Blog>Expert Advice>On display: Peek inside this stunning glass extension
Last updated: 5 February 2025
On display: Peek inside this stunning glass extension
We showcase one of the standout features from our tour of the House with the Blue Shutters - the bold glass extension. Learn about costs and discover ideas and inspiration to help plan your own glazed addition.
A glass extension is a stunning property feature, combining architectural elegance with modern design.
During our tour of the House with the Blue Shutters, we loved having the opportunity to take a look around the first-floor glass extension.
Housing a luxurious ensuite bathroom to the guest bedroom, it's a true example of how a contemporary glass extension can work in harmony alongside a period home, transform an unused area, and create a sense of openness.
Considering a glass extension for your home? Read on for ideas, inspiration, average costs, and the practical details to be aware of.
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What is a glass extension and why build one?
A glass extension is a modern architectural feature that uses large expanses of glazing to create an open, airy addition to your home.
Whether purely glass or a combination of glazing and other materials, glass extensions enhance the natural light in a property and create a striking visual impact.
The benefits of glass extensions
Maximised natural light: A home filled with natural light is inviting and uplifting and reduces the need for artificial lighting
Indoor-outdoor living: Glass extensions create a more seamless connection with the outside space
Versatile design: The subtlety of glass makes it the perfect partner for any type of property - a listed cottage, period townhouse, or modern semi
Increased property value: A well-designed glass extension can boost your home's resale appeal
Glass extension ideas
We absolutely love how the homeowner has designed an extension with a difference in the House with the Blue Shutters.
A traditional extension could have been an option, but the idea to create a glass extension for the guest ensuite is inspired.
It brings a bounty of light into the space and adds a sense of luxury. And what's not to love about being enveloped by those garden views while getting ready for the day - or stargazing while relaxing in the bath at night?
Types of glass extensions
Glass is hugely versatile, and can be used for several different types of extension. If you like the idea of a fully-glazed addition, consider:
A side return glass extension
Popular in urban terraced homes, creating a glass side return or glass-roofed extension maximises the available space and adds tons of natural light.
A modern rear glass extension
Combining modern materials such as steel and aluminium to open up the back of a home, creating extra living space with a contemporary feel.
A glass porch extension
Set the tone for your home with a glass porch extension that will flood your property with natural light.
A glass room extension
Bathe the back of your home in warmth and light with the addition of a sunroom or garden room, with floor-to-ceiling glazing to enjoy the view of the outdoors.
Work with a local architect to create something special for your home
Get your ideas off the ground. Search your postcode to find architects who come highly rated in your area.
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Key practicalities of building a glass extension
A qualified architect, structural engineer, and experienced builder will be your dream team for creating a glass extension. To give you an idea of the key factors to bear in mind:
Planning permission and building regulations: Some glass extensions will fall under Permitted Development Rights, but it's likely you'll need planning permission. Building regulations will apply to several aspects of the build, including thermal efficiency, structural integrity, and safety
Glazing considerations: Choosing the right type of glass is crucial for energy efficiency and the comfort of your new space. Options include double or triple glazing, low-E glass, and solar control coatings
Ventilation and insulation: Unlike traditional conservatories, modern glass extensions incorporate advanced insulation techniques to prevent overheating in summer and heat loss in winter
Sustainability considerations
Sustainability is a key concern when planning an extension. Three ways to boost the sustainability of your glass extension include:
1. Energy-efficient glazing: Consider double or triple glazing with thermal coatings to maintain a comfortable indoor environment
2. Solar shading: Factor in ways to regulate the amount of heat entering your home while allowing the natural light in, such as integrated blinds or smart glass
3. Sustainable building materials: Combine glass with responsibly sourced timber or recyclable metal
How much does a glass extension cost?
It can be tricky to put a guide price on the cost of a glass extension as there are so many variables to consider, including:
The size, scope, and specifications of the design
The complexity of the build and whether specialist equipment, such as a crane, is required for installation
The cost of professional fees and services in your area
On average, expect glass extension costs to start at around £3,000 per m². Take a look at our glass extension cost guide for more detailed information.
Contact or pay a trade through Checkatrade and you’re covered by our 12-month guarantee of up to £1,000*
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If you have a breathtaking view to take advantage of, or you want to add light, space, and modern elegance to your home, you won't regret a glass extension.
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