How Much Does It Cost to Build a Deck in St. Petersburg, FL?

"How much does a deck cost?" is almost always the first question we get on the phone, and it's a fair one — a new deck is a real investment, and homeowners deserve a straight answer instead of a vague "it depends." The honest truth is that it does depend, but not on mysterious factors. Once you know what drives the price, you can look at any quote and understand exactly why it landed where it did.

What Decking Material Costs Per Square Foot

In the St. Petersburg market, pressure-treated wood decking generally installs for about $15 to $25 per square foot, all in. That covers framing, footings, decking boards, and basic railing. If you're leaning toward a custom wood deck, this is the range to plan around for a straightforward, single-level design.

Composite decking costs more up front. Board materials alone typically run $5 to $14 per square foot, and once you add the labor and framing that goes with a properly built structure, fully installed composite and Trex decks in this region land somewhere between $30 and $50 per square foot. Labor is a big piece of either number — a local, licensed crew generally charges $10 to $14 per square foot for the framing and installation work alone, separate from materials.

Sample Price Ranges by Deck Size

To make those per-square-foot numbers concrete, here's roughly what homeowners in and around St. Petersburg are seeing for a simple, single-level deck at a few common sizes. Treat these as planning ranges, not a quote — your actual number depends on the specifics below.

• 200 sq ft deck: roughly $3,000–$5,000 in pressure-treated wood, or $6,000–$10,000 in composite.
• 300 sq ft deck: roughly $4,500–$7,500 in wood, or $9,000–$15,000 in composite.
• 400+ sq ft deck: roughly $6,000–$10,000 or more in wood, or $12,000–$20,000 or more in composite.

Notice how the gap between wood and composite widens as the deck gets bigger — that's simple math on the per-square-foot difference, not a sign that composite becomes a worse value at scale. If anything, the opposite is often true once you factor in maintenance, which we cover in our composite vs. wood comparison.

What Actually Moves Your Quote Up or Down

Two 300 square foot decks can come in thousands of dollars apart, and it almost never comes down to the contractor padding the number. A few things do most of the heavy lifting:

Height and Footings

A deck that sits a few inches off the ground needs far less structure than one that's elevated several feet, which requires deeper footings, taller posts, stairs, and often additional engineering. Elevated and pool-adjacent decks — the kind we build a lot of through our multi-level and pool deck work — cost more per square foot than an at-grade patio deck simply because there's more structure holding it up.

Railings and Add-Ons

Basic wood or composite balusters are the least expensive railing option. Cable rail, glass panels, and premium composite rail systems all add cost. Screening, a roof or pergola cover, built-in seating, and lighting are all worthwhile upgrades, but each one is a line item on top of the base deck.

Permits and Engineering

Any attached or elevated deck in Pinellas County needs a permit, and larger or more complex designs often need engineered plans. That's a real cost, but skipping it isn't a shortcut worth taking — we walk through why in our guide to deck permit requirements in Pinellas County.

Site Access and Existing Conditions

Tight side-yard access, existing concrete that needs removal, or a slope that needs grading all add labor time. This is one reason an in-person estimate always beats a phone-quote guess — every St. Petersburg lot is a little different.

Wood vs. Composite: Thinking Past Day One

It's tempting to compare wood and composite purely on the sticker price, but that only tells half the story in a climate like ours. Wood needs regular sealing and staining to hold up against St. Pete's sun and humidity, and those costs add up over the years. We break down the real 15-year cost picture, including maintenance, in our full composite vs. wood decking comparison — it's worth a read before you lock in a material choice.

Getting an Accurate Quote for Your St. Petersburg Home

Every lot is different, which is exactly why we don't quote sight-unseen. Whether you're in St. Petersburg proper or anywhere else in the county, we'll come measure your space, talk through material and layout options, and hand you a written estimate with no pressure and no obligation. Understanding the ranges above just means you'll walk into that conversation already knowing what's realistic for your project.