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 Knebworth in August 2026
Requests for Secondary glazing quotations in Knebworth in August 2026. 0% change from July 2026.
Requests for Secondary glazing quotations in Hertfordshire in August 2026. 0% change from July 2026.
Here at WFS Anglia Ltd, we have built ourselves a fantastic reputation throughout Cambridge, Northamptonshire, Peterborough, Milton Keynes, Buckinghamshire and surrounding areas. This is based upon our perfect harmony between high quality workmanship...
Excellenc provided by Alex as a true professional. Recommend every time
Crystal is a uPVC Windows and Double Glazing manufacturer and installer. We have built a strong reputation in London and the South East for great value and exceptional service in the design, production and installation of quality uPVC Windows, Doors,...
online reviews scared me
We at Primary Windows & Doors with our 25 years experience in the industry feel our unique operation where we design, survey & install all ranges of products such as windows, doors roofline and conservatories is second to none. Our installations a...
Excellent from initial call to installation Price was very competative & more importantly the service & craftsmanship...
Waiting on measurements
Homestyle are an independent Oxfordshire company specialising in bespoke installs of windows, doors and conservatories. Every customer and every home improvement is unique and can be tailored to suit the most discerning of customers. We offer a high ...
Very professional
G&T is an independent construction and property consultancy working across all sectors of the built environment.
CompetTive price
Knebworth - SG3
Enquiry from: Lois L
Start Date: Immediate
Call any time. Number of windows: 8 Number of doors: 1 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Knebworth - SG3
Enquiry from: Sarah B
Start Date: 1 to 3 months
3+ windows UPVC Supplied and fitted Please contact to appoint House number - 21 Property owner at this address 10 windows to be replaced Please call her to book an appointment *
Knebworth - SG3
Enquiry from: Sarah B
Start Date: 1 to 3 months
3+ windows UPVC Supplied and fitted Please contact to appoint House number - 21 Property owner at this address 10 windows to be replaced Please call her to book an appointment *
Knebworth - SG3
Enquiry from: Stephen W
Start Date: Immediate
homeowner 15 windows 1 door UPVC Supplied and fitted 1-3 months please contact to appoint *
Knebworth - SG3
Enquiry from: Stephen W
Start Date: Immediate
Home Owner 6 windows UPVC Supplied and Fitted Please Contact to Appoint *
Knebworth - SG3
Enquiry from: H
Start Date: Immediate
Home Owner New Front and back door, back kitchen window, patio doors, small downstairs toilet window, upstairs wide and shallow bathroom window, ensuite bathroom window, 2 large and one smaller bedr...
Barnet - EN5
Enquiry from: Tazeen K
Start Date: Immediate
Customer made an online enquiry for new double glazing. Homeowner confirmed interest via SMS/ Considering a range of options Homeowner lives in Barnet area 2+ windows Supply and install Please call to...
Waltham Cross - EN7
Enquiry from: Carol H
Start Date: Immediate
3 bedroom, living room kitchen, bathroom and patio doors
Borehamwood - WD6
Enquiry from: Christina T
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 Borehamwood area 2+ windows Supply and ...
Enfield - EN2
Enquiry from: Rob F
Start Date: Immediate
Call any time. Number of windows: 10 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Waltham Abbey - EN9
Enquiry from: Christodoulos M
Start Date: Immediate
customer requested quotes for upvc double glazing from a window installer around . they are considering a couple of projects at the moment.call anytime to arrange appointment to discuss. the informati...
Barnet - EN4
Enquiry from: Paul F
Start Date: Immediate
Call any time. Number of windows: 5 Quote requested on windows, in PVCu, to be supplied and fitted.
St. Albans - AL2
Enquiry from: Lucette B
Start Date: Immediate
What best describes your living situation? - Homeowner - Sole. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do...
Hemel Hempstead - HP1
Enquiry from: Karen E
Start Date: Immediate
Customer in Hemel Hempstead area made an enquiry for double glazing online. 2+ windows Supply and install Please call to arrange an appointment to discuss options
Hemel Hempstead - HP1
Enquiry from: Silvia L
Start Date: Immediate
Customer is looking to have new windows installed. They are unsure of options so would like to discuss. Confirmed interest via email/SMS/ Customer lives in Hemel Hempstead area 2+ windows Supply and i...
Broxbourne - EN10
Enquiry from: Chris C
Start Date: Immediate
Replace two wood windows with upvc double glazing
Waltham Abbey - EN9
Enquiry from: Drusheila M
Start Date: Immediate
Customer made an enquiry for replacement double glazing via one of our websites. Looking at various options Confirmed interest via phone at 11:24 2+ windows Supply and install Please call to discuss o...
St. Albans - AL1
Enquiry from: Andre P
Start Date: Immediate
Call back anytime. Number of windows: 5 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.
Barnet - EN5
Enquiry from: Tazeen K
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 Barnet area 2+ windows Supply and insta...
Potters Bar - EN6
Enquiry from: Veronica M
Start Date: Immediate
Are you the home owner of that property? - Yes. How many windows are you considering replacing? - 0. What material do you require, UPVC? - upvc or composite. What colour do you want them to be? - Whit...
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Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.
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Love Local Quotes it's a big part of my Business I would recommend to anyone
One of the essential factors that makes a home truly a home is the convenience and comfort it provides us. As a result, we usually have a long to do list comprising things that come together to make sure our home is comfortable with ambient temperature at the very top of the scale of preference. After all, no matter how greatly designed your furniture and home decor is, it probably would amount for nothing if the temperature is either too hot or too cold. Some of the most common ways we incorporate to make the temperature a lot more conducive and warm during the winter months is by installing air conditioning system or through top notch insulation materials, but the fact still remains that a lot of heat would escape through the doors and windows. And that’s exactly the use of double glazing. So how exactly does double glazing work?
Double glazing basically works by preventing the escape of air and trapping it between two panes of glass. It’s the trapped air which serves as an insulation barrier which delivers 3 major functions. First and foremost, it stops the escape of heat through the window as the barrier created insulates the room from varying air temperatures at both sides of the glazing unit. The second major function is the double glazing works to keep down noise pollution coming from outside. While the third major function of double glazing I the fact that it helps minimize condensation which usually occurs on the single glazed windows’ inside as the cold outside air works to cool the warm air inside the house. When you install a double glazing window, the insulation barrier generated will work to stop the air temperature transmission which ultimately helps prevent the occurrence of condensation.
As well as keeping your home warmer and reducing noise, you’ll notice a saving on your energy bills from installing double glazing. If you install A++ rated windows in your home after having single glazing, you could save up to £120 year on your energy bills. The Energy Saving Trust has more information.
All new windows come with an energy efficiency rating from A to G. A is best, while G is the lowest rating. Anything above C is considered good, but these days most companies will be able to supply you with A-rated windows to maximise your energy efficiency.
Double glazing frames don’t just have to come in uPVC and are available in other materials including aluminium and wood too. Wooden or timber windows are more suited to properties with a traditional look and are often the frame of choice for listed buildings and homes in conservation areas. When properly maintained wooden windows can last well for years but can be up to three times more expensive than uPVC.Aluminium is the strongest and most durable option. As a metal it is highly resistant to the UK’s changing weather conditions and won’t rust, warp, crack or peel. Aluminium offers a modern appeal and is available in a range of colours.
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