East London, South London, North London & Essex.

Sealed Tight, Fitted Right™ · Insulation Tape on Brick-to-Brick Installs

We serve all these areas.

We also cover Romford and Newham, and our East London and Essex double glazing page covers the wider area.

We provide value for money through Double-Glazing Solutions.

Established in 1999, Southeast Windows Ltd. offers high-quality double-glazing home improvement installations across East London, Essex, South London, and North London. We provide:

Energy-rated UPVC replacement windows.
uPVC Single and Double French Doors
Vertical Sliders. Sash windows, Box sash.
Tilt-and-Turn windows.
Bi-Fold doors.
Conservatories many styles
Inline Patio Doors
Extensions
Porch

Southeast Windows Ltd is dedicated to providing exceptional customer service, which is the foundation of every project we undertake. Our unwavering commitment to using high-quality products and deploying skilled installation teams has resulted in zero callbacks for service engineers, with the only exceptions being adjustments needed when a door settles after installation. This commitment ensures a seamless and satisfying experience for our valued customers. We take pride in ensuring that all our products comply with current building regulations, offering you the highest level of security and peace of mind. We offer security and energy-rated products to give you peace of mind with your investment. Furthermore, our products are energy-rated, and all uPVC casement windows are equipped with BFRC licence numbers as evidence of compliance when Southeast Windows registers its work with FENSA.

New Technology

We fit our unique insulation tape as standard on all brick-to-brick installations. This tape seals the window perimeter and improves the installation’s acoustic and U-Value, ensuring it is 100% waterproof, no more draughts, and moves with seasonal changes.

Want to know More?

Call us today for your FREE, no-obligation quotation or fill out our Contact Form! For the most modern, energy-efficient replacement Windows, Doors and Conservatory with a 10-year Insurance Backed Guarantee for complete home Comfort & Designed to Keep You Warm, Safe, & Secure.

Alternatively, call your local number below to arrange an appointment.

East London: 📞 020 8472 4088 (head office)
South London: 📞0203 856 6667
North London: 📞 0203 856 6669
Epping: 📞01992 940 809
Chelmsford: 📞01245 208 058
Romford: 📞 01708 202 457
Great Dunmow: 📞 01371 704 771

mariya B

4 days ago

We got several quotes from other companies, some of which seemed ridiculously overpriced, but Roy was by far the most genuine and straightforward. His prices were far more affordable compared to the others, and we felt we could trust him from the start without worrying about being ripped off. He replaced several windows and our garden doors, and the whole job was done quickly and to a fantastic standard. He was always responsive, answered all our questions promptly, and accommodated the date we needed. We’re absolutely delighted with the result. It’s refreshing to find someone who takes pride in their work, charges a fair price, and delivers exactly what they promise. We would highly recommend Roy to anyone!

Toslima Ali

1 week ago

Roy and his team were amazing, we had an odd shape conservatory fitted. Initially we went to uk windows and composite doors (Jaswinder kumar) who started the job in December 21, 4 months later they disappeared with no conservatory to be seen and we lost out on a large sum of money, they were cowboy builders. Roy managed to order and fit within 3 weeks, very professional job, looks amazing. You can trust these people with your money and they stick to their word. Friendly team, trustworthy, highly recommend

Somorun Khatum

Amazing job, very professional, thank you to Roy and his team.

Ryan Starr

2 weeks ago

Roy just finished. 100% Recommend! Roy very responsive and nailed the finish. Quality and price are right! Defo use them!!

Callum

5 months ago

Professional and friendly service from Roy and team throughout when fitting replacement windows for first floor flat! Competitively priced too

David Luck

6 months ago

Brilliant job by Roy and Rob. Very professional standard. Front Door and side and Transom windows fitted to perfection 😇

Paul Cvecka

7 months ago

Lads have been more than amazing! Our house is wonky as matchbox, so this house was a real challenge! Guys sorted everything out, did absolutelly splendid job. So sorry you had to went through the headache with our old “cottage”. Southeast fitting team have been absolutelly professional, helpful and very knowledgeable. You have been absolutelly amazing! Thank you! If I ever see you in pub around, round is on me! You have been amazing!

