A good lock badly installed is a weak lock. A deadbolt that doesn’t fully extend, a strike plate held by short screws, or a latch that rubs every time you close the door all cost you security. Prime Locksmith Services installs new locks for homes and businesses across St. Louis and fits them properly, so they lock cleanly and stand up to a kick or a pry bar.
We install deadbolts, knob and lever sets, handle sets, patio door locks, keypad locks and high-security cylinders from brands such as Schlage, Kwikset, Medeco and Mul-T-Lock. We can bring the hardware, or install locks you have already bought.
For lock installation in St. Louis or any job for a residential locksmith in St. Louis, call (314) 745-4590.
From choosing the hardware to a door that closes smoothly.
Which doors, what lock you have now, and what you want: keyed, keypad or high security.
We recommend hardware that fits your door and budget, and quote it upfront.
We check the backset and bore holes and adjust the door so the bolt throws fully.
New lock, a solid strike plate and long screws into the door frame.
All new locks can be keyed to one key. We test every one before we leave.
Many front doors are held shut by strike plate screws that only reach the thin trim. Three-inch screws into the wall stud make the door far harder to kick in, and we fit them with every deadbolt we install.
Prime Locksmith Services’ own price ranges from our pricing page. The final price depends on the hardware you pick.
| Service | Typical price |
|---|---|
| Residential lock change, installed (per lock) | $75 to $250 |
| Residential lock installation | $50 to $300 |
| Keypad lock installation | $100 to $600 |
| Commercial lock installation | $75 to $600 |
| High-security locks | $250 to $1,099 |
What moves the price: the lock and brand, whether the door needs new holes drilled or adjusting, and how many locks are keyed alike. Call (314) 745-4590 for a quote.
Single and double cylinder deadbolts, Grade 1 and 2, fitted with reinforced strike plates.
Matching entry sets for front, back and interior doors.
Medeco and Mul-T-Lock cylinders that resist picking and use restricted keys.
Code entry and app control. See smart lock installation.
Secondary locks and bars for sliding doors, a common weak point.
Storefront, office and back-door locks for businesses.
A few questions decide the best fit.
Rekeying fixes lost keys. These call for new hardware.
Our team of skilled locksmiths are standing by to assist you with lockout, or rekey requirements.
Our highly trained technicians are well-known for our superb emergency locksmith services.
Your property will be fitted with the highest quality locks. Each one comes with a satisfactory guarantee.









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