Office Space per Employee: How Many Square Metres Does Your Team Need?
How much office space does each employee need in Spain? Learn the legal minimums, recommended square metres, hybrid working calculations and office options.
TL;DR
Spanish law establishes a minimum of 2 m² of free floor space and 10 m³ of unoccupied volume per employee, but this legal minimum is far below what a team needs to work comfortably. Royal Decree 486/1997 on workplaces establishes these minimum requirements, and the Spanish National Institute for Safety and Health at Work (INSST) clarifies that they are calculated for each room after deducting the space occupied by desks, cabinets and equipment. To determine actual space requirements, office space per employee must be calculated differently: workstations plus meeting rooms, break areas, reception, storage and circulation space. As indicative references, Spain's Technical Building Code uses 10 m² per person in office areas to calculate evacuation requirements, while the CBRE Office Trends study reported an average of 14.1 m² of usable space per workstation in 2024, with 0.74 workstations per employee.
In practice, a self-contained office floor typically requires between 8 and 14 square metres per employee, depending on the type of work and how the space is distributed. Hybrid working can reduce this figure if the office is sized according to peak attendance rather than the total workforce. In a business centre, the calculation changes: you only pay for the enclosed private office because reception, meeting rooms and break areas are shared facilities. That is why, in our experience, flexible private offices are cost-effective for teams of up to several dozen people, while conventional office floor rentals become suitable from approximately 400 m².
How much office space per employee is legally required in Spain?
The legal reference is Royal Decree 486/1997 of 14 April, establishing minimum health and safety requirements for workplaces. Annex I, in the section concerning workspaces, establishes three minimum dimensions for premises: a floor-to-ceiling height of 3 metres, which may be reduced to 2.5 metres in offices; 2 square metres of free floor space per employee; and 10 cubic metres of unoccupied volume per employee.
The word "free" must be interpreted carefully. It does not mean 2 m² of total office space per person, but rather 2 m² remaining after deducting the space occupied by furniture and equipment. Therefore, the total office area per employee required to comply with the regulations will always exceed two square metres. The same regulation also states that the distance between workstation elements must allow employees to work safely, healthily and comfortably. It establishes a minimum corridor width of 1 metre and a minimum width of 80 centimetres for external doors.
For computer-based work, Royal Decree 488/1997 on display screen equipment also applies. It does not specify a number of square metres per employee, but it requires workstations to provide sufficient space for changes of posture and desks to be large enough to accommodate screens, keyboards and documents comfortably. In other words, the legal minimum is a baseline, not a design objective. Bear in mind that regulations may be updated and that the specific workplace assessment is the responsibility of the company's occupational risk prevention service.
How do you calculate free floor space per employee step by step?
The Spanish National Institute for Safety and Health at Work (INSST) explains the method in its technical guidance on workplaces. The calculation is made for each room, not for each workstation: the floor area and volume occupied by desks, machinery, appliances and bulky equipment are deducted from the room's total area and volume. The employee's own chair is not deducted because it is occupied by the employee, but visitor chairs are. The remaining area and volume are divided by the number of employees and must exceed 2 m² and 10 m³ per person.
Consider an illustrative example involving a 40 m² room with a clear ceiling height of 2.60 metres, intended for six people. Six desks measuring 160 × 80 cm occupy 7.68 m²; two cabinets measuring 100 × 45 cm occupy 0.90 m²; and two visitor chairs occupy approximately 0.50 m². This leaves 30.92 m² of free floor space, equivalent to 5.15 m² per employee, comfortably exceeding the minimum area requirement. In terms of volume, the room has 104 m³; after deducting a simplified estimate of the volume occupied by desks, cabinets and chairs (approximately 8 m³), around 96 m³ remain, or 16 m³ per person, also above the minimum.
This example illustrates an important point: with ceilings measuring 2.5 or 2.6 metres, the volume requirement often becomes restrictive before the floor area requirement. In this room, the free floor area could theoretically accommodate 15 people, but the volume would only allow 9. Neither figure would be comfortable, because adding more desks would further reduce the available floor area and volume: the total office space per employee would fall from almost 7 m² to just over 4 m². To perform the calculation using your own measurements, the INSST provides a minimum free floor space per employee calculation tool.
What is the difference between the legal minimum and the recommended office space per employee?
The legal minimum answers the question: "How many people can occupy this space without breaching the regulations?" The question that matters to a company is different: how many square metres per employee are needed for the team to work effectively, hold meetings, welcome clients and store their belongings? There is a substantial difference between the two answers because the regulation focuses on the free space within the workroom and does not include meeting rooms, break areas, reception, toilets or general corridors.
A frequently cited technical reference is Spain's Technical Building Code. Its Basic Document on Fire Safety assigns an occupancy density of 10 m² per person to office floors or areas used for administrative purposes, calculated on usable floor area. Importantly, this figure is intended to determine evacuation routes and exits, not to recommend a comfortable working environment. Even so, it provides a useful indication of what a building project considers normal office occupancy.
