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
| 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) | 18x18 ft Drop-Down Awning Sail Shade Sail Frame Plan | |
|---|---|---|
| Category | Shade Sail Frames | Shade Sail Frames |
| Style | Drop-Down Awning Sail | Drop-Down Awning Sail |
| Footprint | 16x16 ft (256 sq ft) | 18x18 ft (324 sq ft) |
| Wood species | Cypress | Pressure-Treated Pine |
| Roof finish | tensioned 320-gsm shade sail fabric | tensioned 320-gsm shade sail fabric |
| Difficulty | Advanced | Advanced |
| Build time | ~53 hrs | ~155 hrs |
| Materials cost | $3,450–$5,375 | $3,075–$4,825 |
| Footing depth | 48″ × 4 posts | 48″ × 4 posts |
| Concrete | 12 × 60-lb bags | 12 × 60-lb bags |
| Cut-list items | 4 | 4 |
| Build steps | 9 | 9 |
Cost & budget
The 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) lands in the $3,450–$5,375 range for materials in Cypress, while the 18x18 ft Drop-Down Awning Sail Shade Sail Frame Plan runs $3,075–$4,825 in Pressure-Treated Pine. The second plan is approximately 12% more expensive at typical 2026 lumber-yard pricing — driven mostly by the choice of Cypress over Pressure-Treated Pine and the difference in cubic concrete volume between 4 and 4 footings.
Labor & difficulty
At ~53 hours, the 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) is rated Advanced. The 18x18 ft Drop-Down Awning Sail Shade Sail Frame Plan takes ~155 hours and is rated Advanced. The labor delta is roughly 102 hours, or one extra working day on the 18x18 ft Drop-Down Awning Sail 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 256 sq ft vs 324 sq ft, you are choosing between a full outdoor room and a full outdoor room. Allow at least 24 inches of clearance on every side for furniture and walking paths — that means the 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) needs a clear area of approximately 20×20 ft and the 18x18 ft Drop-Down Awning Sail Shade Sail Frame Plan needs 22×22 ft.
Material & durability
The 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) is built from Cypress, while the 18x18 ft Drop-Down Awning Sail Shade Sail Frame Plan calls for Pressure-Treated Pine. 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, 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) is the faster build. 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 16x16 ft Drop-Down Awning Sail Shade Sail Frame Plan (Cypress) page and the complete 18x18 ft Drop-Down Awning Sail Shade Sail Frame Plan page. Both ship with full cut lists, hardware schedules, footing specs, and step-by-step build instructions.