Unincorporated Washington County, Nebraska requires county building permits for covered construction, and permits must be issued before work starts.1 County zoning also applies outside incorporated places, except where a city or village is exercising zoning jurisdiction.2 Start with the Washington County Planning Department for building, zoning and county septic review.3
At a glance
- Building permit
- Required for covered construction before work starts1
- Building code
- County uses the 2018 building codes4
- Zoning
- Applies in unincorporated areas outside active municipal jurisdiction2
- Septic
- County application and inspections plus statewide requirements56
- RV living
- Private-land occupancy rule not confirmed; ask Planning & Zoning3
- Tiny homes
- No specific county occupancy rule confirmed; zoning and codes still matter24
- Owner-builder
- State contractor-registration exemption does not waive permits or codes7
Who to call
Building permits
Washington County Planning & Zoning
County building permits and inspections, planning and zoning, floodplain questions, and county septic applications and inspections
1555 Colfax Street Blair, NE 68008
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 Washington County, Nebraska?
Yes. Unincorporated Washington County requires a county permit for construction covered by its building-permit program.8 The permit must be issued before construction begins; starting first doubles the permit application fee.1 New-home applicants must bring two hard-copy plans before the application can proceed.9
Washington County currently uses the 2018 building codes, while electrical permits and electrical inspections are handled by the Nebraska State Electrical Division.4 County-regulated building, mechanical, plumbing, radon, septic and erosion-control work is subject to inspections, and inspection requests require at least 24 hours' notice.10 State inspections must pass before the related county inspection is scheduled.10 Ask Planning & Zoning which permit types and inspection sequence fit the proposed work before finalizing plans.3
Who issues building permits in Washington County, Nebraska?
The Washington County Planning Department is the first stop for county building permits, inspections and zoning questions.3 The office is at 1555 Colfax Street in Blair and can be reached at (402) 426-6872 or [email protected].3
The county publishes an online registration-and-application sequence: create an account, verify the email address, choose Washington County, Nebraska as the jurisdiction, submit the appropriate contractor registration, wait for county approval and then begin the permit application.9 Every required item marked with a red asterisk must be completed.9 Accessory buildings with interior walls require two plans measuring 24 by 36 inches, while new homes require two hard-copy plans before the application proceeds.9 Electrical permits are separate and go through the Nebraska State Electrical Division.4
Does Washington County, Nebraska have zoning?
Yes. Washington County's zoning resolution applies in unincorporated Washington County, except where a city or village has extended and is exercising zoning jurisdiction.2 That boundary matters: a mailing address alone does not establish which zoning office controls a parcel. The county regulates land through zoning districts, so ask Planning & Zoning to identify the parcel's district and current map status before relying on a proposed use.23
A statewide rule allows a county board to set standards for qualifying manufactured homes, including the same foundation, utility-connection, setback and minimum-floor-area standards applied to site-built homes in the district; it also permits a 900-square-foot manufactured-home minimum, but does not impose that minimum on every Nebraska dwelling.11 Washington County's general minimum dwelling size, RV occupancy rule, tiny-home occupancy rule and accessory-dwelling rule could not be confirmed. Ask Planning & Zoning for the rules tied to the specific parcel and proposed structure.3
How do septic permits work in Washington County?
For unincorporated property, Washington County administers its own septic application and inspections, while Nebraska's statewide onsite-wastewater requirements apply separately.56 Blair, Fort Calhoun, Kennard and Herman have their own offices and policies, so property inside those jurisdictions should not use the county process without confirming authority.5
The county lists partial and final septic inspections and requires at least 24 hours' notice.12 The county application process also requires a plot plan showing the tank, laterals, well, geothermal wells and perc-test locations.12 Most Nebraska onsite systems are built under Authorization by Rule rather than a state construction permit, but systems with size, waste or siting issues can require state permitting and all systems remain subject to applicable statewide compliance and registration rules.13 Only about 32.3% of county soils are rated without severe limitations for a conventional drain field, making site evaluation especially important before choosing a homesite.14
Can you live in an RV or tiny home in Washington County?
