Trade (e.g. electrician)
North London Box Sash

North London Box Sash

Southgate, London

Skills & expertise

  • Windows/Doors/Conservatories

Company info

Welcome to North London Box Sash

North London Box Sash is 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 supplying and fitting new double glazed box sash windows. The complete restoration company from start to finish, we supply 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 systems and thermal Low-E glass, will overcome the age old problem of cold draughts and heat loss associated with sliding sashes. This 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 twenty 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. 

 Services we provide:


  • Double glazed, box sash windows in various timbers. 
  • Retro fitted double glazed sashes, into existing box sash windows. 
  • Draught proof existing box sash windows. 
  • Timber repairs, hardwood sill replacements. 
  • Security enhancements. 

We provide free estimates/ surveys and will always give our honest opinion, on what your project requires to maximise benefits.

Please call us to book your free survey:



  • 0203 589 4163
  • 07775 444 759


Or visit our website at


  • Domestic Work
  • Free Estimates
  • Insurance Work Undertaken


Works in

London, Barnet,

Verification status

Fully Verified Trader

Company Type
Sole Trader
Terms & Conditions
Interviewed in 2018
Company Status
Insurance Details