Planning to build or renovate in Boise, Idaho? Whether you’re leading a large commercial project, working on a new custom home, or replacing an HVAC unit, understanding Boise permitting is key to keeping your timeline on track.
This guide walks through Boise building permit requirements, from what requires a permit to how to schedule final inspections.
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What requires a building permit in Boise?
Most construction work in Boise requires a building permit from the City of Boise Building Division.
Here are some common projects that require a permit:
- Building a new one- or two-family dwelling
- Finishing an attic/garage/basement to create living space
- Building, demolishing, or adding a room, garage, shed, carport, or other attached structure
- Building/demolishing/moving a detached garage or shed over 200 sq ft
- Creating new window/door openings, or widening/reducing existing openings
- Moving/removing/adding walls
- Re-roofing an existing structure
- Building a retaining wall 4 ft or higher (measured from bottom of footing to top), or even a 2 ft wall with slope/surcharge (engineering)
- Building a deck or patio more than 12 inches above grade
- Putting up a fence higher than 7 feet
- Adding/enclosing a patio cover, carport, porch, or other attached roof area
- Pouring sidewalks/slabs/driveways more than 30 inches above grade, or over a basement/story below
What doesn’t require a building permit?
Some smaller projects can move forward without a permit, as long as they don’t impact structural, mechanical, or utility systems. According to the city code of Boise, these include:
- One-story detached accessory structures (tool sheds/playhouses/etc.) <120 sq ft
- Fences <7 ft high
- Retaining walls <4 ft (unless supporting surcharge / special liquids)
- Water tanks on grade <5,000 gallons (and ratio limits)
- Sidewalks/driveways <30 in above grade (and not over a basement/story, not part of an accessible route)
- Finish work like painting, flooring, cabinets, countertops, wall coverings
- Above-ground prefab pools for R-3 that are <24 in deep and <5,000 gallons
- Swings/playground equipment, shade cloth nursery/ag structures, small awnings (R-3/U), etc.
Boise building permit cost
City of Boise building permit fees are based on the project valuation and permit type. Here’s a typical breakdown:
Building permit fee schedule:
Additional fees
How long do building permits last in Boise?
Once issued, most Boise permits are valid for 180 days. The clock resets with each passed inspection.
- If work pauses for 180+ days, the permit will expire
- You can request a one-time extension if needed
- Projects with no activity for 1 year may need to reapply completely
Boise trade permits
Boise requires separate permits for plumbing, electrical, mechanical, and similar trades. These must be pulled by licensed contractors registered with the city.
Plumbing permits
You’ll need a Boise plumbing permit for any new water, waste, or gas piping, including fixture replacements that alter piping.
Residential plumbing
Commercial plumbing
Electrical permits
Electrical permits are required for service panels, circuits, or new electrical work.
Residential
Commercial
Mechanical permits
Mechanical permits apply to heating, ventilation, ductwork, and AC units.
Residential
Commercial
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How to get a building permit in Boise
Step 1: Prepare your documents
Before you apply, collect the basics the City will ask for:
- Boise building permit application. Examples of applications:
- Project description + job valuation — used for valuation-based permit fees and plan review calculations)
- Construction drawings — PDFs are standard for online submittals
- Site plan/property info — often needed when setbacks, drainage, access, utilities, or grading could be involved
- Who is doing the work (contractor registration): Boise’s application notes the permit needs a contractor registration number unless the applicant declares an exemption under Idaho law (Idaho Code 54-5205)
Pro tip: Refer to Boise’s permit-type pages, which provide submittal checklists and document expectations.
Step 2: Apply online through the Boise Permits Portal
Submit your application in the City’s Permitting & Licensing portal. You’ll need to create an account, upload your PDFs, and enter the project info (address, scope, valuation, contractor, etc.).
Step 3: Plan review and corrections
After you submit, Planning & Development Services (PDS) reviews your record and routes it to the right reviewers.
If reviewers leave comments, you’ll revise and re-upload updated PDFs through the portal until the permit can move forward.
Typical review timeframes (what to expect)
Boise publishes a review of timeframes by project type. In one published report window, the average first review times look like this:
- Single Family Level 1: ~7 days (target <10)
- Single Family Level 2: ~14 days (target <14)
- Add/Alt/Repairs Level 1: <1 day (target <1)
- Add/Alt/Repairs Level 2: ~5 days (target <5)
- Tenant Improvement Level 1: ~4 days (target <5)
- Tenant Improvement Level 2: ~10 days (target <10)
- Tenant Improvement Level 3: ~23 days (target <20)
- New Commercial Buildings & Additions: ~32 days (target <30)
- New Multi-Family: ~48 days (target <30)
Note: These are snapshot averages from a specific reporting period, so they can change based on staffing, volume, and project complexity. Still, they’re useful as a ballpark for what Boise considers typical.
Step 4: Pay permit fees
When your application is approved, the portal will show fees due. Pay through the same system. Once payment is accepted, your building permit is issued and you can move onto inspections.
Step 5: Print permit and begin work
Print the issued permit, post it visibly at the job site, and keep approved plans available for inspections.
Permit inspections in Boise
Boise requires inspections throughout construction so the work matches code and the approved plans.
Common inspection stages include:
- Footing / foundation
- Framing
- Electrical / plumbing / mechanical rough-ins
- Insulation / energy-related checks (when applicable)
- Final building and trade inspections (and any required specialty inspections)
How to schedule inspections
You can schedule inspections in two ways:
- Online through Boise’s Permitting & Licensing system, or
- By phone by calling the permit counter at (208) 608-7070
If your permit requires other inspection types:
- Public Works inspections: (208) 608-7150
- Planning inspections: (208) 608-7108
Timelines and guidelines
Inspection windows:
- Morning: 8:00 AM – 12:00 PM
- Afternoon: 1:00 PM – 5:00 PM
Cutoff time:
- The cutoff time for both morning and afternoon inspections is 7:30 AM daily
Reinspections:
- If something doesn’t pass, you’ll correct it and request a reinspection (normal process)
Closing out your permit
To finalize:
- Pass all required final inspections (building + any trade finals)
- Upload as-builts / final documents only if your permit conditions require them
- Receive your final approval and (when required) a Certificate of Occupancy
Note: Boise states a Certificate of Occupancy is required for commercial tenants occupying a space and it must be obtained before opening for business.
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Boise permitting resources
- City of Boise Planning & Development Services
- 150 N Capitol Blvd, Boise, ID 83702
- Phone: (208) 608-7100
- Fax: (208) 384-3753
- Hours: Monday - Friday, 8 a.m. - 5 p.m.
- Boise permits portal
- Building permit info & forms
- City of Boise permit search
- Fees:
- Boise building permit applications:
- Homeowner’s guide to residential construction
- City code of Boise
- Permit processing timeframes
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