Deck Building · Simpsonville, SC
Cost to Build a Deck in Simpsonville, SC
Decks in Simpsonville run $39–$92 per square foot built. A 16×20 pressure-treated deck (320 sq ft) lands around $12,385–$14,915; the same deck in composite with an upgraded rail runs about $18,942–$22,811.
Deck Building Cost by Scope
Computed from the same pricing engine as our calculators — run your own numbers to change size, materials or site conditions.
| Scope | Typical Cost | Size | What's Included |
|---|---|---|---|
| Pressure-treated, 320 sq ft | $12,385–$14,915 | 320 sq ft | Treated framing and decking, wood rail, one set of stairs. The most deck per dollar, with annual cleaning and periodic sealing. |
| Composite, 320 sq ft | $18,942–$22,811 | 320 sq ft | Treated frame with composite boards and an aluminum or composite rail. Costs more up front, gives back the sealing weekends. |
| Premium multi-level, 500 sq ft | $38,134–$45,924 | 500 sq ft | More than one level, wider stairs, integrated lighting, and built-ins such as benches or planters. |
What Moves the Price
- Square footage, which sets material volume and framing labor together.
- Decking material. Treated wood is the cheapest board on day one; composite costs more and removes the recurring maintenance.
- Height above grade. A deck a step down from the door is simple. A deck one storey up means longer posts, deeper footings and code-driven guard details.
- Railing. Linear feet of rail, and its material, is a larger share of a small deck’s budget than most homeowners expect.
- Stairs. Every run needs framing, treads, and usually a landing; two runs cost roughly twice one.
- Extras that read as small: lighting, privacy screening, benches, a pergola. Each is its own scope.
Composite or pressure-treated?
On a 320 sq ft deck the gap is roughly $12,385–$14,915 against $18,942–$22,811. Treated wood wins on first cost. Composite wins if you would rather not clean and seal every year or two, and it holds its appearance longer in Upstate sun. Both use a treated frame — the difference is what you walk on and hold.
Deck Building Questions
How much does a 16x20 deck cost in Simpsonville?
About $12,385–$14,915 in pressure-treated wood, or roughly $18,942–$22,811 in composite with an upgraded railing. Height above grade and stair count move both figures.
Do I need a permit to build a deck in Simpsonville?
Generally yes, for an attached deck or any deck above a minimal height. Greenville County Building Safety reviews footing depth, framing spans and guard height, and inspects before the decking covers the frame. Many Simpsonville subdivisions also require HOA approval of the design.
How long does a deck take to build?
Most single-level decks are two to three weeks from footings to final inspection, weather permitting. Multi-level decks with lighting and built-ins take longer.
Can you build a deck over an existing patio?
Sometimes. It depends on whether footings can be placed through or beside the slab and whether the resulting height still works with the door threshold. It is worth checking before assuming the slab saves money.
What is the cheapest way to add outdoor living space?
A ground-level treated deck, at $39–$47 per square foot, is the least expensive built structure. Screening it later costs less than building a screened porch from scratch, so a deck now can be a first phase rather than a compromise.
Permits & codes: Greenville County Building Safety · SC Building Codes Council
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