The city of Boston projected it would cost the college approximately $600,000 to complete the Walker Building facade restoration project, according to a publicly available construction permit.

Contractors will begin a three-week process of installing scaffolding on the Boylston Street and Boylston Place Alley sides of the Walker Building starting on April 1, according to a community-wide email sent from the college on March 22.

The Boylston Place Alley and Boylston Street sides of the building include the north and west facades. The college expects the construction to continue through October 2019.

The scaffolding will prepare the building for exterior renovations, including facade repair, painting of existing window frames, and replacing windows on the west side of the building, according to the email.

It is unclear how much the college paid for the project other than the evaluations available in the city’s projections.

Vice President for Government and Community Relations Peggy Ings said she did not know if the construction on the Walker Building would have any impact on the college’s Boylston Street sidewalk expansion project.

Construction on the Walker Building prompted the college to erect scaffolding in February 2018, when subcontractors removed pieces of Walker Building’s exterior in preparation for future renovations.