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 |
£3200
£2400
£1600
£800
£0
| Labour cost | £1,400 | |
| Material cost | £500 | |
| Waste removal | £100 |
Requests for quotations in Northwood in August 2026
Requests for Secondary glazing quotations in Northwood in August 2026. 0% change from July 2026.
Requests for Secondary glazing quotations in Middlesex in August 2026. 0% change from July 2026.
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
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
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...
Had to phone several times to try to catch me in. Salesperson came this morning (10th March). Sensible, factual, clea...
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
Northwood - HA6
Enquiry from: S
Start Date: Immediate
Customer made an enquiry for replacement double glazing via one of our websites. Looking at various options Confirmed interest 2+ windows Supply and install Please call to discuss options and arrange ...
Northwood - HA6
Enquiry from: Aaroni K
Start Date: Immediate
Sell 1 Times Are you the home owner of that property? yes How many windows are you considering replacing? - What material do you require, UPVC? upvc What colour do you want them to be? unsure Do you ...
Northwood - HA6
Enquiry from: Sunil A
Start Date: Immediate
Sell 1 Times Are you the home owner of that property? yes joint How many windows are you considering replacing? 4 What material do you require, UPVC? upvc What colour do you want them to be? unsure D...
Northwood - HA6
Enquiry from: Parneet K
Start Date: Immediate
Customer living in Northwood area made an enquiry for double glazing quotes via one of our websites. Customer confirmed interest via / SMS at 17:06/ email at 17:06 Mrs needs advice on options 2+ wind...
Northwood - HA6
Enquiry from: Denise B
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. are you the...
Northwood - HA6
Enquiry from: Denise B
Start Date: Less than one month
best time: any work type: upvc windows and doors are you the property owner: owner of the property what level of service do you require: supply and installation of full unit how many windows do you ne...
Northwood - HA6
Enquiry from: Suumit M
Start Date: Immediate
Call any time. Number of windows: 14 Quote requested on windows, in PVCu, to be supplied and fitted.
Northwood - HA6
Enquiry from: Raj S
Start Date: Immediate
are you the property owner: tenant (with permission) is the building: business agreed to receive upvc quotes: yes other forms: none please call to appoint
Northwood - HA6
Enquiry from: Paul C
Start Date: Immediate
are you the property owner: owner of the property is this for a residential or commerial building: domestic other forms: solar hot water, upvc double glazing agreed to receive quotes for selected pro...
Northwood - HA6
Enquiry from: Sebastian H
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 northwood area 2+ windows supply and i...
Northwood - HA6
Enquiry from: Sebastian H
Start Date: Immediate
looking to replace existing please call to appoint
Northwood - HA6
Enquiry from: Alex K
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 northwood area 2+ windows supply and install please ca...
Northwood - HA6
Enquiry from: Reena T
Start Date: Immediate
large window replaced and fittef
Northwood - HA6
Enquiry from: Tushar B
Start Date: Immediate
Are you the property owner: Owner of the property Is the work for domestic or commercial purposes: Domestic Other Forms: Garden Maintenance, Solar Electricity, uPVC Double Glazing Agreed to receive qu...
Northwood - HA6
Enquiry from: Gouri G
Start Date: Immediate
I require following double glaze windows at 2 flats, in conservation area) (a) 2 sash and 2 normal windows (2 @ 110cm[w] x 2@ 185cm[l] & 179cm[w] x 131cm[l]) respectively (b) 4 sash windows@ at anot...
Northwood - HA6
Enquiry from: Nilam P
Start Date: Immediate
Install 6 new double glazed windows I am looking for quotes for 4+ Windows Are you the property owner: Owner of the property What level of service do you require: Supply and installation of full uni...
Northwood - HA6
Enquiry from: David M
Start Date: Immediate
Homeowner 2+ windows UPVC Supplied and fitted Please contact to appoint
Northwood - HA6
Enquiry from: Jenny B
Start Date: Immediate
Homeowner 2+ windows UPVC Supplied and fitted Please contact to appoint
Northwood - HA6
Enquiry from: Chandra G
Start Date: Immediate
Home Owner Supplied and Fitted Call to Appoint
Northwood - HA6
Enquiry from: Jhanvi B
Start Date: Immediate
Homeowner 2+ windows UPVC Supplied and fitted Please contact to appoint
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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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Using a Fensa registered installer isn’t compulsory but it helps to protect you from cowboys and rogue traders. It will also make life a whole lot easier in regards to Building Regulations. Replacement windows must meet a certain energy efficiency rating and once fitted you need a certificate to show your installation complies. By using a Fensa registered company they’ll issue this certificate, otherwise you’ll need the council to look at the new windows.
You don’t have to, especially if you’re on a budget. If you’re only replacing some, it’s a good idea to get all the windows on one side of your property replaced at the same time, so they all look the same. Be aware, obviously, huge savings could be had by having a number of windows replaced at the same time.
If a window is double glazed, it has two panes of glass that have a space between them containing argon gas. The gas works as an insulator, keeping heat inside the house as well as reducing noise. It also strengthens the window.
Ultimately the double glazing company you use is responsible for the quality of work and to ensure your windows are of an excellent standard. This is why it’s important to get a warranty and use a Fensa registered installer. If problems emerge within a couple of years then it’s likely the installation was of a poor standard.Contact the double glazing company and have the issue repaired or new windows replaced. This doesn’t matter if you received a discount of free windows as part of the deal. As long as you entered into a contract the company is obliged to restore the windows.
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