Confidential work does not disappear because an office moves to activity-based working. HR conversations, client calls involving personal data, legal reviews, and performance discussions still happen daily, and an open floor plate with no dedicated setting for them just pushes the conversation into a stairwell or an empty meeting room booked under a fake name.
Planning confidential settings properly at the design stage, rather than retrofitting a phone booth after complaints start, is the difference between an activity-based office that genuinely supports all work types and one that only supports the visible, collaborative kind.
The gap most activity-based offices miss
Activity-based working briefs correctly plan for focus work and collaboration, but confidential work is a third category with different requirements: acoustic isolation, visual privacy from screens, and sometimes a locked door for documents. Treating it as a subset of "focus room" undersizes it, because focus rooms are usually designed for silence, not for a two-person conversation that must not be overheard.
The settings a floor plate needs
| Setting | Typical use | Capacity |
|---|---|---|
| Acoustic phone booth | One-to-one confidential calls | 1 person |
| Small private room | HR or two-person legal review | 2 to 4 people |
| Document review room | Physical or screen-based confidential material | 2 to 6 people, lockable |
| Executive private office | Ongoing confidential access | 1 to 2 people |
Sizing confidential settings against headcount
There is no universal ratio, since the right number depends heavily on the client's business. A BFSI or legal client with frequent client-data conversations needs meaningfully more confidential capacity than a product engineering team. As a starting planning range for a typical professional-services floor, one acoustic booth per 20 to 25 desks and one small private room per 40 to 50 desks is a reasonable baseline to test against actual usage after occupancy, then adjust.
This sizing should be part of the same workplace strategy exercise that sets the desk ratio and meeting room mix, not bolted on separately once the layout is otherwise finished.
Acoustic and visual privacy, not just a closed door
A closed door alone does not make a room confidential if the walls are thin partition glass with no acoustic treatment, or if the room has a full-height glass front facing an open collaboration zone where screens are readable from outside. Confidential settings need genuine acoustic separation. Solid or acoustic-rated partitions, not just glazed dividers. And frosted or switchable privacy glass where a screen or document might be visible from the floor.
This is a detail that gets value-engineered out under budget pressure because it looks similar to a standard meeting room on a floor plan. It is worth flagging explicitly in the design brief so it survives cost review.
Confidential document handling in open plans
Activity-based working assumes people do not have a fixed desk to leave sensitive papers on overnight, which means the office needs secure, personal storage. Individual lockers assigned per employee, positioned near their usual neighbourhood, and a clean-desk policy that is actually enforceable because the storage exists to support it.
- Assign lockers at onboarding, not as an afterthought once someone complains about nowhere to store files.
- Locate document review rooms near print and scan points so physical confidential material does not travel across the open floor.
- Include shredding and secure disposal in the same zone, not centralised somewhere inconvenient that gets skipped.
HR, legal, and compliance conversations specifically
HR and legal conversations have an added requirement beyond acoustic privacy: they need to be bookable discreetly, without the booking system publicly showing "HR meeting" against someone's name on a shared calendar. A generic room name and a private booking category, visible only to HR and facilities admins, solves this without extra construction cost. It is a booking-system configuration decision worth raising during the same project that specifies the physical rooms.
Frequently asked questions
As a starting baseline, one acoustic booth per 20 to 25 desks for a typical professional-services floor, then adjust after occupancy based on actual usage. BFSI and legal clients usually need more.
Not if the walls are thin partition glass or the room has full glazing facing the open floor. Genuine confidentiality needs acoustic-rated partitions and privacy glass, not just a door that shuts.
Individual lockers assigned at onboarding, positioned near each team's neighbourhood, plus a document review room near print and scan points so material does not cross the open floor.
Yes, with a generic room name and a private booking category visible only to HR and facilities admins. This is a booking-system configuration decision, not a construction one.