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Verified ProOver 50 Reviews
We fit high quality double glazing and the next generation triple glazing, using only the best materials. Fully guaranteed...
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House of Glass

2 review(s)
Offers services in SIDCUP
House of Glass ltd are a genuine, family run, home improvement company specialising in replacement windows & doors , conse...
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Your Local Experts in Bespoke Home Improvements Looking to refresh your home with high-quality, custom-fitted windows, ...
Verified Pro
All aspects of building work and refurbishment, using quality tradesmen. We look after 4 Churches in the area and have an ...

Recent Window Installer Enquiries

13 Oct

uPVC Double Glazing

Hornchurch - RM12

Enquiry from: Caroline I

Start Date: Immediate

2+ windows Supply and install

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10 Oct

uPVC Double Glazing

London - E4

Enquiry from: Arshad A

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Multiple windows Supply and install

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10 Oct

Replacement Glass Only

London - E2

Enquiry from: Amandeep S

Start Date: Immediate

Crack on inside of double glazing window in bathroom - awkward to get to

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07 Oct

uPVC Double Glazing

London - SW15

Enquiry from: Homayoun F

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2+ windows Supply and install

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05 Oct

uPVC Double Glazing

Orpington - BR6

Enquiry from: Nickie S

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Multiple windows to be Supplied and installed

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01 Oct

Window Repair

London - SE8

Enquiry from: Zephyr I

Start Date: Immediate

Handle to window is broken/ hanging off, cant open window, blinds come out of runner

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29 Sep

uPVC Double Glazing

Morden - SM4

Enquiry from: Lorriane C

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2+ windows Supply and install

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27 Sep

uPVC Double Glazing

London - E4

Enquiry from: Abdullahi H

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2+ windows Supply and install

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26 Sep

uPVC Double Glazing

West Wickham - BR4

Enquiry from: Amy W

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Air conditioning, building maintenance

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24 Sep

uPVC Double Glazing

London - SE26

Enquiry from: Rose J

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2+ windows Supply and install

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22 Sep

uPVC Double Glazing

London - SE4

Enquiry from: Michael B

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Looking at various options 2+ windows Supply and install

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20 Sep

uPVC Double Glazing

London - E17

Enquiry from: David M

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Considering a range of options 2+ windows supply and install

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19 Sep

uPVC Double Glazing

Barking - IG11

Enquiry from: Mariusz J

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2+ windows Supply and install

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15 Sep

uPVC Double Glazing

London - N17

Enquiry from: Nicola G

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Looking at various options 2+ windows Supply and install

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14 Sep

uPVC Double Glazing

Morden - SM4

Enquiry from: Lorriane C

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14 Sep

Replacement Glass Only

Chislehurst - BR7

Enquiry from: Nadia W

Start Date: Immediate

Small velux one layer of glass shattered not high on extension slopped roof

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14 Sep

uPVC Double Glazing

London - N18

Enquiry from: Soraya S

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2+ windows Supply and install

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14 Sep

uPVC Double Glazing

Swanscombe - DA10

Enquiry from: Terri S

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2+ windows Supply and install

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11 Sep

uPVC Double Glazing

London - SE6

Enquiry from: Jo-beth R

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2+ windows Supply and install

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How much do Window Installer services cost?

How much do Window Installers cost? Prices for Window Installers in 2026 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 Sidcup is:

£1,977

Window Installer job Window Installer cost in 2026
Double glazing in Sidcup £1,050-£3,500
Upvc double glazing units only in Sidcup £800-£1,200
Triple glazing in Sidcup £1,050-£3,500
Aluminium windows in Sidcup £1,338-£3,188
Wooden window in Sidcup £3,750-£5,750
Aluminium windows supply only in Sidcup £2,600-£3,900
Upvc or wood porch in Sidcup £2,625-£4,025
Sash window in Sidcup £1,200-£4,000
Glaziers in Sidcup £57-£87
Secondary glazing in Sidcup £1,050-£3,500
uPVC Single Window in Sidcup £225-£345
Wooden sash windows in Sidcup £3,750-£5,750
Wooden windows supply only in Sidcup £2,760-£4,140
Aluminium repair in Sidcup £240-£360
Window repair in Sidcup £268-£402
Wooden window repair in Sidcup £320-£480

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Window Installer FAQs

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 is the Window Energy Rating (WER)?

The energy efficiency of windows is measured using ratings, varying from A, the most efficient, to G, the least efficient. This scheme is run by the British Fenestration Council (BFRC). To comply with Building Regulations you’ll need windows of energy efficiency at least level C.

Can the glass in a double glazed window be replaced?
Yes, the glass in a double glazed window can be replaced. The glass in a window, or sealed unit to use its proper name, is not permanently attached to your window frames so if it gets damaged but your frames are still intact, there’s no need to replace the whole window. The glass in your double glazed window might need to be replaced due to:
  • Impact from a stone or other object smashing the glass in a ‘bullseye’ effect
  • The result of a break-in
  • Extreme weather or changes in pressure causing a crack
  • The sealed unit being ‘blown’, meaning that it’s no longer energy efficient due to air leaking out
A lot of window installers will replace the glass in your double glazing for you, but you might need to get quotes from specialist glaziers too. Glaziers deal purely with the glass in windows rather than installing entire frames. It won’t take a professional very long to replace the glass in your window. They will remove the beading from around the window with a pallet knife or chisel, leaving the top one until last to keep the sealed unit stable. Then, they simply lift out the glass carefully and will discuss with you whether the removal of the old sealed unit is included in their quote. Next, they will brush away any dust and debris that’s made its way into the frame and place spacers at the bottom. They will then lift the new glass into the frame, making sure it’s completely square. When they’re happy, they’ll remove the spacers and replace the beading back in reverse order. You’ll notice the replacement glass in your new window straight away as draughts should be eliminated and you’ll be able to see clearly again!
Should I get all my windows replaced at once?

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.

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.

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.

how to fit a double glazed window?

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.

Are A-rated windows worthwhile?

On the grand scale of things there isn’t a huge difference between B-rated windows and A-rated windows. Consumer watchdog Which? have calculated an extra 6.5% would be saved on energy bills with A rather than B rated panes. Be aware that A rated windows are slightly more expensive, however.

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