What this covers
A pergola is an open structure: posts, beams across them, rafters across those and often slats on top for partial shade. It defines an outdoor room without closing it in. The builder anchors posts to concrete footings or to a patio with steel bases, sizes beams and rafters for the span so the top does not sag, and notches or caps the rafter tails for the look chosen. Cedar, treated wood, fiberglass and aluminum are all used; a louvered or retractable canopy top can add rain cover. A pergola attached to the house is flashed where its ledger meets the wall.
When to call
- A patio or deck that is too sunny to use at midday.
- An outdoor dining area that wants a sense of enclosure.
- A place to grow vines or hang lights and fans.
What to expect
- DesignSize, height, material, rafter detail and shade coverage are decided and drawn.
- FootingsFootings are poured or post bases anchored to the existing slab or deck framing.
- BuildPosts are set plumb, beams and rafters fastened, and slats or the canopy installed.
- FinishStained, painted or left to weather, with lighting added by a licensed electrician if wanted.
Get a certified company
Look up a certified company by ZIP code. Every company's license, insurance and trades are verified before it is listed, and placement is never paid.
Questions people ask
Does a pergola keep off rain?
An open-slat top does not. A louvered top, a polycarbonate panel roof or a retractable canopy can be added if rain cover matters.
Can it go on my deck?
Yes, if the deck framing can carry the posts. The builder adds blocking or posts down to footings below where the deck alone is not enough.
Does a pergola need a permit?
Many jurisdictions require one above a certain size or when attached to the house. The company checks the local rule.
Related: Gazebo building · Paver patios · Lighting installation · All decks, porches and outdoor living
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