Umatilla County, Oregon
Athena is a city in Umatilla County, Oregon. Athena adopts its own zoning, so inside its limits Athena’s rules apply, not the county’s. Septic permits inside Athena come from the state health agency. 18 rules below are quoted from official sources and independently re-checked, most recently on November 12, 2026. Rules for unincorporated land are on the Umatilla County page.
Construction inside Athena city limits; city-issued building permit plus site development permit
building permit threshold: > 200 square feet (attached structures require a permit regardless of size)
“a building permit shall be required for the following: a. any construction, addition, or improvement exceeding two hundred (200) square feet in area.”
Construction inside Athena city limits
“all work shall comply with applicable state building codes and city regulations.”
Land inside Athena city limits; city zoning ordinance (Ordinance 950)
“2.11 classification of zones. the following use zones are established for application within the city of athena for use by umatilla county within the adopted athena urban growth area.”
Use zones in Athena city
“use zone designation a. suburban residential r-sub b. general residential r-gen c. residential-commercial r-com d. central commercial c-cen e. general industrial m-gen f. flood hazard overlay fh”
R-gen general residential zone inside Athena city limits (R-sub uses the same development standards per 2.25)
single-family standard construction: >= 940 square feet · manufactured homes: >= 1000 square feet
“a. minimum dwelling unit size: 1. single-family standard construction: 940 square feet; manufactured homes: 1,000 square feet.”
R-gen general residential zone inside Athena city limits
single-family or manufactured home: >= 6000 square feet · duplex: >= 9000 square feet
“a. parcel size: a minimum of 6000 square feet for a single-family house or permitted manufactured home; a minimum of 9000 square feet for a duplex.”
“2.24 dimensional standards. a. parcel size: a minimum of 20,000 square feet.”
R-gen general residential zone inside Athena city limits
front yard: >= 15 feet · side yard: >= 5 feet (15 feet on a corner lot) · rear yard: >= 20 feet
“d. yard areas: front - 15 feet side --- 5 feet side on a corner lot - 15 feet back - 20 feet accessory buildings may be built to within 5 feet of the property line except within 15 feet of the front property boundary.”
R-gen general residential zone inside Athena city limits
maximum lot coverage: <= 35 percent (45% for lots of 6,000 sq ft or less)
“b. lot coverage: a maximum of 35% of the site area may be covered by the principal and accessory buildings. lots with an area of 6,000 square feet or less may have a maximum of 45% lot coverage.”
R-gen general residential zone inside Athena city limits
maximum building height: <= 35 feet (accessory buildings 25 feet)
“c. building height: a maximum of 35 feet.”
RV occupancy inside Athena city limits
RV spaces share of manufactured dwelling park: <= 10 percent
“of commercial floor space. f. recreational vehicle park. 2.44 dimensional and development standards.”
Type A manufactured homes in R-sub (and R-gen, R-com) zones inside Athena city limits
“2.22 permitted uses. a. single-family houses b. type a manufactured homes complying with section 2.331.”
Accessory dwelling units in residential zones (except r-mhp, r-apt, r-com) inside Athena city limits
accessory dwelling per site: <= 1 unit
“one accessory dwelling unit per site can be permitted subject to the following standards.”
Private sewage disposal inside Athena city limits
“where a public sanitary sewer is not available under the provisions of article ii, the building sewer shall be connected to a private sewage disposal system complying with the provisions of this article.”
Properties used for human occupancy inside Athena city limits abutting a street, alley or right-of-way with a public sanitary sewer
connection deadline: <= 90 days (after official notice)
“is hereby required at personal expense to install suitable toilet facilities therein, and to connect such facilities directly with the proper public sewer in accordance with the provisions of this ordinance, within ninety (90) days after date of official notice to do so.”
Site development permits inside Athena city limits
permit issuance after approval: <= 5 days
“application for such permits shall be made to the city recorder and shall be submitted to the planning commission.”
Athena does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.
Private sewage disposal systems inside Athena city limits where public sewer is not available (city ordinance sends owner to Oregon DEQ)
“before commencement of construction of a private sewage disposal system, the owner shall first obtain a written permit form the oregon state department of environmental quality.”
Private sewage disposal systems inside Athena city limits where public sewer is not available
“before commencement of construction of a private sewage disposal system, the owner shall first obtain a written permit form the oregon state department of environmental quality.”
We looked and could not find an official answer yet. Silence is not permission; ask Athena or Umatilla 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 Athena publishes no rule on the point, not that none exists. Umatilla County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Athena means bringing your own water and power. The kit we’d start with:
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