Smart buildings: how they work, benefits and examples transforming cities

Digitalisation is transforming the way we design, build and manage buildings. In this context, smart buildings or smart buildings have become a key element in improving energy efficiency, optimising resources and offering safer, more comfortable and sustainable spaces.

Far from being a futuristic concept, today smart buildings can be found in offices, hospitals, hotels, shopping centres, universities and even residential buildings. Thanks to the combination of sensors, connected systems, management platforms and data analysis, these properties can automatically adapt to the needs of their occupants and optimise their operation in real time.

But what is a smart building, how does it really work and what technologies make this new construction model possible? In this article you'll discover the characteristics that define a smart building, its main benefits, some of the most representative examples worldwide and the role that control and connectivity solutions play in enabling more efficient building management.

A smart building is a construction equipped with technologies capable of supervising, analysing and managing in an automated way the different systems involved in its operation. The aim is to optimise the consumption of resources, improve the comfort of users, reinforce safety and simplify the maintenance of the building.

To achieve this, a smart building integrates different technological systems that continuously exchange information. Lighting, climate control, ventilation, access control, security, energy consumption or environmental quality stop working as independent installations and become part of a connected ecosystem that works in a coordinated way.

This communication capability allows the building to make decisions automatically based on the information it receives. For example, it can reduce lighting in unoccupied areas, regulate climate control according to the occupancy of a room, optimise ventilation when CO₂ levels rise or detect anomalies in a piece of equipment before a breakdown occurs.

The evolution of digital technologies has driven the development of this type of building, turning them into an essential tool for responding to the new challenges of cities: reducing energy consumption, minimising emissions, improving the user experience and increasing operational efficiency.

Although they are often associated with large skyscrapers or corporate buildings, the reality is that the principles of smart buildings can also be applied in hospitals, educational centres, hotels, industrial facilities and even homes.

Want to know how these technologies also transform offices, hospitals or homes? Discover our article on smart spaces and how they improve people's experience.

The way a smart building operates is based on the connection between different technologies that collect information, analyse it and carry out actions automatically to optimise how the property behaves.

Although each project has its own specific characteristics, most smart buildings share four main technological pillars that work together to deliver intelligent management of all the installations.

1. Sensors: the eyes of the building

Sensors are the starting point of any smart building. Their role is to capture information from the environment and turn it into data that make it possible to know, in real time, what is happening in each space.

Today there are sensors able to measure very diverse parameters, including:

• Presence and occupancy of people.

• Level of natural lighting.

• Temperature and humidity.

• CO₂ concentration and air quality.

• Electrical consumption.

• Opening of doors and windows.

• Ambient noise.

• Water leaks or technical incidents.

All this information allows the building to adapt its operation automatically. For example, lighting can switch off when a room is left empty, climate control can reduce its power if occupancy drops or ventilation can increase when air quality worsens.

Thanks to this continuous monitoring capability, sensors form the foundation of building automation and make much more efficient management of all resources possible.

2. Connectivity and the Internet of Things (IoT)

Collecting information is only useful if all the devices can communicate with each other. This is where the Internet of Things (IoT) comes in, a technology that connects sensors, switches, light fittings, climate control equipment, security systems and other devices so that they can exchange information continuously.

In a smart building, each device stops working in isolation and becomes part of a network capable of sharing data and coordinating actions automatically.

Thanks to this connectivity it is possible, for example, to:

• Adjust the lighting based on the amount of natural light coming in.

• Regulate the climate control according to the actual occupancy of each room.

• Activate ventilation systems when CO₂ concentration rises.

• Manage access to certain areas through intelligent identification systems.

• Centralise the energy consumption of the whole building to detect savings opportunities.

In addition, connectivity makes remote supervision of the installations easier, allowing maintenance managers to know the status of the building from anywhere and act quickly in the face of any incident.

This constant exchange of information turns the building into a dynamic system, able to respond automatically to the changes that take place during its daily operation, improving both energy efficiency and the comfort of its occupants.

3. Control and management platform (BMS): the brain of the building

All the information generated by sensors and connected devices needs a system capable of interpreting it and coordinating the operation of the building. That role is played by the Building Management System (BMS) or building management system.

The BMS acts as the brain of the smart building. It is a centralised platform that supervises the different installations in real time, collects information from all the systems and makes it possible to automate their operation to optimise the overall performance of the building.

Through this platform, integrated management is possible for elements such as:

• Lighting.

• Climate control and ventilation.

• Access control.

• Lifts.

• Security and CCTV systems.

• Fire protection.

• Energy consumption.

• Electric vehicle charging infrastructure.

This centralised management makes it possible to detect incidents quickly, analyse how installations behave and make decisions based on real data. The system can automatically reduce climate-control consumption during weekends, change lighting schedules according to occupancy or send alerts when a piece of equipment is operating outside its usual parameters.

In addition, the BMS makes remote supervision of the building easier, giving managers a complete view of the status of all the installations from a single platform.

4. Artificial intelligence and data analysis

One of the biggest advances in smart building technology is the incorporation of artificial intelligence (AI) systems and advanced data analysis.

