Cost to Build a Deck Los Angeles: 2026 Prices by Material and Height

For a typical Los Angeles-area project, most homeowners land somewhere in these installed ranges. They include framing, footings, decking, labor, and basic stairs, but not premium railings, lighting, or engineering for difficult sites.

• Small ground-level deck, 150 to 250 sq ft: roughly $9,000 to $25,000
• Mid-size ground-level or low deck, 300 to 450 sq ft: roughly $18,000 to $45,000
• Raised deck off a second story, 250 to 400 sq ft: roughly $35,000 to $80,000
• Engineered hillside deck on piers or caissons: roughly $60,000 to $150,000 or more

These are typical ranges that vary by scope, access, and site conditions. A flat backyard in Canoga Park with easy side-yard access will sit at the low end. A steep lot in Encino where every post needs a drilled pier will push well past the high end.

Deck cost per square foot is the easiest way to compare materials, as long as you compare decks at the same height. These typical Los Angeles-area ranges assume a ground-level or low deck with standard framing.

• Pressure-treated lumber decking: about $45 to $75 per sq ft installed
• Redwood or cedar decking: about $60 to $95 per sq ft
• Composite decking (capped boards): about $70 to $120 per sq ft
• PVC or premium capped composite: about $85 to $140 per sq ft
• Ipe or other tropical hardwood: about $90 to $150 per sq ft

The framing underneath is usually pressure-treated lumber no matter what goes on top, so the price gap between materials is mostly in the boards, fasteners, and labor time. Hardwood and some composites take longer to install because they need hidden clips or predrilled screws.

Lifetime cost matters too. Wood needs sealing every one to three years under Valley sun, while composite mainly needs cleaning. We cover heat, fading, and fire ratings in detail in our guide to composite vs wood decks.

Height is the biggest multiplier most people underestimate. Once a deck rises off the ground, you need taller posts, larger beams, lateral bracing, a full guardrail system, and longer stair runs. Labor slows down because crews work from ladders or scaffolding.

• Under 30 inches above grade: simplest framing, may not need a guardrail, lowest cost
• 30 inches to about 8 feet: guardrails required, more stairs, roughly 20 to 40 percent more than ground level
• Second-story height: heavier beams, engineered connections, often 40 to 70 percent more
• Deck over living space or a garage: requires a waterproof membrane and drainage, which adds significantly

If your deck will sit over a room or carport, the waterproofing detail is as important as the framing. That is closer to a roofing assembly, and our roofing and waterproofing team typically handles the membrane and flashing.

Hillside deck cost is driven by what happens below grade. On steep lots in Woodland Hills, Tarzana, Encino, Sherman Oaks, and Calabasas, standard concrete footings often are not enough. The structural engineer may call for drilled piers or caissons that go several feet into firm soil or bedrock.

• Geotechnical (soils) report: typically $3,000 to $8,000 depending on the site
• Structural engineering and calculations: typically $2,000 to $6,000
• Drilled piers or caissons: often $2,500 to $8,000 or more each, depending on depth and access
• Limited access surcharges: hand-carrying materials, small drill rigs, or crane time

Access is a hidden cost on many Valley hillside homes built in the 1950s and 60s. If a drill rig cannot reach the back of the lot, crews may need a smaller limited-access rig or hand-dug piers, which adds days. Retaining walls, drainage, and erosion control can also come into the scope when the slope is disturbed.

In the City of Los Angeles, hillside lots fall under additional review, and LADBS may require soils and geology reports before approving plans. Other cities like Calabasas, Agoura Hills, and La Canada Flintridge have their own building departments with similar slope requirements, so check with the city's building department early.

As a general rule, a deck that is more than 30 inches above grade or attached to the house needs a building permit. Small, freestanding, low decks may be exempt, but you should confirm with your building department before skipping a permit.

Deck permit cost Los Angeles homeowners pay is based largely on project valuation, so there is no single fee. For a simple ground-level deck, permit and plan check fees are often a small fraction of the total. For engineered hillside decks, the bigger costs are the drawings, soils report, and structural calculations needed to pass plan check, not the permit fee itself.

1. 1Design and drawings, plus engineering if the height or slope requires it
2. 2Plan check submittal to LADBS or your city's building department
3. 3Corrections and resubmittal, if the plan checker requests changes
4. 4Permit issuance and scheduling of construction
5. 5Inspections, typically footings or piers, framing, and a final

Fire zones add another layer. Many hillside neighborhoods sit in Very High Fire Hazard Severity Zones, where Chapter 7A ignition-resistant construction rules apply to decking. That narrows your material choices and can raise the price per square foot. If you also plan a roof over the deck, read our post on covered patio permits in Los Angeles. HOA approval, where it applies, can add a few weeks before you even submit to the city.

Railings are where many deck budgets quietly double. On an elevated deck with a long perimeter, the railing can cost as much as the decking. Price railings by the linear foot so you can compare bids accurately.

• Wood railings: about $60 to $120 per linear foot
• Composite railing systems: about $100 to $200 per linear foot
• Aluminum or cable railings: about $150 to $300 per linear foot
• Glass panel railings: about $250 to $500 per linear foot

Stairs add $150 to $400 or more per step depending on width, material, and whether they need a landing. Lighting is usually money well spent for safety and evening use.

• Low-voltage stair and post lighting: roughly $1,500 to $5,000
• Electrical outlets, heaters, or ceiling fans under a cover: priced by circuit and run length
• Pergola or solid patio cover over the deck: often $15,000 to $50,000 or more
• Built-in benches, planters, or privacy screens: priced by linear foot

In our projects, the decks that stay on budget are the ones where the big decisions are made before the first bid. Material, height, railing style, and electrical scope should all be on paper so every contractor prices the same deck.

• Get fixed-price proposals that list engineering, permits, and railings as separate lines
• Ask whether demolition and haul-away of an old deck are included
• Confirm who handles plan check corrections and how they are billed
• Simplify the shape, since angled corners and curves add labor
• Consider composite decking with a less expensive railing, or the reverse, to balance cost

RAA Construction Group has built outdoor living projects across Los Angeles and Ventura County for more than 15 years, and every deck we build carries a one-year workmanship warranty. You can see what a full project includes, from 3D renderings to final inspection, on our decks, patios, and outdoor living page, or schedule a free on-site estimate to get a fixed-price proposal for your yard.