Altadena, CA · West San Gabriel Valley
Deck & patio prices in Altadena, CA: 2026 ranges
A deck & patio in Altadena costs $30–$70 per sq ft for deck and $13–$43 per sq ft for patio, with a typical mid-size deck or patio running $10k–$27k. Small projects start around $4k; large or high-end work can reach $60k or more.
As of 2026, costs in Altadena run about 8% above the LA County baseline due to Eaton Fire rebuilds and LA County rebuild permitting.
Updated
Deck & Patio Cost by Size in Altadena
Totals adjusted for the Altadena market (1.08× LA County baseline). Ranges include labor, materials, permits, and contractor overhead.
| Size | Type | Range | Low | High |
|---|---|---|---|---|
| Small | Patio or small deck | 100–200 sq ft | $4k | $11k |
| Medium | Deck or covered patio | 250–450 sq ft | $10k | $27k |
| Large | Multi-level or pergola + patio | 500+ sq ft | $24k | $60k |
What Affects Deck & Patio Cost in Altadena?
- Material (concrete vs pavers vs composite deck).
- Permit (decks over 30" need one).
- Cover or pergola.
- Drainage.
- Hillside / sloped site.
- Altadena market premium: local pricing reflects Eaton Fire rebuilds and LA County rebuild permitting, which shifts totals about 8% above the LA County baseline.
Get exact deck & patio bids in Altadena
Two or three licensed builders who work in Altadena, pricing the same scope.
Deck & Patio Sub-Type Comparisons
Concrete Patio vs Paver Patio
Concrete patios are the cheapest hard surface at $14–$20/sq ft but crack; pavers cost $25–$45/sq ft, allow individual repair, and add resale appeal in LA.
Composite Deck vs Wood Deck
Composite (Trex/TimberTech) costs $40–$75/sq ft and is maintenance-free for 25+ years; pressure-treated wood is $28–$45/sq ft but needs re-staining every 2–3 years in LA sun.
How to Get the Best Price on a Deck & Patio in Altadena
- Get line-itemized bids from two or three builders on the same scope; Altadena deck & patio pricing commonly varies 10–25% between contractors.
- Lock major materials and finishes before signing; mid-project change orders are the #1 cost driver on deck & patio jobs.
- Bid in shoulder seasons (Jan–Mar or Sep–Oct) when Altadena contractor schedules are open and rush premiums disappear.
- Verify CSLB license, insurance, and bond before paying any deposit. California caps deposits at $1,000 or 10% of contract, whichever is less.
What is a deck & patio?
A deck or patio project builds an outdoor living surface: a raised wood or composite deck, or a ground-level patio of concrete, pavers or stone, often with a cover or pergola.
How to get an accurate price
- 1.Write down the scope: size, any layout changes, the finish level, and who supplies fixtures and materials.
- 2.Get bids from two or three licensed builders who work in Altadena, all pricing that same deck & patio scope.
- 3.Line the bids up item by item. Check allowances, permits, exclusions, and whether overhead and profit are shown.
- 4.Before any deposit, check each builder's CSLB license and insurance. As of 2026, California caps a home improvement down payment at $1,000 or 10% of the contract, whichever is less, according to the Contractors State License Board.
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Questions about Deck & Patio in Altadena
How much does a deck & patio cost in Altadena, CA?
A deck & patio in Altadena costs $4k–$60k, with a typical mid-size deck or patio running $10k–$27k. Per-unit pricing falls in the $30–$70 per sq ft for deck and $13–$43 per sq ft for patio range.
Do I need a permit for a deck & patio in Altadena?
Yes for most scopes — LADBS or the local city building department requires permits any time you move plumbing, gas, electrical, or alter structure. Like-for-like cosmetic refreshes generally don't.
How long does a deck & patio take in Altadena?
Plan for 4–14 weeks of construction in Altadena depending on size and complexity, plus 2–8 weeks for design, permits, and material lead times.
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Get Matched with Licensed Altadena Contractors
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