Deck Building Cost in Nashville (2026)

Yes, a permit from the Metro Nashville Department of Codes Administration is required for any deck that is more than 30 inches above the ground (grade) or attached to the house.

Permit fees in Nashville typically range from $150 to $700, depending on the project's valuation and complexity. For example, a $12,000 project valuation usually incurs a base building permit fee of approximately $91 plus additional trade fees.

In 2026, pressure-treated wood decks cost between $15 and $35 per sq ft installed, while mid-range composite decks like Trex range from $25 to $70 per sq ft. While composite is roughly 2x the upfront cost, it saves an estimated $300–$500 annually in maintenance.

The permit approval process through Metro Codes typically takes 2 to 4 weeks. Once approved, the actual construction of a standard 200–300 sq ft deck usually takes 1 to 3 weeks depending on weather and complexity.