Ada vs Canyon County permit flow
Visual guide
A step-by-step view of how a new home permit moves through plan review and inspections in the Treasure Valley. Timelines vary by jurisdiction and by how complete the submitted set is.
Typical permit path
Define scope
Layout, structural, plumbing, or electrical changes?
Confirm jurisdiction
Check the parcel with the city or county building department
Design & plans
Stamped sheets when required
Submit application
Correct city or county portal, required documents and fees
Plan review
Confirm the current queue and respond to corrections
Approved → build
Rough inspections before cover-up
Final inspection
Complete final approvals and required occupancy clearance
Who reviews the property?
Inside city limits
Start with the city building department
- Confirm the parcel boundary
- Ask which trade permits are separate
- Use the city application checklist
Unincorporated property
Start with Ada or Canyon County
- Confirm the parcel jurisdiction
- Check road, utility and health approvals
- Ask about any separate trade authority
Usually needs permits
Ask before assuming an exemption
Questions to confirm before scheduling
| Phase | Confirm with | Ask about |
|---|---|---|
| Plan preparation | Designer and required reviewers | Complete plans and supporting approvals |
| Plan review | City or county building department | Current review queue and correction cycles |
| Inspections | Building and trade authorities | Required stages before covering work |
Confirm the office for your address
A mailing city does not establish the permitting authority. Confirm the parcel before applying. Building, trade, septic and HOA approvals can follow separate processes.
- City of Boise Building: properties within Boise city limits.
- Ada County Development Services and Canyon County Building: confirm county jurisdiction and required applications.
- Septic: Central District Health for Ada County; Southwest District Health for Canyon County.
Source guidance checked October 1, 2026. Ask the responsible office for current requirements and review times.
Note: HOAs in Eagle, Harris Ranch, Hidden Springs, and similar communities may require architectural review in addition to required city or county permits.
Design-build contracts should state who submits plans, pays fees, and schedules inspections. Cosmetic work without layout changes may not need the full path below.