About Us

Get in touch with us today

We have the knowledge and experience to provide a comprehensive double glazing service.

We are an honest customer service based company as opposed to sales-driven. Our promise to you is that we will not pressurise you to commit to an order on the same day that we call. We understand that you need time to consider your requirements before coming to a decision.

Why Choose Group JML

Trustworthy & Reliable

Free Estimates

Work Insured & Guaranteed

Friendly & Helpful Service

100% Customer Satisfaction Guaranteed

Meet the team


Managing Director

With over 10 years experience in the business working with multiple companies Our Managing Director Jack Low started Group JML Windows & Doors in 2020 to give customers of Sussex the best customer service experience possible & has solid foundations in quality and craftsmanship.


Office Manager

Steph really is the brains behind the business and does a lot of work behind the scenes, from accounts to payroll and everything in between.

Steph plays a vital role in keeping Group JML on track. Steph is very organised and is always one step ahead with all administrative duties.


Senior Installer

Robbie has been with us from the start and oversees every installation. He enjoys a challenge and doesn’t let anything get in the way of achieving a perfect finish. 


Marketing & Media

Rebecca is responsible for all aspects of marketing and manages our social media accounts, online customer queries and carries out market research. With Rebecca’s hard work, we are able to ensure that we are providing the best customer service and products available.


Junior Installer

Jensen helps with all aspects of installations as well as keeping projects clean and tidy. Jensen is hoping to become an installer in the future and we appreciate all of his hard work.

Customer Testimonials

Select from one of the options.

Jack very kindly replaced the cat flap in our uPVC door. Done within 24 hours of initial contact. Would definitely use his services again when we look to replace the conservatory. Very highly recommended and a very nice guy

Mrs Bush - East Grinstead

Thank you Jack for your fast and efficient work. 

New patio doors fitted, quick and friendly. Highly recommended!!

Mr & Mrs Bleach - Crawley Down

Very professional service with excellent results. We’re very happy with the finished product! Jack is super friendly and had great communication throughout. Would highly recommend!!

Miss Forster - Brighton

Delighted with our new conservatory. Attention to detail and workmanship excellent. Thank you Jack.

Mr & Mrs Stevenson - Crawley Down

Thanks Jack and team for all your work replacing two of our old windows. Very friendly and efficient service. Will definitely use again and recommend 

Mr Mills - Burgess Hill

Jack was amazing, he came and measured my broken window and shortly after had the job done. Very professional and friendly. I would highly recommend, Thank you for a great job

Mr & Mrs White - Horsham


Group JML works one-on-one with Architects to create door and window designs tailored to meet your project’s specifications. Any size, any design, any challenge means that the team is constantly striving to be innovative in both engineering and styling. You’ll find that working with our internal CAD department and dedicated Project Manager saves you time, and provides you with the professional solutions you require.


We pride ourself on a longstanding relationship with multiple Builders in Sussex & Surrounding areas Our products have offered Builders unmatched quality and beauty; ensuring your project stands apart from the competition. Working with Group JML to create your order is made easy. Standard lead times of 3-6 weeks also ensure your project stays on schedule.