How to Install Cabinet Doors on an Existing Cabinet

Cabinet doors wear out, get damaged, or simply fall out of style long before the cabinet box itself needs replacing. Installing new doors on an existing cabinet is one of the most satisfying kitchen upgrades you can do—it transforms the whole room for a fraction of the cost of new cabinetry, and it's straightforward enough that most homeowners can handle it in an afternoon. The key is understanding hinge placement, taking time to measure twice, and accepting that fine-tuning the fit happens in small adjustments, not one perfect installation. Done well, new doors look built-in and professional, with clean gaps and perfectly aligned edges.

1. Remove Old Doors First. Open each door fully and locate the hinge screws on the inside of the cabinet frame (not on the door itself). Use a screwdriver to remove all screws holding the hinges to the frame. Support the door with your free hand as you remove the last screw—don't let it drop. Set the old doors aside flat in a safe spot; you won't need them again, but it's good practice not to damage them in case you change your mind.
2. Mark Hinge Positions Precisely. Look at the inside edge of the cabinet frame where the old hinges were mounted. You'll see either round cup holes (35mm is standard) or rectangular mortises for older-style hinges. Measure from the top and bottom edges of the cabinet to the center of each hinge hole. Also measure the distance from the inside edge of the frame to the center of the hole. These measurements tell you exactly where your new hinges need to sit. Write them down clearly.
3. Drill Hinge Holes in Doors. Lay the new door on a flat work surface with the inside face up (the face that will show hinges when the door is hung). If your hinges are cup-style, you may need to drill 35mm holes in the door if they're not pre-drilled. Measure from the top and bottom edges of the door to mark where the hinge centers should be—typically 3.5 inches from the top and 9 inches from the bottom, but match whatever spacing your cabinet used. Once marked, drill the cup holes carefully, using a Forstner bit at 35mm diameter. If your hinges are mortise-style, use a chisel to create a recess for the hinge plate—this takes longer but ensures a flush fit.
4. Install Door-Side Hinges. Press the hinge cups (or plates) into the holes you've prepared. Most cup hinges slide in with a slight twist and click into place. For mortise hinges, screw the plate into the recess you chiseled. Don't fully tighten the door-side hinge screws yet—you want them snug but loose enough to adjust. The cabinet-frame hinges will be tightened fully in the next steps.
5. Secure Hinges to Frame. Using your measurement notes from Step 2, position the frame-side hinge arms on the inside edge of the cabinet frame. They should sit in the existing cup holes (if you're reusing the same holes) or in new holes you've drilled. Screw the hinges firmly to the frame—these won't move again. Use the cabinet-frame hinge screw holes as your guide; if you're drilling new holes, use a spade bit or Forstner to keep them clean and straight.
6. Mount First Door Onto Frame. Lift the first door and align its hinge cups with the hinge arms sticking out from the cabinet frame. Push the door onto the arms firmly—you should hear or feel a click as the cup locks onto the arm. The door should hang freely and swing open and closed without binding. If it doesn't swing smoothly, check that the hinge arm is fully seated in the cup. Close the door and look at the gap between the door and the cabinet frame. If it looks even on all sides, move to Step 6. If not, mark the problem area and proceed to the adjustment step.
7. Fine-Tune Gaps and Alignment. European cup hinges allow three types of adjustment: in and out (away from or toward the frame), up and down, and angle (tilt). Most adjustments happen with small Phillips-head screws on the hinge arm itself. Loosen the appropriate screw slightly, make a small adjustment (1/16 inch is a big move), then check the door. If the door is too far out from the frame, turn the in-out adjustment screw clockwise. If it's too high, turn the vertical adjustment screw counterclockwise. Work slowly—you're aiming for a 1/8-inch gap all the way around the door. Once the gap looks even, tighten the adjustment screws fully and close the door firmly to make sure it stays in place.
8. Lock Down Door Hinges. Once the first door is sitting perfectly, go back and fully tighten all the screws on the hinge cups attached to the door itself. These are the small screws that hold the cup into the door's hole. Tighten them in a star pattern (top, then bottom, then left, right if there are four) to keep pressure even. The cup should not move at all when you try to wiggle the door side to side.
9. Repeat Process for Second Door. Repeat Steps 3 through 7 for the second door (and any additional doors if your cabinet has more than two). Measure and drill hinge holes in the same relative positions as the first door. Install hinges, hang the door, and adjust until the gaps are even and match the first door. Pay special attention to the gap between the two doors where they meet in the middle—this gap should be the same width as the gaps on the outer edges. This middle gap is usually the first thing people notice, so it needs to be perfect.
10. Add Soft-Close Hardware. If your new doors didn't come pre-installed with soft-close dampers or magnetic catches, you can add them now. Magnetic catches mount on the frame and pull the door closed with a satisfying thunk. Soft-close mechanisms require a tiny piston mounted inside the hinge or on the frame and prevent slamming. Both are optional but common in modern kitchens. Follow the manufacturer's instructions for mounting height and distance from the door edge—these vary by brand.
11. Verify Smooth Operation. Open and close each door ten times. They should swing freely, close smoothly, and not bind at any point in their travel. Look at the gaps from arm's length away—they should appear even and professional. Check that the doors don't hit the cabinet sides when fully open. If they do, the hinges may need a slight in-out adjustment. Open both doors at once and make sure they don't collide with each other. Stand back and look at the whole cabinet from across the kitchen; the doors should look aligned and intentional, not jury-rigged.
12. Polish and Finish Cabinet. Wipe down the cabinet frame and doors with a damp cloth to remove dust and debris from drilling. If you installed new doors on a stained or finished cabinet, the new doors may have a slightly different finish. A light application of the same stain or wood conditioner can help them blend in—test on a hidden edge first. Check all visible screw heads and make sure they're tight. If you filled old hinge holes, sand the filler smooth once it's dry and touch it up with stain or finish to match the cabinet frame.