From a market perspective, the CBRE Office Trends study, published in January 2024, reported an average usable floor area of 14.1 m² per workstation, with a ratio of 0.74 workstations per employee. Multiplying these figures gives approximately 10.4 square metres per employee, although this is a market average and individual companies may differ considerably depending on their activities.
| Reference | Figure | What it measures | Source |
|---|---|---|---|
| Minimum free floor area | 2 m² per employee | Space free of furniture and equipment within the room | Royal Decree 486/1997, Annex I |
| Minimum free volume | 10 m³ per employee | Unoccupied volume within the room | Royal Decree 486/1997, Annex I |
| Minimum office ceiling height | 2.5 m | Floor-to-ceiling height | Royal Decree 486/1997, Annex I |
| Occupancy density | 10 m² per person | Evacuation calculations based on usable floor area | Technical Building Code, DB SI, Table 2.1 |
| Market average | 14.1 m² of usable space per workstation | Total area distributed among workstations, with 0.74 workstations per employee | CBRE Office Trends (2024) |
| Practical range for a self-contained office floor | 8–14 m² per employee | Workstations plus support areas and circulation space | Indicative, based on our experience |
The legal minimum tells you how many people can occupy a space without breaching regulations. The office space per employee you actually need depends on how your team works, and is almost always three or four times greater.
What spaces should be included in addition to workstations?
The most common mistake when calculating office space per employee is multiplying the number of desks by the number of people and forgetting everything else. A functional office needs at least five types of space in addition to workstations: meeting areas, a kitchenette or break area, a reception or waiting area if you receive visitors, storage and archives, and circulation space connecting all these areas. Toilets must also be considered; in some buildings they are located inside the office, while in others they are shared facilities on the same floor.
Each area has its own requirements. Meeting rooms are sized according to capacity: a table for six people with chairs, a screen and enough room to move around typically occupies between 12 and 18 m². Phone booths for calls and video conferences are small, but become essential in open-plan spaces. Break areas need to grow with the workforce because most employees tend to use them at lunchtime. Storage requirements depend on the industry: an accounting firm handling paper files has very different needs from a software company.
Circulation space is the invisible cost that is most frequently underestimated. Corridors must be at least 1 metre wide under Royal Decree 486/1997, and sufficient space is needed around each desk to stand up, open drawers and walk behind colleagues without disturbing them. In an open-plan office, the shape of the floor, the position of structural columns and the number of façades providing natural light determine how much space is lost. That is why two offices with the same floor area can accommodate very different team sizes and produce significantly different square metres per employee.
How much space does each type of workstation require?
Not all professional roles require the same amount of space. An operational workstation in an open-plan office, with a desk, chair, drawer unit and its share of circulation space, is the most space-efficient arrangement. A workstation used for handling extensive documentation requires a larger desk and nearby storage. An individual office for management or confidential meetings occupies considerably more space because it includes a desk, visitor chairs and an enclosed room.
The following table summarises indicative ranges of square metres per employee in a self-contained office floor, including a proportional share of communal areas and circulation space. These are reference figures based on our experience with professional services teams, not regulatory requirements. The final figure depends on the furniture, the layout of the premises and the number of meeting rooms required.
| Work profile (indicative) | Workstation space | Square metres per employee including shared areas | Notes |
|---|---|---|---|
| Operational role in an open-plan office | Desk and drawer unit | 8–10 m² | Most efficient arrangement; requires phone booths |
| Technical role involving documentation or dual monitors | Large desk and nearby filing space | 10–12 m² | More storage per person |
| Client-facing role in the office | Workstation and waiting area | 11–13 m² | Reception and meeting rooms take up more space |
| Management or confidential work | Individual enclosed office | 14 m² or more | Private office with visitor chairs |
| Hybrid team with shared desks | Bookable workstation | 6–9 m² per employee | Calculated using the total workforce, not just those present |
The most interesting part of this table is the final row: when the entire team is not present at the same time, the square metres per employee decrease even if the space per workstation remains unchanged or increases. This explains why the market average area per workstation has increased while the number of workstations per employee has fallen.
How does hybrid working change office space requirements per employee?
With hybrid working, the key question is no longer how many people are employed, but how many are present on the busiest day. If you have 20 employees and attendance is concentrated between Tuesday and Thursday, providing 20 fixed desks means paying for empty workstations two days a week. Sizing the office according to average attendance is also a mistake because there would not be enough desks on peak days. The correct reference is normal peak occupancy, with a small safety margin.
