Quick answer
Across a building or a portfolio, doors and locks are a system, not a pile of one-off jobs. A master-key hierarchy lets one manager's key open the common areas and every unit while each resident's key opens only their own door, so access is controlled from one plan instead of a drawer full of unlabelled keys. Re-keying between residents is quick and cheap and keeps that system tight; replacing hardware is for when a lock is worn, insecure or the wrong type. Add lever handles and accessible hardware where residents need them and the whole building gets easier and safer to run.
What a managed master-key system replaces.
Key points
- Across a building, doors and locks are one access system: a master-key hierarchy controlled from a single plan, not ad hoc jobs.
- A master key opens the common areas and every unit; each resident key opens only their own door. Access is managed, not guessed.
- Re-keying between residents is quick and cheap and keeps the system secure; hardware replacement is for worn, insecure or wrong-type locks.
- A restricted key system stops keys being copied at the corner shop, which is the point of controlling access at all.
- Lever handles and accessible hardware make doors usable for residents with limited grip or mobility, and are cheap to fit at re-key time.
Doors and locks are the maintenance work nobody thinks about until access goes wrong: a resident locked out, a key that opens more than it should, a drawer of unlabelled keys nobody can match to a door. Run properly, access across a building is a single system that a manager controls from one plan. Run badly, it is a slow-motion security problem. We handle doors, locks and keying as part of maintaining a building, alongside the joinery and the rest of the property work.
What a master-key system actually does
A master-key system is a hierarchy. At the top, a master key held by management opens the common areas and every unit. Below it, each resident's key opens only their own door and nothing else. In a larger building there can be sub-masters, so a wing or a floor has its own level. The point is control: access is designed and recorded, so management can get into a unit in an emergency, a resident can only reach their own home, and there is a plan showing who can open what.
Contrast that with the common reality, a drawer of keys with no record of what they open or who holds copies. That is not an access system, it is a liability. Consolidating it into one master-key hierarchy is often the single most useful access job a building can have done.
Re-key or replace?
The two jobs get confused. Re-keying changes what a lock's key is, without replacing the lock itself, so a unit that changes hands can be re-keyed in minutes and the old key stops working. Replacing hardware is a bigger job for when a lock is worn out, no longer secure, or the wrong type for the door. Most turnover access work is re-keying, not replacement, and treating it that way keeps it cheap and keeps the master-key system intact.
| Situation | Usually the answer | Why |
|---|---|---|
| Resident moves out | Re-key | Fast, cheap, old keys stop working |
| Lock worn or sticking | Replace hardware | Re-keying a failing lock buys little time |
| Lost master key | Re-key affected level | Contains the risk without redoing everything |
| Need accessible handle | Replace with lever set | Grip and mobility, fitted at the same visit |
Accessible hardware for aged care
For residents with limited grip or mobility, a round doorknob is a genuine barrier and a lever handle is the fix. Lever handles turn with a push of the wrist or forearm rather than a firm grip, which matters for arthritis, weak hands or someone using one arm. Fitting lever sets and accessible hardware is cheap when it is done at re-key or turnover time, and it is part of the same design-to-age-in-place thinking that runs through the kitchen and the bathroom. Doors are part of whether a home works for the person living in it.
This sits naturally with the rest of the maintenance we do on a building, from kitchens and joinery to flooring and painting. Handled by one contractor, the door and lock work is coordinated with the turnover repaint and any other make-good, so a unit is turned over in one planned visit rather than three separate ones.
Frequently asked questions
What is a master-key system?
A master-key system is an access hierarchy where a master key held by management opens the common areas and every unit, while each resident's key opens only their own door. Larger buildings can add sub-masters for a floor or wing. It lets access be designed, recorded and controlled from one plan rather than a random set of keys.
What does re-keying a lock mean?
Re-keying changes the internal pins of a lock so a new key works and the old key no longer does, without replacing the lock itself. It is quick and inexpensive, which makes it the standard job when a unit changes hands: the departing resident's key is made useless and the new resident gets a fresh key, all while keeping the master-key system intact.
Should I re-key or replace the locks between tenants?
Usually re-key. Re-keying is fast and cheap and makes the old keys stop working, which is all a turnover needs. Replacing the hardware is only warranted when a lock is worn out, no longer secure, or the wrong type for the door. Re-keying also preserves your master-key hierarchy, where a full replacement can disrupt it.
What is a restricted key system?
A restricted or registered key system means keys can only be cut with authorisation from the key holder, not copied at any hardware shop. It matters because ordinary keys can be duplicated freely, which quietly undermines access control. With a restricted system a manager knows how many keys exist and who holds them.
Why fit lever handles instead of doorknobs?
Lever handles turn with a push of the wrist or forearm rather than a firm grip, so they are far easier for residents with arthritis, weak hands or limited mobility, and for anyone using only one arm. Round doorknobs are a real barrier for those residents, so lever sets are a standard accessibility upgrade, cheap to fit at turnover.
Can one contractor do the doors, locks and the rest of the maintenance?
Yes, and it is more efficient. When door and lock work is handled by the same contractor doing the turnover repaint, flooring and joinery, the visit is coordinated so a unit is turned over once rather than by a string of separate trades. It also keeps the keying records and the master-key system with one accountable party.
If your building's access has drifted into a drawer of unlabelled keys, we can pull it back into one master-key system, re-key it between residents, and fit accessible lever hardware where it is needed, as part of maintaining the building rather than a separate locksmith call. Tell us how many doors and we will map the system and price it.