Despite closing its Fifth Avenue store last month, Tommy Hilfiger has expanded its headquarters at 285 Madison Ave. to roughly 220,000 square feet.

The fashion firm added the balance of the 10th floor, representing 14,054 square feet more to its lease, so it will now occupy the full second and third floors plus the entire sixth through 12th floors.

Matthew Astrachan, Mitchell Konsker and Steven Bauer of JLL represented Hilfiger’s parent company, PVH Corp., in the lease, which had an asking rent of $78 per square foot.

The RFR ownership also signed the global financial tech company Quantitative Brokers to 7,070 square feet on part of the 17th floor, which had an asking rent of $82 per square foot. Seiler of JLL represented this tenant.

Konsker, Alexander Chudnoff, Dan Turkewitz and Diana Biasotti of JLL represented the RFR ownership in both deals along with AJ Camhi and Ryan Silverman in-house.

After a $65 million renovation, just a tower floor of 14,875 square feet and a 6,761-square-foot prebuilt remain to be leased.

Kenneth Horn of Alchemy Properties is advising Macy’s on its complicated transformation, which is expected to include the addition of a 1.2-million-square-foot office tower on top.

Plans that The Post’s Lisa Fickenscher and I first wrote about in 2016 are beginning to jell.

Developing such a tower is complicated because it would include piercing the current structure with large steel pilings to support a new 800-foot-tall structure, all while the department store continues to operate. The city would also have to approve the addition through zoning changes.

Horn declined to comment on his involvement, which would not include him as the developer at this point.