Window Handle and Lock Upgrades: Improve Security Without New Windows

You do not need new windows to significantly improve the security of your existing frames. In most cases, upgrading the locking hardware is a fraction of the cost of replacement and delivers meaningful improvements in break-in resistance. Here is what actually makes a difference.

What This Guide Covers

• Multi-point locking espagnolette bolts are standard on uPVC — ensure all shoot bolts are engaging
• Window restrictors prevent windows being opened from outside beyond 100mm — cheap and effective
• Locking window handles replace standard handles and require a key to open — from £15–£35 each
• For sash windows: sash stops and dual screws are the most effective low-cost security upgrades
• Anti-snap cylinders on locking handles provide the same protection as door cylinder upgrades

Introduction

London homeowners face unique challenges when it comes to glazing — from period properties with sash windows in conservation areas, to modern developments requiring structural glass installations. Getting the right advice before you commit can save you significant time and money.

At BuilderFix Glazing, we have completed thousands of glazing jobs across Greater London and Surrey — from emergency repairs in Kensington and Chelsea, to bespoke walk-on glass installations in Mayfair and Belgravia. This guide is based on real experience and the questions our customers ask us most often.

Photos From the Job

What Does This Typically Cost in London?

Costs vary depending on the type and size of work, the glass specification, frame material, and access. As a general guide, always obtain a free written quote before committing — this protects you from unexpected charges.

At BuilderFix Glazing, we provide free, no-obligation written quotes for all work. Our prices are transparent and fixed before we start — no surprises on the invoice.

What to Ask When Getting a Quote

• Is the price fixed, or could it change once work starts?
• What glass specification is included?
• Are all fixings, sealants and finishing included?
• What compliance documentation will I receive?
• What happens if there is an issue after completion?