Switching to flex office without breaking the team: method, ratios, budget and timelines. The Kytom decision guide for facilities, HR and management teams.
"We want to switch to flex, but without breaking the team"
Maintaining 1 assigned workstation per employee represents 8 to 12 sqm of unused space at 450 EUR/sqm/year in rental charges in office zones. For 200 employees with 50% average attendance, the annual extra cost exceeds 360,000 EUR. This drift goes unnoticed because it is spread across several separate budget lines.
A poorly prepared switch triggers 35% more complaints according to <a href="https://www.anact.fr/ressources" rel="noopener" target="_blank">ANACT</a>, particularly regarding noise, loss of bearings and confidentiality. HR absorbs the burden of individual trade-offs. Turnover among senior profiles rises by 4 to 7 points in the 18 months following an unconsulted relocation.
Regulations impose a maximum density and precise acoustic conditions on workspaces. An undersized flex setup exposes the company to a works council report and unfavourable internal media coverage. Musculoskeletal disorders account for 28% of leaves on unassigned workstations poorly equipped with adjustable furniture, a signal to factor into any flex office project.
Kytom frames each flex transition on a real occupancy measurement, never on a theoretical average. Our teams install sensors for 4 to 6 weeks to calibrate the workstation/employee ratio, generally between 0.6 and 0.75 depending on the roles. The scope includes acoustics, ergonomics (Vitra furniture or equivalent adjustable models), zoning (focus, collaborative, informal) and usage rules co-built with a panel of 15 to 20 ambassadors. Present in 11 agencies across France and Spain, we have supported more than 1200 clients since 2006, including 180 flex switches over an average floor area of 850 sqm. The facilities team keeps control of the budget, HR of buy-in, the manager of the employer promise.
Occupancy measurement via sensors over 4 to 6 weeks, interviews with 20 to 30 representative employees, acoustic and lighting audit. Deliverable: a quantified report on the real attendance rate, mapping of uses, a target workstation/employee ratio justified and validated by management.
Workshop with management, facilities and HR to settle the ratio, the scope of eligible teams, the target budget (800 to 1500 EUR/sqm) and the usage rules. Deliverable: a signed framing note, a 12-week schedule, a flex charter co-written with the designated internal ambassadors.
Detailed 2D and 3D plans, calibrated focus/collaborative/informal zoning, selection of adjustable furniture (Herman Miller, Vitra references), acoustic treatment compliant with the requirements applicable to workspaces. Deliverable: a complete project file, firm pricing, a works schedule, relocation scenarios tested with pilot teams.
Works carried out in 6 to 8 weeks, change support (3 workshops per team), training of managers in the new hybrid rituals. Deliverable: operational spaces, a usage-rules facilitation kit, satisfaction measurement at D+30 and D+90 to fine-tune the setup.
"We feared a backlash from the senior staff. The occupancy measurement defused the debate, the figures spoke for themselves. Six months later, 82% of the teams recommend the setup."
Between 0.6 and 0.75 depending on the roles. Sales functions tolerate 0.5, technical teams 0.8. The ratio is calibrated only after 4 to 6 weeks of real occupancy measurement, never on a projected attendance declaration.
Set up a panel of 15 to 20 representative ambassadors from the diagnosis stage. Share the measured occupancy figures. Guarantee personal lockers, adjustable ergonomic furniture and enough focus zones. Buy-in reaches 80% when these 3 conditions are met.
Between 400,000 and 1,500,000 EUR excl. VAT depending on the fit-out level. The acoustic item accounts for 12 to 18% of the total, furniture 30 to 40%, partitions and zoning 20 to 25%. Excluding any major structural works.
Yes, provided you comply with article R4214-22 (density, ventilation) and the acoustic requirements applicable to workspaces. The works council must be consulted beforehand. A formalised technical file secures the approach and anticipates any reports to the labour inspectorate.
12 weeks on average from diagnosis to delivery, including 4 to 6 weeks of occupancy measurement, 2 weeks of design, 6 to 8 weeks of works. Change support continues for 3 months after the move to stabilise the uses.
Three indicators: floor area saved (20 to 30% typical), annualised rent gain, employee satisfaction measured at D+30 and D+90. Payback lies between 24 and 36 months on a well-calibrated project. Beyond that, the productivity gain adds up but remains harder to isolate.