Designing Bespoke Georgian Windows: Every Option Explained
Bespoke Georgian windows are about far more than getting the size right. From the style of the glazing bars to the handle in your hand, almost every detail can be tailored to your home.
This guide walks through each choice in the order we usually discuss them with clients, so you can plan windows that look and work exactly as you want.
Why choose bespoke Georgian windows?
Every house has its own proportions, brick or render, and street character. Made to measure Georgian windows let the grid, frame and colour respond to those details rather than forcing a standard product into the opening.
They also let you balance heritage looks with modern comfort, choosing the glazing, ventilation and hardware each room needs.
Glazing bars and sightlines
True divides or astragal bars?
The grid is the signature of Georgian bar windows, and there are two ways to create it:
True glazing divides: the window profile itself separates the panes for an authentic Georgian look. On the Origin range we install, these are available on the OW70 Slimline window.
Astragal bars: a slim aluminium profile fixed to the glass to replicate the grid. Steel or lead-effect alternatives can also be applied for a different character.
Slim or flush frames?
Origin OW70 Slimline: 65mm sightlines to maximise glass and daylight, available in casement, bay and fixed frame designs.
Origin OW80 Premium: a slightly wider sightline with a flush casement finish inside and out, available as casement, French, tilt and turn, bay and gable windows.
If views and light are your priority, the slimline option usually wins. If you love the look of a flush sash, the premium system is worth seeing in person. Our guide to Georgian French windows shows how the OW80 works in a French configuration.
Colour and finish
There are more than 150 RAL colours to choose from, including pastel and muted greens, off-whites, deep greys and burgundy. Dual-colour frames let you match your interior on the inside and your brickwork or render on the outside.
As a starting point:
Jet black gives a crisp contrast against red brick.
Pebble grey sits well with limestone or pale render.
Muted greens and off-whites suit softer, more traditional schemes.
We always suggest viewing colour samples against your own walls in daylight, as shades can look very different outdoors.
Hardware, ventilation and safety
Handles
Traditional monkey tail and pear drop handles complete a heritage look, while sleek modern handles suit contemporary interiors.
Restrictors and secure ventilation
Opening restrictors limit how far a sash opens, which is useful for children's rooms and upper floors. For secure ventilation, a tilt and turn window lets air in through a small, restricted gap.
Trickle vents
Trickle vents in the top of the frame keep fresh air moving while the window stays closed and locked. They are especially useful in kitchens and bathrooms, where they help manage condensation.
Glazing and thermal performance
Modern thermal breaks reduce heat transfer through the frame, and you can choose double or triple glazing. Origin quotes U-values as low as 0.8 W/m²K for the triple-glazed OW80 Premium, and around 1.2 W/m²K for the OW70 Slimline.
For context, replacement windows in England need a U-value of 1.4 W/m²K or better. We will advise on the best glass for each room, including options for noise or security where needed.
Planning checklist
Before you finalise your design, run through these points with your installer:
Have the bar layout and proportions been drawn to scale on each elevation?
Is the grid consistent across the house, or deliberately different on an extension?
Which rooms need restrictors, trickle vents or tilt and turn opening?
Have you seen the colour sample outside against your walls?
If you are in a conservation area, have you checked with your local planning authority?
For more on the casement style itself, see our guide to Georgian-style casement windows.
Frequently asked questions
How long do bespoke Georgian windows take?
Every window is made to order, and Origin aims to work around customer and installer timelines. We agree a realistic schedule with you at survey stage and plan manufacturing and fitting around your project.
Are Georgian windows hard to clean?
Powder-coated aluminium needs very little care. The bars take a moment longer to wipe than plain glass, but a soft cloth and warm soapy water are usually all you need.
Do Georgian windows suit modern homes?
Yes. A symmetrical grid can add character and warmth to new builds and extensions as well as period properties.
Start designing your windows
Bespoke Georgian windows reward careful planning, and our team will guide you through every option, from bars and sightlines to colour and glazing. You can also explore our window range for inspiration.
Book a free consultation and start designing windows made for your home.
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