Unincorporated Cass County, Nebraska requires an approved permit for most construction, land-use changes and structural alterations within the county's jurisdiction1. Cass County also zones rural land and provides building-permit and inspection services to several villages by agreement23. Septic systems fall under Nebraska's statewide onsite wastewater program, with construction permits required only for systems that are not covered by the general permit framework45.
At a glance
- Building permit
- Required for most construction, land-use changes and structural alterations in county jurisdiction1
- Zoning
- Yes; Cass County serves rural areas and specified villages23
- Septic
- State-regulated; most systems use Authorization by Rule, while some need a permit65
- Owner-builder
- Exempt from contractor registration on your own property, but not from permits or codes7
- RV living
- A private-land occupancy rule could not be confirmed; ask Planning & Zoning3
- Tiny home
- Occupancy and minimum size depend on rules that could not be confirmed; ask Planning & Zoning3
- Floodplain development
- Requires a permit83
Who to call
Building permits
Cass County Planning & Zoning Department
Building permits and inspections, zoning, floodplain development permits, county road access permits, subdivisions and other land-use changes
13860 12th St. Plattsmouth, NE 68048-1964
Septic permits
Nebraska DWEE Onsite Wastewater Program
Statewide onsite wastewater rules, system registration, professional certification, subdivision review and site-specific permits
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 27, 2026.
Do you need a building permit in Cass County, Nebraska?
Yes—Cass County requires an approved permit for most construction activities, land-use changes and structural alterations within its jurisdiction1. The requirement is framed as applying to most activities, so the exact project and parcel location matter1. Applicants should download the appropriate application and submit it with detailed site plans to the Planning & Zoning Department; if the permit type or zoning district is unclear, ask the office before filing9. Nebraska also has a state building code, while local adoption and farm-purpose exceptions can affect which technical standards apply10. Cass County's own building-code page should therefore be checked alongside the zoning district before plans are finalized3.
Who issues building and land-use permits in Cass County?
Cass County Planning & Zoning is the main permit office for rural Cass County3. The department administers applications for building permits and inspections, floodplain development permits, county-road access permits, zoning changes, conditional uses, subdivision plats and other land-use changes3. Cass County also provides building-permit and inspection services by interlocal agreement for Alvo, Avoca, Cedar Creek, Elmwood, Greenwood, Manley, Murray, Nehawka, South Bend, Union and Weeping Water3. Other incorporated places may have their own jurisdiction, so confirm the parcel's governing authority before applying2. Reach Cass County Planning & Zoning at (402) 296-9359 or [email protected]3.
Does Cass County have zoning?
Cass County has zoning for rural and unincorporated areas within the county's zoning jurisdiction2. Nebraska law lets county zoning regulate structures, lot coverage, setbacks, yards, density and land uses, but county power does not reach incorporated cities or villages, or areas where a city or village is exercising granted or ceded zoning jurisdiction11. That means parcel location and zoning district are essential before deciding where a house, shop, manufactured home or accessory structure can sit11. Nebraska law allows a county board to apply foundation, utility, setback and minimum-area standards to manufactured homes, but we could not confirm Cass County's district-specific measurements12. Ask Planning & Zoning for the parcel's district and the current dimensional table3.
How do septic permits work in Cass County?
Nebraska's Department of Water, Energy, and Environment administers statewide onsite wastewater rules, and any Cass County local requirements would be separate and additional4. Most Nebraska onsite wastewater systems proceed under Authorization by Rule without a construction permit, but systems involving large size, non-domestic waste or siting issues may require site-specific review and a permit5. A system that is constructed, reconstructed, altered, modified or otherwise changed must be registered with the state5. Inspection must be performed or supervised by an authorized certified professional, licensed professional engineer or registered environmental health specialist13. Only about 5.9% of Cass County soils are rated without severe limitations for a conventional drain field, so make septic feasibility an early purchase contingency14. Contact the Nebraska DWEE Onsite Wastewater Program at (402) 471-4285 or [email protected]15.
