Trade Windows, Doors and Building Products Supplier in Worthing & West Sussex

Here at MLI, we supply a wide range of building products and double glazing solutions. From windows, doors and lantern roofs to soffits and fascia boards - we have everything you need to complete any home improvement project.
Get in touch Composite Door Designer

Market-leading products

We stock quality products, hand-picked from market leading manufacturers of windows, doors, conservatories and accessories.

Quick turnaround

Whether collecting in-store or delivering to site, we're able to fulfil orders quicker than any of our competitors.


We pride ourselves on our first-class customer service, ensuring tradespeople are able to offer first-class services in turn.

Why Choose MLI?

Our staff specialise in delivering great services to busy tradespeople. Our massive range of products are expertly specified, ensuring our clients are able to deliver the perfect project.
  • A range of products and finishes for complete versatility
  • Expert staff delivering exceptional customer service
  • Innovative technology for the ideal handover

Find our showroom   Book an appointment

Our Products

We take great pride in our commitment to excellence. We are committed to supplying the best windows, doors and conservatories with care that's why you can trust us for your project needs. Our team of experts take pride in manufacturing with care using only high-quality materials and newest technology. We work hard to provide our customers with quality products and services from start-to-finish. From using only high quality materials in manufacturing, such as aluminium or uPVC frames for windows and doors, to providing a free skip use, there is no better company than ours if you're looking for top notch service at an affordable price point. If this sounds good to you - contact us today!


We offer a wide range of windows with a selection of different styles available. All windows offer superior security and improved energy efficiency, while giving your home a slick, stylish new look that will stand the test of time with an extensive manufacturer’s warranty.


Our range of classic effect composite doors offer a secure but welcoming entrance to your home, while our range of uPVC doors blend perfectly with the style of your new windows. Bi-fold and French doors can be used to open up your living space to let the outside in, without compromising on security.


We offer a wide variety of conservatory styles to choose from and our team is dedicated to helping you find the perfect fit for your needs and answer any questions you may have during the selection process.

Free skip use when replacing old for new

Our Brands

Latest News

Stay up to date
patio sliding doors

Why choose patio doors?

There is no question that patio doors can add a touch of elegance and sophistication to any property. But before you invest in this type of door, it’s important to understand the benefits that they offer. In this blog post, we will explore some of the top reasons why you should consider installing patio doors. […]

Read more
gable-end conservatory

A complete guide to our 5 types of conservatories

Conservatories have been popular for years due to their many benefits. Here at MLI Building Plastics, we offer five different types of conservatories, each with its own unique benefits. In this blog post, we’ll provide a complete guide to our five types, so you can decide which one is right for your project. Lean-to Conservatories […]

Read more

Contact Us

    MLI Building Products

    Our Opening Times

    8am to 5pm Monday - Friday