Not all deadbolts are equal — and on the Central Coast, the coastal
environment adds another consideration.
- Single-cylinder — key outside, thumb turn inside. Best for most
residential doors. Convenient and insurance-compliant
- Double-cylinder — key on both sides. Choose this for glass-panelled
doors where a broken pane could allow a hand to reach the thumb turn
- Stainless steel (coastal must-have) — standard steel corrodes
rapidly in salt air. Stainless steel costs more upfront but lasts significantly longer in
Central Coast conditions
Installation typically takes 30–60 minutes per door, depending on whether it's a new
installation or a replacement:
- Bore the hole — for new installations, the locksmith drills the
correct diameter hole at the right height and backset for your door
- Fit the cylinder and bolt — the deadbolt mechanism is seated in
the door, properly aligned, and secured
- Install the strike plate — a reinforced strike plate is morticed
into the door frame with long screws to resist forced entry. This is as important as the
lock itself
Standard single-cylinder (supply & install)
$199–$250
30–60 min
Stainless steel / coastal grade
$300–$400
30–60 min
High-security Grade 1 deadbolt
$400–$550
45–90 min
Double cylinder (glass door
application)
$250–$400
30–60 min
Replacing an existing deadbolt is typically faster and cheaper
than a new installation from scratch. Get 3 quotes to compare.
Deadbolts are non-negotiable for insurance compliance — most Australian home and
contents policies require them on all external doors. For Central Coast rental properties,
stainless steel deadbolts are worth the premium: they last far longer in the
coastal environment and avoid the maintenance headache of rusting, seizing locks mid-tenancy.
For holiday rentals, consider smart deadbolts that allow remote
access code management between guest stays.