Whereas a traditional system only acts when it receives an order, a smart building can analyse large volumes of information to identify behavioural patterns and automatically optimise its operation.

Artificial intelligence can detect that certain rooms remain empty during particular time slots and automatically adjust climate control or lighting to reduce energy consumption. In the same way, it can anticipate occupancy peaks, adapt how equipment operates or spot anomalies that could turn into future breakdowns.

Thanks to the continuous analysis of data, the building stops merely reacting to changes and starts anticipating them, improving both efficiency and the user experience.

This learning capacity turns artificial intelligence into one of the pillars of the evolution of smart buildings, especially offices, hospitals, airports or large complexes where efficient management is essential.

The real intelligence of a building does not lie solely in having sensors or management platforms, but in the ability to integrate all the installations so that they operate in a coordinated way.

Building automation allows lighting, climate control, ventilation, blinds, security systems or access control to work together according to the conditions of the environment or the needs of users.

Imagine a meeting room. When it detects people coming in, the building can automatically turn on the lighting, adjust the temperature to a comfortable level, activate the ventilation and set up the necessary audiovisual equipment. When the room becomes empty again, all these systems automatically return to a low-consumption mode.

This type of automation not only improves the experience of those using the building, but also reduces energy consumption and simplifies the management of the installations.

In addition, integration makes it easier to incorporate new technologies as the building's needs evolve, making it possible to create more flexible, scalable infrastructures that are ready for the future.

The implementation of smart technologies completely transforms the way buildings are used and managed.

Beyond incorporating automated systems, smart buildings offer tangible benefits for owners, managers and the users themselves:

• Energy efficiency. One of the main aims of a smart building is to optimise energy consumption without giving up comfort. Thanks to continuous monitoring and the automation of the installations, the building uses only the resources needed at each moment. Lighting can adapt to the available natural light, climate control can adjust to actual occupancy and electrical equipment can run only when necessary. This optimisation significantly reduces energy consumption, cuts operating costs and helps achieve the decarbonisation targets that more and more regulations and environmental certifications demand.

• Greater comfort for occupants. A smart building also improves the daily experience of the people who use it. The automatic regulation of lighting, temperature, ventilation or air quality makes it possible to create healthier, more comfortable spaces, encouraging both well-being and productivity. In office buildings, for example, suitable lighting and a stable thermal environment can help improve concentration. In hospitals, automation makes it easier to deliver comfort for patients and professionals. In hotels, it allows a personalised experience to be offered to each guest. The building stops being a passive infrastructure and continuously adapts to the needs of its occupants.

• More advanced security. Technology also noticeably increases the level of security. Smart systems make it possible to integrate CCTV, access control, fire detection, technical alarms and installation monitoring within a single platform. This enables a much faster response to any incident and makes it possible to automate certain actions, such as unlocking doors during an evacuation, activating emergency protocols or immediately sending alerts to the responsible staff.

• Sustainability and carbon footprint reduction. Energy efficiency in buildings not only reduces economic costs, but also lessens environmental impact. Smart consumption control makes it possible to reduce CO₂ emissions, optimise water use, minimise energy waste and encourage more responsible use of the available resources. For this reason, smart buildings play a key role in urban sustainability strategies and in obtaining certifications such as LEED, BREEAM or WELL, which are increasingly common in new-build and refurbishment projects.

• Predictive maintenance. Traditionally, many breakdowns were only detected when the equipment stopped working. In a smart building, exactly the opposite happens. Continuous monitoring makes it possible to identify abnormal behaviour before a serious incident occurs. Unusual vibrations, excessive consumption or temperature variations can indicate that a piece of equipment needs a check. This predictive maintenance approach reduces breakdowns, prevents unexpected stoppages and extends the service life of the installations, while also lowering the costs associated with corrective maintenance.

• Enhancement of the real-estate asset. Incorporating smart technologies increases the value of a building both economically and functionally. Properties able to offer greater energy efficiency, lower operating costs, better environmental conditions and digitalised management are increasingly attractive to companies, investors and users. In addition, the growing regulatory demand around sustainability and efficiency means that smart buildings are better prepared to face the challenges of the future and maintain their competitiveness in the long term.

Although the concept of smart building may seem recent, there are currently many projects that show how technology is transforming the way spaces are designed, built and managed. These buildings combine automation, connectivity, energy efficiency and sustainability to deliver smarter operation tailored to the needs of their occupants.

Below we take a look at some of the most well-known smart buildings in the world, a reference for their innovation and for the way they integrate technology into their architecture.

The Edge (Amsterdam, Netherlands)

Considered one of the most advanced smart buildings in the world, The Edge stands out for its intensive use of connected sensors and intelligent management systems.

The building continuously monitors aspects such as space occupancy, lighting, climate control, temperature and energy consumption. Thanks to this information, it automatically adapts the operation of its installations to reduce energy spend and improve user comfort.

In addition, it incorporates thousands of IoT sensors distributed throughout the building and a mobile app that allows employees to personalise aspects such as their workstation, temperature or lighting.

