Walk through your normal routine
List the front, side, and garage-to-house entrances separately. Note which keys work in each, and include any locks you rarely use but still rely on. That small inventory is more useful than requesting a general change of locks without knowing what is included.
After a visit to McCord Park or an evening near the Village Green, you may come home through a different door from the one guests use. Plan access around those actual routines, including who needs a spare and where it will be kept.
Keep good hardware when it fits the job
Rekeying suitable cylinders changes the key they accept while retaining the existing lock. Replacement may make more sense when hardware is damaged, unreliable, incompatible, or does not provide the operation you want. Neither option should be chosen solely from a photograph.
If a bolt moves easily with the door open but resists when closed, mention it. The fit of the door and strike may matter as much as the cylinder. Do not force the key to compensate for a door that is out of alignment.
Agree on the finished result
Discuss the included doors, key quantities, and checks after the work. For a rental, obtain the owner or manager's authorization before making changes. If you are considering a keypad, have its model and the door details ready rather than assuming every product will fit.
A few useful answers.
Can the front and back doors share one key?
Possibly, if the cylinders and keyways are compatible. Identify the brands and affected doors first.
Is a sticky key always a failed lock?
No. Key wear, the cylinder, and door alignment can produce different symptoms. Explain when the resistance occurs.
Do I need to change every lock after losing one key?
Identify which doors that key operates. The proposed changes should address the relevant access, with other doors considered separately.