Start with how you'll use it. A table for four needs about a 10×10 ft area, a table for six about 12×12 ft, a grill station about 5×6 ft, and two lounge chairs about 6×8 ft. Most Louisville families who want to dine and grill end up with a 12×16 to 16×20 ft deck. Make the deck at least 10–12 feet deep from the house so chairs can be pulled out without hitting the railing.
The most common regret we hear about decks isn't the material or the color. It's "we wish we'd made it bigger" or "it's always crowded around the table." Sizing a deck is easy once you start from the furniture and work outward.
Here's how much space common furniture needs, including room to walk around it and pull chairs out.
| Use | Space needed |
|---|---|
| Bistro table for 2 | About 6×6 ft |
| Dining table for 4 | About 10×10 ft |
| Dining table for 6 | About 12×12 ft |
| Dining table for 8 | About 12×16 ft |
| Grill with prep space | About 5×6 ft |
| Two lounge chairs | About 6×8 ft |
| Sofa-style seating set | About 10×12 ft |
| Hot tub with access | About 10×10 ft or more |
| Walkway to the stairs or door | 3–4 ft wide |
Add up the zones you want, then add a walkway from the door to the stairs that doesn't cut through the dining area.
| Deck size | Square feet | What fits |
|---|---|---|
| 10×12 | 120 | Table for 4, or a grill and two chairs |
| 12×12 | 144 | Table for 6, tight with a grill |
| 12×16 | 192 | Table for 4–6 plus a grill |
| 14×20 | 280 | Dining plus a small seating area |
| 16×20 | 320 | Dining, grill and lounge seating |
| 20×24 or larger | 480+ | Entertaining space, often split into two levels |
Lumber and most composite boards come in 2-foot length increments. A 12×16 deck uses material efficiently. A 13×17 deck wastes the extra off nearly every board, so it often costs about the same as the next size up.
Every extra square foot adds cost, so size the deck to how you'll really use it. In Louisville, pressure-treated decks typically run $20–$35 per square foot installed and composite $45–$70, including framing, decking and standard railing. Stairs and railing upgrades are extra. A 12×16 wood deck lands very differently than a 16×20 composite deck. The full breakdown is in our deck cost guide.
Our online deck designer lets you type in a size like 12×16 or 16×20 and see it in 3D, with railing, stairs, a hot tub or a roof. A low-tech option works too: lay out a garden hose or painter's tape in the yard, set your patio table and chairs inside it, and walk around.
12×16 feet (192 square feet) is one of the most common deck sizes. It fits a dining table for four to six plus a grill. 16×20 feet is common for families who also want a lounge or seating area.
At least 10 feet from the house for a small table, and 12 feet or more for a table for six. Anything shallower than 8 feet works only as a walkway or a spot for a couple of chairs.
Plan for the tub's footprint, about 7×7 to 8×8 feet for most models, plus at least 2–3 feet of walking space on the sides you'll use. A hot tub also needs a deck framed specifically for its weight when filled, which has to be designed in from the start.
No. A deck that's too big for the house looks out of scale, costs more to build and maintain, and can shade the yard. Two smaller zones, like a dining level and a lower lounge level, often work better than one huge platform.
Ruth Fence and Deck is a family-owned deck builder serving Louisville KY and Southern Indiana for 15 years. Every project starts with a free in-person visit.
📞 Call (502) 468-3335 Design Your Deck Online