The costs of the Olympic Stadium modernisation and refurbishment project were almost EUR 127 million higher than estimated in the project plan. Additional and alteration work increased the costs the most. Another reason for the cost overrun is the fact that the costs of the project plan were not tied to the tender price index.

The Urban Environment Division and Helsinki City Housing Company have taken numerous measures to reduce emissions. In order for the objectives of the Carbon-neutral Helsinki 2035 action plan to be achieved on schedule, a considerable number of energy refurbishments of private housing companies will be required.

Not all large-scale traffic projects of the City have been implemented in such a way that it would be possible for them to stay within the original cost estimate or schedule.

The City is unable to monitor the great number of worksites to a sufficient degree or intervene in operations efficiently enough in the event of issues. Disturbances caused by street construction sites are assessed by major professional construction operators, but they are only responsible for roughly half of the excavation sites within the city.