Property Maintenance in the North East UK

uPVC Casement Windows

CSM North East will beat any quote for casement window installation by 5%.
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Finance Options Available On All Fully Fitted uPVC Windows

Get Low Rates On All Home Windows
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Range of uPVC Window Options

Whether you’re looking for uPVC windows in bay, casement, sash or Velux windows we have something that will suit your home. View the entire range.

Low Maintenance uPVC Windows

The REHAU window systems contain a unique compound that guarantees a smooth and high gloss finish, retaining their appearance for years.

Improved Security and Efficiency

All REHAU window systems comply with all the standard governing enhanced security accreditations, achieving the Secured by Design certification.

We’ll Beat Quotes by 5%

CSM will beat all like-for-like quotes by 5%. We’re one of the highest rated property maintenance companies in the north east and promise to deliver outstanding excellence.

View the Entire REHAU Range
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Casement Window Installation in Darlington

If you live in the North East of England, speak to us today for a free, no obligation quote for replacement windows. Alternatively, if you need help choosing from the series of uPVC bay windows available, we can also guide you.

CSM Specialise in the Supply and Installation of Casement Style Windows Throughout the North East​

Whatever your preference, whether it’s sash, casement or bay windows, we have double-glazing window options for you. If you’re not sure what you need, one of our helpful surveyors can view your property and provide honest advice. Give your home the attention it deserves with fully fitted uPVC windows.


Our replacement casement uPVC windows are manufactured from the REHAU profile – containing a unique compound that guarantees a smooth, high gloss finish. This means that your new uPVC casement windows retain their pristine appearance for years to come. It also means that they will never warp or rot and, of course, will never need painting.


Choosing the right replacement uPVC casement windows can help make your home more energy efficient and reduce heating costs.  All REHAU window systems can achieve an ‘A’ rating (A rated windows) – the highest energy rating and when installed with the appropriate glazing unit. Whether you are after double glazing or triple glazing for improved noise reduction, we’ll help you choose the right solution for your home.

Get a Cost For Replacement Casement Windows​

As all windows are acquired at trade prices and are made to measure which reduces wastage to the absolute minimum, we can provide the most competitive pricing.


We take huge pride in the quality of our workmanship and customer service that we provide. Our experienced uPVC sash window installers will take great care protecting your home at every stage of the project, removing all rubbish from the site on completion and carrying out a final walk-around with you at the end of the job to ensure your complete satisfaction.


Get a price for casement uPVC window fitting for your home right now with our online cost estimator.

Wood Style Frames

White Window Frames

Black Window Frames

Security for you and your home is paramount, so we only install window systems that are made from the highest quality uPVC and have been designed to provide rigidity and strength. All REHAU window systems can comply with PAS 24, the standard governing enhanced security enabling them to achieve Secured by Design (SBD) certification.

Highly rated uPVC casement window fitters

Workmen were nice and friendly, knew about what they were doing, really good at tidying up, overall couldn’t fault.” - Had a conservatory roof removed and re-fitted with a guardian roof.

Verified Customer in Cramlington 15 June 2018

Areas We Cover

Newcastle upon Tyne
County Durham

Office Hours

Monday – Friday: 9.00am – 5pm
Saturday – 10.00am – 2pm
Sunday – closed

Friendly Advice, Window Replacement for Your Home or Complete Property Maintenance


In just a few days, your existing uPVC windows can be smoothly transformed into a superior REHAU profile uPVC casement windows without the need for any alterations to your existing structure, fixtures or fittings.



From planning through to completion, CSM provides you with a complete and professional uPVC window installation service. Our fully trained installation team provide unbeatable quality of workmanship and are 100% committed to the satisfaction of our customers.

Specialist uPVC Casement Window Fitters in Your Area

Recent Projects

Alnwick Northumberland White Georgian Sash Window Installation

Window Installation – Alnwick, Northumberland

Customer Testimonial Customer Testimonial: “Excellent job done. Would highly recommend.” Customer in Alnwick, Northumberland Project Details Location Location: Alnwick, Northumberland Installation Time Installation Time: 1

saltburn north yorkshire white window installation

Window Installation – Saltburn, North Yorkshire

Customer Testimonial Customer Testimonial: “Quick installation of an excellent product.” Customer in Saltburn, North Yorkshire Project Details Location Location: Saltburn, North Yorkshire Installation Time Installation

Our uPVC Windows are Supplied By Rehau

CSM North East Has Been Restoring Buildings and Homes to Peak Condition Since 1999


We get trade prices on all garage doors and pass the savings onto you.


We’ll Beat Quotes By 5%

Rated 9.7 from 343 Verified Reviews

Fully Accredited and Insured

Payment Plans With Finance Available

Complete Property Maintenance

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