Find a Window Installer you can trust in Grantham.

Choose from 61 Window Installers, all rated by people like you.

Over 171 reviews & an average rating of 4.6/5 stars, you'll find the right pro

Choose and shortlist

Use the shortlist button to select up to 4 tradespeople, enter your project details and press send

or

Keen to get on with the job?

Get up to 4 quotes from local Window Installers near you

View Shortlist
Verified ProOver 10 Reviews

The Window Company

13 review(s)
Offers services in GRANTHAM
The Window Company have been trading since 2001 in the East Midlands area, offering a bespoke service for windows, conserv...
Verified ProOver 50 Reviews

ALL Weather Roofline

53 review(s)
Offers services in GRANTHAM
AWR have years of experience in creating stunning home improvement products, carefully crafted right here in the UK to off...
Verified Pro

Build fix & Plaster

0 review(s)
Offers services in GRANTHAM
We have many years of experience working on extension projects of our own, or sub contracting onto other projects with our...

Recent Window Installer Enquiries

22 Aug

Windows | uPVC | Single Window

Grantham - NG31

Enquiry from: Mehran G

Start Date: Immediate

are you the home owner of that property? yes how many windows are you considering replacing? 2 what material do you require, upvc? yes what colour do you want them to be? white do you require doors if...

Post a similar request >

20 Mar

Windows | uPVC

Grantham - NG32

Enquiry from: Margaret K

Start Date: Immediate

Are you the home owner of that property? yes How many windows are you considering replacing? 1 What material do you require, UPVC? UPVC What colour do you want them to be? whitE Do you require doors...

Post a similar request >

15 Mar

Windows | uPVC

Grantham - NG31

Enquiry from: P

Start Date: Immediate

Are you the home owner of that property? yes How many windows are you considering replacing? 5 What material do you require, UPVC? upvc What colour do you want them to be? - Do you require doors If so...

Post a similar request >

15 Mar

Windows | uPVC

Grantham - NG31

Enquiry from: Joanne H

Start Date: Immediate

Are you the home owner of that property? Sole How many windows are you considering replacing? 4 What material do you require, UPVC? upvc What colour do you want them to be? - Do you require doors If s...

Post a similar request >

09 Mar

Windows | uPVC

Grantham - NG31

Enquiry from: Heidi W

Start Date: Immediate

Customer in Grantham area made an enquiry for double glazing online. 2+ windows Supply and install Please call to arrange an appointment to discuss options

Post a similar request >

27 Jan

Windows | Aluminium | Supply

Grantham - NG31

Enquiry from: Lucy B

Start Date: Immediate

Gordon, would you price for new windows and front door and french doors on bungalow we are renovating in Grantham, if you would can we arrange a time for you to come and look whats needed, we are repl...

Post a similar request >

29 Nov

Windows | uPVC

Grantham - NG31

Enquiry from: Caroline H

Start Date: Immediate

one sash window and 2 top opener windows. are you the property owner: owner of the property what level of service do you require: supply and installation of full unit property type: terrace how many w...

Post a similar request >

24 Aug

Windows | uPVC

Grantham - NG31

Enquiry from: Umesh P

Start Date: Immediate

customer in grantham area has requested that we arrange quotes for their upvc double glazing project.mr are considering various options and would like to discuss with a window installer directly.pleas...

Post a similar request >

13 May

Windows | uPVC

Grantham - NG33

Enquiry from: Patricia D

Start Date: Immediate

*homeowner 2+ windows upvc supplied and fitted please call to appoint

Post a similar request >

05 May

Windows | uPVC

Grantham - NG31

Enquiry from: Gerry M

Start Date: Immediate

customer made an enquiry for upvc double glazing and confirmed on the quotatis site they would like quotes from a window installer.mr lives in the grantham area and would like a call to discuss option...

Post a similar request >

19 Jan

Windows | uPVC

Grantham - NG31

Enquiry from: Clayton S

Start Date: Immediate

replacement of all doors/windows and facias 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 ...

Post a similar request >

13 Jan

Windows | uPVC

Grantham - NG33

Enquiry from: Joanne H

Start Date: Immediate

customer in grantham area has requested that we arrange quotes for their upvc double glazing project.miss are considering various options and would like to discuss with a window installer directly.ple...

Post a similar request >

10 Dec

Windows | uPVC

Grantham - NG31

Enquiry from: Michelle D

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 property type: semi detach...

Post a similar request >

20 Nov

Windows | Aluminium

Grantham - NG32

Enquiry from: Terence C

Start Date: Immediate

customer in the grantham area made an enquiry a couple of projects including aluminium windows.call anytime and arrange an appointment to discuss. below is some details about this project: are you the...

Post a similar request >

20 Nov

Windows | Glazing

Grantham - NG32

Enquiry from: Terence C

Start Date: Immediate

large double glazed unit has shattered and needs to be replaced are you the property owner: owner of the property property type: detached are you looking for glaziers: yes how many units do you do you...

