The buildings and the hardware
The building stock here means a mix of hardware challenges. Many doors are original or several decades old, so you’ll find thick wooden doors with historic mortise hardware, narrow stile wood doors with rim locks, and modern hollow metal fire doors in multi-unit buildings. Apartment entries often use master-keyed systems or heavy-duty cylindrical locks that need precise keying and code control, while single-family houses more commonly have standalone deadbolts. That variety affects repair choices: you might need a new mortise body, a splice for a damaged tailpiece, or different length screws and plates to get the latch to seat cleanly in the frame.