Domakihub How to Install a Deadbolt Lock: A Step-by-Step Guide
Secure any door in your home, rental, or hotel room with a new deadbolt in under an hour.
Reviewed by Domakihub home & decor pros · 2026-06-23 · 5 min read
A deadbolt is one of the most effective and affordable security upgrades you can make to any door — whether it is a private home in Athens, a holiday villa in Crete, or a boutique hotel room on the Cyclades. The video above from HGTV walks you through the process visually, while this article breaks it into clear, ordered steps you can follow with basic hand tools. No professional locksmith is required for a standard door that already has the correct bore holes.
Why a Deadbolt Makes a Real Difference
Unlike a spring latch that can be pushed back with a credit card, a deadbolt extends a solid steel bolt directly into the door frame with no spring mechanism to override. This single-point difference dramatically raises the effort needed to force a door open, which is enough to deter most opportunistic break-ins.
For landlords and property managers in Greece, fitting deadbolts on all exterior doors also reduces liability and satisfies the growing expectation of guests and tenants who check security features before booking or signing a lease.
What to Buy Before You Start
Most hardware stores in Greece carry standard European-profile deadbolts that fit doors 35–45 mm thick. If you are replacing an old lock, check whether the existing bore holes (the large 54 mm cylinder hole and the smaller 25 mm latch hole) already match a standard kit — if they do, the job is a straight swap with no drilling. Buy a kit that includes the lock body, strike plate, reinforced screws (at least 75 mm long), and a paper template for marking new holes.
For exterior doors exposed to sea air near the coast, choose a deadbolt with a stainless-steel or marine-grade brass finish to resist salt corrosion.
How to Install a Deadbolt: 5 Steps
- 1
Mark and drill the cylinder hole
Tape the paper template supplied with your kit to the door at the correct height — typically 150–200 mm above or below the door handle. Use a 54 mm hole saw to drill the large cylinder hole through the face of the door. Drill from both sides to prevent splintering: stop once the pilot bit just pokes through, then finish from the other face.
- 2
Drill the latch bolt hole
Using a 25 mm spade or Forstner bit, drill the smaller horizontal hole through the door edge at the center mark shown on the template. This hole meets the cylinder hole inside the door and is where the bolt will travel in and out. Keep the drill level and square to the edge to avoid the bolt binding when you turn the key.
- 3
Chisel the latch plate recess
Insert the latch assembly into the edge hole and trace around its faceplate with a sharp pencil. Remove the latch, then use a sharp chisel to cut a shallow recess exactly 2–3 mm deep so the faceplate sits flush with the door edge. A flush fit is essential — if the plate protrudes, the door will not close properly. Screw the latch assembly in place.
- 4
Fit the lock cylinder and interior thumbturn
Feed the exterior cylinder through the large face hole so its tailpiece (the metal bar) slots into the latch mechanism. Press the interior thumbturn onto the other side so the two halves sandwich the door. Insert and tighten the two mounting screws that hold both halves together — do not overtighten or the cylinder may bind. Test that the key turns and the bolt extends and retracts smoothly.
- 5
Install the strike plate on the frame
Close the door and turn the key to extend the bolt fully, then mark where the bolt meets the door frame. Cut or chisel a recess for the strike plate box (the metal cup that receives the bolt) and a shallow recess for the plate face. Secure the strike plate with the long screws provided — 75 mm or longer screws that reach the structural frame behind the trim are critical; short screws can pull out with one firm kick.
Rather have a pro handle it?
Get a vetted locksmith pro in your city — one number, booked in EN/EL/DE.
FAQ
- Do I need to drill new holes if I am replacing an old deadbolt?
- Usually not. Most replacement deadbolts follow the European standard with a 54 mm face hole and a 25 mm edge hole on the same center line. Check the measurements of your existing lock against the new kit before buying. If the backset (the distance from the door edge to the cylinder center) matches — commonly 60 mm or 70 mm — the new lock will drop straight in.
- What type of deadbolt is best for a wooden holiday rental door in Greece?
- A single-cylinder deadbolt with a thumbturn on the inside is the most practical choice for rental properties — guests can exit quickly in an emergency without needing a key. Choose a Grade 1 or Grade 2 (ANSI) or an equivalent European security class (EN 12209 Grade 3 or higher) for solid resistance to picking and drilling. Pair it with a reinforced strike plate and long screws for the best result.
- Can I install a deadbolt on a metal or aluminum door?
- Yes, but you will need a bi-metal or carbide-tipped hole saw rather than a standard wood hole saw. Aluminum doors common on many Greek apartment buildings are softer than steel and drill without much difficulty. Steel doors require more patience and a slow drill speed with cutting oil. Always check that the door's internal reinforcement does not run through the bore area before you cut.