Common Ground: Who Owns the Space Between Buildings?

Shared space, responsibility and life beyond the plot.

Between the buildings there is a great deal of space, and almost nobody is responsible for it.

On drawings it is pale green. There are trees at three incompatible scales, people walking in several directions, and a child running with impressive confidence towards something outside the frame.

In reality that space has to absorb access, fire routes, parking, drainage, waste, deliveries, bicycles, planting, play, privacy, and the occasional person who would like to sit down.

It is where the idea of common ground meets the technical plan, and the technical plan tends to win on points.

Shared by whom?

The legal categories look clear — public, private, shared. Use is less obedient.

A privately owned courtyard can function as part of the neighbourhood. A formally public space can feel closed. A shared garden can be available to everyone and used by nobody. Ownership does not decide whether a space feels common; access, visibility, scale, comfort and the surrounding buildings do. People need to understand where they are allowed to be, what they may use, and whether sitting there will make them feel welcome or faintly criminal.

Good shared space has legible edges. Complete openness produces hesitation, complete separation produces nothing at all. A fence answers the question at the cost of ending the conversation. Level changes, planting, low walls, thresholds and orientation can establish degrees of privacy without dividing a site into territories.

Not the leftover

Common ground cannot be designed after the buildings, the access road and the parking have taken what they need.

By then, it is usually too late. What remains may qualify statistically as open space while being narrow, shaded, fragmented or occupied by infrastructure.

It has to be part of the first spatial decision, which in practice means arguing for it before anyone has drawn a floor plan they have become fond of.

At Gratwein am Grünanger the seven buildings are positioned to produce a sequence of connected outdoor areas rather than one undefined lawn. Public play areas and open green space are complemented by semi-public residents' gardens, raised planting beds and private gardens. The spaces overlap visually and remain distinct in use, so residents can take part in shared life without every trip outdoors becoming a public appearance. The communal room, the gardens and the play areas offer occasions to meet. They do not prescribe a lifestyle. Nobody should have to demonstrate community spirit on the way to the bins.

Maintenance is a design question

Shared space requires shared responsibility, which is the point at which most attractive plans go quiet.

Who maintains the planting. Where the water connection is. Who owns the tools and where they live. Whether residents may change the garden or must keep it as drawn. What happens to the raised beds planted with enormous enthusiasm in April and abandoned by the second week of August.

These are not soft questions to be settled later by a property manager. They are design questions with spatial consequences: robust surfaces, storage that can actually be reached, planting matched to the maintenance that will realistically exist, and responsibilities written down before the first summer. A shared garden without a maintenance strategy is optimism drawn at 1:200.

Residents should also be able to alter common space over time. A courtyard that succeeds only while it still resembles the handover photograph is a fragile piece of architecture and usually a vain one. Use leaves marks. Furniture migrates. Children invent a shortcut through the planting within days of it being finished. Common ground becomes genuinely shared at the point where people are allowed to affect it.

Beyond the property line

The space between buildings also shapes the wider neighbourhood.

Paths can connect to existing routes or stop abruptly at the site boundary. Ground floors can address the street or turn away from it. Shared functions can contribute to public life or remain hidden inside the development. Housing does not stop at the front door, and architecture does not stop at the cadastral line.

This does not mean that every private development must provide a public square. It means understanding that buildings always participate in a larger spatial system. Their entrances, edges, open spaces and circulation affect people who may never enter them.

Common ground is therefore not one particular type of space. It is a relationship between ownership, use and responsibility. It works when boundaries are understandable, participation remains voluntary and care has been considered before the first resident discovers that nobody knows where the garden hose is.

The rest is maintenance.

Architecture’s least glamorous and most honest sequel.