3-point lock: installation, benefits and prices in Paris

A 3-point lock (serrure multipoints) is one of the most effective ways to reinforce your front door in Paris. Instead of one locking point, it secures the door at three separate points simultaneously.

How does a 3-point lock work?

A single key turn activates three locking bolts — typically at the top, middle, and bottom of the door frame. This distributes resistance across the entire door, making it significantly harder to force open compared to a single-point lock.

Benefits of a 3-point lock for Paris apartments

Key benefits include: greatly improved resistance to forced entry, better sound and thermal insulation, compliance with most home insurance requirements, and compatibility with A2P certified cylinders. Recommended for ground-floor apartments and main entrance doors.

How much does a 3-point lock cost in Paris?

Installation of a 3-point lock system typically costs between €200 and €400 all-inclusive, depending on the brand and door compatibility. Premium brands like Fichet or Mul-T-Lock may be higher.

Our expert tips

• ✓Ensure your door frame is solid enough to support a multipoint system
• ✓Combine with an A2P** or A2P*** cylinder for maximum protection
• ✓Ask your locksmith to check door alignment before installation
• ✓Keep the installation invoice for your insurance records

FAQ

What is the difference between a 3-point lock and a multipoint lock?
A 3-point lock is a type of multipoint lock that secures at exactly 3 points. Multipoint locks can have more locking points (5, 7, or more) for even greater security.

Can a 3-point lock be installed on any door?
Most standard apartment doors can accommodate a 3-point system, but the door frame must be in good condition. A locksmith will assess compatibility before installation.

Does a 3-point lock require a different key?
Usually no — you can keep your existing key format. The locksmith fits the lock mechanism to your door and installs a compatible cylinder.