Seat density and what it costs you
| Density | Sq ft per seat | Product | The trade-off |
|---|---|---|---|
| Very high | 40 – 50 | Budget hot-desking | High churn, poor acoustics, low renewal; works only on price |
| High | 55 – 65 | Mainstream coworking | Viable with strong acoustic zoning and enough booths |
| Standard | 65 – 75 | Premium coworking and managed offices | The sweet spot for renewal rates in Indian metros |
| Low | 80 – 100 | Enterprise managed office | Priced per seat at a premium; expected by corporate occupiers |
| Private cabin | 45 – 60 within the cabin | Team suites of 4–20 | Cabins subsidise the open floor in most operating models |
Square feet per seat is calculated on total leasable area including circulation, meeting rooms, pantry and washrooms — not on the desk footprint.
Density is an acoustic decision before it is a revenue one
Acoustic zoning, which is the whole design problem
Everyone in a coworking space is on a call, and none of them are on the same call. Zoning is what makes that survivable, and it is done in plan, not with absorption panels added later.
- Three zones, physically separated. A quiet zone with a no-call rule, a general working zone, and a social and collaboration zone near the pantry. Put them in that order from the quietest corner outward.
- Never put the pantry next to the quiet zone. It sounds obvious and it is the single commonest planning error in the sector.
- Phone booths at one per 12–18 seats. A booth is roughly 12 sq ft and earns its area many times over in renewal. Specify 34 dB acoustic performance, active ventilation and a light that comes on with occupancy, or nobody will use it in a Mumbai summer.
- Absorb the ceiling first. An exposed-services ceiling looks right for the sector and sounds terrible. Rafts or a sprayed absorptive finish over 40–60% of the area is the highest-value acoustic spend available.
- Break the sightlines and the sound paths together. A 1,400 mm high storage run between desk banks does more for speech privacy than a 1,200 mm screen at the desk.
- Mask what remains. A low-level sound masking system at 45–48 dBA costs ₹80–₹160 per sq ft and turns intelligible speech into background noise, which is what members actually want.
Amenity ratios
| Amenity | Provision | Note |
|---|---|---|
| Phone booths | 1 per 12 – 18 seats | 12 sq ft each; the highest-return space in the building |
| Meeting rooms | 1 per 25 seats | In three sizes: 4-seat, 8-seat and 12-seat |
| Focus or quiet room | 1 per 60 seats | Not a meeting room; a silent room for two to four people |
| Pantry | 1.2 – 1.8 sq ft per seat | Plus a separate coffee point beyond 150 seats |
| Washrooms | As per code, then add 20% | Under-provision here generates more complaints than anything except booths |
| Lockers | 1 per hot-desk member, 0.6 per dedicated | 300 × 400 × 450 mm, with power inside |
| Event or town-hall space | Above 200 seats | Usually the pantry, designed to clear |
| Wellness or nursing room | 1 above 100 seats | Lockable, with a basin and a fridge |
Services, which are two to three times a normal office
- Power. Two sockets and a data point per seat as a minimum, plus booth and meeting room loads. Allow 55–75 VA per sq ft against the 35–45 a conventional office is designed to.
- Network. Access points on a proper survey, not one per room. A coworking floor has three to four devices per member, and Wi-Fi complaints are the most common reason members leave.
- Cooling. A dense floor generates more heat per square foot than a conventional office and occupancy varies hour to hour. Zone the HVAC and give the meeting rooms and booths their own control.
- Fresh air. At 55 sq ft per seat, code minimum ventilation will not keep CO₂ below 1,000 ppm in a full meeting room. Size the fresh-air supply to the seat count, and put a CO₂ sensor in the largest room.
- Access control. Door controllers, credentials and a booking system that talks to them. Cable it at first fix even if the system is chosen later.
- Cable management that survives reconfiguration. Underfloor or overhead busbar with drop points, not a fixed floor box grid that dictates the desk layout for the next five years.
Operators ask us to add ten desks. We ask them what the renewal rate is. Ten desks and two fewer booths is a very expensive way to lose eight members.