Can you live in an RV or tiny home on land in Cass County?
We could not confirm a Cass County rule allowing or prohibiting long-term RV occupancy, temporary camping on private land or tiny-home occupancy in unincorporated areas, so ask Planning & Zoning about the parcel's district before buying or moving in3. Nebraska's rule restricting camping on undesignated public highways, roadside areas and parks does not answer whether an RV may be occupied on private land16. A dwelling that generates wastewater must use a compliant onsite wastewater system or connect to public sewer or another wastewater works17. For a manufactured home, Nebraska law permits counties to apply the same foundation, permanent utility, setback and minimum-area standards used for site-built homes in the same district12.
Building a home in Cass County: the steps, in order
- Confirm whether the parcel is in Cass County's rural jurisdiction, an interlocal-service village or another municipality's jurisdiction3.
- Ask Planning & Zoning to identify the zoning district and required applications, then submit the correct form with detailed site plans9.
- Check floodplain status because all Nebraska floodplain development requires a permit, and Cass County Planning & Zoning administers local floodplain applications83.
- Have a certified onsite professional evaluate wastewater options, then follow state registration or site-specific permitting requirements as applicable513.
- Apply through Cass County for a county-road access permit, or through the state for a new, moved or altered driveway connecting to a state highway318.
- An owner working on their own property is exempt from contractor registration, but that exemption does not remove permit, inspection or code obligations7.
What should you check before buying land in Cass County?
Start with jurisdiction and zoning: Cass County regulates rural land, while municipal authority can replace county zoning in incorporated or delegated areas211. Check septic before closing because only about 5.9% of county soils are rated without severe limitations for a conventional drain field14. Verify floodplain and road access because floodplain development needs a permit and Cass County Planning & Zoning administers county-road access applications83. A state-highway entrance requires a Nebraska Department of Transportation permit18. Cass County's effective property-tax rate is about 1.4%, with a median annual bill near $3,5451920. The nearest city of 100,000 or more is about 25 miles from the county's center21.
Watch-outs
- Cass County says permits are required for most construction and land-use changes, so verify the exact permit before ordering plans or materials1.
- Only about 5.9% of Cass County soils are rated without severe limitations for a conventional septic drain field, making a professional site evaluation important before purchase14.
- Cass County's private-land RV, temporary-camping, tiny-home, well and countywide minimum-size rules could not be confirmed; ask Planning & Zoning and the Nebraska DWEE Onsite Wastewater Program before relying on an off-grid plan315.
Sources
- Zoning Permits, quoted and re-checked
- Planning & Zoning (2026 county census)
- Cass County Planning & Zoning Department (casscountyne.gov)
- Onsite Wastewater Program (Nebraska statewide rule), quoted and re-checked
- Onsite Wastewater Program (Nebraska statewide rule), quoted and re-checked
- Nebraska Department of Environment and Energy (2026 county census)
- Nebraska Revised Statute 48-2104 — Registration required (Nebraska statewide rule), quoted and re-checked
- Floodplain Management Q&A: Permits (Nebraska statewide rule), quoted and re-checked
- Zoning Permits, quoted and re-checked
- Nebraska Revised Statute 71-6403: State building code; adopted; amendments (Nebraska statewide rule), quoted and re-checked
- Nebraska Revised Statute 23-114 (Nebraska statewide rule), quoted and re-checked
- Nebraska Revised Statute 23-114 (Nebraska statewide rule), quoted and re-checked
- Nebraska Revised Statute 81-15,248 (Nebraska statewide rule), quoted and re-checked
- Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
- Nebraska DWEE Onsite Wastewater Program (dwee.nebraska.gov)
- Nebraska Revised Statute 39-312 — Camping; permitted; where; violation; penalty (Nebraska statewide rule), quoted and re-checked
- Onsite Wastewater Treatment Facilities: Just for Homeowners (Nebraska statewide rule), quoted and re-checked
- Title 410, Chapter 2 - Driveway and Approach Road Permits (Nebraska statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Distance to the nearest metro area: 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.