Get an energy-efficient home with the best window replacement services in Glasgow!
Lately, one thing that’s been bothering me is how much the utility bills keep going up, especially in winter. You try to keep the house warm, and next thing you know, the heating costs are through the roof. I got fed up and started looking into proper fixes.
Turns out, insulation makes a big difference. That’s when I decided to get a professional to swap out the old windows for new ones that actually keep the heat in. It’s made a real difference!
While I was at it, I looked into the best window replacement companies in Glasgow and pulled together a list to help anyone else thinking about doing the same.
How much does it cost to have your windows replaced in Glasgow?
The cost to have your windows replaced in Glasgow is usually around £700 per window. Take note that your prices may vary quite a bit depending on the type of window, materials used, and how complex the job is.
1. Homeshield Scotland

Windows offered: Casement, tilt-and-turn, and vertical sliding sash
Address: 515 Lawmoor St
Phone number: +44 800 611 8118
Business hours: 9:00 AM – 5:00 PM (MON-FRI)
Homeshield Scotland is a window replacement company that caught my eye for its practical approach and solid guarantees. They offer uPVC and composite windows with double or triple glazing, all installed by their Glasgow crew.
What I liked was their 10-year insurance-backed warranty, which gives you proper peace of mind and even transfers if you sell. They also run a recycling scheme that knocks £2,500 off full-home replacements, though it’s more of a built-in discount than a rebate.
Financing is available too, with interest-free options and no deposit in some cases, which makes things easier if you’re budgeting.
That said, their professionalism could use some work. A few people I spoke to mentioned pushy sales tactics and a lack of response to their enquiries. If you’re considering them, it’s worth asking direct questions and getting everything in writing.
The service explained was brilliant and the demo window was very high quality
“Phoebe arrived on time and was very friendly and approachable. She was able to explain the service and products well. Phoebe was very honest, knowledgeable and was able to answer all our questions clearly. The service explained was brilliant and the demo window was very high quality. Looking forward to getting new windows throughout.”
– Dionne Harvey, Google Reviews
Managed to get the best deal for us
“Phoebe was brilliant in securing us the best deal to suit our needs. We had a very tight budget but still managed to get the best deal for us. Phoebe had amazing knowledge about windows and doors. She really knows her stuff! Looking forward to receiving them once I do, I will update this review.”
– Jake Francey, Google Reviews
2. RePlace Windows Limited

Windows offered: Casement, tilt and turn, sash, bay, acoustic glazed, and triple-glazed uPVC windows
Address: Tay House, 300 Bath St
Phone number: +44 808 500 0111
Business hours: 8:00 AM – 8:00 PM (MON-FRI)
RePlace Windows Limited helped me improve my home’s windows and insulation. What caught my eye was their free heat loss survey, which showed exactly where energy was escaping and what could be done to fix it.
I also got a free triple-glazing upgrade with the uPVC windows I chose, which felt like a good deal considering how effective they are at keeping heat in. Furthermore, it was a relief that they didn’t ask for a deposit, and I only paid once the job was finished.
It’s also worth mentioning that they offer financing, which I didn’t need but could be useful if you’re working with a tighter budget.
On the downside, they rescheduled my appointment twice, which was a bit frustrating. Also, their showroom is in East Kilbride, so if you live in the north, it takes some effort to visit if you want to see the windows in person before committing.
We absolutely love our new windows from RePlace Windows Limited
“We absolutely love our new windows from RePlace Windows Limited. The whole process was seamless from start to finish. The tradesmen were professional, efficient, and completed the work to a very high standard. Everything was done with care and attention to detail. We’re so pleased with the results. The windows look fantastic, doors look amazing and have really transformed our home. Great value for money too. Would highly recommend!”
– A Johnson, Google Reviews
We absolutely love our new windows
“We’re really happy with the service from Replace Windows. The whole process was quick, simple, and easy to understand. Scott made us feel really comfortable and was great to deal with throughout. The installers also did a great job. We absolutely love our new windows. They look amazing and have made such a difference to our home. Would definitely recommend!”
– Deirdre Andrews, Google Reviews
3. ALL UPVC Windows & Doors

