According to the OC Register (quoting city officials) the estimated cost of renovating and upgrading city-owned Angel Stadium could be between $120-$150 (obviously depending on the extent and particulars of the renovations):

The city and Angels officials are determining the long-term needs of the 47-year-old stadium. A draft report shows that renovations would cost between $120 million and $150 million for fixes, ranging from a new electrical system to seats.

The report is expected to be completed in several months or perhaps a year, said Tom Morton, the city’s executive director for the Anaheim Convention Center, sports and entertainment.

The report is examining the architectural, structural, mechanical and electrical needs of the stadium, Morton said. Specific items include heating, cooling, floor tiles, escalators, elevators and seats.

The city and the Angels are splitting the $135,000 cost of the report.

The Angels are expected to stay in town. But the proposed renovations will likely be part of negotiations on the Angel Stadium lease; the baseball team can terminate the current one, which expires in 2029, as early as 2016.

The City Council recently began discussions about the lease in closed-session meetings. Because the report is still a draft, the city declined to release it.

Councilwoman Kris Murray said the city and the Angels could form a “private-public partnership” to pay for renovations. She said the city lacks funds to cover the full cost.

“It’s a city asset that we have responsibility for, and that will be part of the discussion,” Murray said. “We are working through how we make that work, both for the city and the organization.”

The city and the Angels have shared the tab for renovations before.

As part of the current lease, approved in 1996, then-Angels owner Walt Disney Co. picked up $97 million of the cost, and the city put in $20 million. Arte Moreno, who bought the Angels in 2003, inherited the lease.

Morton said the stadium is in good shape, drawing big events including the All-Star Game in 2010 and a Kenny Chesney and Tim McGraw concert last year.

Last year, more than 3 million attendees visited the stadium for Angels games, the seventh-best total in Major League Baseball.

Angels and city officials decided about a year ago to start long-term planning that would serve as a “road map for potential future stadium needs over the next 16 to 17 years,” Morton said. Such plans are usually done every 15 years or so.

You can read the entire article behind the OCR paywall here.