The Crystal (London, United Kingdom)

Designed as an international reference in urban sustainability, The Crystal integrates multiple technologies to minimise the consumption of natural resources.

Its intelligent system controls climate control, ventilation, lighting and the use of natural light, in addition to managing rainwater collection and optimising the building's water consumption.

Thanks to these solutions, it has become one of the buildings with the best environmental standards in the world and an example of how technology can contribute to creating more sustainable cities.

Al Bahar Towers (Abu Dhabi, United Arab Emirates)

The Al Bahar Towers represent one of the best examples of intelligent architecture adapted to the climate conditions of their surroundings.

Its most recognisable feature is the dynamic façade, made up of thousands of moving panels that open and close automatically depending on the position of the sun.

This system reduces the solar radiation entering the building, lowers the need for climate control and significantly improves energy efficiency without giving up natural lighting.

The Bullitt Center (Seattle, United States)

Designed to function almost as a near-zero energy consumption building, the Bullitt Center is committed to integrated management of all its resources.

The building incorporates energy production from solar panels, intelligent lighting systems, controlled natural ventilation, permanent monitoring of consumption and advanced solutions for water management.

All of this makes the Bullitt Center one of the global references in sustainable construction and energy efficiency.

One Angel Square (Manchester, United Kingdom)

The corporate headquarters of the Co-operative Group is one of the most notable examples of integration between architecture, sustainability and automation.

The building uses sensors to control occupancy, optimise climate control and manage lighting automatically, considerably reducing energy consumption.

Its design also makes the most of natural ventilation and daylight, reducing its dependence on mechanical systems.

Capital Tower (Singapore)

Singapore has become one of the great global laboratories for the development of smart buildings, and the Capital Tower is one of its leading examples.

The building integrates digital platforms capable of monitoring the performance of the installations in real time, analysing consumption, optimising climate control and improving operational efficiency through the use of data.

Its intelligent management makes it possible to anticipate maintenance needs and ensure more efficient operation throughout the whole life cycle of the property.

22@ District (Barcelona, Spain)

More than a single building, 22@ Barcelona represents one of the largest European examples of urban transformation driven by technological innovation.

In this district, numerous office buildings and technology centres coexist, designed according to criteria of energy efficiency, connectivity, digitalisation and sustainability.

The integration of smart management systems, IoT solutions, energy monitoring and installation automation has turned 22@ into a reference for the development of smart buildings in Spain and into a model of a city oriented towards knowledge and innovation.

When we talk about a smart building, it's common to think of digital platforms, sensors or artificial intelligence. However, the real efficiency of a smart building starts much earlier: in each of the elements that make it possible to interact with the building.

Switches, mechanisms, sensors, lighting regulation systems and control solutions are part of a connected infrastructure that makes automation and intelligent management of the installations possible. Each of these devices generates information, carries out actions and contributes to optimising the overall operation of the building.

That is why the intelligence of a building does not depend solely on the software that manages it, but also on the ability of all its components to integrate within the same technological ecosystem.

In this context, Simon's solutions make it possible to combine connectivity, automation and energy efficiency without giving up design or user experience. Systems such as Simon iO make it easier to integrate lighting and other devices within intelligent control platforms, allowing spaces to be managed in a more flexible way, adapted to the needs of each project.

At the same time, the design of switches and control solutions is conceived to integrate naturally into architecture and interior design projects, showing that technological innovation can also contribute to creating more functional and visually harmonious spaces.

This commitment to innovation goes hand in hand with a commitment to sustainability. Simon develops solutions that encourage more efficient management of resources and, in certain product ranges, incorporates materials with Cradle to Cradle Certified® Gold (C2C Gold) certification, a recognition that promotes more responsible design models aligned with the principles of the circular economy.

All of this means that technology stops being an isolated element and becomes an integrated part of the building, able to improve efficiency, comfort and sustainability without compromising the aesthetics of the architectural project.

1. How is a smart building different from a home-automation one?

Home automation focuses mainly on automating functions within a home, whereas a smart building integrates and manages multiple installations in a centralised way, such as lighting, climate control, security or access control, in both residential and commercial buildings.

2. What benefits does a smart building offer its occupants?

Smart buildings offer greater comfort, better environmental quality, greater security and more efficient use of energy. In addition, they automate everyday tasks and adapt the operation of the installations to the real needs of people.

3. What certifications can a smart building obtain?

Many of these buildings aim for certifications such as LEED, BREEAM or WELL, which assess aspects related to energy efficiency, sustainability, the well-being of occupants and the environmental impact of the building throughout its life cycle.

4. Is it possible to turn an existing building into a smart building?

Yes. By incorporating sensors, control systems, connected solutions and management platforms, it is possible to modernise existing buildings without having to rebuild them, improving their efficiency, security and operation.

5. What role does the Internet of Things (IoT) play in a smart building?

The Internet of Things (IoT) connects sensors, devices and systems so that they can exchange information in real time. This communication makes it possible to automate processes, optimise energy consumption and manage the building more efficiently.