12×24 Freestanding Pergola
A 12×24 open-lattice pergola spanning a full-length patio — framing drawings, cut list, and materials BOM.
7-day free trial, then $99 once. Framing drawings, cut list, and BOM for this exact pergola.
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.
