How much city actually fits into one cubic meter? Anyone talking about building volumes today is no longer just talking about numbers on a plan. Cubic volume has become the fateful question of architecture – between maximizing space, redensification and the ecological imperative. Time for a ruthless stocktaking: What does building volume really mean? And why does its intelligent development determine the future of our cities?
- Building volume is more than just a mathematical quantity – it is a political, economic and creative instrument of power.
- In Germany, Austria and Switzerland, cubic volume is increasingly becoming an arena for sustainability, resource efficiency and social debate.
- Digital tools and artificial intelligence are radically changing design practice – from volume studies to parametric urban planning.
- Today, sustainable building means that every cubic meter of airAIR: AIR steht für "Architectural Intermediate Representation" und beschreibt eine digitale Zwischenrepräsentation von Architekturplänen. Es handelt sich dabei um einen Standard, der es verschiedenen Software-Tools ermöglicht, auf eine einheitliche Art auf denselben Datenbestand zuzugreifen und ihn zu bearbeiten. counts, every shadow cast is relevant.
- Planners must master technical, legal and ecological dynamics in order to manage building volumes responsibly.
- Criticism is directed at land sealing, urban density and investor logic – while visionaries call for new typologies and ways of life.
- The topic of building volume links local planning with global trends such as climate protection, digitalization and social innovation.
- The future of building volume lies in the intelligent control of mass, space and impact – not in square meter fetishism.
Building volume: from a gray number to a colorful line of conflict
Anyone who considers building volume to be a dry key figure has not understood the seriousness of the situation. The cubic volume determines how densely and high our cities grow, how much light reaches the window and whether the wind whistles around the corner or gets caught in heat loops. In Germany, Austria and Switzerland, the discussion about building volume has long since moved from the files of building authorities to the front pages of the arts pages. The battle for living space, the struggle for energy efficiency and the pressure for redensification have made volume a strategic variable. There is hardly a development plan that is not haggled over down to the last cubic centimeter. In Munich and Zurich, every additional storey is fought over, in Vienna over the question of how much density is socially acceptable. The concept of building volume has become the currency of urban progress – but also a bone of contention. And this is where it gets exciting: because every decision about cubature is a decision about social priorities. Is it about maximum profit, quality of life or CO₂ balances? The building volume is the interface where all these goals collide.
But the days when planners used a ruler to mark out the cubic volume on a plot of land are definitely over. Today, volume is a highly political game in which climate regulations, noise protection, shadingShading beschreibt ein Phänomen bei Teppichböden, bei dem sich bestimmte Stellen des Belags durch Licht- und Schattenwirkungen unterschiedlich dunkel darstellen. Es handelt sich dabei um eine optische Täuschung, die durch die Struktur des Teppichbodens verstärkt wird. analyses and energy laws play a role. The requirements are growing, the scope is shrinking. A paradoxical situation: cities are expected to densify and at the same time create green oases, save space and increase quality of life, protect neighbors and not scare away investors. Building volume has become the touchstone by which planning courage and political nerve are measured. Those who weaken here will be punished – in the form of lawsuits, public protests or projects that are simply not approved. The dispute over cubature has long been a proxy conflict for everything that makes up the city today.
At the same time, the technical possibilities for calculating, simulating and optimizing volume are growing. Digital tools make it possible to run through variants in fractions of a second, analyze shadingShading beschreibt ein Phänomen bei Teppichböden, bei dem sich bestimmte Stellen des Belags durch Licht- und Schattenwirkungen unterschiedlich dunkel darstellen. Es handelt sich dabei um eine optische Täuschung, die durch die Struktur des Teppichbodens verstärkt wird., simulate wind currents and even predict the subsequent energy balance. But this also brings new problems: Those with the best algorithms can trick the development plan. Those who don’t understand the data are left out. Building volume has become a question of data – and of who builds the better models.
Switzerland shows how it can be done: There, volume studies have long been an integral part of the planning culture, competitions are tendered according to cubature and spatial effect, not just square meters. In Austria, on the other hand, building volumes are increasingly being assessed according to ecological and social criteria. The German debate, on the other hand, is still often characterized by mistrust and defensiveness: More volume is quickly seen as a threat, less as an opportunity. But this way of thinking falls short. Because the question is not how much is built – but how wisely the volume is handled.
