How Much Does a Deck Cost in Knoxville, TN?
If you’re planning a new deck in Knoxville, cost is usually the first question — and the honest answer is “it depends,” but not in a way that should leave you guessing. Deck pricing comes down to a handful of concrete factors: size, decking material, height off the ground, and how complex the design is. Here’s how to think through each one before you request an estimate.
1. Decking Material Is the Biggest Cost Driver
Pressure-treated wood is the most budget-friendly option and the most common starting point for Knoxville homeowners. Cedar costs more but resists rot and insects better without chemical treatment. Composite decking (Trex, TimberTech, and similar brands) costs the most upfront but eliminates the yearly staining and sealing that wood requires — over a 15-20 year span, the maintenance savings often close much of the price gap. We break down the real trade-offs on our composite decking page.
2. Size and Square Footage
This one’s intuitive — a 200 sq ft deck costs less than a 500 sq ft deck in the same material. But size isn’t just about the footprint; a deck built to hold a hot tub or outdoor kitchen needs reinforced framing regardless of square footage, which adds cost independent of size.
3. Height, Stairs, and Railings
A single-level deck a few feet off the ground is the simplest and least expensive build. Second-story and multi-level decks require engineered footings, additional support posts, and code-compliant stair and railing systems — all of which add labor and material cost. If your home sits on a slope (common in East Tennessee), this is often the difference between a straightforward build and one that needs more structural planning. See our multi-level deck page for what that looks like.
4. Permits and Knox County Code
Most new decks in Knox County require a permit, and skipping that step can cause real problems later — from failed home inspections to issues at resale. Permit costs and requirements vary by project scope, and a contractor who pulls permits on your behalf should factor that into your written estimate, not surprise you with it later.
5. Site Conditions
Uneven yards, tree roots, existing concrete or old structures that need removal, and difficult access for equipment can all add cost that isn’t obvious from a quick look at your yard. This is exactly why a proper estimate starts with an on-site visit rather than a phone quote.
Get an Exact Number, Not a Guess
General ranges only go so far — the only way to know what your specific project costs is a written estimate based on your yard, your material choice, and your design. We offer free on-site estimates for Knoxville, Farragut, Karns, Powell, Halls, and Fountain City homeowners, with pricing given in writing before any work starts.