The typical cost of double glazing is approximately £400-600 per window, so youâre looking at approximately £2,000 to install 4 double glazed windows in a flat, and up to and exceeding £5,000 for replacing all the windows in a standard-sized home.
| Avg. price low | Avg. price low |
|---|---|
| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£5100
£3825
£2550
£1275
£0
| Labour cost | £1,400 | |
| Material cost | £500 | |
| Waste removal | £100 |
Requests for quotations in Portsmouth in August 2026
Requests for Secondary glazing quotations in Portsmouth in August 2026. 0% change from July 2026.
Requests for Secondary glazing quotations in Hampshire in August 2026. 0% change from July 2026.
BAU UK are a complete home improvements specialists located in the South Coast, with focuses ranging from windows and doors to insulation and solar. Fully accredited, insured and trained in the latest technologies, our team can offer leading services...
Excellent Service
Doors, UPVC Windows, Conservatories & Orangeries. With over 35 year’s experience in the trade we use a range of premium REHAU® materials to achieve a high quality finish. We offer a 10 year insurance backed guarantee with peace of mind we get the...
Owner fitter, local company very polite, courteous and professional removed shoes, explained profiles and windows etc, ...
We offer an impressive range of external and internal doors - entrance and back doors, patio, French and bifold, we have the ideal choice that will suit your home.
very helpful and informative
We're a family run business providing bespoke extensions, conservatories, windows and doors and kitchen installations. on DJL Home Design &
very good communication and good offer
Test Valley Windows are installers of quality, bespoke PVCu windows, doors, conservatories and roofline products. A well established, company, we have been operating from Andover in Hampshire since 1995
Excellent service!, everything about the visit was perfect and we have decided to have our windows with Test Valley.
Portsmouth - PO6
Enquiry from: Rachael P
Start Date: Immediate
Call anytime. Number of windows: 7 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Portsmouth - PO3
Enquiry from: Matthew P
Start Date: Immediate
Call any time. Number of windows: 7 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Portsmouth - PO2
Enquiry from: Ruth G
Start Date: Immediate
What best describes your living situation? - Homeowner - Joint. How many windows are you considering replacing? - 1 Door (maybe 2 . What material do you require, UPVC? - upvc. What colour do you want ...
Portsmouth - PO6
Enquiry from: Jane F
Start Date: Immediate
Call any time. Number of windows: 3 Quote requested on windows, in PVCu, to be supplied and fitted.
Portsmouth - PO6
Enquiry from: Kelsar D
Start Date: Immediate
Call back anytime. Number of windows: 10 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Portsmouth - PO2
Enquiry from: Georgina C
Start Date: Immediate
Customer is looking to have new windows installed. They are unsure of options so would like to discuss. Confirmed interest via Customer lives in Portsmouth area 2+ windows Supply and install Please c...
Portsmouth - PO2
Enquiry from: Roxanne F
Start Date: Immediate
Customer made an online enquiry for replacement windows via one of our websites. Confirmed via . 2+ windows Supply and install Please call to arrange an appointment to quote.
Portsmouth - PO2
Enquiry from: Debra H
Start Date: Immediate
Customer in Portsmouth area made an enquiry for double glazing online. 2+ windows Supply and install Please call to arrange an appointment to discuss options
Portsmouth - PO2
Enquiry from: Carrie W
Start Date: Immediate
Customer is looking to have windows installed. They are unsure what options to go for so would like to discuss directly multiple windows to be Supplied and installed Please call to quote.
Portsmouth - PO6
Enquiry from: Prince O
Start Date: Immediate
Customer made an online enquiry for replacement windows via one of our websites. Confirmed via . 2+ windows Supply and install Please call to arrange an appointment to quote.
Portsmouth - PO6
Enquiry from: User W
Start Date: Immediate
Customer is looking to replace their windows. They are still considering options so please call to discuss what would be best for their home. Homeowner lives in Portsmouth area 2+ windows Supply and i...
