Cost guide · updated October 2026
Patio Cover and Pergola Cost in Walnut Creek
Expect about $18–$55+ per square foot for an aluminum patio cover, $30–$65+ for a custom wood pergola and $45–$125+ for a louvered pergola, installed. For a 12×20 patio that works out to roughly $4,320–$13,200+, $7,200–$15,600+ and $10,800–$30,000+. Real quotes can land below or above these ranges.
Cost per square foot by type
| Cover type | Installed, per sq ft | Source |
|---|---|---|
| Solid aluminum | $20–$50+ | Pacific Pavers, Orange County, Feb 2026 |
| Wood-grain aluminum (solid or lattice) | $18–$55+ | Pacific Pavers |
| Heavy-gauge “modern” aluminum | $35–$75+ | Pacific Pavers |
| Louvered pergola, manual | $45–$110+ | HomeGuide, Feb 2026 |
| Louvered pergola, motorized | $55–$125+ | HomeGuide |
| Motorized louvered roof (premium) | $100–$160+ | Pacific Pavers |
| Custom wood pergola | $30–$65+ | HomeGuide, updated Oct 2024 (dated) |
| Prefab pergola kit, installed | $10–$40+ | HomeGuide |
Common sizes, worked out
Area × the per-square-foot range. Louvered figures for 12×12, 12×20 and 20×20 come straight from HomeGuide's size table (manual low to motorized high).
| Size | Area | Aluminum ($18–$55+) | Custom wood ($30–$65+) | Louvered |
|---|---|---|---|---|
| 10×20 | 200 sq ft | $3,600–$11,000+ | $6,000–$13,000+ | $9,000–$25,000+ (200 × $45–$125+) |
| 12×12 | 144 sq ft | $2,592–$7,920+ | $4,320–$9,360+ | $6,500–$18,000+ |
| 12×20 | 240 sq ft | $4,320–$13,200+ | $7,200–$15,600+ | $10,800–$30,000+ |
| 20×20 | 400 sq ft | $7,200–$22,000+ | $12,000–$26,000+ | $18,000–$50,000+ |
What moves the price
- How it attaches: a wall ledger is simplest; eave or roof brackets add parts and roofing work; freestanding adds two or more footings.
- Footings and soil: hillside lots, expansive clay and long spans call for bigger or deeper footings, sometimes engineered.
- Engineering and drawings: covers that need a permit usually need drawings, and larger or freestanding ones may need calculations.
- Permits: plan check and inspection fees, plus the installer's time to pull the permit.
- Electrical: lights, fans, heaters and motors need circuits, sometimes a panel upgrade, and an electrical permit.
- Motorization and sensors: the biggest jump on louvered systems.
- Screens and shades: especially on west-facing patios where the late sun comes in low from the side.
- Fire-zone materials: fire-retardant-treated lumber costs more than standard lumber; aluminum already qualifies.
- HOA fees: Blackhawk's review fees range from $50 up to $550 by project type, with deposits “generally around $2,000” (Blackhawk ARC form).
- Removing an old cover or repairing the slab before installation.
- The same size and roof styleArea, height, solid vs lattice vs louvered, panel thickness or gauge.
- StructurePost and beam sizes, footing size and depth, how it attaches.
- What's includedPermits, drawings, electrical, gutters, haul-away, HOA paperwork.
- Warranty and paymentsManufacturer vs workmanship warranty; down payment no more than $1,000 or 10%, whichever is less (CSLB).
Questions homeowners ask
How much does a 20×20 patio cover cost?
About $7,200–$22,000+ in aluminum, $12,000–$26,000+ as a custom wood pergola, and $18,000–$50,000+ as a louvered pergola (HomeGuide, manual to motorized). Electrical, engineering, permits and HOA fees are extra.
What is the average cost of a patio cover?
There isn't a useful single average, because size and type swing it so much. HomeGuide's average for a louvered pergola is $6,500–$18,000+; Pacific Pavers puts a typical 200 sq ft aluminum cover at $10,000–$22,500+. Price your own size with the per-square-foot table.
Why are my quotes so far apart?
Usually because they aren't quoting the same thing: different roof style or gauge, attached vs freestanding, footing size, whether permits and electrical are included, and warranty terms. Line them up with the checklist on this page.
Is a pergola cheaper than a patio cover?
A prefab pergola kit is the cheapest option ($10–$40+ per sq ft installed). A custom wood pergola ($30–$65+) usually costs more than a basic aluminum lattice or solid cover ($18–$55+), and a louvered pergola costs the most.
Sources
- Pacific Pavers — Aluminum patio cover cost per square foot (Orange County, February 2026)
- HomeGuide — How much does a louvered or motorized pergola cost? (February 2026)
- HomeGuide — How much does a pergola cost? (updated October 2024)
- Blackhawk HOA — Architectural Review application form (PDF)
- CSLB — What a home improvement contract must include
Checked October 2026. Rules and prices change; confirm with the agency or installer before you rely on them.
Ready to price your patio cover?
Tell us the size and the type you are leaning toward. A local installer can measure, quote and handle permits.