Cost of accessory dwelling unit

Looking for cost of accessory dwelling unit in Knoxville, TN? Call AccessoryDwellingUnit Experts for a contact a provider — no obligation. Licensed adu builders serve Knoxville 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

Building an ADU involves several variables that influence the total investment, including your local site conditions, utility hookups, and the finishes you select for the interior. We focus on transparency throughout your project planning to keep you on budget. Exact pricing confirmed free on the call.

Frequently asked in Knoxville

What are the disadvantages of ADUs in Knoxville?

Potential disadvantages in Knoxville can include navigating specific zoning ordinances for your chosen neighborhood. Some areas might have limitations on size or placement. You'll also want to consider the upfront investment and potential impact on your current yard space. Discussing these with local pros is a great first step.

How much does an ADU cost in Tennessee?

What are the rules for ADUs in Tennessee?

Is an ADU allowed in Knoxville?

What are the rules for ADUs in California?

California has statewide ADU laws designed to encourage their development, but local jurisdictions like cities and counties still have specific ordinances. These often address lot coverage, height limits, and parking requirements. Consulting with local experts is vital to ensure compliance with both state and local rules for your project.

While specific grant programs can change, understanding potential funding options is always a good idea. If similar initiatives are available in Tennessee, local pros can help you explore those possibilities.

Also serving nearby: Asheville · Chattanooga · Murfreesboro · Roswell · Sandy Springs

All cities in Tennessee →

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

Service area details

198,162residents

2,007per sq mile

8ZIP codes served

Serving all of Knoxville — population 198,162; about 2,007 residents per square mile across 98.7 sq mi. ZIP codes covered include 37901, 37902, 37909, 37912, 37914, 37915, 37916, 37917.

Neighborhoods served in Knoxville: Downtown Knoxville, Old City, Bearden, West Hills, Fountain City — and every surrounding area.