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Accessory dwelling unit permit cost — Knoxville, TN

Looking for accessory dwelling unit permit cost 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.

Frequently asked in Knoxville

What are the disadvantages of ADUs in Knoxville?

One disadvantage can be the upfront construction cost, which varies greatly depending on size and site specifics. Local zoning laws in Knoxville also dictate size, placement, and sometimes even architectural style. You'll also want to consider potential impacts on your existing property's yard space and privacy.

How much does an ADU cost in Tennessee?
What are the rules for ADUs in Knoxville?

Knoxville has specific zoning ordinances that govern ADUs, covering things like lot coverage, setbacks, and the maximum number of units allowed per lot. It's important to consult with the city's planning department or a professional familiar with these rules. They can clarify requirements for your specific location.

Is an ADU allowed in Tennessee?

Yes, ADUs are generally allowed in Tennessee, but specific regulations and requirements can vary by city and county. Knoxville has its own set of rules that you'll need to follow. Understanding these local guidelines is the first step in planning your ADU project.

What is the accessory dwelling unit permit cost in Knoxville?

Permit costs for ADUs in Knoxville depend on the project's valuation and the specific permits required by the city. These fees cover the review and inspection process to ensure compliance with building codes. A professional can help you understand what to expect for your specific build.

Can I build an ADU on my property in Knoxville?

Whether you can build an ADU on your property in Knoxville depends on local zoning ordinances, lot size, and existing structures. The city has specific requirements regarding setbacks, height, and lot coverage that must be met. A site assessment by a qualified professional is recommended.

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

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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 Knoxville, Fountain City, Sequoyah Hills — and every surrounding area.

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