Zoning, building permits and septic rules in Glenns Ferry, Idaho
Glenns Ferry is a city in Elmore County, Idaho. Glenns Ferry adopts its own zoning, so inside its limits Glenns Ferry’s rules apply, not the county’s. 6 rules below are quoted from official sources and independently re-checked, most recently on October 22, 2026. Rules for unincorporated land are on the Elmore County page.
Answers from the rulebook for Glenns Ferry
Glenns Ferry’s own rules
Building permitRequired
Accessory dwelling unit construction inside Glenns Ferry city limits
Construction may proceed only after the ADU permit is obtained, with a separate building permit application and fee.
Listed fee rows include an ADU 'no permit penalty' fee of $300.00.
ADU permit fee: 150 USD (listed on the city fee schedule row for accessory dwelling unit (adu); row assignment in extracted text is ambiguous)
“accessory dwelling unit (adu) after obtaining adu permit, building permit application & fee’s still apply $150.00 accessory dwelling unit (adu) ‘no permit penalty’ $300.00”
Local zoningPresent (with conditions)
Land inside Glenns Ferry city limits: the city's own zoning ordinance (Title 11 Zoning Regulations of the city code)
The city code table of contents lists Title 11 Zoning Regulations and Title 12 Subdivision Regulations; the district text itself was not read, so use rules are unverified.
The city fee schedule lists a zoning ordinance amendment fee and a re-zone fee and a zoning administrator/zoning map, which indicates the city administers its own zoning.
The official code overview states it is current through ord. 26-622, passed 4-14-2026.
“title 11 zoning regulations title 12 subdivision regulations”
Zoning districtsPartial
Zoning districts of the City of Glenns Ferry
A current zoning map (dated 2025-09-10) is listed; the map itself and the district text were not opened, so district names are not verified.
“216044 – gf current zoning map 2025-09-10 (003)”
Accessory dwellingsLimited
Accessory dwelling units inside Glenns Ferry city limits
Allowed only after obtaining an ADU permit; a building permit application and fee still apply.
A separate listed fee, 'no permit penalty', is $300.00; the use standards in the zoning chapter were not read.
ADU permit fee: 150 USD (fee row assignment in extracted text is ambiguous)
“accessory dwelling unit (adu) after obtaining adu permit, building permit application & fee’s still apply $150.00”
Subdividing landRegulated (with conditions)
Division of land inside Glenns Ferry city limits
The code contains a Title 12 Subdivision Regulations chapter; its text was not read, so approval steps and thresholds are unverified.
The city fee schedule lists a parcel/lot split fee of $300.00 and a lot line adjustment fee of $200.00.
parcel/lot split fee: 300 USD (billed with actual legal, engineering and contract fees)
“title 11 zoning regulations title 12 subdivision regulations”
Permit feesPublished (with conditions)
Planning and zoning application fees charged by the City of Glenns Ferry
Actual legal, engineering, and contract fees incurred are billed to the applicant on all listed applications.
Building permit fees were not located in the opened pages.
conditional use permit fee: 300 USD · comprehensive plan amendment fee: 375 USD
“conditional use permit $300.00 comprehensive plan amend $375.00”
Still unanswered
We looked and could not find an official answer yet. Silence is not permission; ask Glenns Ferry or Elmore County directly.
Building code adopted — Land inside Glenns Ferry city limits: which building codes the city adopts
Inspections — Inspections for construction inside Glenns Ferry city limits
Certificate of occupancy — Certificate of occupancy for new homes inside Glenns Ferry city limits
Minimum dwelling size — Minimum dwelling size in the main single-family residential district inside Glenns Ferry city limits
19 more unanswered
Minimum lot size
Setbacks
Lot coverage
Building height
Living in an RV
Camping on your land
Tiny homes
Manufactured homes
Who permits septic
Septic permit
Septic inspection
Off-grid sanitation
Well permit
Mandatory utility hookup
Agricultural exemption
Driveway access
Building in a floodplain
Short-term rentals
Permit process
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 Glenns Ferry publishes no rule on the point, not that none exists. Elmore County’s page lists the county offices to call.
Off-grid gear
Going off-grid in Glenns Ferry means bringing your own water and power. The kit we’d start with:
