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When a permit is required
Permit triggers and exempt work for Lost River
Building notification/permit requirements depend on current jurisdictional status. City of Lost River is officially incorporated but currently governmentally inactive (no elected officials or municipal staff actively conducting business). Default to unincorporated Custer County standards for most properties.
- Exempt Minor repairs and maintenance
- Exempt Minor farm buildings
Note: City of Lost River is governmentally inactive. Contact Custer County Planning & Zoning to determine exemptions and current procedures.
- Building notification application form
- Site plan or sketch
- Proof of property ownership
- Approved septic permit (if applicable)
- Zoning compliance certification (if required)
- Building code
- 2018 International Building Code (IBC), 2018 International Residential Code (IRC) with Idaho state amendments.
- Contractor requirements
- Contractor registration required for projects $2,000 or more per Idaho Code § 54-52. Registration number must be presented before permit issuance.
Application process
Typical processing: Depends on current jurisdiction; recommend contacting county for timeline estimates.
- 01 Contact Custer County Planning & Zoning Department (208-879-2379) to determine current jurisdiction and permitting requirements.
- 02 Follow unincorporated Custer County process or specific Lost River procedures if city has reactivated governance.
- 03 Obtain zoning compliance certificate if required.
- 04 Obtain approved septic permit from Eastern Idaho Public Health if applicable.
- 05 Submit building notification application with all required documents.
- 06 County reviews and issues building notification.
- 07 Obtain electrical, plumbing, and HVAC permits from Idaho Division of Building Safety if required.
Typical processing time: Depends on current jurisdiction; recommend contacting county for timeline estimates.
Source: City of Lost River — Custer County Planning & Zoning (See Note) ↗
Required inspections
Scheduling and sequence
- Inspection hours
- Contact Custer County
Frequently asked
Common questions about Lost River permits
01 Do I need a building permit in Lost River, ID? ▸
02 How do I apply for a building permit in Lost River, ID? ▸
03 How long does it take to get a building permit in Lost River, ID? ▸
04 What work is exempt from building permits in Lost River, ID? ▸
Educational reference. Permit rules and fees change — confirm current requirements directly with City of Lost River — Custer County Planning & Zoning (See Note) before applying. Jaspector is not legal advice.