In an illustrative example, a team of 20 people attending the office three days a week, with peak attendance of 15 employees, could operate with 15 or 16 workstations, a ratio close to the 0.74 reported in the CBRE study. If each workstation, including its share of common areas, occupies approximately 11 m², the office requirement falls from around 220 m² to approximately 170 m², and the space per employee decreases from 11 m² to around 8.5 m². These savings are only real if the office is reorganised to include shared desks, booking rules and lockers for employees without assigned workstations.
Hybrid working also shifts space away from desks towards meeting rooms: office days are increasingly dedicated to collaboration, so meeting rooms and phone booths may become insufficient before desks do. We explored this change in our article on how hybrid working is transforming office spaces and the equipment required in our guide to hybrid meetings and audiovisual equipment. The essential point is that, with hybrid working, office space per employee should be calculated according to actual attendance rather than the organisational chart.
How can you calculate the office space your team needs in five steps?
The method we propose to teams visiting our centres consists of five steps. First, count employees and identify their roles: how many operational workstations, how many positions requiring document storage and how many individual offices. Second, determine attendance: will everyone be present every day, or will you follow a hybrid model with a known peak? Third, define the support areas: how many simultaneous meetings take place, whether you receive clients and how much physical filing space you need. Fourth, add an allowance for circulation. Fifth, include room for growth over the next twelve to eighteen months.
Here is an indicative example for a team of eight people who work on-site and receive clients a couple of times a week. The areas are reference estimates intended to illustrate the method, not measurements from a specific office project:
| Space requirement (indicative example) | Self-contained office floor | Private office in a business centre |
|---|---|---|
| 8 workstations | 48 m² | 28–34 m² (enclosed private office) |
| Meeting room for 6 people | 15 m² | Shared facility, bookable by the hour |
| Kitchenette and break area | 8 m² | Shared facility |
| Reception and waiting area | 6 m² | Business centre reception |
| Filing and storage | 4 m² | Cabinets inside the private office |
| Circulation and space losses (≈ 15%) | 12 m² | Included in shared areas |
| Total area rented | ≈ 93 m² | ≈ 28–34 m² |
| Square metres per employee | ≈ 11.6 m² | ≈ 3.5–4.3 m² of private space |
The right-hand column does not mean that the team works in more cramped conditions: the desks are the same. The difference is that meeting rooms, break areas, reception and general corridors are shared and included in the monthly fee, rather than being rented exclusively even though they may only be used for a few hours each week. That is why comparing square metres per employee between a self-contained office floor and a business centre without making this distinction leads to misleading conclusions.
When is a private office more cost-effective than an entire office floor?
A private office is particularly cost-effective when the team is small or medium-sized and support areas would account for a substantial proportion of a self-contained office floor. With eight people, as shown in the previous example, almost half the space on the self-contained floor is not occupied by workstations. With three or four people, the proportion becomes even less favourable: a meeting room or kitchenette occupies almost the same amount of space for four people as it does for eight, yet the entire area must be rented, increasing the square metres per employee.
At our centres in Azca, Gran Vía and Velázquez, the private office is an enclosed space for exclusive use, while the remaining services are provided in shared areas. As a reference, at the time of writing this article, we have offices of 17 m² available for four or five workstations and one of 55 m² for fifteen workstations, equivalent to between 3.4 and 4.3 square metres of private space per employee. Private offices start at €1,350/month + VAT, depending on the location and number of workstations, with furniture, cleaning, utilities, internet and reception included in the fee.
Another advantage is that the size is not fixed permanently. If the team grows from five to nine people, it can move to a larger private office without renovation work or relocating to another building; if the team becomes smaller, the space can be adjusted accordingly. In a self-contained office floor, every change in workforce size requires reorganising the space or paying for unused square metres until the contract ends. The space per employee you pay for increases whenever someone leaves. When growth plans are uncertain, that flexibility can be just as valuable as the price per square metre.
Flexible or conventional office rental: which is best for your space requirements?
There comes a point when having your own office premises makes sense. The conventional office rentals we offer consist of entire office floors starting at approximately 400 m², with long-term contracts, monthly rent plus VAT and the freedom to arrange the space according to your requirements. Using an indicative reference of 10 square metres per employee, 400 m² can accommodate a team of around 40 people working on-site, or slightly more with a hybrid model.
Below that scale, flexible office rental is generally more efficient in terms of both space and cash flow: there are no renovation costs, furniture purchases or security deposits and bank guarantees equivalent to several months' rent, and you only pay for the private space. For a complete breakdown of monthly fees and what each option includes, our article on how much a flexible office costs in Madrid compares the total cost of occupancy.
| Situation | Most suitable option | Why |
|---|---|---|
| Remote team needing a business address and mail handling | Virtual office | No physical office space required: business address, mail and occasional meeting rooms |
| Freelancer or team of 1 to 3 people | Small private office or flexible workstation | Shared areas avoid the cost of renting private meeting rooms and break areas |
| Team of 4 to 30 people | Flexible private office | You only pay for private space and can expand |
| Stable team of around 40 people or more | Conventional office floor rental | The scale justifies dedicated premises and a long-term contract |
| Occasional client meetings | Meeting rooms by the hour | Variable expense instead of paying for permanent space |
For teams that do not need permanent workstations, a virtual office provides a company address and mail reception without renting physical office space. Plans range from €40 + VAT per month (Basic) to €90 + VAT (Business) and €150 + VAT (Premium). And if you only meet clients occasionally, meeting room rental by the hour turns that requirement into a variable expense rather than paying for fixed space throughout the month.