Post a similar request >

08 Nov

Windows | Wooden | Supply

Grantham - NG31

Enquiry from: John M

Start Date: Immediate

Eight double glazed units (310 x 335) to go into existing wooden front door

Post a similar request >

30 Oct

Windows | uPVC

Grantham - NG31

Enquiry from: Prabhjot K

Start Date: Immediate

Customer made an online enquiry for new double glazing. Miss confirmed interest via Considering a range of options Miss lives in Grantham area 2+ windows Supply and install Please call to arrange ap...

Post a similar request >

20 Aug

Windows | uPVC

Grantham - NG31

Enquiry from: Robert B

Start Date: Less than one month

best time: any work type: upvc windows and doors

Post a similar request >

12 Jul

Windows | uPVC | Repair

Grantham - NG32

Enquiry from: Mr B

Start Date: Immediate

bifold door is jammed in closed position. free quote please to repair/service. are you the property owner: owner of the property property type: detached what service are you looking for: other how ma...

Post a similar request >

20 May

Windows | uPVC

Grantham - NG33

Enquiry from: Kathleen P

Start Date: Immediate

customer made an online enquiry for upvc double glazing and confirmed on telephone and email they would like a call with a window installer to discuss prices.please call to arrange an appointment to q...

Post a similar request >

How much do Window Installer services cost?

How much do Window Installers cost? Prices for Window Installers in 2025 can differ relying on the kind of task that you require to have performed in your house. It's the inquiry we get asked a whole lot "how much do Window Installers charge?". It's generally very good to have an idea of how much a Window Installer are going to likely charge for their services. Prices will probably rise and fall based upon the products and also the tradesman selected. The table reveals the sorts of service that Window Installers typically do and also the typical cost range of these jobs. Some tasks take longer to complete than others so prices do fluctuate by task.

View our Window Installer cost guide View our Window Installer advice

The average price
of a Window Installer in Grantham is:

£2,082

Window Installer job Window Installer cost in 2025
Double glazing in Grantham £1,500-£5,000
Upvc double glazing units only in Grantham £800-£1,200
Triple glazing in Grantham £1,500-£5,000
Aluminium windows in Grantham £1,875-£2,875
Wooden window in Grantham £3,750-£5,750
Aluminium windows supply only in Grantham £2,600-£3,900
Upvc or wood porch in Grantham £2,625-£4,025
Sash window in Grantham £1,800-£6,000
Glaziers in Grantham £57-£87
Secondary glazing in Grantham £1,500-£5,000
uPVC Single Window in Grantham £225-£345
Wooden sash windows in Grantham £3,750-£5,750
Wooden windows supply only in Grantham £2,760-£4,140
Aluminium repair in Grantham £240-£360
Window repair in Grantham £268-£402
Wooden window repair in Grantham £320-£480

Related Window Installer searches in Grantham

Window Installer FAQs

Where can I get one double glazed window?

Most window installers will be able to provide you with one double glazed window and fit it for you. If you’re replacing one double glazed window in your home, ask them to try and source the same windows that you already have or find one that’s very similar. Externally, you probably won’t be able to notice the difference, but if your existing windows are very old there may be some exterior discolouration and the locks and handles might look slightly different.

If you want one double glazed window so you can fit it yourself, there are lots of online companies that can supply you with one window. However, window fitting is a skilled trade and you might want to consider whether you have the right tools and experience to fit it yourself. Of course, you’ll save money on installation costs, but if something goes wrong, you might end up shelling out to get it fixed anyway.

The other thing to consider is that any replacement windows need to be certified that they meet Building Regulations. If you fit the double glazed window yourself, you’ll need to apply to your local council building control officer to get a certificate that confirms that you fitted the window within the regulations. You’ll have to pay a fee for this, and it will be even more expensive if Building Control say that the window hasn’t been fitted within the regulations and you have to start again.

The alternative is to ask a reputable window installer that is registered with a self-certification scheme, like FENSA, to install the window. That means that they can self-certify that the window meets building regulations once they’ve finished the installation.

How to fit aluminium double glazed window?

Whether you’re hiring a professional to replace your double glazing or are considering DIY, it’s a good idea to know how to fit a double glazed window.

You need to start by assembling your window. Fit any handles and cut the outer sill to size by measuring the outer wall depth. Then, screw the outer sill to the window frame and attach the frame fixers. Screw the ventilation grilles onto the inside of the frame and fix the vents on.

Next, you need put the window into place, using spacers to wedge it in. Use a spirit level to check it’s level horizontally and vertically, adding extra spacers if needed. Then, fix the frame into place at each fixing point using a drill, wall plugs and screws. Measure and cut the interior sill, and check that it’s level, adding spacers if needed. Then fix it using screws, masonry nails or adhesive.

