Lifetime 11×21 Plastic Shed with Tri-Fold Doors


2 in stock

Please select below the resgion you wish your Lifetime shed to be delivered.

Due to the COVID19 pandemic all deliveries will typically be within 30 working days.
Installations are typically within 5 weeks of order.
Any preorders will have an anticipated delivery date of up to 28 calendar days from the date it arrives into our warehouse.
SM Garden Sheds would like to apologise for any inconvenience caused

Delivery Options

Please take a look at the delivery options for your area HERE

✓Dual-Wall High-Density Polyethylene (HDPE) Construction ✓Customizable Shelving and Storage System ✓UV Protected to Prevent Weather Damage ✓Low Maintenance Design ✓High-Pitched Roof Allows for Quick Drainage of Rain and Snow ✓Slip-Resistant High-Density Polyethylene (HDPE) Floor Protects Against Oil, Solvents, and Stains ✓Heavy-Duty Steel Trusses Provide Additional Roof Strength ✓Sturdy Steel-Reinforced Construction ✓Attractive Appearance and Design ✓Lockable Steel-Reinforced Doors for Added Security

Lifetime 11×21 Heavy Duty Plastic Building with Tri-Fold Doors

The Lifetime 11×21 is an apex roof garden building, manufactured from high-density polyethylene (HDPE) with heavy duty, powder coated steel reinforcements. This structure is not only an attractive addition to your garden, but is the ideal solution for your outdoor storage needs. The Tri-Fold door model also features several shelving units and 2 peg strips to help you keep all your tools organised and at your fingertips. All of our Lifetime garden structures have steeply pitched roofs for efficient water drainage, are very low maintenance and are UV-protected to resist fading or cracking. All these features make Lifetime products a durable storage solution with a minimum warranty period of 10 years.

LIFETIME products are the highest specification heavy duty plastic storage units in the market. Apart from the high grade of HDPE, they have a 1.96m high wall height, screened vents, 2 large skylights included and strong powder coated steel bracing throughout. Each Lifetime Tri-Fold door building has and option to open completely the front entrance or to use a smaller single door to the right hand side. This feature makes the Lifetime 11x21ft Tri-Fold door perfect as a workshop or garage for motorbikes. (We suggest the minimum size for a small car is 11×16 and, of course, bigger sizes for bigger cars.

Be sure to consider the length required by your vehicle before you order. Installations are not available on this product!

Includes as standard – 2x large skylights, 4x shatter proof polycarbonate windows, 2x screened vents, 2x 30″ x 14″ shelves, 2x peg strips, internal floor.

A wide range of accessories are also available.

Nominal model sizes are based on the roof dimensions.

Please refer to the exact measurements for the precise building dimensions.

Full details on preparing a base for all buildings will be sent prior to the unit being delivered.


All buildings must be anchored to a firm foundation to protect against wind damage.

These buildings are constructed from high-density polyethylene plastic with sturdy steel reinforcements. They are UV-protected, stain-resistant, and rust resistant. Best of all they never need painting! Made in the USA. Note: This shed must be built on a flat level foundation of wood or concrete (not included).

Materials Used in Lifetime Buildings

High-Density Polyethylene

Lifetime manufacture plastic buildings  constructed of high-density polyethylene (HDPE). This is Lifetime’s material of choice because HDPE is known for its strength, durability, and resistance to chemicals and moisture. It is what makes Lifetime’s garden buildings lightweight, while maintaining superior strength and durability. Lifetime’s buildings are UV-protected, resistant to extreme heat and cold, and will not fade or crack. They are stain resistant, easy to clean, and low maintenance.


UV-Inhibitors are a very important component of Lifetime’s garden buildings. The high-density polyethylene (HDPE) is a US Food and Drug Administration (FDA) grade plastic that includes premiere UV-Inhibitors and light fast pigments to make these buildings very resistant to heat and extended exposure to the harmful UV rays of the sun. This UV protection is the best on the market and ensures that our products will not crack, chip, or peel.

Environmentally Friendly

High-density polyethylene (HDPE) is one of the most environmentally preferred plastics because it is 100% recyclable, does not create harmful emissions during production and does not leak toxic chemicals into soil or water.

Powder Coated Steel

Lifetime’s rust-resistant, powder-coated finish makes these plastic buildings resistant to chips, scratches, and regular wear-and-tear. Powder-coating prevents rusting, corrosion and protects steel parts from UV-damage, making it a great all-weather finish.

Lifetime Direct Delivery Areas

Weight595 kg
Base Size (front x Side) - cm

Deliver Time (working Days)

EAN Code

Guarantee (years)

Main Door Opening Size (height x width) Wall Height (cm)

Overall Height Wall Height (cm)

Number of Packages

Panel Thickness (mm)

Roof Size (front x Side) - cm

2nd Door Opening Size (height x width) Main Door Opening Size (height x width) Wall Height (cm)



Wall Height (cm)