Greenbox commercial fit-out lead
Rates by product tier
| Tier | ₹ per sq ft, ex-GST | Programme | What it includes |
|---|---|---|---|
| Value coworking | ₹1,720 – 2,580 | 8 – 11 weeks | Open desking, basic booths, one pantry, minimal branding |
| Mainstream coworking | ₹2,120 – 3,180 | 10 – 14 weeks | Zoned floor, acoustic ceiling, full booth and meeting provision |
| Premium coworking | ₹2,600 – 3,900 | 14 – 18 weeks | Designed interiors, sound masking, event space, wellness room |
| Enterprise managed office | ₹2,640 – 3,960+ | 14 – 20 weeks | Client-branded, higher spec, dedicated services and reception |
Ex-GST. Includes civil, ceilings, flooring, joinery, electrical, data containment, acoustics and lighting. Excludes loose furniture, AV, IT hardware and landlord-mandated works. The bands are taken from workspace fit-outs we have billed and completed, audited line by line and restated at October 2026 prices.
Designing for reconfiguration
A coworking floor is re-planned every eighteen to thirty months as the mix between hot desks, dedicated desks and private cabins shifts. Designing for that from the start costs very little and saves a great deal.
- Demountable cabin partitions, not blockwork. A glazed demountable system at ₹1,100–₹2,200 per sq ft of partition can be moved in a weekend; a blockwork wall cannot be moved at all without debris, dust and a fortnight.
- A ceiling grid that accepts a partition anywhere on a 600 mm module. Where the partition head has to land on a ceiling joint, the layout is fixed the day the ceiling is closed.
- Lighting on a track or a repeating grid, so a new cabin is lit correctly without rewiring. Bespoke pendant positions over a specific desk layout are a decision you will regret.
- Power from an overhead busbar or a raised floor, with drop points that can move. A fixed floor-box grid cast into the screed dictates every future desk layout.
- Sprinkler and detector heads planned against the partition module, because moving a sprinkler head is a landlord-vendor job with a lead time and a permit.
- Furniture on a single desking system in two or three sizes, so benches can be split and recombined rather than replaced.
Where we work
We design coworking and managed office space nationally and build it across Mumbai. For Grade-A landlord manuals, BKC and Andheri East rates and the rent-to-seat arithmetic in this city, see coworking interior designers in Mumbai. For conventional workplace, see office interior design.
Selected commercial work by Greenbox Design Studio. Tap any image to enlarge.
Frequently asked questions
How many square feet per seat should a coworking space allow?+
Fifty-five to eighty-five including all common areas, depending on the product. Below fifty-five the acoustic experience degrades and churn rises faster than the extra seats earn. Sixty-five to seventy-five is where renewal rates hold best in Indian metros.
How many phone booths does a coworking floor need?+
One per twelve to eighteen seats. At twelve square feet each they are the highest-return space in the building, and an under-provision of booths is the most common complaint in the sector. Specify 34 dB acoustic performance, active ventilation and occupancy-triggered lighting, or they will not be used.
What does a coworking fit-out cost per square foot?+
₹1,720–₹2,580 for value coworking, ₹2,120–₹3,180 mainstream, ₹2,600–₹3,900 premium and ₹2,640–₹3,960 and above for an enterprise managed office, all ex-GST. That covers civil, ceilings, flooring, joinery, electrical, data containment, acoustics and lighting, but not loose furniture, AV or IT hardware.
How do you stop a coworking floor being too noisy?+
Zone it in plan first — quiet zone, general working zone and social zone in that order from the quietest corner — then absorb the ceiling over 40–60% of the area, then use 1,400 mm storage runs between desk banks to break sound paths. A sound masking system at 45–48 dBA finishes the job for ₹80–₹160 per sq ft.
How much electrical capacity does a coworking floor need?+
Fifty-five to seventy-five VA per sq ft against the thirty-five to forty-five a conventional office is designed to, because of seat density, booth and meeting room loads and the number of devices per member. Check the landlord's available supply against that figure before signing, not after.
What is the right meeting room provision?+
About one per twenty-five seats, in three sizes — four, eight and twelve — all on the same booking system, plus a silent focus room for two to four people per sixty seats. The focus room is not a meeting room and should not be bookable as one.