North London Box Sash Reviews 

We have used North London Box Sash twice now and couldn’t recommend them enough. Mark was very professional and user friendly. He gave good honest advice, compared to other supplier’s and fitters that we consulted. All work was carried out to a very high standard, was clean and tidy, and completed in a respectful way to the rest of the house. All in all, they’ve replaced a total of 17 sash and casement windows, and installed shutters. We will be using them again to replace our rear windows very soon. Couldn’t recommend North London Box Sash enough.

A very professional job from start to finish.
Mark came round on different occasions to measure up and provide quotes.
The windows were made sooner than I was told and the team who fitted them were very professional, even finishing the job sooner than I was quoted. They were very polite and industrious and cleaned up well after themselves at each stage.
I would have no hesitation in recommending North London Box Sash and I now have a much warmer house with hopefully lower heating bills!

Expert advice during the planning phase. Clear quote with clearly written T&Cs. Very good communication throughout. Fitters were careful to protect the interior of my house during fitting of new windows. Punctual and polite fitters. Excellent windows installed with a smooth action. Room temperature is so much warmer and room is quieter.
I couldn't fault the service.

One of my windows was damaged, probably by a rogue pebble. The guys who replaced it were fast and courteous. It took some time for the manufactured window to arrive, but overall I think that North London Box Sash are excellent.

Great service. Mark and his team were professional, efficient and friendly. I love my new windows.

North London Box Sash replaced all our casement windows and French doors. The service from start to finish was outstanding. Mark was really responsive and took the time to understand exactly what we wanted, making sure no detail was overlooked ahead of placing the order. Once the order was placed we received frequent updates regarding the timing of delivery. The team of installers were very professional and tidy and clearly took pride in their work. A highly recommended company who I would definitely use again.

Quick efficient and no mess

We had various quotes for sash windows and they were all fairly similar. We chose North London Box Sash and are very happy that we did.
The team were very professional. There were no issues. Work was carried out swiftly and without a hitch.
The window fitting team were great.
The windows are perfect.
All in all it was a smooth experience from first consultation to end of job.
We would highly recommend.

We had 3 uPVC back windows and our uPVC back door replaced with wooden casement. The doors/windows themselves are very high quality with a 'solid' feel and the workmanship was top notch. They are very personable and professional (both in the office as well as on site). They worked with us on price and were quick to help when we wanted something adjusted. We will definitely use again in the future and we always recommend to friends/neighbours.

Communications very prompt, responsive to queries and gave advice when needed. Installation quick, tidy and did a very professional job. Double glazed sash windows to bay at front of the house, Less road noise, warmer and look great.

Really happy with the windows, had two sash windows installed and everything was completed on time and to budget, and they look fantastic! Highly recommend and will use again

I recently had North London Box Sash replace my windows, and I am thrilled with the results! They provided top-notch customer service, high-quality windows, a skilled installation team, outstanding craftsmanship, and completed the project on time. My new windows look amazing! I highly recommend them for a hassle-free and impressive window upgrade!

I had two old metal windows replaced with wooden sashes by North London Box Sash. Although more expensive than some other window companies, it was worth it for the quality of the windows and finish provided for the additional masonry work needed for the change in window type. The installers were excellent and finished the remedial work and painting to a very good standard. I will definitely use them again.

Brilliant service all round
The team at North London Box Sash were communicative, fairly priced, and very understanding of needing to work round other contractors on site as we had other building work done in parallel. The finished window is just gorgeous, we would definitely use them again!

Have used North London box sash to replace 5 windows and plan to use again next year for remaining. Work was done to good quality with no problems. Was good value in comparison to some other services

All the windows in my conservation area house have been replaced by North London Box sash company. I am delighted with the quality of the windows and with the workmanship. Luke and his team were extremely professional and nothing was too much trouble. Highly recommended.

Mark and his excellent team at North London Box Sash not only provided the most competitive price for the Victorian terrace house but the build quality to quite strict requirements of the local authority conservation demands was superb. Very pleased and all communications were professional and pleasant. Great work!

The team were so polite and friendly, they listened to my opinion and valued what I had to say ! The kept my house clean and tidy with noise to a minim. The windows look perfect I am beyond pleased with their work . I’d definitely recommend their service to others .

Delighted with 5 wooden box sash windows fitted - quality, standards and workmanship to an excellent level, team were professional, polite, quick and very easy to deal with. More than happy to recommend
Claire