Portsmouth - PO6
Enquiry from: Chloe M
Start Date: Immediate
Customer is looking to replace their windows. They are still considering options so please call to discuss what would be best for their home. Homeowner lives in Portsmouth area 2+ windows Supply and i...
Portsmouth - PO6
Enquiry from: Bekey S
Start Date: Immediate
Customer made an online enquiry for replacement windows via one of our websites. Confirmed via . 2+ windows Supply and install Please call to arrange an appointment to quote.
Portsmouth - PO6
Enquiry from: Sarah C
Start Date: Immediate
are you the property owner: owner of the property what level of service do you require: supply and installation of full unit property type: semi detached how many windows do you need: 4+ windows do y...
Portsmouth - PO1
Enquiry from: Dexter L
Start Date: Immediate
What best describes your living situation? - Homeowner - Joint. How many windows are you considering replacing? - 9. What material do you require, UPVC? - UPVC. What colour do you want them to be? - W...
Portsmouth - PO1
Enquiry from: Gurdial S
Start Date: Immediate
Call anytime Number of windows: 6 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Portsmouth - PO2
Enquiry from: Stephen P
Start Date: Immediate
Are you the home owner of that property? - Sole. How many windows are you considering replacing? - 5. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require d...
Portsmouth - PO2
Enquiry from: Cara W
Start Date: Immediate
I need 5 casement windows plus 2 bays with 3 windows each and a front door with an additional 2 windows surrounding the door.
Portsmouth - PO3
Enquiry from: Darren B
Start Date: Immediate
New bay windows, and 3 other windows to the front elevation of our house
Portsmouth - PO2
Enquiry from: Sue L
Start Date: Immediate
new composite door and windows each side of door! are you the property owner: owner of the property what level of service do you require: supply and installation of full unit property type: detached h...
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If you’ve got a problem with condensation and don’t have double glazing, you should find that getting new windows will help. Condensation is caused by warm air meeting a cold surface which then turns into water droplets. With two panes of glass, less heat will escape from your home and keep the window warmer, meaning when steam from the bathroom or kitchen touches your windows there should be less condensation.
Some properties are unable to have double glazing, especially those in conservation areas or listed buildings. To counter this problem and still benefit from a warmer home and cheaper bills, secondary glazing is an option. Secondary glazing is a second pane fitted inside your original window. Secondary glazing will still save you around £105 yearly.
By replacing the single glazed windows in your home you stand to make savings of around £170 each year. It’s not just the financial gain that makes double glazing attractive though and you can also save up to 680kg of carbon emissions annually. Over 20 years this is a saving of around £3,400 and 13,600kg of CO2.
Did you just purchase a double glazed window and confused about how to have it installed? Fitting the window yourself can be quite easy with the help of this step by step guide. However, if you lack proper training or experience, we’d recommend you reach out to a trustworthy professional who can guarantee the best results for help. That said, now let’s take a look at the process.
• Remove the old windows by detaching the old beading and glass window safely. Then make some interval cuts using a hand saw before using a crowbar to pry it out.
• Cut the external double glazed window seal. Once done, take a measurement of the window area’s width once empty. Then transfer the measurement to the window sil to face outside and cut using a handsaw.
• Seal the window sil. Add a bead of clear silicone along both inside lip as well as the centre to seal the sil.
• Screw the double glazed window to the sil. Position the window on the top of the lipped section that was siliconed. Then pre-drill them together and screw in three places. You should make sure the screws do not go totally to the sil’s bottom.
• Install the double glazed window. After successfully screwing the double glazed window to the sil, you can now fit in the double glazing. Make use of packers to make sure it’s even in the slot.
• Screw the uPVC window to the wall. If you’re happy and satisfied with the position of the window, you can then pre-drill through the frame of the window and the brick wall. Once done, simply screw it in place using masonry screws or Spax screw as they do not require crawl plugs in bricks.
• Seal around the window. To do this, simply fill any gaps with expanding foam, wipe out the excess and seal with silicone.
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