The global smart city market is expected to see significant growth: the scale is predicted to exceed 15 billion US dollars by 2035.

Introduction

Smart city construction has become a core topic in global infrastructure development. As urban populations continue to swell and digital technologies penetrate every aspect of life, governments and private sectors worldwide are accelerating smart city projects. According to the latest report from Market Research Future, the global smart city market size is expected to grow from USD 23.7 billion in 2024 to USD 150.5 billion by 2035, with a compound annual growth rate (CAGR) of 18.3%. Behind this figure lies a grand engineering blueprint integrating the Internet of Things, big data, and artificial intelligence across areas such as transportation, energy, and public safety.

Project Background and Development

Smart city is not a single project but a comprehensive ecosystem covering hardware, software, and services. The report indicates that hardware (e.g., sensors, communication devices, surveillance systems) currently holds the largest market share, but software applications are rapidly gaining ground. At the application level, utilities (smart energy, water management, waste management) represent the largest segment, while smart transportation is the fastest-growing area—cities are heavily investing in smart parking management, smart ticketing, and intelligent transportation systems to alleviate congestion and improve travel efficiency.

Globally, North America and the Asia-Pacific region are hotspots for smart city investment. Europe, under the framework of the European Green Deal, plans to invest over 100 billion euros in smart city-related projects. Asian countries such as China, India, and Singapore are driving urban digital transformation through national strategies, exemplified by China’s "New Smart City" initiative.

Industry Impact

The development of smart cities has a profound impact on the engineering and infrastructure construction industry. First, it creates new market opportunities for large engineering contractors, equipment manufacturers, and technology companies. Traditional engineering firms such as Bechtel, Vinci, and China State Construction are shifting from pure civil engineering to integrated digital solutions; while tech giants like Siemens, Cisco, Huawei, and IBM are directly involved in building city operating systems, data centers, and communication networks.

Second, smart infrastructure places higher demands on the supply chain—from sensors, cameras to edge computing servers and 5G base stations—all requiring more efficient and reliable hardware supply. This drives technological upgrades in related fields such as construction machinery, automation equipment, and construction robots.

Furthermore, sustainable buildings and low-carbon engineering have become intrinsic requirements for smart cities. The green building market is expected to reach USD 1.6 trillion by 2025, mutually reinforcing smart city investments. Technologies such as Building Information Modeling (BIM), digital twins, and intelligent construction management are widely used to optimize energy use and reduce carbon emissions.

Challenges and RisksDespite the promising prospects, the development of smart cities still faces multiple challenges. Data privacy and cybersecurity are primary concerns—leakage of data generated by massive sensors and surveillance equipment could trigger serious social issues. System integration across different vendors is difficult, and the lack of unified standards leads to the widespread phenomenon of "data silos." In addition, the initial investment for projects is huge, with a long return period; some cities' fiscal pressures and political transitions may affect project sustainability.

Future Outlook

Looking ahead to 2035, smart cities will no longer be scattered pilot projects but will become the basic configuration of modern cities. Urban management will rely more heavily on real-time data and AI-driven decision-making, and systems such as transportation, energy, public safety, and environmental monitoring will achieve end-to-end interconnectivity. The public-private partnership (PPP) model will become the primary implementation approach, and long-term capital from international development institutions and pension funds will show strong interest in digitalizing infrastructure.

Conclusion

The global trend in infrastructure investment is shifting from mere physical expansion to intelligent and green transformation. The acceleration of urbanization and the demands of industrial modernization are intertwined, making smart cities a core growth driver for the engineering industry over the next few decades. Whether it involves upgrading existing stock in developed countries or building new cities in emerging markets, digitalization and sustainability will run through the entire process. For engineering companies and technology suppliers, the technological accumulation of the past decade has paved the way, and the curtain has just risen on the next wave of industrial upgrading.

--- *Some data and trends in this article are referenced from Market Research Future's report "Smart City Market Overview, Size, Share Report & Trends 2035" (Report ID: MRFR/SEM/1955-CR).*