Cass County, Nebraska
Plattsmouth is a city in Cass County, Nebraska. Plattsmouth adopts its own zoning, so inside its limits Plattsmouth’s rules apply, not the county’s. Septic permits inside Plattsmouth come from Plattsmouth. 15 rules below are quoted from official sources and independently re-checked, most recently on November 11, 2026. Rules for unincorporated land are on the Cass County page.
Erecting, repairing, enlarging, demolishing or relocating buildings inside Plattsmouth city
exempt structure size: <= 10 x 15 feet
“no building permit shall be required for any structure that is 10 feet by 15 feet or less.”
All construction inside Plattsmouth city and its zoning jurisdiction
IRC edition listed: 2000 (newer editions automatically apply)
“the current editions, and the latest additions published hereafter, of the following building codes are hereby adopted by the city of plattsmouth, nebraska for all construction within the city and its zoning jurisdiction:”
Permitted construction inside Plattsmouth city
“the application, plans and specifications so filed with the city clerk shall be checked and examined by the building inspector, who shall make an on-site inspection of the land involved in the proposed project”
Land inside Plattsmouth city limits (Cass County, NE)
“article four presents the "zoning district" regulations. zoning districts are established in the zoning ordinance to promote compatible land use patterns and to establish site development regulations appropriate to the purposes and specific nature of each district.”
Zoning districts inside Plattsmouth city
“the following base districts and overlay districts are hereby established.”
R-1 Urban Residential Low-Density District inside Plattsmouth city (AG and RR districts not read)
minimum lot area, one-family detached: >= 7500 square feet · minimum lot width: >= 75 feet
“site area per housing unit 7,500 6,000 7,500 square 5,000 minimum lot area feet per unit 7,500 minimum lot width (feet) 75 45 per unit 75”
R-1 Urban Residential Low-Density District inside Plattsmouth city
front yard: >= 25 feet · side yard: >= 15 feet (note 1) · street side yard: >= 20 feet · rear yard: >= 20 feet (computed as 20 percent of lot depth times lot width)
“minimum yards (feet) front yard 25 25 25 side yard (note 1) 15 15 15 street side yard 20 20 20 rear yard* 20 20 20”
R-1 Urban Residential Low-Density District inside Plattsmouth city
maximum building coverage: <= 40 percent · maximum impervious coverage: <= 50 percent
“maximum building coverage 40% 40% 40% maximum impervious coverage 50% 50% 50%”
R-1 Urban Residential Low-Density District inside Plattsmouth city
maximum height: <= 36 feet
“maximum height (feet) 36 36 36 maximum building coverage 40% 40% 40%”
Private sewage disposal systems inside Plattsmouth city where public sewer is not available
“before commencing construction of a private sewage disposal system, the owner shall first obtain a written permit signed by the utilities superintendent.”
Private sewage disposal systems inside Plattsmouth city
minimum lot area for subsurface absorption: >= 10000 square feet
“no permit shall be issued for any private sewage disposal system employing subsurface soil absorption facilities where the area of the lost is less than 10,000 square feet.”
Private sewage disposal systems inside Plattsmouth city
“in any event, the applicant for the permit shall notify the utilities superintendent when the work is ready for final inspection and before any underground portions are covered.”
Privies, septic tanks and cesspools inside Plattsmouth city
“except as hereinafter provided, it shall be unlawful to construct or maintain any privy, privy vault, septic tank, cesspool, or other facility intended or used for the disposal of sewage.”
Buildings inside Plattsmouth city abutting a street, alley or right-of-way with a public sewer
distance to public sewer: <= 100 feet · connection deadline: <= 90 days (after official notice)
“to connect such facilities directly with the proper public sewer in accordance with the provisions of this article within 90 days after the date of official notice to do so; provided that said public sewer is within 100 feet of the property line.”
Building permit applications inside Plattsmouth city
“the application shall be in writing on a form to be furnished by the city clerk for that purpose.”
We looked and could not find an official answer yet. Silence is not permission; ask Plattsmouth or Cass County directly.
Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.
Unanswered questions are usually a sign that Plattsmouth publishes no rule on the point, not that none exists. Cass County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Plattsmouth means bringing your own water and power. The kit we’d start with:
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