A lock is only as good as its installation. Priority Group Locksmith installs, replaces and repairs door locks and deadbolts for homes and businesses in Boston, MA and Bowling Green, KY, with warranty on our work.
Most lock problems — a key that sticks, a deadbolt that will not line up, a loose handle — can be repaired without new hardware. Replace a lock when it is damaged, low grade, or when you want an upgrade; for entry doors choose an ANSI/BHMA grade 1 or 2 deadbolt, professionally installed. Priority Group Locksmith installs and repairs locks in Boston, MA and Bowling Green, KY.
Updated November 2026 · Reviewed by Priority Group Locksmith technicians
A properly installed deadbolt is the single most effective upgrade for an exterior door. We install single- and double-cylinder deadbolts, bore new doors, fit strike plates with long screws into the frame and make sure the bolt fully extends and turns smoothly. We recommend ANSI/BHMA grade 1 or grade 2 hardware for entry doors.
We replace knob locks, lever sets, handlesets, mortise locks and high-security cylinders. If you are replacing locks after a move, we can key all the new locks alike so one key opens every door.
Many lock problems can be fixed without buying new hardware:
Often the real cause is the door itself — a sagging hinge or a shifted frame. We adjust the door and strike so the lock works without force.
For front doors, rentals and businesses we install high-security cylinders with pick and drill resistance and restricted keys that cannot be copied at a hardware store.
Older homes and buildings often have original mortise locks and non-standard door preparation. Where the hardware is sound we repair or recylinder it rather than cutting the door for a new lock.
We provide lock installation and repair in Boston, MA and Bowling Green, KY, including nearby communities listed on each city page.
ANSI/BHMA grade 1 is the highest residential and light-commercial rating and the best choice for entry doors. Grade 2 is a solid option for most homes.
If the lock is good quality and the problem is alignment, wear or a stuck key, repair is usually enough. Replace locks that are cheap, badly damaged, or when you want a higher security grade.
Yes. We can install customer-supplied hardware, although our warranty then covers the installation rather than the product itself.
The most common causes are a misaligned door or strike, a worn key, or dirt in the cylinder. A locksmith can usually fix it without replacing the lock.
Call and describe the job — we will tell you what it involves before anyone heads out.
(617) 834-5793