Windows offered: Casement, tilt and turn, sliding sash, bay, bow, and fully reversible windows
Address: 2, Railway Ct, Lennoxtown
Phone number: +44 1360 600888
Business hours: 9:00 AM – 5:00 PM (MON-FRI)
With more than 25 years in the game, ALL UPVC Windows & Doors is another long-running Glasgow outfit worth considering. What stood out to me is that they offer repairs as well as full installations, which is helpful if you’re trying to keep costs down without cutting corners.
Their window range includes casement, tilt and turn, sash, bay, and fully reversible styles. Like a few others I’ve mentioned, they back their work with a 10-year warranty, which adds a bit of reassurance.
They also offer free measuring, so you’re not left guessing sizes or making awkward adjustments later.
One thing to keep in mind is that they can take up to a day to respond to enquiries. And since they don’t share pricing until after a full on-site consultation, it’s harder to compare quotes upfront.
Excellent quality and great service from start to finish
“Replaced windows and door, excellent quality and great service from start to finish, with David from sales to measuring and fitting. Guys were very friendly and efficient, they cleaned up after themselves and there is very minor decoration required! Quality and fitting, highly recommend this company.”
– Kirsteen Morrison, Google Reviews
The installation was perfect
“Just had my rear door and windows installed. The installation was perfect and the difference in the temperature in that area of the house is amazing. Second time I have used these guys.”
– Steve Mason, Google Reviews
4. Monteith Windows & Doors

Windows offered: Casement windows, bay windows, vertical sliders, sash, reversible windows, and more
Address: 33 Townsend St
Phone number: +44 141 846 1708
Business hours: 8:00 AM – 6:00 PM (MON-SAT)
If you have a unique design in mind for your new windows, Monteith Windows & Doors is worth checking out. They offer the usual styles like casement, bay, and vertical sliders, but they’re also open to fully bespoke designs tailored to your property.
They mainly source their materials from VEKA, a well-known German manufacturer with a solid reputation for quality. On top of that, Monteith backs their work with a 10-year warranty.
One thing I appreciate is that they don’t ask for a deposit. You only pay once the job is complete. They’re also easy to book, with evening and weekend slots available.
Just note that they only take cash or BACS payments, and if you want to visit their showroom, you’ll need to book ahead.
Very reasonable prices and top quality windows
“Outstanding service and attention to detail from Stephen. First class fitters. Excellent customer service from Stephen, nothing is too much. Very reasonable prices and top quality windows, doors and fittings. I would highly recommend Monteith Windows and Doors…we will be back when we need any other work. Can’t believe the difference it’s made to the house. Thank you.”
– Jacky Clark-Brynolf (Jack Digger), Google Reviews
If I could give Monteith Windows and Doors ten stars I would
“Stephen and his team installed three large windows in our previous house and we gave him five stars for professionalism, knowledge and price. We’ve since moved out of Glasgow to a flat with patio doors that initially closed silently but all of a sudden had to be banged closed. I reached out to Stephen for advice, do we need a lock man or door man? Without hesitation Stephen sent out his engineer the next day and within fifteen minutes the door was fixed at no cost. If I could give Monteith Windows and Doors ten stars I would. I have no hesitation in recommending this firm”
– Moira Leach, Google Reviews
5. Southside Window Systems

Windows offered: Casement, tilt and turn, vertical sliding sash, and coloured UPVC windows
Address: 55 Wiltonburn Rd
Phone number: +44 141 881 9911
Business hours:
8:30 AM – 4:00 PM (MON-THURS)
8:30 AM – 12:30 PM (FRI)
Southside Window Systems is another company that sources everything from well-known manufacturers. They’ve been around since 1997 and offer uPVC frames from the Rehau Total 70S range, along with glass options using Pilkington energiKare.
Their windows are tested to meet BS7412 standards, so you’re getting something that holds up against weather and wear. They also offer a 10-year warranty, which adds a layer of reassurance.
Furthermore, it’s nice that the quoting process is simple, and they offer it for free, which makes it easy to get started.
That said, a few people I’ve chatted with mentioned missed appointments, so it’s worth double-checking your booking. They also close early on Fridays and aren’t available over the weekend, so timing can be a bit limited.
Very happy with the quality of the windows
“Had all our flat doors and windows replaced—5 rooms in total. Excellent service and very happy with the quality of the windows. Tidy workers and all work carried out within the timescale promised. A few teething problems sorted out with no hassle whatsoever. Happy to recommend this company.”
– Lynn Thomson, Google Reviews
We are really pleased with all the care given by Southside Windows
“We are really pleased with all the care given by Southside Windows. All aspects from quote to installation were first class! We love our new windows and doors, I would highly recommend this hard working and efficient company.”
– Alex Frew, Google Reviews