approval⁸.

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; ask the County Clerk before planning occupancy^2,10. Platte County's lack of county zoning outside specified municipal jurisdictions answers county land-use zoning questions, but it is not by itself permission to occupy every type of structure². Ask the County Clerk about occupancy and any building permit, and ask DWEE about the septic permit or Authorization by Rule before moving onto the parcel^3,4. 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 occupancy¹⁹. Inside Columbus or another municipality's jurisdiction, ask that city or village about zoning approval and building permits; DWEE remains responsible for the statewide septic program^2,3.

1. Ask the County Clerk whether the proposed home needs a general building permit, because the county confirms floodplain permitting but does not resolve ordinary construction elsewhere¹.
2. Ask the Floodplain Administrator to check the parcel maps and obtain a floodplain development permit before work in a floodplain or floodway¹.
3. Confirm whether the land falls within Columbus's 2-mile jurisdiction or a village or second-class city's 1-mile jurisdiction; if it does, ask that municipality about its building permit and zoning approval².
4. Have a qualified professional evaluate the septic site and ask DWEE whether Authorization by Rule applies or a septic construction permit is needed^4,20.
5. For property within Central Platte NRD, get the required district well permit before drilling a replacement well or a well pumping over 50 gallons per minute⁷.
6. For county-road access, give the Highway Department the legal description, mark the proposed location with two flags and obtain the no-fee driveway permit before construction^6,21,22. Notify the Highway Department after driveway construction for final inspection and approval⁶.
7. Arrange state electrical inspection when a new single-family installation includes new service equipment, unless a qualifying local inspection program applies, even if the owner performs qualifying electrical work⁹.
8. If the building is subject to State Fire Marshal occupancy regulation, request the final inspection and Certificate of Occupancy before use²³.

Check county, state or FEMA floodplain maps before you buy, since floodplain covers more than 19% of Platte County and development there requires a floodplain development permit¹. USDA rates 37.1% of Platte County soils "not limited" for conventional drain fields; a site evaluation determines the design needed on the actual parcel¹⁷. Confirm whether the parcel sits inside the 2-mile jurisdiction of Columbus or the 1-mile jurisdiction of a village or second-class city, since that changes who handles zoning approval and may change who handles a building permit; DWEE still handles the septic program^2,3. Check access before buying: Platte County cannot issue a driveway permit within 100 feet of an adjacent intersection's centerline, and required drainage installation may add costs despite the no-fee permit⁶. For a recently split tract, ask the County Clerk about subdivision review; individual well-and-septic lots under 3 acres need state environmental approval⁸. Platte County's effective property tax rate is near 1.3%, a median bill around $2,789 a year, against a typical home value of about $283,795¹⁷.