NorthTech Security & Technology Experts

Melbourne locksmiths · 24/7 callouts

Melbourne locksmiths for master keys and safer access.

From a single security rekey to a building-wide master key system, NorthTech helps Melbourne homes and businesses take control of who can open each door.

Explore master key systems Call 03 8405 3002

Melbourne based · Homes and businesses · Planned and urgent work

Illustrative image of a locksmith working on a door lockIllustrative image

Locked out or unable to secure a door?

NorthTech offers 24/7 locksmith callouts for urgent lock problems. Our office number diverts after hours; call to discuss the situation and next available attendance.

Call 03 8405 3002

Locksmithing for real life

The right work for the lock you have.

We look at the door, the hardware and who needs access before recommending a repair, rekey or replacement.

  1. 01

    Master key systems

    A planned hierarchy of keys for workplaces, shared buildings and properties with many doors.

  2. 02

    Security rekeys

    Change which key opens a suitable existing lock after lost keys, a move or a change in staff.

  3. 03

    Lock changes and repairs

    Replace damaged or unsuitable hardware, or repair what can safely stay in service.

  4. 04

    Emergency openings

    24/7 locksmith callouts when you are locked out or cannot secure your home or premises.

Master key systems

One clear plan for every key and every door.

A master key system gives each person the access their role needs. A room key can open one area, a team key can open a group, and a carefully held master key can open more. The hierarchy is designed around your building.

For properties that need controlled replacement keys, Series Six by Australian Lock Company is a locally made option for medium-security master key systems. NorthTech is a Series Six dealer, so we can plan the system and arrange replacement keys through its authorised process.

Discuss a master key plan

We assess the existing doors, hardware and access needs before recommending Series Six or another key system.

Clear access levelsDecide who can open each door before cylinders are changed.

Controlled key issueRestricted keys are supplied through authorised channels.

Made in AustraliaSeries Six barrels and keys are made by Australian Lock Company.

Read Australian Lock Company’s Series Six information (opens in a new tab)

Rekey, repair or replace?

A change of keys does not always mean a new lock.

We explain the options after checking the hardware and the reason for the change.

Security rekey

Where the existing lock is suitable, rekeying changes the key that operates it. It can make sense after lost keys, a change of tenancy or a staff departure.

  • Check which doors and copies are affected
  • Assess lock condition and compatibility
  • Agree who receives the new keys
Learn about rekeying

Lock change or repair

If hardware is damaged, unreliable or no longer fits the way a door is used, repair or replacement may be the better answer. We explain the reason before work begins.

  • Inspect the lock, door and frame
  • Choose hardware for the actual opening
  • Check operation before handover

For commercial doors, the final hardware also needs to suit any applicable fire, access and exit requirements.

What happens next

A practical plan, then careful work.

01 / TALK

Tell us what has changed

Lost keys, more staff, a lockout or a building with too many keys: we start with the actual problem.

02 / CHECK

Review doors and access

For planned work, we map the doors, people and hardware, then recommend a clear scope.

03 / HAND OVER

Test and explain

We check the work and explain which keys open what, and how future changes are handled.

Common questions

The details that matter before you decide.

What is a master key system?
It is a planned arrangement of locks and keys with different access levels. An individual key may open one door, while an authorised master key opens a wider group. We design the hierarchy for the property and the people using it.
What is the difference between master and restricted keys?
Master keying describes which doors a key opens. A restricted-key system controls how replacement keys are requested and supplied. The two can be used together.
Is Series Six right for every building?
No single system suits every property. Australian Lock Company describes Series Six as a medium-security master key option. NorthTech is a Series Six dealer, and we check the doors, access needs and level of key control before recommending it.
Can you open a lock after hours?
NorthTech offers 24/7 locksmith callouts for urgent access and lock problems. Our office number diverts after hours. Call to describe the situation and discuss the next available attendance.
Should I rekey or change locks after losing a key?
It depends on the lock condition, key type and who might have the missing key. Rekeying may suit a sound lock; damaged or unsuitable hardware may need replacing.
Can existing locks join a master key system?
Sometimes. We inspect the current cylinders and door hardware before saying what can be retained, changed or replaced.
Do you cut keys?
Yes, on site at your property as part of a locksmith visit. We do not offer a key-cutting service at the office.
Do you offer car or vehicle locksmithing?
No. NorthTech's locksmithing covers homes and businesses, including door and window locks and commercial access hardware. We do not offer automotive locksmithing, so for a locked-out vehicle or lost car key please contact an automotive locksmith.
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Let’s make access easier to manage.

Call about an urgent lock issue, or tell us about the doors and people in your planned master key project.

Plan a master key system

Office: Monday to Friday, 8am–6pm, and Saturday, 8am–12pm. Showroom visits by appointment. 24/7 emergency locksmith callouts.