Honestly, most street benches are easier to assemble than people expect. You almost never need a crew or a workshop full of power tools. What you do need is a flat workspace, the included hardware, a couple of basic hand tools, and maybe an extra set of hands if the bench is heavy.
The majority of standard commercial street benches use bolt-together construction. The seat slats, backrest, and cast iron or steel legs arrive in a few pieces. Assembly is usually just lining up pre-drilled holes and tightening bolts, washers, and lock nuts. A socket wrench or ratchet set is the main tool. Many models also include hex-head bolts, so a basic hex key or Allen bit helps. A rubber mallet can gently nudge parts into alignment without scratching the finish. That is typically all you need.
Do you need power tools? Not for the bench itself. A power drill or impact driver with a socket adapter can speed up repetitive tightening, but it is optional. If you use one, set the torque low and finish by hand. Over-tightening can strip threads, crack wood or composite slats, or pull a bolt through powder-coated metal. Hand tightening gives you better feel and prevents damage.
Do you need a crew? In most cases, no. A single person can assemble smaller benches. However, larger streetscape benches with cast iron ends, steel frames, or long 6-foot and 8-foot tops can be awkward and heavy. Having a second person to hold the frame steady while you align bolts makes the job much faster and prevents scratched parts or pinched fingers. That is a helper, not a professional installation crew.
The one part that may require a power tool is anchoring the bench to the ground. If you are surface-mounting on concrete, you will need a hammer drill, a masonry bit, and concrete anchors or wedge bolts. This is not really bench assembly; it is site installation. If you are placing the bench on a lawn or compacted gravel, you may use in-ground mounts or simply set the bench in place and let its weight do the work.
A typical assembly looks like this: unpack everything and check the hardware. Lay the seat and back slats on cardboard to protect the finish. Attach the end frames loosely first, then add the center support if one is included. Once all bolts are started, square the frame, check that the bench sits level, and then tighten in a cross pattern. Flip it upright with a helper if needed. Finally, anchor it if required.
So the short answer is: no, you probably do not need a crew and power tools. You need patience, a socket set, basic hand tools, and possibly a second person for the lifting. Save the heavy equipment for concrete anchoring only.