Find a Window Installer you can trust in Northern Ireland.

Choose from 71 Window Installers, all rated by people like you.

Over 70 reviews & an average rating of 4.5/5 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 Pro

1st For Windows

0 review(s)
Offers services in NORTHERN IRELAND
From concept to completion, we handle all your window needs. Premier installation services for homes and businesses. Exper...
Verified ProOver 20 Reviews

Bell Windows (Ni)

25 review(s)
Offers services in NORTHERN IRELAND
Bell Windows was brought together in 2008 by Gordon Bell. Even though it is a relatively young company, Gordon himself has...
Verified Pro
Precision Contracts is a family run business and have been the foremost contractors of home improvements, building and roo...
Verified Pro

Lgs building solutions

0 review(s)
Offers services in NORTHERN IRELAND
Damp proofing woodworms rot treatment
Verified Pro

Jbrenovation

0 review(s)
Offers services in NORTHERN IRELAND
Hi im time served plasterer my company has been running since 2000 . We have worked on grade 2 buildings .so from that pla...
Verified Pro

Liam connor building and joinery

0 review(s)
Offers services in NORTHERN IRELAND
Construction or Refurbishment of existing Houses  • Attic Conversions  • Sun Rooms & Conserv...

Recent Window Installer Enquiries

12 Mar

Windows | uPVC

Belfast - BT4

Enquiry from: Claire A

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...

Post a similar request >

12 Mar

Windows | uPVC

Newtownabbey - BT36

Enquiry from: Gerard H

Start Date: Immediate

what best describes your living situation? - homeowner - sole. how many windows are you considering replacing? - 2. what material do you require, upvc? - upvc. what colour do you want them to be? - wh...

Post a similar request >

12 Mar

Windows | uPVC

Belfast - BT29

Enquiry from: Gerry M

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

Post a similar request >

11 Mar

Windows | Glazing

Belfast - BT5

Enquiry from: HELEN S

Start Date: Immediate

REPLACE PANES THAT ARE BAD WITH CONDENSATION

Post a similar request >

11 Mar

Windows | uPVC

Londonderry - BT48

Enquiry from: Frances W

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

Post a similar request >

10 Mar

Windows | uPVC

Castlederg - BT81

Enquiry from: E

Start Date: Immediate

What best describes your living situation? - Homeowner - Sole. How many windows are you considering replacing? - 2. What material do you require, UPVC? - upvc. What colour do you want them to be? - wh...

Post a similar request >

10 Mar

Windows | uPVC

Belfast - BT6

Enquiry from: Supannee O

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

Post a similar request >

10 Mar

Windows | uPVC

Omagh - BT79

Enquiry from: STEPHEN M

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...

Post a similar request >

08 Mar

Windows | uPVC

Belfast - BT17

Enquiry from: Cathy M

Start Date: Immediate

Call anytime Number of windows: 6 Number of doors: 3 Quote requested on windows and doors, in PVCu, to be supplied and fitted.

Post a similar request >

05 Mar

Windows | uPVC

Belfast - BT8

Enquiry from: Tony S

Start Date: Immediate

What best describes your living situation? - Homeowner - Sole. How many windows are you considering replacing? - 2. What material do you require, UPVC? - upvc. What colour do you want them to be? - wh...

Post a similar request >

05 Mar

Windows | uPVC

Larne - BT40

Enquiry from: Alan G

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

Post a similar request >

05 Mar

Windows | uPVC

Newry (South Armagh section) - BT35

Enquiry from: Martin M

Start Date: Immediate

customer in newry (south armagh section) areas is looking to do a couple of projects at the moment, and would like quotes for upvc double glazing.confirmed interest via sms and email at 05/03/2025 08:...

Post a similar request >

04 Mar

Windows | uPVC | Single Window

Craigavon - BT62

Enquiry from: Hilda W

Start Date: Immediate

Are you the home owner of that property? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. I assume you requir...

Post a similar request >

04 Mar

Windows | uPVC

Strabane - BT82

Enquiry from: Luisa C

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

Post a similar request >

04 Mar

Windows | uPVC

Omagh - BT79

Enquiry from: Lorraine M

Start Date: Immediate

What best describes your living situation? - -. How many windows are you considering replacing? - -. What material do you require, UPVC? - -. What colour do you want them to be? - -. Do you require do...

Post a similar request >

04 Mar

Windows | uPVC

Newcastle - BT33

Enquiry from: Trevor G

Start Date: Immediate

Call anytime. Number of windows: 4 Number of doors: 2 Quote requested on windows and doors, in PVCu, to be supplied and fitted.

Post a similar request >

04 Mar

Windows | uPVC

Belfast - BT12

Enquiry from: Mary C

Start Date: Immediate

Call anytime. Number of windows: 5 Quote requested on windows, in PVCu, to be supplied and fitted.

Post a similar request >

04 Mar

Windows | uPVC

Londonderry - BT47

Enquiry from: Len C

Start Date: Immediate

7 windows 3 windows downstairs 3 bedrooms 1 bathroom 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 yo...

Post a similar request >

03 Mar

Windows | uPVC

Seaham - SR7

Enquiry from: Chris S

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 Seaham area 2+ windows Supply and insta...

