Accessory dwelling unit contractor

Looking for accessory dwelling unit contractor in Boise City, ID? Call AccessoryDwellingUnit Experts for a contact a provider — no obligation. Licensed adu builders serve Boise City and the surrounding area, and you'll get straight answers on timing and what affects the price.

Last updated: September 24, 2026

What affects the price

Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.

About this service

A dedicated contractor manages the heavy lifting of your ADU project. This involves hiring skilled tradespeople, ordering materials, and ensuring that every phase of construction passes municipal inspections. You need a contractor when you want a single point of contact to oversee the transition from a vacant backyard area to a fully finished, livable home. They bridge the gap between initial architectural designs and the final move-in date for your new space.

Frequently asked in Boise City

What are the disadvantages of ADUs?

The primary disadvantages of ADUs can include the initial construction costs and the impact on your existing yard space. You might also experience an increase in your property's utility bills. However, for many Boise homeowners, the benefits of added living space, potential rental income, and increased property value often outweigh these considerations.

How much does an ADU cost in Idaho?

The cost of an ADU in Idaho varies significantly based on its size, design complexity, the quality of materials used, and site-specific conditions. Factors like labor costs and local market prices in Boise City will also influence the overall expense. To get an accurate estimate for your ADU project, it's best to consult with a local expert.

What are the rules for ADUs in Idaho?

Idaho has state legislation encouraging ADUs, but local cities like Boise City have their own specific zoning ordinances and building codes. These typically outline requirements for lot size, setbacks from property lines, maximum unit size, and parking provisions. Understanding these local nuances is crucial for a successful ADU project.

Is an ADU allowed in Boise City?

Can I build a basement apartment as an ADU?

Adding a basement apartment as an ADU is often a feasible option in Boise City, especially in homes with suitable basement space. You'll need to ensure the conversion meets all building codes for egress, ventilation, and ceiling height. A quick call can help you determine the suitability of your basement for an ADU.

What permits do I need for an ADU in Boise City?

You will likely need to obtain building permits, zoning approvals, and potentially electrical and plumbing permits. The exact requirements depend on the specifics of your ADU project. The professionals you’ll speak with can guide you through the necessary permitting process with the City of Boise.

Also serving nearby: Meridian · Nampa · Bend · Spokane Valley · Spokane

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More on this: HUD ADU resources — ADU policy and financing research.