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Glazed Extensions in Leicester
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Affordable Glazed Extensions in Leicestershire
Our glazed extensions offer exceptional levels of energy efficiency using the latest A++ double glazing technology, are highly secure, and are virtually maintenance-free.
Phair Windows are a double extension installer in Leicestershire. Glazed extensions can add some extra living space and increase value to your home. If you’re looking for a new conservatory, information on porches for front doors, or to refurbish an existing conservatory roof, our experts are on hand to make the whole process stress-free.
Our experienced team will assist you from your initial quote, through the entire design process all the way to the aftercare once your extension is installed. Get in touch for our team for a free quote today!
Wide Range of Styles
Explore Glass Extensions

Front & Back Porches
All our porches, whether for a front door or back door, creates a stylish entrance that enhances the visual appeal and adds space to your property. Every project we construct is individually designed to your specific requirements, match your needs, and suit your home.

Conservatories
Conservatories create a stylish exterior that allows natural light to flood into your home. Whether you're looking for a UPVC or an aluminium conservatory, a glass roof or tiled roof, we have something to complement your taste and the style of your home.

Orangeries
An orangery goes beyond merely providing an additional room; it offers a space that is versatile and adaptable. With its warm, tranquil, and inviting atmosphere throughout the year, your orangery becomes the perfect living area in your home.

Conservatory Roof Replacement
If your current conservatory is not meeting expectations, consider a conservatory roof replacement. An upgrade can breathe new life into your glazed extension, transforming it into a warm and inviting space that becomes the heart of your home.
Bespoke Conservatories
Find Your Perfect Extension
- Leicester, Leicestershire
A glazed extension will provide a versatile space. We offer designs that can be anything you want them to be. Choose from traditional or contemporary styles to complement your home, and create your ideal living space to bring the outdoors in all year round.
- Built to last
- Safe and secure
- Increase house value
- Well insulated
- More space in your home

