Cost of Accessory Dwelling Unit in Knoxville, TN

Looking for cost of accessory dwelling unit in Knoxville, TN? Call AccessoryDwellingUnit Direct 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 involves variables that shift your total investment. The footprint size and complexity of the architectural design are primary factors. Are you planning a detached unit that requires new utility trenching, or is this a garage conversion that uses existing plumbing? Site accessibility, soil conditions, and your choice of finishes—like luxury flooring versus standard options—also play significant roles. Permitting fees vary widely depending on your local municipality and current zoning requirements. Exact pricing confirmed free on the call.

About this service

Building an ADU involves several variables that shift your final total, such as the size of the unit, whether you choose a detached structure or a garage conversion, and the complexity of your site’s plumbing and electrical needs. We help you navigate these choices to keep your project on track. 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 local zoning laws, which might have specific setback requirements or limits on the number of ADUs per lot. You'll also want to consider the impact on your existing utilities and yard space. The initial construction costs are also a factor to weigh against the benefits. It's wise to discuss these with a local pro.

How much does an ADU cost in Tennessee?

What are the rules for ADUs in Tennessee?

Tennessee's rules for ADUs can differ by city. In Knoxville, you'll need to check the specific zoning ordinances regarding minimum lot size, parking requirements, and the maximum square footage allowed for an accessory dwelling unit. Understanding these local regulations is crucial before you begin.

Is an ADU allowed in Knoxville?

Yes, accessory dwelling units are generally allowed in Knoxville, but there are specific regulations you must follow. These rules cover things like how close the ADU can be to property lines and how it needs to be integrated with the main house. A local expert can confirm compliance for your address.

Can I build an ADU on my property in Knoxville?

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: Old City, Downtown Knoxville, West Knoxville, South Knoxville, North Knoxville, Bearden — and every surrounding area.