
Door Knob Lock Repair and Replacement: What We Actually Fix
A door knob lock fails in more ways than most people expect. The latch bolt can retract sluggishly or not at all. The cylinder can become so worn that the key turns but nothing catches. The rose plate can loosen, causing the entire knob assembly to wobble and eventually separate from the door. In older San Rafael homes — particularly the Craftsman and mid-century properties common in Dominican and Sun Valley — original hardware sometimes dates back decades, and sourcing compatible replacement parts requires real working knowledge of how lock generations evolved, not just a quick internet search. Our technicians diagnose the specific failure point before recommending repair or replacement, so you are never paying to swap out hardware that could have been serviced.
We carry a wide inventory of door knob with lock assemblies from trusted hardware manufacturers, including Schlage and Kwikset, covering residential passage knobs, privacy knobs for bathrooms and bedrooms, and keyed-entry knobs for exterior doors. Beyond the knob itself, we also service and install the full range of deadbolt configurations — single-cylinder, double-cylinder, and interconnected deadbolt-and-knob sets. For properties needing the strongest possible door defense, we install and service mortise locks, which replace the interior of the door edge with a full lock body rather than a simple bolt mechanism. A mortise lock is significantly more resistant to kick-in and manipulation than a standard cylindrical lock, making it a practical upgrade for street-facing doors in higher-traffic neighborhoods near Downtown San Rafael or Canal.

