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How Much Do Windows Cost? Replacement and Installation UK

Windows play a significant role in energy efficiency, insulation, and one’s overall quality of life. When the time comes for window replacement or installing new windows, understanding the cost involved becomes crucial. 

To get a free, accurate quote from an unbiased local engineer, fill out Warmable’s quick form. We will match you with one of our network of engineers. They will be able to give you an objective quote about how much your installation or replacement will cost.

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How Much Do Windows Cost? Replacement and Installation UK

How to Get the Best Window Quotes Online

1. Apply Online

Kickstart your journey to energy-efficient windows by filling out a brief form on the Warmable website. This form collects essential information about your project and location, helping us understand your requirements.

2. Receive a Call:

After submitting the form, you'll swiftly receive a call from our dedicated team to schedule a visit from trusted window installers in your local area. They will offer you free quotes and will provide a comprehensive overview of the costs and the scope of your window replacement project.

3. Engineer Quote:

After a thorough assessment of your home and needs, you'll receive a free quote from an accredited window specialist.

4. Installation:

Armed with multiple quotes, you have the opportunity to make an informed decision. Compare the offers from different installers objectively, considering your preferences and budget. Select the installer that best aligns with your vision for improved home energy efficiency.

Factors Affecting Window Costs


Window Size, Style, and Material

The cost of window replacement primarily depends on the size, style, and material of the windows. Different materials have varying price points and characteristics:

uPVC Windows Costs

uPVC (unplasticized polyvinyl chloride) frames are generally the most cost-effective option. They are known for their thermal efficiency, low maintenance, and durability. The price of uPVC windows varies based on size:

  • 600 x 900mm: £250-£400
  • 900 x 1200mm: £400-£600
  • 1200 x 1200mm: £650-£900

Aluminum Windows Costs

Aluminum frames are more expensive than uPVC but offer increased durability and a sleek appearance. They are also more thermally efficient with modern thermal break technology:

  • 600 x 900mm: £550-£700
  • 900 x 1200mm: £650-£800
  • 1200 x 1200mm: £750-£1,000

Timber Windows Costs

Timber frames are the most costly option, known for their classic and elegant finish. They add significant value to your home, especially for period properties:

  • 600 x 900mm: £850-£1,000
  • 900 x 1200mm: £1,200-£1,400
  • 1200 x 1200mm: £1,350-£1,500

The choice of window style can also influence the cost. Different window styles come with varying price tags, and here are some popular styles and their average costs:

Casement Windows Costs

These versatile windows can be fixed or open in various ways. The cost depends on the size and number of openers:

  • 600 x 900mm (Fixed): £150-£200
  • 900 x 1200mm (1 Opener): £250-£400
  • 1200 x 1200mm (French): £450-£500

Sash Windows Costs

Commonly found in period homes, these windows have distinctive features and higher costs:

  • 600 x 900mm: £550-£650
  • 900 x 1200mm: £675-£825
  • 1200 x 1200mm: £850-£1,100

Tilt & Turn Windows Costs

These modern windows open inwards and offer flexibility. They are relatively affordable:

  • 600 x 900mm: £350-£500
  • 900 x 1200mm: £550-£750
  • 1200 x 1200mm: £800-£1,050

Bay Windows Costs

These windows protrude outward, creating a bay area. Bay window costs vary based on the number of sections and size:

  • 2400 x 1200 (3 section): £1,590-£1,725
  • 3000 x 1200 (4 section): £1,775-£1,875
  • 3600 x 1200 (5 section): £2,200-£2,500

Bow Windows Costs

Bow windows are rounded and allow more light into your home. They are generally more expensive than bay windows due to their curved design:

  • 2400 x 1200 (3 section): £1,800-£1,950
  • 3000 x 1200 (4 section): £1,975-£2,175
  • 3600 x 1200 (5 section): £2,400-£2,600

Installation Costs

Installation costs are a significant portion of the total window replacement expenses. On average, the installation cost for a single window is around £300. 