Add Light & Space
Increase Home Value
Looking to add a new conservatory and boost the value of your home? A high-performance double glazed conservatory or porch is an easy way of doing just that. By adding an extra room to your property, you will increase its desirability to any potential buyers.
Cold Out, Heat In
Insulated All Year
Our conservatories and Leicester porches incorporate the latest technologies in roof and double glazing design. The power of A++ rated double glazing will keep your conservatory insulated, draught-free and warm all year round, even during those cold winter months.
Safe & Secure
Low Maintenance
The most popular choice in the UK, uPVC conservatories and uPVC porches are both durable, low-maintenance, and easy to clean. uPVC is resistant to weathering, chemical rotting, corrosion, and abrasion making it a great material for any conservatory.
Conservatories Tailored To You
Highly Customisable
Whether you are looking for a modern conservatory or a traditional conservatory, we offer a wide range of styles, colours, and shapes to suit your home. Find your perfect glazed extension and create your ideal living space.
FAQs About Double Glazed Home Extensions
Do I need planning permission for a conservatory?
In most cases, planning permission is NOT necessary for all conservatories, but we always recommend that you check whether planning permission is required. Most conservatories can be built under the “permitted development” rules, but this is subject to certain conditions. Checking this will give you peace of mind and there’s also no risk of having your conservatory removed in the future if it is built illegally.
Do you need planning permission for a porch extension?
Generally, planning permission is not necessary for most porches, but we always recommend that you check whether planning permission is required. Most porches can be built under the “permitted development” rights, but this is subject to certain conditions.
Are conservatories safe?
Yes, conservatories by Phair Windows are very safe and secure. Our conservatories are made with premium grade materials and fitted with high-security locking systems to keep any possible intruders out.
Is a conservatory roof replacement worth the cost?
Yes, a conservatory roof replacement is worth the cost. If mould, leaking or poor insulation is an issue in your existing conservatory, a replacement roof could be a quick and cost-effective solution. It’ll improve thermal efficiency and in turn lower your energy bills. Contact Phair Windows for a free no-hassle quote for your double glazing in Leicester. We also have finance options available.
Home Improvement Experts
Your Journey With Phair Windows
Get in touch and we'll provide a FREE, no-obligation quote.
Final measurements are taken ensuring perfection every time.
All our windows and doors are expertly made in Leicester to order.
Our team install your windows or doors on a day that suits you.
Our friendly staff follow up with you and trade body registration is complete.
Finance Available
Since 1998
10 Year Guarantee
Fully Accredited
Free Online Quote
Professional, skilled, great communication from the on-site team - honestly, the best workmen I’ve ever had. They left the place tidy and neat. Thanks guys! They did a great job on a dreary, winter’s day with a smile. I love the new porch, which was a decent price. Honestly though, the sales guy Tom and the crew of Cal, Jake and Aaron were great. After having had a bad experience before with a different company, I’ll be using Phair Windows to replace my windows in the near future as well.
Beth Hendry
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What Do Our Customer's Say?
Check out some of our recent reviews from homeowners and customers across Leicestershire.
EXCELLENT Based on 173 reviews Posted on Stephen HollowayJanuary 6, 2026. We had two new doors fitted yesterday by Lincoln and Mick, lovely lads, very professional, answered all my questions, left no mess, I will use this company again.Posted on Kate BristowDecember 20, 2025. Excellent prices, excellent window fitters and nothing was too much trouble. Left all clean and tidy. Thoroughly recommendPosted on Deborah GowersNovember 28, 2025. Excellent service from Phair. I had several damaged and misted double glazing panels replaced. Michael, Lincoln and Jason did a great job, friendly and professional, left the area clean and tidy. Also measured up for a roof panel replacement with very difficult access. I would definitely recommend and use again.Posted on Jazzy BainsNovember 24, 2025. Phair Windows and where do I start… I’ve experienced Windows sales people who come over and show you a sample window out from their boot. Show how thermally efficient it is. I’ve had Safe Style, Anglian and Everest visit my old house and new. (These companies are now under one roof).They sell you the dream. Try to make you sign up on the spot by calling their Manager. From experience the windows could be the best ever but it’s the way the fitters fit them is what makes them efficient. Now enough of the waffle…. I looked up Phair Windows via Google reviews. Tom came and visited and he was straight to the point. Told me the price and no dramatic sales pitch. Suggested that we have a hole cut out in the living room and have a window fitted. This was because the window we had was awkwardly positioned in the living room. So instead of bricking up and centralising the window we could have ‘twin’ windows side by side . He sold me the dream and gave him the deposit. I have to admit I was worried as I had given the deposit and what the end product would look like. I made a visit to their show room and they seemed legitimate enough. I only come across this company via Google reviews and had no friends or family that actually had any dealings with them. One of their surveyors, Jake came around and checked if everything was ok and suggested a few tweaks. Another friendly chap. We worked together via email on some window designs and how they would end up looking. Fast forward 8 weeks or so and the fitters came promptly on the scheduled date of install. I got to be honest I wasn’t holding my breath because of my past experiences with Safe Style. They came, they fitted and went. There was a slight technicality with the builder they employed to make the cut out in the living room. This was due to the heavy rain and even though I was not happy but I suppose that was out of anyone’s control. Jake came along on the day to apologise for the builder not doing the job on the set date and honoured me the duraboards for the window sills free of charge for the inconvenience caused. When the builder eventually came he cut out the wall and matched the arched brick work against the other window to perfection. He screwed on the window to the brickwork but was slightly protruding out but barely noticeable. This was because there was only one layer of brick and looks like he couldn’t go further back to match the other window. After his job was done the lads came back to complete the window and fit the new sill. As the window was slightly set back from the living room the cill did not look aesthetically pleasing. Without hesitation they went back to their depo and brought back a wider cill which fitted perfectly all within an hour. All these obstacles was probably due to having a window cut out but these lads overcame them all and acted professionally and kept me in the loop throughout the installation process. They are window fitters and not builders and have done an astounding job. They are a true credit to the company. It’s a shame I don’t recall all their names but hand on heart they were all pleasant gentleman who worked as it was their own home. I did have reservations from the very start of employing a window company that I never heard of but they made me feel reassured throughout the window installation process. I can 101% recommend this company and will approach them in the future when I need windows fitting for a future extension. Great job Phair Windows ❤️Posted on James RileyNovember 18, 2025. Truly Amazing from start to finish, customer service was outstanding as well as the work carried out. The guys done an amazing job and i couldnt be more pleased with the finished product. Great value for money. Well done Phair WindowsPosted on Chloe DooreNovember 14, 2025. Just had our windows done. Fsntastic service. Would definitely recommend🙂Posted on Chimeratech14November 14, 2025. We had a window replacement, the team whom done it were very professional and knowledgeable about the task on hand. We also want to do a special shootout for Mike who was expecially friendly and and nothing was too much for him. If anyone requires any work done, please put Phair Windows as the number one choice.Posted on Garry ScottNovember 14, 2025. just had me windows done and couldn't be happier from start to finish 10/10Posted on Alex StevensonNovember 13, 2025. Fantastic servicePosted on Jordon LamontNovember 13, 2025. Brilliant Service from start to finish
Serving Leicester, Leicestershire and the Surrounding Areas
Wherever you live in the East Midlands, home improvements from Phair Windows will help to transform your residential or commercial property. For years, our double glazing specialists have been serving locations such as Oadby, Aylestone, Wigston, Hinkley, Market Harborough, Nuneaton, Lutterworth, Loughborough, Coventry and Warwickshire.