Many areas require a permit for structures over a certain size. Check your local building department.

How deep should posts be?

At least 24 inches deep or below your local frost line.

Best wood for a pergola?

Cedar and Redwood for rot resistance, or pressure-treated pine for budget-friendly durability.

intermediate

2-3 days

$800 - $1,500

How to Build a Pergola: Complete DIY Guide (2026)

Prepared by Lumberama's Building Projects Team

|Last updated May 26, 2026|Sources & methodology

A pergola transforms any backyard into an inviting outdoor living space with filtered shade and architectural beauty. Whether you want a freestanding structure or an attached extension, building a pergola is a rewarding project that adds real value to your property.

Key Takeaways

A pergola transforms any backyard into an inviting outdoor living space with filtered shade and architectural beauty.
Whether you want a freestanding structure or an attached extension, building a pergola is a rewarding project that adds real value to your property.
Check local building codes before starting.
Use a laser level for beam alignment.
Pre-drill bolt holes to prevent splitting.

Tools Needed

circular saw, miter saw, drill/driver, post hole digger, level, speed square, tape measure, clamps, ladder, socket wrench set

Materials List

6x6 posts (4), 2x8 beams (4), 2x6 rafters (10-14), 2x2 top slats (20-30), post bases or concrete mix, carriage bolts, lag screws, wood stain or sealer

Step-by-Step Instructions

Plan and Mark Layout

Determine pergola dimensions, check building codes, and mark post locations.

Set the Posts

Dig post holes 24 inches deep. Set 6x6 posts in concrete. Plumb and brace each post.

Install the Beams

Attach 2x8 beams to posts using carriage bolts, ensuring they are level.

Attach the Rafters

Cut 2x6 rafters with notches to sit over beams. Space at 12-16 inches on center.

Add Top Slats

Install 2x2 slats perpendicular to rafters, spaced 3-6 inches apart.

Finish and Seal

Sand edges, apply exterior wood stain or sealer, check all connections.

Recommended Species

Western Red Cedar, Redwood, Pressure-Treated Pine, Douglas Fir

Recommended Sizes

6x6 posts, 2x8 beams, 2x6 rafters, 2x2 slats

Pro Tips

Check local building codes before starting. Use a laser level for beam alignment. Pre-drill bolt holes to prevent splitting. Apply end-grain sealer to cut ends.