Welcome to North London Box Sash

North London Box Sash are a company specialising in character box sash windows. We pride ourselves on the quality of our craftsmanship and the years of experience we have in the repair, draught proofing, restoration, and replacement of box sash windows in North London and the surrounding areas.

We provide a timeless elegant and sophisticated finish to all our sash windows bottom of form using traditional methods and craftsmanship. The North London Box Sash joinery team create bespoke vertical sliding sash windows in order to match the original design and retain the period characteristics of your home. Our approved draught proofing system which overcomes the age old problem of cold draughts associated with sliding sashes can be installed to maximize heat retention and give you peace of mind your home will be warmer in harsh winter conditions.

We believe that character windows are a very important feature in any house and that they must be totally in keeping with the architectural style of the building to ensure that they enhance both the look and the value of your home. Our knowledge of over fifteen years working with Victorian and Edwardian box sash windows gives us supreme confidence you will be satisfied with our outstanding workmanship and the materials that we use. You can see samples of our windows on the Window Gallery page and on the News/Projects page which include a selection of our recent sash window installations accross North London.

Our Promise

We give free advice and estimates to everyone by a written quotation sent either by post or email. We usually inform our clients the next day by telephone with a job price and always keep to our start dates. We know how special your home is to you, therefore our skilled joiners are extremely careful as they work. We always try to keep dust to a minimum and always leave our work area spotless once we have finished, taking our refuse with us.

Once we have agreed a price it is final. On most occasions we only ask for a small deposit, so if you’re not satisfied with our workmanship or the materials that we have used, you simply don’t pay.