Workplace Planning: From Headcount to a Floor Plate That Works

The four questions that decide a layout

Everything else follows from these:

1. How many desks does this headcount actually need?
2. How many enclosed rooms, of what sizes?
3. How much of the plate is consumed before desks are placed?
4. What growth is the layout expected to absorb?

A brief that answers all four produces a layout that lasts. One that states only a headcount produces a layout that gets revised.

Desks are no longer one per person

Hybrid working broke the assumption that headcount equals desks, and replaced it with a ratio that is specific to each organisation.

The mistake to avoid is setting that ratio from average attendance. The layout has to work on the peak day. An office planned on averages is an office where people hunt for a desk on the busiest days, and the arrangement loses credibility quickly.

If you have access data, measure peak attendance across several weeks. If you do not, plan conservatively and design in the ability to add desks later — which is cheaper than the reverse.

The room mix matters more than the room count

Most organisations discover the same thing after occupation: too many large rooms, not enough small ones.

Large rooms feel significant at planning stage and get specified generously. In practice the scarce resources are two-to-four person rooms for quick discussions, and phone booths for calls that should not happen at a desk.

If booking data exists, use it. If not, err toward more small enclosed spaces and fewer large ones — and remember every enclosed room consumes area twice, once for the room and once for the circulation to reach it.

What consumes the plate before any desk

Consumer	Notes
Core and structure	Fixed, varies enormously between buildings
Primary circulation	Must be continuous and compliant
Secondary circulation	Reaching each enclosed room
Reception and waiting	Often larger than assumed
Pantry and cafeteria	Needs drainage and extract — position is constrained
Enclosed rooms	Area plus their access
Services zones	Risers, plant, and zones with no desks

This is why a seat count derived from total area is misleading, and why counting desks into services zones produces a headline number that collapses during coordination.

The only reliable method is a test layout on the actual plan, with the core and structure as drawn.

Daylight is a planning decision

The single most damaging default is lining the facade with enclosed rooms.

Daylight stops at that line. The open floor behind runs on artificial light all day, which affects how the whole space feels and works against daylight-linked lighting control.

Two workable alternatives: place enclosed rooms toward the core, or glaze them so light passes through. Interior illumination practice is set out in IS 3646.

Plan for the floor to change

A layout that assumes permanence is a layout that will be demolished.

• Use demountable partitions where the room arrangement may change
• Consider a raised floor if desks will move often, so outlets move with them
• Keep a flexible zone that can absorb additional desks
• Avoid fixing services to a layout more tightly than necessary

The cost difference at fit-out is modest. The cost difference at the first reconfiguration is not.

Check compliance while it is still a drawing

Subdividing a floor changes escape arrangements, travel distances, occupancy assessment, detection and sprinkler layouts. Those are determined under NBC 2016, Part 4 and local rules by the fire consultant and the authority having jurisdiction, with services provisions in NBC 2016, Part 8.

Checking at drawing stage costs an hour. Checking after the ceiling is closed costs weeks.

Standards referenced

Fire and life safety provisions, including occupancy and escape, in NBC 2016, Part 4; building services in NBC 2016, Part 8; interior illumination practice in IS 3646. Occupancy assessment, escape arrangements and services capacity for a specific floor must be established by the project's consultants and the authority having jurisdiction.