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
| 12x16 ft Classic Flat-Roof Pergola Plan | 12x16 ft Classic Flat-Roof Pergola Plan (White Oak) | |
|---|---|---|
| Category | Pergolas | Pergolas |
| Style | Classic Flat-Roof | Classic Flat-Roof |
| Footprint | 12x16 ft (192 sq ft) | 12x16 ft (192 sq ft) |
| Wood species | Composite (Trex / Azek) | White Oak |
| Roof finish | open lattice rafters | clear EPDM membrane |
| Difficulty | Advanced | Advanced |
| Build time | ~98 hrs | ~75 hrs |
| Materials cost | $10,325–$16,125 | $6,650–$10,400 |
| Footing depth | 36″ × 4 posts | 36″ × 4 posts |
| Concrete | 8 × 60-lb bags | 8 × 60-lb bags |
| Cut-list items | 5 | 5 |
| Build steps | 11 | 11 |
Cost & budget
The 12x16 ft Classic Flat-Roof Pergola Plan lands in the $10,325–$16,125 range for materials in Composite (Trex / Azek), while the 12x16 ft Classic Flat-Roof Pergola Plan (White Oak) runs $6,650–$10,400 in White Oak. The second plan is approximately 55% more expensive at typical 2026 lumber-yard pricing — driven mostly by the choice of Composite (Trex / Azek) over White Oak and the difference in cubic concrete volume between 4 and 4 footings.
Labor & difficulty
At ~98 hours, the 12x16 ft Classic Flat-Roof Pergola Plan is rated Advanced. The 12x16 ft Classic Flat-Roof Pergola Plan (White Oak) takes ~75 hours and is rated Advanced. The labor delta is roughly 23 hours, or one extra working day on the 12x16 ft Classic Flat-Roof Pergola 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 192 sq ft vs 192 sq ft, you are choosing between a generous patio cover and a generous patio cover. Allow at least 24 inches of clearance on every side for furniture and walking paths — that means the 12x16 ft Classic Flat-Roof Pergola Plan needs a clear area of approximately 16×20 ft and the 12x16 ft Classic Flat-Roof Pergola Plan (White Oak) needs 16×20 ft.
Material & durability
The 12x16 ft Classic Flat-Roof Pergola Plan is built from Composite (Trex / Azek), while the 12x16 ft Classic Flat-Roof Pergola Plan (White Oak) calls for White Oak. 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, these two plans are close in cost and effort — your choice comes down to style and footprint. 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 12x16 ft Classic Flat-Roof Pergola Plan page and the complete 12x16 ft Classic Flat-Roof Pergola Plan (White Oak) page. Both ship with full cut lists, hardware schedules, footing specs, and step-by-step build instructions.