Glazing Bars and Georgian Windows: Styles and Costs

Georgian and Victorian windows are defined by their glazing bars — the narrow timber or lead profiles that divide the sash or casement into multiple smaller panes. Getting them right on a period property makes a significant difference to both the appearance and the planning compliance of your windows.

What This Guide Covers

• Authentic divided lights: individual small panes of glass — original to pre-1900 windows
• Decorative glazing bars: applied to the inside or outside of a single large pane — cheaper
• Cottage bar vs Georgian bar: Georgian is slimmer and more refined; cottage bar is wider
• Conservation areas: many require authentic slim-section bars rather than applied decorative bars
• Modern slim double-glazed sash units can be specified with internal bars that look authentic

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.

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?