ADU Rules in Murfreesboro, Tennessee

Murfreesboro, seat of Rutherford County, has ranked among the fastest-growing cities in the United States for over a decade. Located approximately 35 miles southeast of Nashville, the city has expanded rapidly from a mid-sized college town into a major suburban hub with a population now exceeding 155,000. Middle Tennessee State University (MTSU), with over 20,000 students, is a defining institution in the community and a major driver of housing demand. Stones River National Battlefield, commemorating a pivotal Civil War engagement from December 1862–January 1863, is located on the city's northwest edge.

No Statewide ADU Law in Tennessee

Tennessee has not enacted statewide ADU preemption legislation. Murfreesboro's Planning Department administers the local zoning ordinance, which is the controlling authority for all ADU-related questions within city limits.

What ADUs Are Permitted

Murfreesboro's zoning ordinance permits accessory dwelling units in single-family and certain multi-family residential districts. The rapid pace of development means the city's zoning code has been regularly amended. Common ADU types include:

• Detached ADUs — standalone structures in the rear yard, including garage apartments
• Attached ADUs — additions to the primary dwelling
• Internal conversions — basement apartments or in-law suites within the primary structure

Given Murfreesboro's growth pace, many newer residential subdivisions have significant HOA restrictions that may further limit ADU construction beyond what zoning allows. Always check CC&Rs before proceeding.

Size, Setbacks, and Height

ADU standards in Murfreesboro vary by zoning district. General parameters that have historically applied include:

• Maximum size: ADU floor area is typically capped relative to the primary dwelling; confirm current limits with the Planning Department
• Setbacks: Rear and side setbacks apply per the base zone designation; detached ADUs must maintain minimum distances from property lines and the primary structure
• Height: Detached ADUs are generally limited to one or two stories depending on zone and lot conditions

Stones River Flood Zone Considerations

Portions of Murfreesboro near the West Fork Stones River and the Stones River mainstem fall within FEMA Special Flood Hazard Areas. Rapid development in the region has also altered stormwater runoff patterns, creating localized flood risks in some areas. ADU construction on flood-zone parcels requires:

• Elevation to or above the Base Flood Elevation (BFE)
• A floodplain development permit from the City of Murfreesboro's Engineering Department
• Compliance with Murfreesboro's floodplain management regulations

MTSU Rental Market

Murfreesboro's robust rental market — driven by MTSU enrollment and an influx of Nashville-area workers seeking lower housing costs — makes ADUs a financially viable investment for many property owners. The city's Planning Department can advise on owner-occupancy requirements, rental licensing, and any short-term rental (STR) regulations that may apply to ADUs.

Permit Process

1. Verify zoning and HOA status — Confirm your zoning district and check for HOA CC&Rs
2. Contact Planning Department — Call (615) 893-6441 to discuss the specific requirements for your lot
3. Check flood zone status — Verify via FEMA's Flood Map Service Center
4. Prepare construction documents — Retain a licensed designer or architect for permit-ready plans
5. Submit building permit — Apply through Murfreesboro's Building and Codes Department
6. Inspections and CO — Pass required inspections and receive a Certificate of Occupancy

Contact Information

City of Murfreesboro Planning Department 111 W. Vine Street, Murfreesboro, TN 37130 Phone: (615) 893-6441 Website: murfreesborotn.gov/168/Planning

Murfreesboro Building and Codes Department 111 W. Vine Street, Murfreesboro, TN 37130 Phone: (615) 893-6611

Disclaimer: This page provides general information only and is not legal advice. Murfreesboro's zoning code is frequently updated given the city's rapid growth. Always verify current ADU regulations with the Murfreesboro Planning Department before making any development decisions.