What mistakes are commonly made when calculating office space?
The first mistake is confusing the legal minimum with the space actually needed. Just because premises comply with the minimum of 2 m² of free floor area and 10 m³ per person does not mean they provide a good working environment; it simply means they meet those minimum requirements. Teams whose offices are designed close to the legal minimum often end up without enough meeting space, without quiet areas for concentration and with employee turnover problems that cost more than the square metres saved.
The second mistake is the opposite: sizing the office according to the organisational chart expected five years from now. Renting today the square metres needed for a workforce that does not yet exist means paying for a half-empty office for years. The third mistake is forgetting support areas and circulation space, as shown in the eight-person example. The fourth is applying the same space ratio to hybrid working as to full-time office attendance.
Other mistakes we frequently encounter include:
- Measuring gross floor area when the reference ratio relates to usable floor area, or vice versa.
- Failing to check the actual clear ceiling height, which affects compliance with the minimum volume of 10 m³ per employee.
- Ignoring structural columns, façades without natural light or irregular layouts that make parts of the office floor unusable.
- Planning just one meeting room for a team that holds several meetings simultaneously.
- Comparing the price per square metre of an empty office floor with the monthly fee of a serviced private office.
What else matters besides square metres?
Square metres per employee do not tell the whole story. Ceiling height matters both for volume and for the perception of space: regulations allow a minimum height of 2.5 metres in offices, but a floor with higher ceilings and good natural light feels more spacious even when the floor area is identical. Lighting has its own legal minimum requirements: Annex IV of Royal Decree 486/1997 requires 500 lux in areas where tasks involve high visual demands and states that workplaces should have natural lighting whenever possible.
Ventilation and noise also depend on occupancy density. The more people there are per square metre, the more fresh air is required and the harder it becomes to concentrate in an open-plan office. Annex III of the same royal decree establishes a minimum supply of 30 m³ of clean air per hour per employee for sedentary work, without prejudice to any additional requirements under the building's applicable thermal installation regulations. That is why two offices with the same floor area can provide very different working conditions.
Finally, layout and location matter. A well-designed office floor makes better use of every square metre than a larger but poorly organised one. Our article on how to organise an office provides practical guidance. Location also affects something that does not appear on the floor plan: how long employees take to commute and the image your business projects to clients. A smaller, well-connected office in central Madrid can deliver greater value than a much larger space in an area where everyone has to drive.
Frequently asked questions about office space per employee
How many square metres per employee does Spanish law require in an office?
Royal Decree 486/1997 requires 2 m² of free floor space and 10 m³ of unoccupied volume per employee, with a minimum ceiling height of 2.5 metres in offices. These minimums are calculated for each room after deducting furniture and equipment, and they are not recommendations for comfort.
Is furniture included when calculating the minimum free floor space per employee?
No. According to the INSST, the floor area and volume occupied by desks, machinery, cabinets and bulky equipment, as well as visitor chairs, are deducted from the total area and volume of the room. The employee's own chair is not deducted. The remaining area and volume are then divided by the number of employees.
How many people can work in a 100 m² office?
It depends on the type of work and the support areas required. Using an indicative range of 8 to 14 square metres per employee in a self-contained office floor, a 100 m² office can comfortably accommodate approximately 7 to 12 people. The legal maximum may be higher, but it is not a useful reference for creating a comfortable working environment.
How much office space per employee does a company with hybrid working need?
With hybrid working, workstation requirements should be calculated according to the day of peak attendance rather than the total workforce. If three out of every four employees are present at the same time, the square metres per employee can decrease considerably, provided there are shared desks, a booking system and enough meeting rooms and phone booths.
Which takes up more space: an enclosed private office or an open-plan workstation?
An individual enclosed office occupies considerably more space because it includes a desk, visitor chairs and its own enclosed area. An open-plan workstation is the most space-efficient option, although phone booths and meeting rooms must be provided for calls and meetings.
From how many employees does renting an entire conventional office floor become cost-effective?
There is no fixed number, but conventional office floors generally start at approximately 400 m². Using an indicative reference of 10 square metres per employee, this corresponds to teams of around 40 people. Below that scale, a flexible private office is usually more efficient because you only pay for the private space.
