The Chargers have agreed to lease part of a Costa Mesa office campus and are working with city officials to secure permits for practice fields at the location in anticipation of possibly relocating to Los Angeles, the Orange County Register has learned.

The Chargers confirmed they will use the site at The Hive and on 3.2 nearby acres as their headquarters and training and practices facilities should team owner Dean Spanos decide to relocate the franchise from San Diego to the Los Angeles market and play in a $2.66 billion stadium being built by Rams owner Stan Kroenke in Inglewood.

Spanos must decide by Jan. 15 whether to remain in San Diego or exercise an option to join the Rams in the Inglewood stadium, which is scheduled to open for the 2019 NFL season. If the Chargers opt to remain in San Diego the Raiders would then have the option to relocate to Los Angeles and play in the Inglewood stadium.

Spanos has said he will not make a decision until after the Chargers’ final game Jan. 1 against Kansas City. But the lease deal and pursuit of permits in Costa Mesa are a further indication of the direction many NFL officials expect Spanos to be leaning.