Open plan offices solved one problem and created another. Removing walls let light and sightlines travel across the whole floor, but it also removed anywhere private to take a call, have a sensitive conversation, or just focus without interruption. Adding that privacy back with solid walls usually undoes the exact thing the open plan was trying to achieve.
Most floor plans put windows on the perimeter. If you build private offices along that same perimeter with solid walls, you've just blocked the natural light from ever reaching the interior of the floor, which is exactly the area that needed it most once those offices went up. This is the single most common mistake we see in open plan to private office conversions.
A glass wall around a private office maintains the sightline and light transfer that made the open plan work in the first place, while still giving the occupant a closed door and, with the right glazing, real acoustic separation. You get the privacy without sacrificing the reason the open plan existed.
Not every new private space needs the same treatment. Phone booths and quick-call rooms generally don't need acoustic glass, frameless or demountable glass without the upgrade is fine for short, low-sensitivity conversations. Offices and meeting rooms where focused work or confidential conversations happen regularly are worth the acoustic investment.
Open plan conversions are often a first step, not a final layout. If there's a real chance you'll add more private offices or adjust the configuration as your team grows, demountable systems let you build incrementally without committing to a permanent answer on day one.
Let's talk through your space, free consultation, no pressure.