A pergola or patio cover is a structure, not a product. It carries dead load, wind load and often lighting and fans, it usually needs footings, and in most Southern California jurisdictions anything over 120 square feet or attached to the house requires a permit and an inspection. Prices run from about $9,500 for a straightforward wood pergola to $18,000-$40,000 for an aluminium louvered system depending on span. The contractor should hold a B General Building licence, produce an engineered detail for the footings and connections, and be willing to show you the permit. Anything less and you own the liability.
Licence, Permit and Engineering
Verify **B General Building** on cslb.ca.gov, plus active status, the $25,000 bond and workers' comp. Ask whether the structure will be permitted and who applies. Attached covers, structures over the size threshold, and anything with electrical almost always require a permit; detached open pergolas sometimes do not, but your city decides, not the salesman. Ask for the engineering. Manufactured louvered systems ship with an ICC-ES evaluation report and engineered span tables, and the contractor should hand you the sheet that matches your span and post spacing. Site-built wood covers usually need a stamped detail showing footing size, post base, beam size and the ledger connection if attached. In Hollywood Hills and other hillside areas the Baseline Hillside Ordinance 184,802 can affect what you may add and where.
Pro Tip
Ask for the engineered span table page that matches your actual beam span, not a generic brochure.
Red Flags on Patio Cover Quotes
Posts set on an existing patio slab with no footings. A four-inch slab was never poured to carry a point load, and a 20-foot span in a Santa Ana wind event will find that out. No footing size or depth in the proposal. Attached covers with no ledger flashing detail, which is how water gets behind stucco. Bare aluminium described as powder coated with no coating spec or warranty document. Lighting and fans quoted without a licensed electrical trade or permit. A deposit above $1,000 or 10% of the contract, whichever is less. Same-day pricing pressure, which is endemic in the patio cover trade. And no written wind rating, when coastal Malibu and canyon lots in Calabasas both see loads a generic kit never contemplated.
Pro Tip
Existing patio slabs almost never support new posts. Expect saw-cut footings, and expect them itemised.
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What a Real Proposal Contains
Structure type and finished dimensions, projection and height. Post count, post size and footing schedule with diameter and depth. Beam and rafter sizes for wood, or the extrusion profile and gauge for aluminium. Attachment method: freestanding or ledger-attached with flashing detail. Coating: powder coat spec and the coating warranty term separate from the labour warranty. Louvre operation, motor brand and remote or app control if louvered, and the drainage path, because good louvered systems drain through the posts. Electrical: circuits, fixture count, fan blocking, and Title 24 compliance for exterior lighting. Then price context: about $9,500 and up for wood, $18,000-$40,000 for aluminium louvered by span, with cantilevers and integrated heaters adding meaningfully. Permit and engineering costs should be listed as their own line, not buried.
Pro Tip
Powder coat warranties and workmanship warranties are different documents. Ask for both in writing.
Questions to Ask Before You Sign
Is this permitted, and will you pull it under your licence. What size and depth are the footings, and how do you handle an existing slab. What is the engineered wind load for my location. If louvered, who services the motors in five years, and are parts stocked domestically. What is the finish warranty against fade and chalking, and is it prorated. How is the ledger flashed into my stucco or siding, and who repairs it if it leaks. Are the crews employees or subs, and are the subs licensed and covered. How long is the install, and what happens to my landscaping and irrigation during it. Ask for two local addresses. Aluminium looks perfect on day one; you want to see a five-year-old one in the same sun exposure as yours.
Pro Tip
Confirm parts availability before choosing a louvered brand. An orphaned motor makes the whole roof decorative.
Final Thoughts
Treat a patio cover like the structural work it is. Verify the B licence and insurance, demand footings and engineering in writing, confirm the permit, and separate the finish warranty from the labour warranty. RYV builds shade structures across Los Angeles, the Valley, the South Bay and Orange County with our own crews, and every cover we install is engineered and permitted for the site it sits on.
Frequently Asked Questions
Usually yes if the structure is attached to the house, exceeds the local size threshold, or carries electrical. Detached open pergolas under the threshold are sometimes exempt, but the jurisdiction decides. Ask the contractor to confirm with your city in writing and to pull the permit under their own licence, not yours.
Wood pergolas start around $9,500 for a modest freestanding structure. Aluminium louvered systems typically run $18,000 to $40,000 depending on span, post count, motorisation and integrated lighting or heaters. Cantilevered designs and long unsupported spans sit at the top of that range because the structure has to be heavier.
Rarely. A typical four-inch patio slab was not designed for concentrated point loads or uplift. Proper installs saw-cut the slab and pour footings sized by the engineering, then patch. If a quote has no footing schedule, that cost has been removed and the structure's wind performance is unverified.
Three separate ones: the manufacturer's structural and finish warranty on the extrusions and powder coat, the motor and control warranty, and the contractor's workmanship warranty on the installation and footings. Ask for all three documents before signing and check whether the finish warranty is prorated by year.
