Saudi Arabia's construction sector witnessed significant growth in 2020 despite the challenges posed by the COVID-19 pandemic. The government's commitment to diversifying its economy and investing in infrastructure projects was a key factor in driving the sector's growth.

One of the most significant projects in 2020 was the Jeddah Tower, set to become the world's tallest building upon completion. The project, valued at over $1.2 billion, is expected to create thousands of jobs and contribute significantly to the local economy.

Another major project was the construction of the Al-Haramain High-Speed Railway, which connects the holy cities of Mecca and Medina. The $7 billion project is part of the government's efforts to improve transport links and support the growing number of pilgrims visiting the country.

The government also continued to invest in the development of affordable housing, with plans to build over 500,000 new homes by 2030. In 2020, several large-scale housing projects were launched, including the Al-Kharj City project, which will provide housing for over 200,000 people.

In addition to these projects, the government also focused on developing its energy sector, with plans to increase its renewable energy capacity to 9.5 GW by 2030. Several solar and wind power projects were launched in 2020, including the Dumat Al-Jandal wind farm, which will have a capacity of 400 MW once completed.

In conclusion, despite the challenges posed by the COVID-19 pandemic, Saudi Arabia's construction sector saw significant growth in 2020, driven by the government's commitment to diversifying the economy and investing in infrastructure projects. The sector is expected to continue its growth in the coming years, as the government continues to invest in major projects such as the Jeddah Tower, Al-Haramain High-Speed Railway, and affordable housing.