ADU · Boise

ADU Construction in Boise, ID

The highest long-term ROI of any addition.

The fastest-growing mid-size city in the country is now paying Pacific Northwest prices for Pacific Northwest labor.

ADUs are the fastest-growing residential category in 2026 for a reason: they pay for themselves. We match you with firms that build to code and to rent, detached, attached, or garage conversion, with the local ordinance know-how that makes or breaks the project.

Typical cost $50,000 – $250,000
Per sq ft $150–$300 / sq ft
Timeline 4 to 8 months
Resale ROI ~41% added appraisal value, plus $1,500–$2,500/mo rent
Cost note Detached 400–800 sq ft: $100k–$250k. Garage conversions: $50k–$120k. Avg build ~$180k.

Boise market

ADU in Boise: what the market looks like

Boise absorbed a wave of California and Washington migration that pushed home values and construction costs sharply upward. Older North End and East End neighborhoods reward renovation. Newer housing in Meridian and Eagle drives suburban remodeling.

Permits in Boise

Boise's permitting is clear and well-staffed for its size. Meridian and Eagle each have separate departments. The firms we match know which municipality governs which property and file complete packages that clear review on the first pass.

Boise conditions

What adu projects in Boise actually take

Boise's lot rules, setbacks, and parking requirements decide what's buildable before any design starts, so the firms we match confirm zoning feasibility on your specific parcel first. A small footprint loses heat fast, so in Boise's Mountain West winters the envelope and mechanical sizing matter more per square foot than they would on the main house.

Our standard

What we require from adu construction firms in Boise

  • Detached, attached, and garage-conversion ADUs
  • Built to rent: separate metering and entrances
  • Local ADU ordinance and setback expertise
  • Income-property finish, built to rent well for years

ADU Construction in Boise, ID: your questions

What does adu construction cost in Boise, ID?

Boise absorbed a wave of California and Washington migration that pushed home values and construction costs sharply upward. For adu construction specifically: Detached 400–800 sq ft: $100k–$250k. Garage conversions: $50k–$120k. Avg build ~$180k. National range: $50,000–$250,000. In Boise, ID, costs land at or below the national average. Use our cost estimator for a scope-adjusted figure.

How long does adu construction take in Boise, ID?

A typical adu construction project runs 4 to 8 months. In Boise, the permit timeline matters as much as the build window: Boise's permitting is clear and well-staffed for its size. The firms we match commit the completion date in writing.

What permits does adu construction require in Boise, ID?

Boise's permitting is clear and well-staffed for its size. Meridian and Eagle each have separate departments. The firms we match know which municipality governs which property and file complete packages that clear review on the first pass.

How do you match adu construction contractors in Boise, ID?

We vet remodeling firms in Boise before the first introduction: license verified, insurance confirmed, references called, complaint history reviewed. You describe the project, we send a short matched list of firms that work in Boise and specialize in adu construction. Free for homeowners.

Get matched for adu construction in Boise.

Tell us about your project. We hand you a short list of vetted local remodelers, free, and stay out of the rest. No phone-blasting, no pressure.