Post a similar request >

01 Mar

Windows | uPVC

Newtownards - BT23

Enquiry from: Lorraine A

Start Date: Immediate

call anytime number of windows: 10 number of doors: 2 quote requested on windows and doors, in pvcu, to be supplied and fitted. i am looking for quotes for 4+ windows are you the property o...

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 Northern Ireland is:

£2,657

Window Installer job Window Installer cost in 2025
Double glazing in Northern Ireland £900-£8,500
Upvc double glazing units only in Northern Ireland £800-£1,200
Triple glazing in Northern Ireland £900-£8,500
Aluminium windows in Northern Ireland £1,875-£2,875
Wooden window in Northern Ireland £3,750-£5,750
Aluminium windows supply only in Northern Ireland £2,600-£3,900
Upvc or wood porch in Northern Ireland £2,813-£6,013
Sash window in Northern Ireland £1,050-£9,000
Glaziers in Northern Ireland £57-£87
Secondary glazing in Northern Ireland £900-£8,500
uPVC Single Window in Northern Ireland £225-£345
Wooden sash windows in Northern Ireland £3,750-£5,750
Wooden windows supply only in Northern Ireland £2,760-£4,140
Aluminium repair in Northern Ireland £240-£360
Window repair in Northern Ireland £268-£402
Wooden window repair in Northern Ireland £320-£480

Related Window Installer searches in Northern Ireland

Window Installer FAQs

How to replace the glass in a uPVC window?
It’s not too difficult to replace the glass in a uPVC window, so if you’re a confident DIYer you could have a go at this yourself. We’ll go through the main steps on how to replace the sealed unit in a uPVC double glazed window:
  1. Using a rubber mallet and a strong pallet knife, remove the beading around the window. You might think they’re part of the frame, but they’re actually separate on the inside of the frame and can be taken out by using pallet knife to prize them out. Start with one of the longest beads first and leave the top bead until last.
  2. Give the glass a little tap to loosen it if it doesn’t come out straight away, then the whole unit should slide out easily. Just make sure it falls towards you and not back out onto the ground below!
  3. Clear any debris that has found its way into the frame with a brush. Add spacers at the bottom of the frame – these could be pieces of plastic.
  4. Get your new sealed unit (make sure you measure the glass before you buy one so you know which size to get) and carefully take it out of the packaging. Look for the British Standard mark – that shows you the bottom of the glass.
  5. Lift the glass into the frame, starting with the bottom first, and make sure that it fits square in the frame before taking the spacers out.
  6. Use a little washing up liquid to spread along the beads to make it easier when you slide them back into the frame. If they simply push and clip back in, you can use something like a block of wood to help you push them in correctly. Put them back in reverse order to how you took them out.
And there you go! If you’re feeling confident you can have a go at replacing the glass in your uPVC window yourself. But if you’ve got any worries, leave it to a window installer who will be able to do it in less than an hour.
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 much is window repair?

Accidents happen, and sometimes windows get broken. And that will lead to you wanting to replace just the glass in your window, rather than the whole frame. Also, as windows get older they can mist up on the inside, which means that the unit has ‘blown’ - so you’ll also need to replace the glass. But how much is it to replace the glass in a window? Luckily, if the frame of your window is in good condition, there’s no need to replace it, and this will reduce the cost. For an installer to fit a new pane of glass in a single glazed window, the average cost is £100, while a replacement double glazed sealed unit will cost an average of £110. Of course, as this is an average, if your window is very large you may spend more, and if your window is very small the price may be less. That's why it’s important to get a range of quotes so you can compare costs and get the best price. If you’re good at DIY, you may feel confident enough to have a go at replacing the glass in your window yourself. In that case, the cost of sealed unit and any other materials you need will cost an average of £57. It’s a significant saving, and if you think you can do it, then give it a try. However, if you’re in any way unsure, it’s best to leave it to the professionals. A window installer will be able to replace the glass in your window in less than an hour. Even though it costs more for a professional to do it, if you get it wrong and have to start over it will cost you more in the long run.

What if my home isn’t suitable for double glazing?

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.

how does double glazing work?

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.

Should I use a Fensa registered installer?

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.

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.

How long does it take to install one small double glazed window?

To install one small double glazed window, it will take anywhere between two hours and half a day. It will depend on whether one installer is fitting your window or two. And if you’re doing it yourself and don’t have any professional experience, it will take even longer.

When the window fitters arrive, they will make sure they’ve got safe access to the window and move any heavy furniture if they need to. Any good installer will lay down a dust sheet, but it’s a good idea to check that they’ve got one laid down before they start.

The first step any window installer will take is to double check the measurements of the new frame against your existing one. Hopefully it should match up, so then they’ll take the old window out. Then, they’ll insert the new frame into the aperture and bolt it into the concrete. They'll check it with a spirit level to ensure it’s even before moving onto the glass sealed unit.

The installer will place the glass into the aperture, then fit the beads to secure the glass in the frame. They’ll then use silicone and trim on the inside and outside to ensure the window looks perfect. You won’t be able to see where they’ve used sealants or trims because they’ll colour match them so it’s not noticeable. Then, they’ll tidy up all of their tools and the working area and let you know what needs to be done in terms of proving that the window meets building regulations. Most good installers are registered with a self-certification scheme, so will be able to issue a certification once the work is complete.

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 Northern Ireland.

Pick the right pro for you

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

Are you a Window Installer in Northern Ireland?

View our open Window Installer jobs near you

Join today
View Shortlist