What counts in the end is the effect: how can building volume be managed in such a way that it creates added value – for the city, for the climate, for people? This question arises in every building permit, in every investor discussion and in every neighborhood meeting. If you want to answer it, you have to be able to do more than just calculate. They have to design, mediate and think ahead. The building volume is more than just a number – it is the touchstone of architectural sustainability.
Cubature and sustainability: between resource constraints and the desire to innovate
The ecological turnaround has finally taken building volume out of the ivory tower of technology. Today, every cubic meter is responsible. Emissions, gray energy, shadows cast – all of this is directly linked to the cubic volume. In the DACH region, the issue of sustainability is now becoming the guard rail for every volume decision. The number of building applications that fail due to environmental requirements is increasing. At the same time, the pressure to accommodate living space and infrastructure more efficiently is growing. Squaring the circle? Almost. Because sustainable cubature means using every resource multiple times: Stacking spaces, mixing functions, making buildings flexible in their layout.
Anyone planning a new district in Berlin, Zurich or Graz can no longer avoid the question of volume. The days of wasting space are over. Land is scarce, climate targets are ambitious and the population is growing. The solution is intelligent densification. But how much density is acceptable? When does well-being start to deteriorate? Architects are faced with the task of designing the cubature in such a way that it promotes social interaction but does not stifle it; that it protects the climate but does not isolate it. This is where the wheat is separated from the chaff. If you only focus on maximizing living space, you miss the real goal: sustainable quality of life.
Innovative projects show how it can be done. In Vienna, residential buildings are being built in which the volume is specifically used to create communal areas – roof gardens, open halls, flexible floor plans. In Zurich, new urban districts are being modeled in such a way that wind and sun are optimally used to improve the microclimate. In Germany, planners are experimenting with timber hybrids, which consume significantly less gray energy than concrete buildings with the same cubic volume. The technical challenge: today, every cubature has to be tested several times – in terms of energy, acoustics and ecology. This is an effort, but also an opportunity. Because if you have the parameters under control, you can use volume as a resource.
But the reality is tough. Many building authorities are overwhelmed by the complexity, many investors only see the return on investment, many residents fear the shadow. The result: projects are talked up, delayed, watered down. Sustainable cubature often remains a theory. Yet solutions have long been available: smart simulations, participatory planning processes, new building materials and adaptive systems. But there is a lack of courage, knowledge – and sometimes simply a lack of desire to break new ground. The cubature remains the touchstone on which sustainability must prove itself.
Another problem is that the ecological footprint of building volumes is often underestimated. Every additional storey means more material, more energy requirements and more emissions. The trick is to achieve more with less – to use space multiple times, to design rooms flexibly, to minimize building volumes without losing quality of life. This is only possible if technology and design go hand in hand. Anyone who ignores this is building past the future.
The international discourse shows where the journey is heading: in Asia, volume models have long been linked to climate data and user flows, while in Scandinavia buildings are being built whose cubature adapts to the seasons. The DACH region must be careful not to fall behind. The future of cubature is digital, ecological and social – or it isn’t.
Digitalization and AI: the new mathematics of construction volume
Anyone who still thinks of building volumes in terms of manual calculations and hatching has missed out on the digital revolution. Today, parametric models, AI-based simulations and automated variant studies are the measure of all things. In Germany, Austria and Switzerland, digitalization is finding its way into design processes – slowly but steadily. The new generation of software can not only calculate areas, but also visualize shadingShading beschreibt ein Phänomen bei Teppichböden, bei dem sich bestimmte Stellen des Belags durch Licht- und Schattenwirkungen unterschiedlich dunkel darstellen. Es handelt sich dabei um eine optische Täuschung, die durch die Struktur des Teppichbodens verstärkt wird. in real time, simulate wind flows, optimize usage density and forecast energy effects. The building volume becomes a variable variable that can be adjusted at the touch of a button. As a result, the design is no longer linear, but a dynamic process in which every decision has an immediate impact.
AI-supported systems now analyze millions of design variants and check them for approvability, sustainability and user comfort. In Zurich, entire districts are modeled with such tools, in Vienna alternative cubatures for densification are run through, in Munich automated feasibility studies are created for investors and local authorities. The advantages are obvious: fewer errors, more transparency – and a drastic acceleration of planning processes. But there are also downsides: If you don’t understand the algorithms, you lose control. Those who rely on digital black boxes risk making technocratic mistakes. The new mathematics of construction volumes requires technical expertise and critical reflection.