Brian Porter

11 months ago

Arranged a visit/quote and Roy turned up on time and gave us a non-pushy estimate and details for us without his wider window knowledge. Gave us a very decent quote and went with them. Arranged the date & time and Roy kept us up to date with any developments by email. Arrived on the day on time, did a great job fitting two windows in the morning and left the place clean and tidy. You can't ask for more really. 5/5 Stars. Would recommend. 👍

huong Luc

2 years ago

The team was led by Peter - great comms, double glazing patio door to insulate the ground floor bedroom, replaces single glaze door. After installation there was a slight problem but it was resolved in good time. Thank you.

Laurence Radford

Roy and team did an excellent and professional job replacing 3 front windows, making the change unnoticeable from the outside. They were worked with challenges getting large frames into the upstairs room and were courteous throughout. Would recommend.

Kate Cleaver

Really happy I chose Southeast Windows to fit my UPVC back door. Roy was friendly, professional and helpful at every step of the process. I was very happy with the workmanship and it was done so efficiently and with so little mess. I definitely recommend for a first class service !

Derek Wong

I would like to express my heartfelt thanks to Southeast Windows for their exceptionally good service. From the moment I reached out to them, their team demonstrated professionalism and efficiency that truly impressed me. The installation process of double glazing was remarkably fast, allowing me to enjoy the warmth of the new windows brought sooner than expected. Moreover, I was particularly impressed with the cleanliness maintained throughout the whole installation project. The team took great care to ensure that my home remained tidy, leaving no mess behind. This attention to detail speaks volumes about their commitment to customer satisfaction. Besides, the quality of the windows is outstanding. The windows not only enhance the aesthetic appeal of my home but also provide excellent insulation. I am thrilled with the results and would highly recommend Southeast Windows to anyone in need of window services. Thank you Roy and your team once again for your hard work and dedication!

Marc Jones

Amazing company and service. High quality work at very good price. Very efficient with great communication throughout. Would 100% reccomend.

David Gridley

3 years ago

Excellent work from Roy and his team. He installed our windows quickly and with a minimum of dust etc. They also took away the old windows which was a great help.

Arnold Cabanus

4 years ago

We recently had all our old windows replaced and installed by Southeast Windows. Everything, from the survey to the installation day runned smoothly .We are delighted with the excellent window installations that they did and left our house clean and tidy after. This company is very trustworthy , professional and courteous. If you need an honest and efficient windows installation company, definitely Southeast Windows Ltd is highly recommended.

Leah Corney

We chose southeast windows to replace our old upvc windows from initial survey company were very informative explaining different options available fensa warranty fire regs etc quotation was very competitive detailing all widow specifications everything what we was getting including removal of all rubbish So glad We went with triple gazing option not that much extra guys arrived early every morning we’re courteous and professional at all times did a fantastic job of installing windows clean and tidy windows look fantastic house is so much warmer and noise reduction really please we choose this company would definitely use again Highly recommend

Steve Clare

Roy replaced all the windows at the front of my house three years ago. This time I got him to replace a couple of blown windows in my kitchen. As before, he was efficient, courteous and excellent value for money. Communication was also outstanding. Very happy with the job and strongly recommend Roy.

Hilary Armstrong

5 years ago

Roy and his team fitted new windows and French doors in our house earlier this year (we wanted to live with them for a while before reviewing!). We are really pleased with the quality of the windows and the service from Roy. He's a real gent to deal with and is punctual and professional. His quote wasn't actually the lowest but he was the only one to supply full details of materials, give fire safety and security advice, send a detailed quote etc. Thank you Roy

Megan Monaghan

I got quotes from a few companies however Peter was the only one who followed up to my questions on email so I decided to go with Southeast Windows. I am super glad I did, as Peter was professional and I am really happy with the work done in installing a new PVC backdoor and replacing glass in several windows. Peter was knowledgable, friendly and didn't take advantage of my lack of knowledge of window and door installation like some other builders have, being a first time home owner. I wouldn't hesitate to recommend Peter and Southeast Windows, I will for sure be using them again if I need. Thank you Peter!