How to Build a Pergola

6 steps 24h 0min Intermediate From $56

A pergola defines outdoor space with shade. DIY 10x10 is $1000-1500 in materials vs $3000-5000 pro. Posts + beams + rafters + cross-pieces.

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Step-by-Step Instructions

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Step 1: Plan size + location

10x10 is standard. Bigger needs more posts. Check setback rules — some areas treat pergola as structure.

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10x10 = 4 posts (corners only)

Standard residential. Stable, looks proportional.

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Check city setback rules

Some areas require 5+ ft from property line.

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Step 2: Get cedar lumber (best for outdoor)

Cedar resists rot naturally. Pressure-treated pine is cheaper but needs paint. Posts 6x6, beams 2x10, rafters 2x8.

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Cedar 6x6 posts (8 ft)

Solid foundation. ~$60 each.

$60
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Cedar 2x10 beams (10 ft)

Top horizontal across posts. ~$35 each.

$35
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Cedar 2x8 rafters

Cross the beams every 16". ~$25 each.

$25
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Step 3: Dig footings + set posts

Same as deck — below frost line, concrete, post anchors. Pergola posts visible above grade, so use galvanized post anchors.

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Simpson Strong-Tie post bases (galvanized)

Above-ground anchor for visible posts. ~$30 each.

$30 View Details
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Quikrete + sonotube footings

Same as deck footings.

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Step 4: Attach beams across posts

Beams sit on top of posts. Bolts through. Beam sandwich style (one each side of post) is most stable.

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Sandwich style (2 beams, one each side)

Bolts go through both beams + post.

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1/2" galvanized through-bolts

Lifetime fasteners. ~$5 each.

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Step 5: Install rafters across beams

Notch rafters to sit on beams or use joist hangers. Rafters every 16" on center.

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Notched rafters (traditional)

Notch in rafter sits over beam. Looks pro.

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Hurricane ties for wind resistance

Metal connectors at each rafter-to-beam joint. ~$1 each.

$1 View Details
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Step 6: Add cross-pieces (slats) for shade

1x4 or 2x2 cross-pieces every 6-12" across rafters. More slats = more shade. Optional but defines pergola look.

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2x2 cross-slats at 6" spacing

Roughly 40% shade. Standard pergola coverage.

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Skip cross-slats for full sun

Open pergola for vines to grow.

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