GREAT SOUTHERN LOCKBusiness & property
Commercial locksmith, Melbourne — shops, offices and rentals
Master key systems, restricted keys, tenancy rekeys and lockouts for businesses across Melbourne’s inner south-east. Scheduled around your trading hours, not ours.
- Open 24 hours
- We come to you
- Public liability insured
- ABN registered
- 24/7Answered every hour
of every day - Fully mobileThe workshop comes
to your door - 29 suburbsMelbourne inner
south-east coverage - Insured & ABNPublic liability cover
ABN registered
Business work
What we handle for businesses
- Master key systems — designed around who should reach what, then installed and documented.
- Restricted key systems — keys that can’t be copied without your written authority.
- Tenancy rekeys — fast turnover between tenants for landlords and property managers.
- Shopfront and office lockouts — including before-opening emergencies.
- Lock repairs and replacements — on doors used a few hundred times a day.
- Scheduled maintenance — because commercial hardware fails from wear, usually at the worst moment.
The staff-turnover problem
Every business with ordinary keys has the same slow leak: staff leave, keys don’t always come back, and nobody is certain how many copies exist. After a few years the honest answer to “who can open this building?” is that nobody knows.
A restricted system fixes it properly — keys can only be cut against your authority, so the register of who holds one is real rather than theoretical. For most small businesses it’s a one-off cost that ends the problem permanently.
Property managers
Turnover rekeys are routine work here. If you manage a portfolio around Caulfield, St Kilda, Elwood, Brighton or Prahran, it’s worth having one locksmith who already knows what’s fitted where — it makes every subsequent job faster and cheaper.
Master keying, in plain terms
A master key system is a hierarchy. The cleaner’s key opens the amenities and the front door. A team leader’s key opens their floor. Your key opens everything. It is designed on paper first, because a system designed badly is worse than no system at all — and it is documented so that in three years the register still means something.
For a written quote
- Number of doors
- Existing hardware brand if known
- How many key holders
- Preferred access hours
Email the details to greatsouthernlock@gmail.com and you'll get a figure back in writing.
Call 0468 770 558Commercial hardware
Doors and systems we handle
- Aluminium shopfront doors
- Frameless glass doors
- Patch locks and pivots
- Roller shutters
- Roller door locks
- Fire doors and exit hardware
- Panic bars
- Push-to-exit and mortice night latches
- Restricted key systems
- Master key systems
- Key registers
- Tenancy changeover rekeys
- Cabinet and locker locks
- Letterbox and mailroom locks
- Padlocks and hasps
- Door closers
- Strike plates
- Lock maintenance schedules
Describe what is on the door when you ring and the right stock travels with the van the first time.
Need a quote for commercial work?
Call, or email the details and you'll get a written figure back.
Read next
Guides on this
Longer answers to the questions that come up before people ring.
Questions
Commercial questions
Do you work with property managers and real estate agencies?
Yes — rekeys between tenancies, lockouts, and keeping a consistent key system across a portfolio. If you manage multiple properties it’s worth having one locksmith who knows what’s installed where.
What is a master key system?
A hierarchy of keys. Each tenant, staff member or room gets a key that opens only their door, while a master key opens everything above it. Useful for offices, share buildings, clinics and anywhere with multiple lockable areas and one person who needs access to all of them.
Can you work outside trading hours?
Yes. Most commercial work is better done before opening or after close, and that’s usually how it gets scheduled. Say what suits when you call.
Do you supply restricted keys for businesses?
Yes — Mul-T-Lock restricted systems, where keys can only be cut with your written authority. It stops the quiet problem of staff copying a key at a shopping-centre kiosk on the way home.
Do you invoice, or is it pay-on-the-day?
Either. Card and cash on the day, or a tax invoice for businesses and agencies on account.
Other things we do
Car key replacement
Lost every key to the car? We cut and program a new one at the roadside for most makes and models — no tow, no dealership wait.
Read more
24/7 emergency lockout
Locked out of the house, car or shop. Non-destructive entry wherever it’s possible, any hour of the night.
Read more
Lock rekeying & changes
New place, old tenant, or a key that walked off. Rekeying kills the old keys without paying for all-new hardware.
Read more
Mul-T-Lock restricted keys
High-security cylinders that can’t be copied at a kiosk. Real control over who holds a key to your building.
Read more
Deadlocks & window locks
Proper deadbolts on every external door, patio bolts on sliders and key locks on the windows that matter. Keyed alike if you want one key.
Read more