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What better way of lighting up your home is there than by adding lots of windows?

Natural light is not only a power-saving solution, but it’s also a way of ensuring that your home is eco-friendly. Here at GreenMark, we offer a variety of windows that will provide a higher level of safety, as well as reduce the noise coming from outside.


Bespoke windows are made to meet your expectations and bring your ideas to life. In London, we manufacture custom sash and casement windows in our workshop. Our professionals will help you decide what window will be the best for your home and what to look for. 


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So, if you are planning on building a home and are looking for the best windows, here at GreenMark we will help you choose.

Remember that one of the biggest advantages of bespoke joinery is that you can have exactly what you wish, and with us, you will receive the highest standard of windows which will also increase your property’s value.


Don`t hesitate to contact us to have some of the best custom windows in London.

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If you are from the UK, you know that sash windows are very popular. At GreenMark, we offer stylish, elegant sash windows that will stand out as some of the most important visual elements.


In our offer, you will find bespoke sliding sash windows that are supplied with traditional weights and pulleys or modern spiral balanced mechanisms. Our specialists will help you make the decision which sash window will be best for you.

Before anyone introduced sash windows, casement windows were the most common choice. A casement is a type of window that is hinged and opens and closes by swinging either in or out.


GreenMark provides a wide range of casement windows in many forms, like traditional single-glazed flush casements, to modern double and triple-glazed energy-saving casements. Additionally, we offer traditional designs on these windows, upheld using a slim frame and detailed mouldings.

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