About N.K. Special Windows
A London glazing practice rooted in proportion
Founded in London, we design, fabricate and install bespoke glazing for homes and commercial projects across Greater London and nationwide UK work.
Our approach
Heritage proportions, contemporary performance
Every opening has its own proportions, use and setting, so we start by understanding the building before we measure. Our methodology balances the character of traditional frames with the thermal efficiency expected of modern glazing, and each unit is fabricated to tolerances that allow it to sit cleanly within the existing structure.
Working closely with architects, builders and property owners, we take projects from first survey through to installation and aftercare. Our regional capability spans residential renovations, extensions and commercial façades, with the same attention to detail on every job.
Standards and compliance
Full FENSA registration
We are fully FENSA registered, confirming that our installations comply with UK building regulations. Each project is handled with the accountability expected of a specialist practice, from planning through to building control sign-off.
Our work is backed by clear guarantees and warranty support, so you know who to contact long after installation is complete.