Replacing a Lockwood 570 series lockset is well within reach for a confident DIYer. Because it involves no electrical, gas, or plumbing work, there are no licensing restrictions — any homeowner can legally swap out a lockset on their own door. That said, getting it right matters for your home's security, so it pays to understand the process before you start.
What Is the Lockwood 570 Series?
The Lockwood 570 series is one of the most popular residential locksets in New Zealand. It's a mortice-style lockset — meaning the lock body sits inside a pocket (mortice) cut into the door edge — and it's widely used on timber-framed homes throughout the country. The 570 series is known for its durability and is commonly found on both front and back doors. Because it's been a staple of the NZ market for decades, replacement parts and compatible locksets are readily available at most hardware stores.
Tools and Materials You'll Need
Before you start, gather the following:
- Replacement Lockwood 570 series lockset (or a compatible equivalent)
- Phillips head and flathead screwdrivers
- Tape measure and pencil
- Chisel and mallet (if adjusting the mortice or strike plate recess)
- Drill with appropriate bits (if enlarging or repositioning holes)
- Safety glasses
You can find replacement locksets and tools at Bunnings, Mitre 10, or PlaceMakers. When purchasing, confirm the backset (distance from the door edge to the centre of the handle spindle) matches your existing setup — the 570 series typically comes in a 60 mm or 70 mm backset.
Step-by-Step: Replacing Your Lockwood 570 Lockset
1. Remove the Existing Lockset
Open the door and locate the screws on the interior rose or handle plate. Remove these screws and pull both handle assemblies away from the door. Next, unscrew the lock body from the door edge (usually two screws on the faceplate). Slide the lock body out of the mortice pocket.
2. Check the Mortice Pocket
Inspect the mortice pocket for damage or rot — a common issue in older NZ homes, particularly in wetter regions. If the timber is soft or crumbling, you may need to repair it before fitting the new lock. Minor damage can be filled with a suitable timber filler; significant rot should be assessed by a builder.
3. Fit the New Lock Body
Slide the new lock body into the mortice pocket. The faceplate should sit flush with the door edge. If it doesn't sit flush, you may need to deepen the recess slightly with a chisel. Secure the lock body with the provided screws.
4. Install the Handles and Roses
Thread the spindle through the lock body and attach the exterior handle, then the interior handle. Tighten the fixing screws firmly but don't overtighten, as this can bind the mechanism. Test the handle action — it should move freely and the latch should spring back cleanly.
5. Fit the Strike Plate
Check that the strike plate on the door frame aligns with the latch and deadbolt. If the new lockset's geometry differs slightly from the old one, you may need to adjust the strike plate position or deepen its recess with a chisel. A well-fitted strike plate is critical for both security and smooth operation.
6. Test Everything
With the door open, test the latch and deadbolt several times. Then close the door and test from both sides, including locking and unlocking with the key. Make sure the door closes and latches without force.
Important Considerations for NZ Homes
- Rental properties: If you're a landlord, be aware that the Healthy Homes Standards require rental properties to have adequate security. Replacing a faulty lockset promptly is good practice and may be a legal obligation.
- Building consent: Replacing a like-for-like lockset on an existing door does not require a building consent under Schedule 1 of the Building Act. However, if you're changing the door itself or making structural alterations, check with your local council. MBIE Building Performance has useful guidance on what work requires consent.
- Heritage or body corporate properties: If your home is heritage-listed or subject to a body corporate, check any relevant rules before changing external hardware.
- Keying alike: If you want your new lockset keyed to match your other door locks, a locksmith can rekey the cylinder for you — this is a straightforward job for a professional.
When to Call a Professional
While replacing a Lockwood 570 lockset is DIY-friendly, there are situations where it's best to call a qualified locksmith:
- The mortice pocket is damaged or the door frame is rotten or misaligned
- You're unsure which replacement lockset is compatible
- You want the new lock keyed alike with your existing locks
- The door has swollen, warped, or is hanging incorrectly, causing the lock to bind
- You've lost all keys and need the lock picked or drilled out safely
- You want a security upgrade and need professional advice on lock grades
A qualified locksmith can also advise on whether your current lock meets the security requirements of your home insurance policy — some insurers specify minimum lock standards. You can find a trusted local locksmith on tradedirectory.co.nz.
