Communal Spaces That Actually Get Used

Walk through a typical mid-rise residential building in Phnom Penh at six in the evening. The amenity floor on level 28 has two people sitting in it. The lobby lounge on the ground floor has fourteen. Both rooms were designed, finished, and paid for as communal space. Only one of them is being used.

This pattern repeats across the market. Buildings allocate entire floors to communal space that gets a few users a day, while small rooms near the entrance handle more traffic than they were ever sized for. The variable that controls this outcome has more to do with location than with equipment, finish, or view. It is the location of the room relative to where residents already need to walk.

The path versus the destination

Communal space behaves like retail. A shop on a corner that residents pass on the way home does several times the daily foot traffic of a shop two blocks off the route. The same logic operates inside a building. A space residents pass becomes part of their routine. A space they have to detour for becomes a special occasion.

Most amenity floors in this market are designed as destinations. The pool is at the top because the view sells the floor plan. The gym is next to it because the brochure pairs them. The lounge is on the same level because the architect was given a single floor and asked to fill it. The result is a stack of communal space that requires a deliberate trip, a separate elevator wait, and a wardrobe change to access.

A resident decides to use a space the way they decide to make any small daily effort. They calculate the cost of the trip against the value of the visit. Most days, the trip costs more than the visit returns.

The friction count

A useful way to read this is to count the friction units between a unit door and a communal space.

A friction unit is any decision the resident has to make. Take elevator. Press button. Walk down corridor. Use access card. Walk to a second elevator bank. Get changed. Each is one unit. Communal space at three or fewer friction units gets used by most residents weekly. At five units it is used by the gym regulars and almost nobody else. Above seven, the room is for guests and for the photographs.

The sky lounge is usually a six or seven friction unit space. The lobby cafe is a two. The podium garden, if accessed from the main lift lobby, is a three. Friction is the strongest single predictor of whether a communal space will be alive at year ten or empty at year three.

Visibility and the anchor reason

The communal spaces that get heavy daily use share two characteristics before any others matter. They are visible from a path the resident already takes. They have an anchor reason to visit.

Visibility matters because use is social. A resident is more likely to enter a lounge if they can see two other people already inside. A glass-fronted co-working space off the lobby will draw users a closed door cannot. The same room behind a solid wall on the same floor is invisible to the resident walking past, and invisible rooms stay empty.

The anchor reason is what gets the resident through the door the first time. Mail pickup, morning coffee, a quiet corner for a call between meetings, an early workout before work. Once an anchor is established, secondary uses follow. Without an anchor, the room is a renderable, not a destination.

The math of right-sizing

A 200-unit residential building typically generates daily amenity traffic from 15 to 25 percent of its residents. At an average of two residents per unit, that is 60 to 100 active users on a normal day, spread across the morning, evening, and weekend peaks.

A 400 square meter lounge sized for 80 people will feel empty with 12 in it. The same building with a 120 square meter lounge will feel full with 12 in it, and full rooms attract more users. Right-sizing is not a value engineering exercise. It is the difference between a room that feels alive and a room that feels abandoned.

The same math runs in reverse on the gym. A 60 square meter gym serving 400 residents is undersized. A 200 square meter gym in the same building can absorb the morning peak and the after-work peak without queuing. The wrong size in either direction kills usage.

Where the communal space decision actually lives

The decision that determines whether communal spaces will be used is made at the floor plan stage, before the first finish is selected. It involves choosing what sits on the path and what sits at the destination, how many friction units separate the resident from each room, and how the size of each room matches the population it serves.

Most of this is invisible at handover. The pool looks the same in the brochure whether it is used by 30 residents a week or by 5. The lounge looks the same in the photograph whether it is alive at six in the evening or empty at six in the evening. The difference shows up at year three, when residents start to talk about which rooms they actually use, and at year seven, when those rooms are the ones the management company still maintains properly because they are visibly worth maintaining.

A building with one well-placed, properly sized lobby lounge will deliver more daily community than a building with three under-used rooms stacked on a single amenity floor. The math is consistent. The discipline is choosing the lobby lounge instead of the second sky bar.

The communal space question is a usage question. A building can dedicate an entire floor to amenity and still feel empty at six in the evening.

The amenity that gets used is the amenity that sits on the path.

Owners studying a building's communal program tend to learn more from where the rooms are located than from how the rooms are finished. The work done at the floor plan stage rarely looks decorative, and it usually decides whether the building feels lived in or empty.

At Imajineer, this is the analysis we run before placing the communal program. The conversation is available when it is useful.