However, this cost may increase if you are replacing multiple windows or if your project involves complex installation scenarios, such as windows on upper floors, which may require scaffolding.

The Company You Choose

The choice of the window installation company can significantly impact the total cost. Prices can vary based on the company’s size and location relative to your home. It’s advisable to obtain quotes from multiple reputable companies to compare offers and select the one that provides the best value for your money.

Cost of Window Glazing 

Additional costs may arise from specialized glazing options, such as low-emissivity (low-E), self-cleaning, or toughened glass, which can enhance energy efficiency and security. Extra security features, such as advanced locking mechanisms, can also contribute to the overall cost.

Double Glazing vs. Secondary Glazing Cost

Double glazing is a highly effective option for improving energy efficiency and reducing noise in your home. While the average cost of double glazing per window ranges from £350 to £600, it offers significant long-term savings on energy bills. The Energy Saving Trust estimates that installing A+ rated double glazing in gas-heated homes can save up to £195 per year.

If double glazing is not a viable option due to budget constraints or because your property is protected, secondary glazing is an alternative. Secondary glazing involves adding a second pane of glass to existing single glazing, improving insulation and reducing noise. However, it is not as effective as double glazing in terms of thermal performance.

FAQ About Best Double Glazed Windows

How much does it cost to replace windows?

Which window frames are the cheapest?

Which window style is the cheapest?

How do I measure my windows for replacement?

What is the difference between double glazing and secondary glazing?

Can I save on window installation by working with local companies?

What is the energy-saving benefit of double glazing?

How do I ensure the quality of my windows?

Types of Window

Why Should I Use Warmable For Window Quotes?


At Warmable, we are passionate about helping British households and companies find the best new window prices. Whether you are looking for a new window that can save money or has a high efficiency rating, we compare hundreds of window types and can help find the right one for you.



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How to Get Window Quotes and Prices in the UK


Before making a decision on window installation or replacement, it is a good idea to conduct thorough research and obtain multiple quotes to ensure you are getting a competitive price. When comparing quotes, consider the following:

  • A full survey of your home
  • Window frames and external cill
  • Energy efficiency rating
  • Security features
  • Type of glass (standard, toughened, obscured)
  • Handles
  • All installation and labor costs
  • Trims, fixings, silicones, and sealants
  • Registration with industry bodies like FENSA or Certass
  • Removal and disposal of old windows

Reputable companies will provide accurate and comprehensive quotes and allow you time to consider your options without pressure tactics. Always check the company’s experience, customer reviews, and testimonials to ensure quality service.

To save time and effort, consider using a free quotes service like Warmable, which connects you with up to four trusted window installers in your area. This service ensures you receive competitive quotes from top-rated professionals without any obligation to accept them.


Where Can I Get Window Installation and Replacement Near Me 


Warmable can help you find window installation and replacement services in London, Birmingham, Manchester, Glasgow, Leeds, Liverpool, Newcastle, Sheffield, Bristol, Nottingham, Southampton, Leicester, Coventry, Hull, Bradford, Cardiff, Belfast, Stoke-on-Trent, Wolverhampton, Plymouth, Derby, Swansea, Southampton, Sunderland, Luton, Swindon, Warrington, Croydon, Bournemouth, Southend-on-Sea, Peterborough, Salford, Reading, Dudley, Northampton, Portsmouth, Preston, Walsall, and more.

Warmable Can Help Find You the Best Deals for Double Glazed Windows in Your Area


Selecting the right double glazed windows for your home is essential, and finding the best deals is equally important. At Warmable, we specialise in connecting homeowners with certified and trusted double glazed window fitters in your local area.

Our network of professionals ensures top-notch installations and quality service. We believe in transparent and fair pricing, and all quotes we provide are obligation-free. When you choose Warmable, you’re choosing a sustainable, cost-effective, and eco-friendly solution for your home.

Contact us today to explore your double glazed window options and embark on a journey toward energy-efficient and stylish living.

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