12×24 Freestanding Pergola
A 12×24 open-lattice pergola spanning a full-length patio — framing drawings, cut list, and materials BOM.
Open this pergola in the 3D designer, change the footprint, post height and pitch, and price it as you go. The framing drawings, cut list and full quantities are $99 once, when you're ready to build.
Covered Area
288 sq ft
Post Layout
12′ × 24′ (post centerlines)
Post Height
9′
Roof Pitch
1/12
Design Wind
115 mph, Exposure B
About This Design
A 12×24 open-lattice pergola gives a patio enough length to split into a cooking zone and a separate seating area under one shade structure. It is freestanding — six-by-six posts on a poured pad, no attached wall — with the knee-braced connections and rafter sizing proven by the ADR 027 pergola engineering ruleset.
The longer span calls for the same rigorous post-to-beam load path as our smaller plans, just carried over more bays, so the cut list and BOM scale with the footprint instead of guessing at it.
Key Features
- 12×24 open-lattice roof on 6×6 posts
- Rafter tails and knee braces sized by the pergola engineering ruleset (ADR 027)
- Surface post foundation on a poured slab or existing pad
- Full cut list and materials BOM through the same framing engine as every plan
Build Notes
Set posts on a poured slab or an existing pad, then run the beams and rafters per the framing drawings. Knee braces at each post-to-beam joint are part of the load path, not decoration — do not omit them.
The BOM covers posts, beams, rafters, and hardware. Concrete for the pad is priced separately or supplied by others.
Best For
Right-sized for shading a patio, deck, or outdoor dining area. Want a solid roof instead of open lattice? See our carport plans.
Engineering Notes
The framing engine checks this pergola's posts, knee braces, footings and roof uplift at 115 mph, Exposure B — the ASCE 7 basic wind speed across most of the interior United States. It is not a stamped design: a higher wind zone, an open or coastal site, or a jurisdiction that asks for sealed drawings needs a local engineer to review it.
- Knee-brace force 1254 lb on the 4 width braces (transverse wind) at 115 mph Exp B — use 2 × 1/2" through-bolts at each brace end in one row along the brace, 2″ apart, 3.5″ from the brace end (1377 lb, single shear, wet-service wind).
Interactive 3D Preview
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Frequently Asked Questions
How much does a 12×24 pergola cost to build?
The materials estimate on this page is computed live from the plan's BOM: posts, beams, rafters and hardware. Concrete, footings by others, and any electrical are accessories outside the BOM.
Do I need a permit for a 12×24 pergola?
Freestanding accessory structures are frequently exempt below a jurisdiction's square-footage threshold, but setback and height rules still apply. Confirm with your local building department before building.
What materials are included in the 12×24 pergola plans?
The plans include framing drawings with a cut list and a materials BOM covering the posts, beams, rafters, purlins, fasteners and hardware, plus the interactive 3D preview. A freestanding pergola does not come with the multi-sheet printable permit plan set — that set draws a building's walls and foundation, which a pergola has none of. Bring the framing drawings to your building department if your jurisdiction requires a permit.
