Canyon County, ID - 2026 Building Permit Guide

Permit Authority

Covers all unincorporated areas of Canyon County. Does not cover incorporated cities, which have their own building departments. As of September 1, 2023, HVAC permitting and inspections are handled by the State of Idaho DOPL, not the county. Electrical and plumbing are also handled by DOPL statewide.

Department

Canyon County Development Services Department - Building Division

Address

1115 Albany Street, Caldwell, ID 83605

Phone

(208) 454-7458

Email

BuildingInfo@canyoncounty.id.gov

Website

https://www.canyoncounty.id.gov/building-department/

Online Permit Portal

Application Process

1. Confirm property is in unincorporated Canyon County (not within any city limits).
2. Obtain pre-permit approvals as required: wastewater (septic approval from Southwest District Health, or sewer hookup authorization), highway district access permit, fire district approval if structure is 150+ feet from public road, and floodplain development permit if in a flood hazard area.
3. If in a subdivision, obtain Architectural Control Committee (ACC) review and approval.
4. Prepare application packet: completed building permit application, deed or sales agreement, plat map, detailed site plan to scale, building plans to scale, property pins marked on site.
5. Pay zoning compliance fee ($70) and residential plan review fee ($180) at intake. Commercial plan review fees vary.
6. Submit completed packet in person at 1115 Albany Street, Caldwell. Intake hours: 8:00 AM - 12:00 PM and 1:00 PM - 3:30 PM, Monday through Friday. Incomplete applications are not accepted.
7. Plans are reviewed for code compliance. Corrections are requested if needed.
8. Once approved, building permit fees and impact fees are invoiced and paid upon permit pickup.
9. Post approved plans and permit on site. Inspections are scheduled as work progresses.
10. Final inspection conducted; certificate of occupancy or completion issued upon passing.

Typical processing time: Not publicly specified. Contact department for current turnaround times.

Source: Canyon County Development Services Department - Building Division

General Requirements

Any person erecting, constructing, enlarging, altering, repairing, improving, moving, removing, converting, or demolishing any building or structure must obtain a permit. Required for all new construction greater than 200 square feet or attached to another structure.

Required Documents

• Completed building permit application
• Deed or sales agreement
• Plat map
• Detailed site plan to scale
• Building plans to scale (color prints required on site for inspections)
• Applicable pre-permit approvals (wastewater, highway district, fire district as applicable)

Permit validity

Not publicly specified; contact department for current policy.

Building code

Idaho state code adoptions (2018 IBC, 2018 IRC with state amendments) apply as the baseline. Contact department for current adopted version with local amendments.

Owner-builder

Not explicitly stated in publicly available materials; contact department.

Contractor requirements

Idaho contractor registration required per Idaho Code 54-52 unless exempt under Idaho Code 54-5205.

Fees

Plan check fee

Residential plan review fee: $180 (paid at application intake)

Permit fee formula

Building permit fees are reported to average approximately 2% of total market value.

Reinspection fee

$50 if work is not ready when inspection is scheduled

Payment note

Fees are paid in person at the department. Impact fees also due at permit pickup.

Fees change. Verify current amounts at the official fee schedule.

Work That Does NOT Require a Permit

• One-story detached accessory structures (tool and storage sheds, tree-supported play structures, playhouses) not exceeding 200 square feet with a maximum wall height of 10 feet
• Agricultural buildings (note: zoning compliance/permit still required to verify location does not obstruct fire district turnaround, and to confirm compliance with setbacks, utility easements, and flood hazard area regulations)
• Fences (zoning compliance may still apply)
• Work below a threshold that does not add floor area or alter structure; contact department for specific exclusions

Important: Zoning compliance may still apply to exempt items. Confirm edge cases with the Building Division before proceeding.

Inspections

How to Schedule

• Inspection line: (208) 454-7458 (phone)

Scheduling deadline

Inspections scheduled for the following business day after the call.

Inspection hours

Monday through Friday, 7:00 AM to 4:00 PM (excluding holidays)

Time windows

Inspections scheduled for the following business day after the call.

Typical inspection sequence: Foundation/footing, framing (rough-in), insulation, mechanical rough-in (DOPL-handled), plumbing rough-in (DOPL-handled), electrical rough-in (DOPL-handled), final inspection, certificate of occupancy/completion.

All inspectors work remotely. A sampling of inspections may be required depending on project scope. Approved plans and engineering documents must be printed in color and on-site for every inspection.

Additional Resources

• Building code: Idaho state code adoptions (2018 IBC, 2018 IRC with state amendments) apply as the baseline. Contact department for current adopted version with local amendments.
• Zoning information: View zoning info
• Development Services Overview
• Building Permit Checklist
• DOPL (Electrical, Plumbing, HVAC)
• Southwest District Health (Septic Approvals)
• License lookup guide: Idaho Contractor License Requirements
• Contract template: Idaho Homeowner-Contractor Agreement
• Idaho hub: Idaho Contractor License & Permit Hub

Frequently Asked Questions

Canyon County Building Permit FAQ

Do I need a building permit in unincorporated Canyon County, ID?

Any person erecting, constructing, enlarging, altering, repairing, improving, moving, removing, converting, or demolishing any building or structure must obtain a permit. Required for all new construction greater than 200 square feet or attached to another structure.

How much does a building permit cost in unincorporated Canyon County, ID?

Fees are calculated as: Building permit fees are reported to average approximately 2% of total market value.. Plan check fee: Residential plan review fee: $180 (paid at application intake).

How do I apply for a building permit in unincorporated Canyon County, ID?

1. Confirm property is in unincorporated Canyon County (not within any city limits). 2. Obtain pre-permit approvals as required: wastewater (septic approval from Southwest District Health, or sewer hookup authorization), highway district access permit, fire district approval if structure is 150+ feet from public road, and floodplain development permit if in a flood hazard area. 3. If in a subdivision, obtain Architectural Control Committee (ACC) review and approval. 4. Prepare application packet: completed building permit application, deed or sales agreement, plat map, detailed site plan to scale, building plans to scale, property pins marked on site. 5. Pay zoning compliance fee ($70) and residential plan review fee ($180) at intake. Commercial plan review fees vary. 6. Submit completed packet in person at 1115 Albany Street, Caldwell. Intake hours: 8:00 AM - 12:00 PM and 1:00 PM - 3:30 PM, Monday through Friday. Incomplete applications are not accepted. 7. Plans are reviewed for code compliance. Corrections are requested if needed. 8. Once approved, building permit fees and impact fees are invoiced and paid upon permit pickup. 9. Post approved plans and permit on site. Inspections are scheduled as work progresses. 10. Final inspection conducted; certificate of occupancy or completion issued upon passing.

How long does it take to get a building permit in unincorporated Canyon County, ID?

Typical processing time is Not publicly specified. Contact department for current turnaround times..

What work is exempt from building permits in unincorporated Canyon County, ID?

The following work is generally exempt: One-story detached accessory structures (tool and storage sheds, tree-supported play structures, playhouses) not exceeding 200 square feet with a maximum wall height of 10 feet; Agricultural buildings (note: zoning compliance/permit still required to verify location does not obstruct fire district turnaround, and to confirm compliance with setbacks, utility easements, and flood hazard area regulations); Fences (zoning compliance may still apply); Work below a threshold that does not add floor area or alter structure; contact department for specific exclusions. Note: Zoning compliance may still apply to exempt items. Confirm edge cases with the Building Division before proceeding.

How do I schedule a building inspection in unincorporated Canyon County, ID?

Inspections can be scheduled via: Inspection line: (208) 454-7458. Inspections scheduled for the following business day after the call..