Windows, Doors and Aluminium Systems Manufactured in Chelmsford

Manufactured in our Chelmsford factory to the highest standards, our energy-efficient trade frames are made to measure, ensuring reliable quality, fast lead times, and exceptional performance.

We Supply Slimline, Ultra Performance, Aluminium Bi-fold Doors

Designed with slim sightlines and premium aluminium profiles, our bi-fold doors maximise natural light while delivering outstanding durability, security, and energy efficiency.

For Builders & developers

For home owners

For Architects & Projects

For Installers

Welcome to Abacus Windows, Chelmsford

As a family-run business based in Chelmsford, Abacus Windows has been manufacturing and installing premium PVCu windows, doors and conservatories since 1996, serving homeowners, local installers and commercial contractors with quality craftsmanship and reliable service.
✓ Family-Run Business Since 1996
✓ Made-To-Measure PVCu Solutions
✓ Professional Manufacturing & Installation

Creating beautiful, energy-efficient homes across Chelmsford and Essex.

Phone

01245 349 797

Location

Chelmsford, Essex

Our Services

Aluminium Bi Fold Doors

Superior, slimline, aluminium, bi folding doors made to measure and available in a wide range of powder coated finishes and free quotes available.

Replacement Windows

Whether you’re a trade customer or a home-owners, we fabricate all our energy efficient windows onsite, on time and on budget. Get a quote today.

Quality Doors

From sliding patios to composite doors, we can fabricate a wide range of doors to suit your requirements. Get a door quote today or read more.

Conservatories

Create extra space with a new conservatory built to your exact specification, we can deliver on quality, service and finish. Get a conservatory quote today.

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Our Services

Energy Efficient Windows

Offering a sculptured or chamfered edges and available in a variety of colours and foils, our superior windows are energy efficient and offer the best acoustic performance on the market.

Solid Composite Doors

Ultra-performance composite doors, offering style and security and available in a selection of vibrant colours and designs. Our doors are made to measure and installed to perfection.

Create Extra Space

Tailored UPVC conservatories available in many different shapes and sizes. Offering superior energy efficiency complimented by double glazed windows and a variety of doors styles.

Energy Efficient Windows

Offering a sculptured or chamfered edges and available in a variety of colours and foils, our superior windows are energy efficient and offer the best acoustic performance on the market.

Solid Composite Doors

Ultra-performance composite doors, offering style and security and available in a selection of vibrant colours and designs. Our doors are made to measure and installed to perfection.

Create Extra Space

Tailored UPVC conservatories available in many different shapes and sizes. Offering superior energy efficiency complimented by double glazed windows and a variety of doors styles.

Upvc Window systems

Aluminium window systems

Gutters soffit and facias

Bi fold doors

Sliding doors

Entrance doors

Conservatories

Rooflights and lanterns

Commercial properties

Manufacturing Quality Windows & Doors Since 1996

With over 30 years of industry experience, Abacus Windows has built a reputation for manufacturing and installing premium-quality PVCu and aluminium windows, doors, bi-fold doors, patios, and conservatories. Every product is made to measure in our Chelmsford factory, ensuring exceptional craftsmanship, energy efficiency, security, and long-lasting performance. Whether you’re a trade customer, homeowner, or commercial contractor, our dedicated team delivers reliable service, expert advice, and installations you can trust from start to finish.

Expert Installation

Service

Dedicated Customer

Support

CONTACT US NOW

01245 349 797

"Trusted Craftsmanship. Local Manufacturing. Personal Service."

Manufacturing and installing premium PVCu windows, doors and conservatories for homeowners, local installers and commercial contractors across Chelmsford and Essex.

Family-run and proudly serving the local community since 1996 with a commitment to quality, reliability and customer satisfaction.

1996 EST.

MANUFACTURED LOCALLY IN CHELMSFORD

“Every product is made to measure and manufactured with care, ensuring exceptional quality and lasting performance for your home.”

Customer Reviews

Can’t decide if we are the right company for you? See reviews which will help you make a well informed choice. Or maybe you would like to leave us a review?

Excellent Service, From Start to Finish

From design to installation, the entire experience was outstanding. The team was patient with every design change and always happy to help. Installation was handled professionally, even when an unexpected structural issue arose. The finished windows look beautiful, require no maintenance, and have received countless compliments. Highly recommended.

Sue Maine

Chelmsford

14/11/20

Kitchen Door & Window Turned Into French Doors

Could not fault this family-run business from start to finish. The team provided excellent service with no hard sales approach, making the whole process stress-free. Pricing was competitive, workmanship was outstanding, and Gareth ensured everything ran smoothly. I wouldn’t hesitate to recommend them or use them again.

Kerry Williams

Maldon

20/06/20

A Trusted Partner for 200+ Windows

Working alongside Gareth and the team has always been a pleasure. They assisted with the installation of hundreds of windows while maintaining exceptional quality and professionalism. No project is too big or small, and Gareth always provides honest advice and practical solutions. They’re my first choice for windows and doors.

Danielle

Braintree

08/06/20

Friendly Family Business

A friendly, family-run business with no pressure sales or pushy tactics. The team made the entire process easy and enjoyable, and even welcomed us to see the windows being manufactured. Professional service, quality craftsmanship, and honest advice made this a fantastic experience from beginning to end.

Ellie Cooper

Chelmsford

21/01/20

Get in Touch

Planning a new window, door, or conservatory? Contact our friendly team today for expert advice and a free, no-obligation quote. We’re here to help with every step of your project.

Phone

01245 349797

Email

orders@abacuswindows.co.uk

Address

Abacus House, 29 Robjohns Road, Widford Industrial Estate, Chelmsford, Essex, CM1 3AG

Want to know about Us

Have questions about our windows, doors or conservatories? We’ve answered some of the most common queries to help you better understand our products, manufacturing process and installation services.

How long have Abacus Windows been in business?

We are a family-run business based in Chelmsford and have been manufacturing and installing windows, doors and conservatories since 1996.

Trusted by Homeowners for Years?

Yes, all of our PVCu windows, doors and conservatories are manufactured at our Chelmsford facility to ensure consistent quality and craftsmanship.

Built on Trust. Backed by Experience?

Absolutely. Every installation is tailored to your property’s requirements, ensuring a perfect fit and finish.

Can I visit your factory?

Yes, customers are welcome to visit our manufacturing facility and see their products being made for complete peace of mind.

Do you provide installation services?

Yes, our experienced team provides professional installation services for all of our products.

Which areas do you cover?

We primarily serve Chelmsford and the surrounding areas across Essex.