Start with what goes under the roof
Furniture—not the catalog size—should drive the first estimate. Measure the dining table, lounge grouping, grill or outdoor kitchen, then add comfortable circulation around it. A pergola that technically covers the furniture can still feel cramped if chairs cannot pull back or people cannot walk around them.
Common size bands
| Nominal size | Often suited to |
|---|---|
| 10×10 | Compact seating or a small dining zone |
| 10×12/13 | Dining table, conversation group or flexible medium patio |
| 10×16 | Larger dining or combined cooking/seating |
| 10×20 | Long dining/lounge layouts or outdoor-kitchen combinations |
| 12/13×20+ | Larger entertaining zones or multiple uses |
Nominal size is not the whole footprint
Check the manufacturer’s actual outside dimensions and post locations. A “10×13” label may not mean the same thing across brands. Also measure roof overhangs, gutter projections, door swings, eaves and nearby utilities.
Site constraints to verify
- Post and footing locations
- Concrete or deck dimensions
- Deck structural capacity where applicable
- House eaves, doors and windows
- Property setbacks and easements
- Utility clearances
- Local permit requirements
PergolaBuyer does not determine whether a deck, slab or footing is structurally adequate. Verify that with the appropriate qualified professional.
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