How to Install an Entry Door Lockset?

Most entry door locksets are straightforward swaps once you confirm the fit. The common cylindrical knob or lever style uses a 2-1/8 inch hole through the door face and a 1 inch hole in the door edge, with a backset of either 2-3/8 or 2-3/4 inches. Before opening any packaging and for a standard replacement, measure those dimensions and check your door thickness against the new lockset’s range so you don’t buy hardware that won’t fit.

Measure and Prep the Door First

Open the door and stabilize it before you mark or drill anything. A door that can swing while you work is dangerous and leads to off-center holes.

Measure the existing setup. If you’re replacing hardware, match the new lockset to the current backset and hole sizes. If this is a new door, the standard placement for the face bore is about 36 inches from the floor, with a 2-1/8 inch face bore and a 1 inch edge bore. Use the paper template that ships with the lockset to mark both bore centers clearly.

Backset is the distance from the door edge to the center of the face bore. Almost all residential doors use either 2-3/8 or 2-3/4 inches. If you order the wrong one, the latch won’t reach the strike plate, so double-check this number before you buy. Door thickness matters too; most standard locksets fit 1-3/8 to 1-3/4 inch doors, but confirm yours is in range.

If you’re shopping for new hardware, this roundup of the best entry door locksets compares models that fit standard door prep.

Remove the Old Hardware and Bore New Holes

Remove the screws on the interior side of the old knob or lever, then pull the two halves apart. Slide the old latch out of the door edge and clean any loose debris from the bores. If you’re reusing the existing holes, skip ahead to installing the new latch.

For a new door, drill the large face hole with a 2-1/8 inch hole saw. Drill halfway through from one side, then finish from the other side. This prevents splintering the face of a finished door. Drill the 1 inch latch hole in the door edge the same way. Clear sawdust as you cut and wear eye protection.

Trace the latch plate onto the door edge with a utility knife, then chisel a shallow mortise about 5/32 inch deep, or until the plate sits flush with the edge. A proud plate keeps the door from closing smoothly.

Install the Latch and the Lockset Halves

Insert the new latch into the edge bore with the beveled edge facing the jamb. Get this wrong and the door won’t latch. Secure the latch plate with its screws.

Fit the exterior half of the lockset through the face bore so the spindle engages the latch mechanism. Hold the interior half in place, align it with the spindle, and fasten the two halves together with the provided through-bolts. Tighten firmly but don’t overtighten; stripped screw holes in a steel door are a headache, and crushed wood in a wood door is permanent.

Check latch alignment before you tighten everything — this is where most first-timers struggle. Close the door slowly and watch where the latch hits the jamb. If it lands high, low, or off-center, the strike plate needs adjusting.

Install the Strike Plate and Test

Mark the strike plate’s position on the jamb where the latch meets it. Drill a 1 inch hole about 1/2 inch deep for the latch bolt to seat into — this is the “strike bore” that gives the latch room to engage fully. Trace the strike plate, chisel a flush mortise, and screw it in place so its opening lines up with the latch.

Test the door several times. The latch should slide home smoothly, the key should turn without binding, and the interior knob or lever should operate without catching. If the door doesn’t close cleanly, loosen the strike plate screws and shift it slightly in the direction needed, then retighten.

Most installation errors trace back to three spots: a latch installed backward, a strike plate that doesn’t align with the latch, and a missing mortise that leaves hardware proud of the surface. Any of these will keep the door from latching cleanly, and all three are easy to fix before you call it done.

For a standard replacement lockset on an existing door, the whole job runs about an hour with a screwdriver, a chisel, and a drill. New installations with fresh bore holes take longer, but the procedure for a new door is identical to what’s described above, just with drilling added upfront.

If the door is prefinished, take extra care with the chisel work. Score the finish with a knife before cutting the mortise to avoid tearing the surface, and drill from both sides as noted to protect the face.

Always use eye protection when drilling and keep the door clamped or wedged so it cannot move mid-cut. Take it slow, clear the sawdust, and confirm the strike alignment before final tightening. A door that operates smoothly on the first try is the reward for measuring twice and drilling carefully.