Can I Build Garage in Boise, ID? (2026)
Find out if you can build a garage in Boise, ID. Rules, permit requirements, costs, and next steps.
Building a detached garage in Boise, ID requires a building permit. Setback requirements and lot coverage limits apply.
Building a detached or attached garage in Boise, ID typically requires a building permit through the local building department. Garages are governed by the same structural permit requirements as room additions, plus setback requirements that vary by zone. Detached garages must comply with accessory structure setbacks in Boise, and total lot coverage (all covered structures combined) must not exceed zone limits.
Garage Rules in Boise
Garage Construction Rules in Boise: Permit required: Conditional depending on size. R-1A zone setbacks (typical): Front varies ft, Side varies ft, Rear varies ft. Check your zone's lot coverage limits — adding a garage may push total coverage over the maximum.
Costs & Fees
Contact the local building department at (208) 608-7100 for current permit fee information.
Next Steps
Next steps for building a garage in Boise: 1. Verify your zone setback requirements and lot coverage limits. 2. Prepare site plan showing garage location relative to property lines. 3. Submit a building permit application to the local building department. 4. Once approved, begin construction with required inspections at foundation, framing, and final.
Boise Planning and Development Services — Building Division
Phone: (208) 608-7100 · Verified July 6, 2026 · Source
Website: https://www.cityofboise.org/departments/planning-and-development-services/
Online Permits: https://www.cityofboise.org/departments/planning-and-development-services/
Frequently Asked Questions
Can I build an ADU in Boise?
Yes. Boise allows ADUs (accessory dwelling units) through its local zoning code (City Code Title 11). You can build a detached or attached ADU on most residential lots. Idaho does not have statewide ADU preemption, but Boise has adopted permissive local ADU allowances. Detached ADUs are limited to 1,000 sqft. No owner-occupancy requirement applies. Permits are processed by Boise Planning and Development Services.
Does Boise require a permit for short-term rentals?
Yes. Boise requires a Short-Term Rental License ($125/year) for all Airbnb-style rentals. An annual fire safety inspection is also required. The license number must be displayed on all listing platforms. Airbnb and VRBO collect and remit applicable Idaho state sales tax and local lodging taxes on behalf of hosts.
What are the setbacks in an R-1C zone in Boise?
In an R-1C zone in Boise (standard single-family residential), the setbacks are: 20 ft front, 5 ft each side, and 20 ft rear. ADUs must maintain 5 ft side and 10 ft rear setbacks. Always verify specific parcel setbacks with Boise Planning and Development Services.
Are solar panels required on new homes in Boise?
No. Idaho does not have a solar mandate for residential construction. Solar is voluntary in Boise. Idaho Power serves the Boise area and offers net metering through their Solar PV Program. HOAs have limited ability to prohibit solar installations under Idaho Code Section 55-115.
What makes Boise zoning unique?
Boise is one of the fastest-growing cities in the US and has updated its zoning code to address rapid growth and housing demand. The city has hillside development constraints through the Hillside and Foothill Development Ordinance for properties in the foothills areas. Boise is also notable for its Greenbelt trail system along the Boise River, which creates open space requirements near the river.
Source: Boise Planning and Development Services — Building Division — Building Regulations. Last verified April 5, 2026. View source