Washington County's general rule for living in an RV on private land could not be confirmed. The county zoning materials identify an RV-related overlay district, but that does not by itself answer whether an RV may be occupied on a particular parcel. Ask Washington County Planning & Zoning for a written answer tied to the parcel, zoning district, duration and availability of approved wastewater service.3
A specific Washington County tiny-home occupancy rule also could not be confirmed. Any tiny home proposed as a dwelling still has to be evaluated against county zoning and the county's adopted building codes.24 A Nebraska dwelling that generates wastewater must use a compliant onsite wastewater system or connect to public sewer or other wastewater works.15 State law restricting camping on public highways, roadside areas and parks does not answer private-land RV occupancy.16
Building a home in Washington County: what are the steps?
- Confirm that the parcel is in unincorporated Washington County rather than a city or village zoning jurisdiction, then ask Planning & Zoning for the district and allowed residential use.23
- Discuss the homesite, septic layout and required plot plan before fixing the building location; the septic submission must show the tank, laterals, well, geothermal wells and perc-test locations.12
- Register through the county's application system, wait for county approval and start the permit application.9
- Bring two hard-copy plans for a new home and obtain the permit before construction starts.91
- Arrange electrical permitting with the Nebraska State Electrical Division and pass required state inspections before related county inspections.410
- Request county inspections with at least 24 hours' notice and complete every required inspection before the permit expires.10
What should you check before buying land in Washington County?
Start with jurisdiction, zoning and access. County zoning governs unincorporated land except where a city or village is exercising zoning jurisdiction, and a new or altered driveway connecting to a state highway requires a Nebraska highway permit.217 A separate Washington County driveway permit could not be confirmed, so ask Planning & Zoning and the road authority serving the parcel before assuming an existing field entrance is buildable access.3
Check septic suitability early because only about 32.3% of soils are rated without severe limitations for a conventional drain field.14 Check the flood map as well: all development in a Nebraska floodplain requires a permit.18 Private-well permitting and a countywide water-connection rule could not be confirmed, so ask Planning & Zoning which water or sewer authority applies.3 For budgeting context, the effective property-tax rate is about 1.5% and the median annual property-tax bill is about $4,106.1920
Watch-outs
- Starting covered construction before Washington County issues the permit doubles the permit application fee.1
- City or village jurisdiction can replace county zoning, so confirm the governing office for the parcel rather than relying on its mailing address.2
- Only about 32.3% of county soils are rated without severe limitations for a conventional septic drain field.14
- Washington County's private-land RV occupancy and tiny-home occupancy rules could not be confirmed; ask Planning & Zoning for a parcel-specific answer.3
Sources
- Planning & Zoning | Washington County, quoted and re-checked
- Planning & Zoning | Washington County, quoted and re-checked
- Washington County Planning & Zoning (washingtoncountyne.gov)
- Planning & Zoning | Washington County, quoted and re-checked
- Septic Permit Application, quoted and re-checked
- Onsite Wastewater Program (Nebraska statewide rule), quoted and re-checked
- Nebraska Revised Statute 48-2104 — Registration required (Nebraska statewide rule), quoted and re-checked
- Planning & Zoning | Washington County (2026 county census)
- Planning & Zoning | Washington County, quoted and re-checked
- Building Inspections, quoted and re-checked
- Nebraska Revised Statute 23-114 (Nebraska statewide rule), quoted and re-checked
- Building Inspections, quoted and re-checked
- Onsite Wastewater Program (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
- Onsite Wastewater Treatment Facilities: Just for Homeowners (Nebraska statewide rule), quoted and re-checked
- Nebraska Revised Statute 39-312 — Camping; permitted; where; violation; penalty (Nebraska statewide rule), quoted and re-checked
- Title 410, Chapter 2 - Driveway and Approach Road Permits (Nebraska statewide rule), quoted and re-checked
- Floodplain Management Q&A: Permits (Nebraska statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: 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.