If you have narrowed your shortlist to two specific designs, this is exactly the kind of decision where a side-by-side spec view saves a weekend of second-guessing. Both plans below are complete, code-aware DIY builds, but they differ on the things that matter for a backyard project — total cost, raw labor hours, footprint, and the wood species on the cut list.
Side-by-side specs
| 12x12 ft Cantilever Single Post Shade Sail Frame Plan | 10x8 ft Horizontal Slat Privacy Screen Trellis Plan | |
|---|---|---|
| Category | Shade Sail Frames | Privacy Screen Trellises |
| Style | Cantilever Single Post | Horizontal Slat |
| Footprint | 12x12 ft (144 sq ft) | 10x8 ft (80 sq ft) |
| Wood species | Redwood | Black Locust |
| Roof finish | tensioned 320-gsm shade sail fabric | open-top (no roof) |
| Difficulty | Advanced | Advanced |
| Build time | ~160 hrs | ~156 hrs |
| Materials cost | $2,350–$3,650 | $1,250–$1,975 |
| Footing depth | 48″ × 4 posts | 36″ × 4 posts |
| Concrete | 12 × 60-lb bags | 8 × 60-lb bags |
| Cut-list items | 4 | 4 |
| Build steps | 9 | 9 |
Cost & budget
The 12x12 ft Cantilever Single Post Shade Sail Frame Plan lands in the $2,350–$3,650 range for materials in Redwood, while the 10x8 ft Horizontal Slat Privacy Screen Trellis Plan runs $1,250–$1,975 in Black Locust. The second plan is approximately 86% more expensive at typical 2026 lumber-yard pricing — driven mostly by the choice of Redwood over Black Locust and the difference in cubic concrete volume between 4 and 4 footings.
Labor & difficulty
At ~160 hours, the 12x12 ft Cantilever Single Post Shade Sail Frame Plan is rated Advanced. The 10x8 ft Horizontal Slat Privacy Screen Trellis Plan takes ~156 hours and is rated Advanced. The labor delta is roughly 4 hours, or one extra working day on the 12x12 ft Cantilever Single Post Shade Sail Frame Plan. Both plans require the same skill level, so the deciding factor is footprint and aesthetics rather than your comfort with carpentry.
Footprint & site fit
At 144 sq ft vs 80 sq ft, you are choosing between a generous patio cover and a focal-point garden structure. Allow at least 24 inches of clearance on every side for furniture and walking paths — that means the 12x12 ft Cantilever Single Post Shade Sail Frame Plan needs a clear area of approximately 16×16 ft and the 10x8 ft Horizontal Slat Privacy Screen Trellis Plan needs 14×12 ft.
Material & durability
The 12x12 ft Cantilever Single Post Shade Sail Frame Plan is built from Redwood, while the 10x8 ft Horizontal Slat Privacy Screen Trellis Plan calls for Black Locust. The species choice drives the cost delta and the maintenance schedule. Pressure-treated southern yellow pine is the cheapest and most rot-tolerant for in-ground posts; western red cedar is the DIY favorite for visible parts; redwood and white oak are heritage choices that command a premium.
Verdict
For a builder weighing these two specifically, 10x8 ft Horizontal Slat Privacy Screen Trellis Plan is the clear budget pick. If both fit your budget and yard, default to the design whose style language matches the rest of your house — a Craftsman bungalow looks awkward beside a modern slatted pergola, and vice versa.
Read each plan in full before committing: the complete 12x12 ft Cantilever Single Post Shade Sail Frame Plan page and the complete 10x8 ft Horizontal Slat Privacy Screen Trellis Plan page. Both ship with full cut lists, hardware schedules, footing specs, and step-by-step build instructions.