Skip to content
Get $25 off when you sign up for the newsletter  Get Coupon
Get $25 off when you join the newsletter  Get Coupon

18x20 Pergolas

We offer a wide selection of 18x20 pergola kits, including both free-standing and house-attached kits, those with shade canopies and those made for a slatted wood roof, and some with smaller-sized posts & beams and others with larger ones. Use the filtering options below to quickly find the perfect 18' by 20' pergola for your backyard.

Please note that attached 18x20 pergolas are mounted to the house on the 18-foot side and come out 20 feet from the home. Click here to see pergolas that attach on the 20-foot side instead.

  SIMILAR SIZES:  16x20 pergolas  |  18x18 pergolas  |  18x22 pergolas  |  20x18 pergolas
  • Attached 18x20 Pergola Off House with Roof (6 Options) - Kit for 4x4 Wood

    Original price Starting at $999
    Original price Starting at $999
    Original price $999
    Starting at $799
    Starting at $999 $799
    Current price $799
    Original price $999
    20% Off

  • Freestanding 18x20 Pergola Kit with Roof (6 Options) - For 4x4 Wood

    Original price Starting at $1,249
    Original price Starting at $1,249
    Original price $1,249
    Starting at $999
    Starting at $1,249 $999
    Current price $999
    Original price $1,249
    20% Off

  • Wall-Mounted 18' x 20' Pergola with Shade Covers - Kit for 4x4 Wood

    Original price $1,699
    Original price Starting at $1,699
    Original price $1,699
    Current price $1,349
    Original price $1,699
    Starting at $1,699 $1,349
    Current price $1,349
    Original price $1,699
    21% Off

  • 18' x 20' Pergola Attached to House with Roof (6 Options) - Kit for 6x6 Wood

    Original price Starting at $1,879
    Original price Starting at $1,879
    Original price $1,879
    Starting at $1,499
    Starting at $1,879 $1,499
    Current price $1,499
    Original price $1,879
    20% Off

  • Stand-Alone 18 x 20 Pergola with Canopies - Kit for 4x4 Wood

    Original price $1,949
    Original price Starting at $1,949
    Original price $1,949
    Current price $1,549
    Original price $1,949
    Starting at $1,949 $1,549
    Current price $1,549
    Original price $1,949
    21% Off

  • Free-Standing 18' x 20' Pergola with Roof (6 Options) - Kit for 6x6 Wood

    Original price Starting at $2,499
    Original price Starting at $2,499
    Original price $2,499
    Starting at $1,999
    Starting at $2,499 $1,999
    Current price $1,999
    Original price $2,499
    20% Off

  • Attached 18 by 20 Pergola and Canopies - Kit for 6x6 Wood

    Original price $2,569
    Original price Starting at $2,569
    Original price $2,569
    Current price $2,049
    Original price $2,569
    Starting at $2,569 $2,049
    Current price $2,049
    Original price $2,569
    20% Off

  • 18x20 Covered Pergola with Sun Shades - Kit for 6x6 Wood

    Original price $3,299
    Original price Starting at $3,299
    Original price $3,299
    Current price $2,639
    Original price $3,299
    Starting at $3,299 $2,639
    Current price $2,639
    Original price $3,299
    20% Off