Another field: digital twins. They make it possible not only to simulate volumes, but also to control them in real time. Sensor data flows directly into planning, user behavior can be analyzed and taken into account. In Hamburg, a pilot project is underway in which the construction volume of a new city district is dynamically adapted to actual demand – with the help of AI and big data. This is not only technically challenging, but also politically controversial: who decides what volume is approved? The software, the authority or the investor? Digitalization is turning the traditional balance of power on its head.
At the same time, it opens up new opportunities for sustainability and participation. Simulations make the effects of volume decisions visible before construction begins. Citizens can compare variants, planners can react quickly to objections. AI is becoming a mediator between aspiration and reality. But it is also a risk: algorithms do not know social justice, aesthetics or gut feeling. They optimize according to numbers, not feelings. Those who use digitalization must master it – otherwise the building volume will become a black box.
In an international comparison, the German-speaking countries are still at the beginning. In Singapore and Scandinavia, digital volume models have long been integrated into urban planning, while in Switzerland there are pilot projects for AI-based density planning. Germany is lagging behind – the fear of losing control is too great and the digital competence of many administrations is too low. The future of construction volume is digital – those who do not accept this will be left behind.
The big question remains: How can digital tools be used in such a way that they not only make the construction volume more efficient, but also better? The answer lies in the combination of technology, design and social responsibility. Digitalization is not a panacea – but it is the prerequisite for controlling the construction volume of tomorrow, not just managing it.
Architecture between density, debate and vision: building volume as a leitmotif
The discussion about building volume has long since become a fundamental debate in architecture. There is hardly a competition that is not characterized by the question of how much density the district can tolerate, how much mass the cityscape can withstand. The profession is under pressure: on the one hand, architects have to fit more space into less space, and on the other, they have to ensure quality of life, sustainability and aesthetics. The building volume thus becomes a touchstone for creativity and courage. Those who cling only to specifications end up with interchangeable boxes. Those who dare to think of new typologies – cluster apartments, hybrid buildings, modular systems – can create completely new living environments with the same cubature.
But the debate is emotionally charged. Residents fear shadingShading beschreibt ein Phänomen bei Teppichböden, bei dem sich bestimmte Stellen des Belags durch Licht- und Schattenwirkungen unterschiedlich dunkel darstellen. Es handelt sich dabei um eine optische Täuschung, die durch die Struktur des Teppichbodens verstärkt wird., noise and loss of value. Investors demand maximum utilization, planners warn of urban monotony. In Zurich, the dispute is ignited by every new high-rise building, in Munich by every redensification, in Vienna by every perimeter block development. Cubature has become a symbol – for densification or displacement, for progress or loss. Architecture must communicate, explain and convince. This is not an easy task, but a rewarding one. Because behind every discussion about volume lies the question: Who owns the city?
Visionary voices are calling for a radical rethink: out of the logic of square meters and into the multifunctional city. Building volume not as an end in itself, but as an instrument of social innovation – for more community, more flexibility, more quality of life. In Switzerland, projects are being developed that use volume as a climate buffer, while in Germany architects are experimenting with adaptive building envelopes that change their volume seasonally. The cubature is becoming a stage for experiments – and a yardstick for the future viability of architecture.
Criticism is inevitable. Many building regulations are outdated, hinder innovative solutions and cement the status quo. The discussion about building volumes often becomes a bureaucratic petty war – instead of a driving force for better cities. But international discourse shows that there is another way. In the Netherlands, Scandinavia and Asia, volume models are used as tools for urban innovation – not as a restriction, but as an opportunity.
What does this mean for architects? Technical knowledge is no longer enough. Anyone working successfully with building volumes today has to be a mediator, designer, digital strategist and sustainability expert at the same time. Cubature is not an end in itself, but the interface between aspiration and reality, between vision and everyday life. It is the yardstick by which architectural quality, social progress and ecological rationality can be measured.
Conclusion: The future of cubature is smart, digital and bold
Building volume has long been more than just a calculation parameter. It is the lever with which cities control their future – or gamble it away. In Germany, Austria and Switzerland, the way cubature is handled determines density, climate resilience and quality of life. Digital tools and AI open up new possibilities, but also place new demands on technical and ethical expertise. The sustainable future of building volume lies in the intelligent combination of technology, design and social responsibility. Those who view cubic volume merely as a number are building on the past. Those who see it as an opportunity are shaping the city of tomorrow.