A rendering of what the MLK Library could look like with two floors added on top and a roof garden.

As part of Mayor Vince Gray’s 2014 budget being released today, the city’s libraries will see an infusion of cash targeted at modernizing the aging Martin Luther King, Jr. Memorial Library and keeping neighborhood libraries open seven days a week.

Gray included $103 million in the city’s capital budget to renovate the Martin Luther King, Jr. Memorial Library, which sits inside the four-decade-old Mies van der Rohe-designed building in Gallery Place. According to administration officials, the money will go towards modernizing and expanding the building so that it can take on a second tenant, an option that stems from a recommendation made by an Urban Land Institute panel last year. As part of the plan, another one or two floors could be added to the top of the building and a second tenant would occupy roughly half of the available space, helping cover the remaining costs of renovating the building.

Money was also included in the capital budget to fund the renovations of libraries in Cleveland Park, the Palisades and Woodridge. In recent years a number of libraries have been fully modernized or rebuilt, many to wide acclaim. And while reading habits are rapidly changing, D.C. Library officials say that circulation and use of libraries is higher than ever before.

As part of the city’s operating budget, Gray included funds to expand operating hours at all public libraries. Under a plan originally proposed by the D.C. Council and adopted by Gray, neighborhood libraries will be able to stay open seven days a week, and some will stay open until 9 p.m. Monday through Thursday. It was only a year-and-a-half ago that a budget crunch threatened Sunday hours at the MLK Library; neighborhood library hours saw cuts during the lean budget times that coincided with Mayor Adrian Fenty’s tenure.