Start with the key you want to retire
Make a list of every lock that the old key opens. Include side entrances and the door from an attached garage where relevant. Changing one cylinder does not change other locks that still accept the same old key.
For a business around High Street or Wilson Bridge Road, note whether the key is part of a larger system. A tenant should check authorization and shared-door arrangements before requesting changes.
Rekeying and replacement answer different questions
Rekeying changes the internal key combination in a compatible cylinder. It does not correct a warped door, restore a damaged handle, or turn incompatible locks into a matching set. Existing condition needs assessment.
Replacement changes the hardware and may be appropriate when a lock is worn, broken, unsuitable, or when the required operation is different. Ask why each option is being proposed for each door, rather than choosing one approach for the whole property automatically.
Plan the new keys before the old ones stop working
Decide who should receive the new keys and how many are needed. Label doors in your notes, but avoid attaching a home address to a key ring. At handover, check the agreed doors with the new keys and confirm what happens to the previous keys.
If a keypad or connected lock is also in use, its codes and accounts are a separate part of the access plan. Changing a mechanical cylinder should not be assumed to remove electronic access.
A few useful answers.
Can all existing locks be rekeyed?
Suitability depends on the cylinder design, condition, and available compatible parts. Identify the hardware before assuming it can be retained.
Will rekeying fix a stiff deadbolt?
Only if the relevant fault is addressed. Resistance caused by alignment or damaged hardware needs separate assessment.
Can I keep a key for just one door?
Explain the access arrangement you want. Whether it can be created depends on the locks and any existing key system.