New UPVC Door Lock vs New Gearbox
Handles & Hinges UPVC Maintenance Ltd supply expert advice on replacement parts for UPVC doors. Often, you don’t need a full lock—just a new gearbox can save you time, hassle, and over £150.
Before you replace the entire lock—which often needs cutting and professional fitting—check whether just the gearbox is worn. In most cases, that’s all that fails.
Quick cost comparison
| Option | Pros | Cons | Approx Cost |
|---|---|---|---|
| Full-size multipoint lock | Complete replacement, new internals | Expensive, needs cutting, higher carbon footprint | £165 - £190 |
| Replacement gearbox only | Budget-friendly, quick fit, posts through letterbox | Only fixes one part | £30 - £35 |
When to choose a gearbox instead of a full lock
- Only the gearbox mechanism is worn or stuck.
- The lock case and handles are in good condition.
- You prefer an easy installation with minimal waste.
FAQ
How much can you save?
Often over £150 — full locks can cost £165-£190, while gearboxes are
around £30-£35.
Will it fit easily?
Yes — gearboxes fit into the existing lock case and typically drop in
through the letterbox.
When is a full lock needed?
If the lock case, keeping plate, or faired hardware is also worn or
damaged outside of the gearbox.