Modern home exterior with new windows and doors

Over 25 Years Of Experience

Providing Quality Windows, Doors, Porches, Conservatories & Rooflines

Across Leicestershire, Nottinghamshire, and Derbyshire.

Peace of Mind, Guaranteed

We stand behind our work with comprehensive guarantees that protect your investment and give you confidence in our service.

Full 10 year insurance backed guarantee

15 years un-interrupted local business

Family run business

Fully fitted open house where you can meet the team

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Our Pledge to You

Our promise is simple: to deliver exceptional quality and service, every time. We aim to exceed your expectations at every step, from our first conversation to the final installation. Our experienced team provides expert, friendly advice, whether you're seeking a traditional touch or a modern uplift for your home.

We take immense pride in our after-sales service, which has earned us an outstanding reputation for reliability, professionalism, and quality across Leicestershire and beyond. We're always looking to improve and welcome your feedback.

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Offer of the Month

A Legacy of Quality & Service Spanning 25 Years

C.I.S. is a local, family-run business with over 25 years of dedicated experience in the home improvement industry. We pride ourselves on exceptional customer service and a commitment to quality that lasts long after the job is done.

We utilise premium German uPVC profiles, renowned for their durability and performance for over 45 years. Our proven track record of innovative design, effective problem-solving, and meticulous attention to detail ensures we meet and exceed the expectations of every customer.

From small domestic updates to large-scale commercial projects, we handle every job with the same high standards and competitive pricing. Our goal is to transform your vision into reality, seamlessly and professionally.

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Our Story

A Local Legacy, A Family Commitment

Long before CIS Windows became a trusted name across Leicestershire, our journey began with a single glazier, a van, and a simple promise: to provide honest work and quality repairs to his neighbours. That dedication to craftsmanship and community is the foundation we're still built on today.

Driven by a passion to carry on this legacy, the next generation stepped in, transforming a one-man-band into the family-run business you see today. We've grown, but our core values haven't changed.

Every window we fit and every door we hang is a reflection of our family's commitment to you. We're not just improving houses; we're helping build homes. That's the CIS promise.

Founder of CIS Windows working on an installation

Our Services

Tailored Solutions For Your Home

We offer a wide range of bespoke home improvement services. While we provide a faster, more immediate response for projects in Coalville and the surrounding area, we also proudly serve customers across Leicestershire, Nottinghamshire, and Derbyshire.