It’s been a tenants’ market for Class A office space since the recession but the market is starting to tighten up, according to a report on national law firm office space from real estate brokerage Jones Lang LaSalle.

Rents are going up and landlord concessions are diminishing as the Class A market favored by law firms slowly absorbs excess capacity, a trend that will continue into 2014 and 2015, the report says.