In many cases, yes! You should only drill the hole(s) yourself if you’re going into a wood or laminate countertop. Otherwise, have the countertop fabricator pre-drill for either a one-hole or three-hole faucet. This doesn’t apply if you’re installing the faucet directly into a pre-formed hole in your sink, or if you’re simply swapping out an old faucet for a new one. The process is straightforward (at least, in theory). You’ll connect the two water hoses to plumbing supply valves, as well as a retaining ring to fasten the faucet to the countertop; then, you’ll tighten each with a pair of slip-joint pliers. If you have a deep sink with limited access to the underside of the countertop, splurge on a plumber. “Those complex jobs just require specific tools that most homeowners don’t have, or won’t ever use again—like a basin wrench,” says DiDona. He also advises hiring a pro for high-end faucets to ensure a perfect installation. “If you’re doing a high-end remodel, you don’t want to install a $3,000 faucet yourself only to end up with water leaking into the cabinets below and causing damage.”