How to transform your home with a glazed extension

Glazed extensions have been one of the revelations of the home improvements sector over the past decade or so.

In the 2000s and even the early 2010s, glazed extensions carried a stereotype of requiring a blanket to use comfortably in the winter, with headphones also needed to block out the sound of rain smashing against the roof, whilst in the summer, they were too humid to use at all. That’s without even mentioning the condensation.

Thankfully, new material developments mean that nowadays, glazed extensions can be used just as comfortably on the hottest or coldest day of the year. At Sherborne, we install glazed extensions with advanced thermal control systems, meaning they maintain temperatures between 18-22°C all year round.

Their appeal is clear, there’s nothing better than unwinding in a space full of natural light where you feel more at one with your surroundings, especially if you’ve spent the majority of your day sitting under intense artificial lighting found in an office. Our clients regularly use their glass extension as a place to watch birds, movies on the TV, or even as a work-from-home spot. We’ll explore them in more detail below.

What are the benefits of a glazed extension?

From extra living space to year-round comfort, a modern glass extension offers far more than just a pretty addition to your home. Here are some of the biggest perks we think you’ll love.

More natural light flooding into your home

This is the headline benefit, and it’s a big one. Our high-performance glass lets in up to 70% more daylight than standard windows, which cuts down on artificial lighting and helps the whole house feel brighter.

But it’s not just about looks. Exposure to natural light has been linked to improved mood, better sleep patterns and a boost in Vitamin D levels. Spending more time in sunlit spaces can help reduce stress, lift your energy and even support better focus when you’re working from home. It’s a real win for your wellbeing.

Genuinely useful extra living space

A glazed extension turns underused gardens, side passages or tired old rooms into a functional new space. Whether it’s a sun-soaked dining area, a quiet reading nook or a place for the kids to play, you’ll wonder how you ever managed without it.

A comfortable temperature, whatever the weather

Thanks to low-emissivity (low-e) glass, which is glass coated with an ultra-thin layer that reflects heat back into the room, and argon-filled units, heat loss can be reduced by around 30% compared to single-pane glazing. In simple terms, your room stays warmer in winter, cooler in summer, and your heating bills won’t go through the roof.

A front-row seat to the great outdoors

Stargazing on a clear evening, watching a summer sunset, enjoying the rain pattering on a glazed roof, a glass extension gives you a seamless connection with the outdoors without ever stepping outside. It’s outdoor living, but with all the comfort of being indoors.

What are popular uses for a glazed extension?

The beauty of a glazed extension is its flexibility. Here are some of the most popular ways our customers use theirs.

A relaxation retreat

A quiet, light-filled spot to read, unwind and watch the garden change with the seasons.

A home office

With more of us working from home, a glass room extension makes a brilliant office. The natural light keeps you alert and the separation from the main house helps with focus.

A bright, open kitchen

Extending your kitchen with a glazed structure opens up the heart of your home and creates a wonderful space for cooking, dining and entertaining.

A home gym

Working out surrounded by greenery beats staring at a basement wall any day.

A stargazing spot

With a fully glazed roof, your extension doubles as a planetarium on clear nights. Add a comfy sofa and you’ve got the perfect evening hideaway.

Are glazed extensions a good investment for UK homeowners?

Yes, a well-designed glazed extension can add up to 15% to your property’s value, making it a strong long-term investment. Beyond the financial side, you’re also gaining a versatile new space that improves your day-to-day life, and that combination is hard to beat.

Glazed extensions from Sherborne

At Sherborne, we’ve been designing and installing bespoke glazed extensions across Surrey, Hampshire, Berkshire and South-West London for over 30 years. Every project is tailored to your home and your specific needs, with no two installations exactly alike (unless there is one you’d like us to copy exactly, and we can!)

Our glass options include:

• Low-e glass to reduce heat loss and prevent overheating
• Self-cleaning glass that uses rainwater and daylight to break down dirt
• Solar-control glass to keep interiors cool during summer
• Triple glazing options for the highest thermal performance

Frame colours include classic white, anthracite grey, black, cream, rosewood, golden oak and natural oak – plus any RAL colour you fancy for our aluminium ranges.

We also factor in the practical stuff: planning permission, building regulations and special considerations for conservation areas. Our team has decades of experience navigating these requirements, so you can relax knowing your project is in safe hands.

uPVC frames

uPVC (unplasticised polyvinyl chloride) is a hard-wearing plastic that’s been a popular choice for window and door frames for decades. It’s brilliant at keeping heat in, requires barely any maintenance and offers excellent durability.

uPVC frames are a great pick when:

• You’re working to a tighter budget
• You want low-maintenance frames that don’t need repainting
• You’re after strong thermal performance at a sensible price point
• You like the look of classic, traditional styling

Aluminium frames

Aluminium frames are slim, strong and incredibly stylish. Because the material is so robust, the frames can be much thinner than uPVC, meaning more glass and more light. They’re also available in every RAL colour, so you can match your extension to your home down to the finest detail.

Aluminium frames work brilliantly when:

• You want a sleek, contemporary look
• You’re after maximum glass area and minimal frame
• You’d like a specific colour or finish
• You’re happy to invest a little more for premium aesthetics and longevity

Who are Sherborne?

We’re a family-run home improvement company based in Farnborough, set up by Chris and Claire Long back in 1990. Over the past three decades we’ve grown into one of the most trusted names in glazing across Hampshire, Surrey, Berkshire and South-West London, but our values of honesty, integrity and courtesy have never changed.

We work within a one-hour radius of our Farnborough HQ, giving us unrivalled knowledge of the local area and the homes within it. Our product range covers uPVC, aluminium and timber windows, composite and timber doors, bi-fold doors, conservatories, orangeries, solid roof conservatories, roof replacements and more.

We’re FENSA-Approved, Assure Certified Installers and BlueSky Certified, and we’ve won multiple industry awards including Best Installer: Residential at the GGP Installer Awards 2020 and Conservatory Installer of the Year at the G Awards (twice).

Ready to start planning your glazed extension? Pop into one of our showrooms, give us a call on 01252 370917 or email enquiries@sherbornewindows.co.uk, we’d love to help you bring your dream space to life.

Frequently asked questions

Can a glazed extension be used all year round?

Absolutely. A high specification glazed extension creates a genuinely efficient living space that’s comfortable in every season. Modern low-e glass, thermally broken frames and the option of underfloor heating mean your new room stays warm in winter and cool in summer, making a significant impact on how you use your home day to day.

What’s the difference between a glass box extension and a traditional conservatory?

A glass box extension uses structural glass, often with frameless structural glazing, to create sleek glass walls and a minimalist look. Traditional conservatories tend to feature more visible framework. Contemporary glass box designs are often the best solution for homeowners wanting a modern, architectural finish that flows seamlessly from an existing room.

Can a glazed extension work as a garden room?

Yes, glazed extensions make wonderful garden rooms. They blur the boundary between your living area and outdoor space, giving you the feeling of being in the garden while staying warm and dry. Whether you want a peaceful retreat, a hobby room or a sunlit lounge, it’s a versatile option.