Custom Wood Pergolas in Walnut Creek

Design choices that change the shade

• Attached or freestanding: attached pergolas use a ledger on the house; freestanding ones stand on four or more posts and can go anywhere in the yard, like over a fire pit or at the end of the lawn.
• Rafter spacing and depth: rafters 12 to 16 inches apart with purlins across the top give noticeably more shade than widely spaced rafters. Orienting rafters to the afternoon sun matters as much as spacing.
• Tops: shade cloth, reed screens or clear polycarbonate panels add shade or rain cover. A solid top turns the pergola into a roofed structure, which affects the permit.

Lumber

Redwood and western red cedar are the traditional choices in the Bay Area for their natural decay resistance and color; pressure-treated Douglas fir costs less and takes paint or solid stain. Heavy timbers look right on a big pergola, but post, beam and rafter sizes come from the span, not taste: ask for the member sizes and footing details in writing.

Finishes and upkeep

Expect to clean and re-coat a stained pergola every few years, check post bases for standing water, and re-tighten hardware as the wood dries. Keeping vines thinned helps the wood dry after rain.

Permits

Walnut Creek exempts unenclosed lattice patio structures 10 feet high or less. In unincorporated areas like Alamo and Blackhawk, Contra Costa County exempts trellises, arbors and pergolas with no solid roof and no more than 120 sq ft of roof area, though setbacks, height limits and easements still apply (County guide). Full permit guide.