What are the tiny house laws in Tennessee?

You can build a permanent tiny home legally in Tennessee through the state program¹. The State Fire Marshal’s Office inspects preassembled permanent homes delivered as completed units through its Modular Building Program¹. Tennessee’s program covers homes built off-site on a chassis and homes installed on permanent foundations¹. Inspected homes receive a decal showing compliance with adopted state building and electrical codes¹.

State inspection does not decide whether you can live on a particular Tennessee lot¹. Local zoning can separately control where you place the home and whether you can live in it¹. Before you order, ask your local zoning office whether your proposed home is allowed at the parcel address.

Tennessee’s state residential program uses the 2018 International Residential Code with amendments³. It applies where your local government neither enforces a qualifying local code nor opts out³. Local governments enforce their own additional code requirements³. Ask the State Fire Marshal’s Office which building office serves your address⁵.

Tennessee’s statewide minimum total dwelling size remains unconfirmed. Ask your building office about floor area, lofts and the code rules for your design. Ask your local zoning office separately about minimum dwelling size and approval for an accessory dwelling. Tennessee’s state building permit does not give you zoning approval³. You need that separate land-use answer for a second home on an occupied lot.

Your Tennessee tiny home can qualify for the permanent-home inspection program if it is built on a chassis¹. The program covers preassembled permanent residences delivered as completed units¹. Tennessee’s statewide permission for long-term RV occupancy on private land remains unconfirmed. Ask your local zoning office whether it treats your proposed wheeled home as a dwelling or an RV.

HUD-labeled manufactured homes follow a separate Tennessee installation process⁶. You need a licensed installer and an installation decal after setup for those homes⁶. You do not need a state residential building permit merely to place a manufactured or modular home⁶. Custom additions, site-built decks, porches and stoops need a Manufactured/Modular Site Work Permit under Tennessee’s state program⁶. Before you pay a deposit, ask the State Fire Marshal’s Office which process fits your exact model.

You need a septic construction permit if your Tennessee tiny house will use a new septic system⁴. A conventional-system permit costs $400 for design flow up to 1,000 gallons per day⁴. A new alternative-system permit costs $500 at that same flow threshold⁴. You pay a separate construction inspection charge beyond those permit fees⁷.

TDEC evaluates your site and may ask for a detailed site plan or soil mapping⁴. Your installer arranges the final inspection before covering the system⁴. Plan sewage disposal before you start dirt work or prepare the building pad⁴. Qualifying Tennessee utilities can require sewer connection if your residential parcel abuts a public way containing a sanitary sewer⁸. Ask the utility serving your parcel about connection before you choose septic.

You need separate answers about zoning, septic, electrical and floodplain requirements beyond Tennessee’s state building permit³. Give your zoning office the parcel address, proposed floor plan and intended permanent use. Ask for a written answer about placing that specific home on that lot. Then ask the State Fire Marshal’s Office which inspection process and building office apply⁵.

Budget for your building permit and wastewater approval. Under Tennessee’s state residential permit fee schedule, construction valued from $5,001 to $100,000 has a $350 building permit fee where that schedule applies⁹. The schedule adds a $100 plumbing and HVAC inspection fee for new construction⁹. Ask the issuing office how much you will pay in total for your design. If your home will use septic, arrange the evaluation before earthwork⁴.