Lock Installation and Replacement

Old, worn, or damaged locks are one of the easiest security upgrades to make. We install and replace deadbolts, knob locks, lever handles, and commercial-grade hardware.

Problems we solve

  • The front-door deadbolt is loose or worn out.
  • You want to add a deadbolt where there's only a knob.
  • The lock was damaged in a break-in attempt.
  • You're changing hardware finishes across the house.
  • You want higher-security locks on exterior doors.

What this service covers

Lock installation means fitting new hardware into a door, either replacing an existing lock or adding one where a hole has to be drilled. We measure carefully so the new hardware sits flush, aligns with the strike, and operates smoothly.

Common situations

  • Deadbolt install on an entry door
  • Replace worn front-door knob and deadbolt
  • Upgrade exterior locks to higher-security cylinders
  • Commercial lever handle replacement

How it works

  1. 1

    Choose hardware

    We help you pick locks that fit your door and security goals.

  2. 2

    Estimate

    You approve the parts and labor before we start.

  3. 3

    Install and align

    Bolts, strikes, and screws are set correctly for smooth operation.

  4. 4

    Test

    We test the lock repeatedly to confirm it works with your door and frame.

Why it matters

  • Doors that actually lock cleanly
  • Better-fitted hardware means less wear
  • Options across price points

Frequently Asked Questions

Should I install a deadbolt if I already have a knob lock?
Yes, if your entry door doesn't already have one. Deadbolts resist forced entry far better than knob locks alone.
Do you bring locks with you or do I buy them?
Either works. We can supply common brands, or you can provide the hardware and we install it.
Can you install a deadbolt on a door that doesn't have one?
Yes, we can drill and fit a new deadbolt on most standard doors.
Can you match the finish across multiple doors?
As long as the finish is a common one, yes. Bring a sample or a photo if you're unsure.

Ready to book lock installation and replacement?

Call (815) 446-1440 or request service online. Same Day Locksmith is a mobile locksmith service. We travel to customers throughout our service area and do not operate a walk-in storefront.

Service hours: 7:00 AM – 11:00 PM, every day. Illinois Locksmith License No. 191.000919.