Over 25 Years Experience
Home Extensions Leicester
Family Owned
& Operated
10 Year Guarantee
Family Owned
& Operated
10 Year Insurance Guarantee
Home » Home Extensions Leicester
Bespoke Home Extensions Leicestershire
Expand your home with a custom-built home extension in Leicester. Phair Windows offers stylish single-storey extensions with uPVC or aluminium windows and doors, full planning, surveys, and building work included.
Need more space but don’t want the stress of moving? A bespoke home extension from Phair Windows is the perfect way to create the room your family needs – whether that’s a larger kitchen-diner, a home office, or a bright new lounge.
We take care of everything, from design and planning to complete installation, so your project runs smoothly from start to finish. Every extension is made to measure, with your choice of uPVC or aluminium windows and doors, and finished in a style that complements your home beautifully.
With over 25 years of experience across Leicester and the East Midlands, our expert team combines trusted craftsmanship with modern design, ensuring your new space looks amazing and feels like part of your home from day one.









Why Homeowners Choose Phair Windows
- Expert design support from start to finish
- Fully managed, stress-free installation
- Bespoke extensions tailored to your home
- A+ energy-efficient glazing and insulation
- Built for year-round comfort
- Long-term guarantees for peace of mind
- Adds real space, value, and kerb appeal
- Choice of modern or traditional finishes


See Your New House Extension Before It’s Built
Our specialist CAD design service lets you visualise every detail of your home extension – from the layout and windows to your chosen roof type. You’ll see realistic 3D plans before any work begins, so you can design with complete confidence.
We’ll work closely with you throughout the process to make sure your finished extension is exactly how you imagined – a natural, beautiful continuation of your home.
Our Customer Reviews
We’re proud to be rated 4.9 out of 5 stars across more than 160 local homeowners across Leicestershire. Our reputation is built on honest advice, reliable service, and high‑quality workmanship that stands the test of time.
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

Trusted Experts in Property Extensions Leicester & the East Midlands
With over 25 years of experience, Phair Windows has built extensions, conservatories, and orangeries throughout Leicester, Wigston, and the surrounding areas. Whether you’re expanding your kitchen, building an outbuilding, or renovating your living space, we’re here to help you add light, comfort, and value to your home.
Our services cover everything from planning permission and groundwork to electricals, plumbing, and flooring. We’ll ensure every detail of your extension project complies with building regulations and fits perfectly around your home and neighbours.
The Phair Windows Difference
When you choose Phair Windows, you’re choosing a family‑run business that believes in craftsmanship, care, and clear communication. Whether you want to discuss ideas at home or visit our Leicester showroom, we’ll guide you at every stage.
Easy to Arrange
Book online for home, showroom, or phone consultations.
Family Values
Family‑run and trusted by homeowners since 1998.
Local Showroom
See our designs up close and meet our friendly team.
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
Request A Free Quote
Book your free home visit today and get an honest, no‑obligation quote for your home extension in Leicester. No pressure – just expert advice, friendly service, and a clear plan for your dream space.