In the fourth year of construction, the organizers of a major revitalization project at Union Station are asking the City of Toronto for more money.

A report filed by Josie Scioli, the Toronto's chief corporate officer, seeks $550,000 in funding beyond the initial $1.5-billion, to cover lawyer costs.

Scioli wrote that unexpected delays in construction may lead to lawsuits that could affect the project’s final price tag.

She recommends the city provide the project's lawyers with the additional sum for required construction law support services. If approved, the new legal budget for the project would be $1.5 million, excluding taxes.

The Union Station project began in 2010, and includes a new passengers lounge, upgraded washrooms, structural repairs, and a new cooling system.

The project is expected to be completed by the end of 2016.

With files from CTV Toronto's Natalie Johnson