That's a great question, and one many shoppers have! The answer is: it depends entirely on the specific bench you ordered. Most modern outdoor benches, especially those ordered online, are delivered with some assembly required. This is typically done to protect the item during shipping, reduce delivery costs, and make handling easier.
You'll often receive what's called "flat-pack" furniture. This means the main components—like the seat slats, backrest, arms, and legs—are packed separately. Your delivery will include a hardware kit (screws, bolts, washers) and an instruction manual. Common tools needed are an Allen wrench (often provided), a screwdriver, and sometimes a small wrench. The assembly process for a standard bench usually takes 30 minutes to an hour for one or two people.
However, some high-end or specially crafted benches, particularly those made from a single piece of stone or a welded metal frame, may be delivered fully assembled. The product description on the retailer's website should always state "Some Assembly Required" or "Fully Assembled." If you're unsure, checking this before you buy is the best step.
When your bench arrives, carefully unpack all parts and lay them out. Follow the step-by-step instructions, and avoid over-tightening the fasteners, especially in wood, to prevent splitting. Having a friend help can make the job quicker and safer. So, while you should generally expect to do some light DIY, the result—a perfect spot to relax in your garden—is well worth the little bit of effort.