Finally, fill in any wide gaps with foam filler and small gaps with sealant. You can get interior and exterior trims to cover these up, making your window look neat and professional.

How long do double glazed sealed units last?
When it comes to how long double glazed sealed units (the glass inside the window) last, a lot of it is down to the quality of the glass and the environment that your windows sit in. It’s not uncommon for your window frames themselves (especially if they are uPVC) to last longer than your sealed units. Sealed units are called that because they’re two panes of glass sealed together with an air gap in between. They use what’s called a ‘perimeter seal’ to protect the air gap between the panes, and is usually made of butyl mastic which retains a desiccant within a perforated metallic spacer bar. The desiccant’s job is to absorb any moisture which finds its way into the air gap to stop your window from misting up on the inside. When a sealed unit fails, or is ‘blown’, it’s usually because moisture builds up around the seal and causes it to fail. Sealed units won’t last forever, so you will eventually end up with condensation inside the panes of your double glazing, but in an ideal environment your double glazed sealed units could last up to 30 years, with some manufacturers claiming as long as 40 years. But they do require a bit of maintenance and the position of your windows will also make a difference as to how long they last. There are a few things that determine how long a sealed unit will last:
  • Climate - If your window faces south, it will be subject to direct sunlight for a lot of the day. This tends to cause the sealed unit to fail more quickly – a south-facing window may last between 10-25 years. This is because the spacer bars will twist as the temperature rises and causes the adhesive holding them together to eventually fail.
  • Moisture - Windows in kitchens and bathrooms tend to fail more quickly because they come into contact with moisture more often. For example, if water gets on your windowsill when you shower, the seal around the glass will come loose more quickly if it’s constantly wet.
When you replace the sealed units in your windows or get completely new double glazing, make sure you choose an installer that uses quality products and will take all the steps to ensure that your sealed units are kept away from moisture as much as possible.
Will double glazing stop condensation?

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.

how much are new windows?

Are you about to replace your old windows and wondering just how much it’ll cost to have a new one fitted? If yes, then you’ve come to the right place! The question is a very straight forward one, however a direct answer can not be provided as determining window prices for a replacement project can be a very tricky challenge. With a plethora of influencing factors that can play a key role in the price of both materials and labour to be used, it could be extremely hard for a window installer to provide a cost estimate without paying you a visit beforehand.

The factors that can go a long way in determining the price of your new window includes the size of the window, frame material, style chosen, your location, rates charged by the window installer (these rates can be different from an installer to an installer, so it’ll probably be in your best interest to compare quotes to identify the most competitive price) as well as the type of glass required.

Generally, for a small flat featuring four windows, the average cost for new windows would be between the range of £2,100 to £2,300. This range provided covers the cost of double glazed uPVC casement windows as well as the installation price. In the same tone, a home with up to 8 windows will have an average cost for window replacement between the range of £4,400 to £4,600, wile also taking into account the installation price. Whereas a house comprising 10 windows could begin at an average cost of window replacement between the the range of £5,200 to £5,500, and a 15 window home will be between the range of £8,400 to £8,600. it should be noted that the aforementioned figures only include the standard number of windows with a uPVC frame and the installation cost.

What are the other double glazing options?

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.

What is double glazing?

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.

how much does double glazed windows cost?

Are you looking to replace your old window for a new double glazed window and wondering what it’s going to be the cost? Well, the double glazed windows market is a very competitive one in the UK with varying prices across the country. Therefore, if you shop around you’re most likely to find something that’ll fit your budget both products and quality wise.

As you would have expected, the more windows you required the more money you are going to spend. However, the cost per window is likely going to be lower depending on the number of windows you purchase. Several double glazed windows come with a 10 year warranty but it’s advisable to also obtain a solid workmanship warranty which provides coverage for any potential problems for a good period of time upon installation.

To determine the cost of double glazed windows, there are so many things to put into consideration that just the primary dimensions of the window itself. Other factors that works to decrease or increase the cost of the project includes the frames’ quality as well as the material used. For example hardwood can be quite high priced when compared to uPVC.

The number of opening windows within the frame can also play a huge role in the cost of the windows as well as the type of the glass. The cost of a double glazing window usually ranges between £100 to £3,200 per window, depending on the available options.

To have a more accurate estimate of the cost of a double glazing window, you’ll need a obtain a survey from a double glazing installer who can take into account any possible complications that may arise when installing your windows while also giving an advise on the most suitable window style for your property.

Window Installer help and advice

How it works

Tell us about your Window Installer project

Answer a few quick questions to help us match you with the right Window Installer

Get up to 4 free quotes

Receive no-obligation quotes from 4 Window Installers working in Grantham.

Pick the right pro for you

Compare prices, customer reviews and services, and hire the right Window Installer.

Are you a Window Installer in Grantham?

View our open Window Installer jobs near you

Join today
View Shortlist