The online auction for the historic federal courthouse in Des Moines has been extended to April 30 with a second open house and tour of the building scheduled for April 22, the U.S. General Services Administration announced Thursday.

The auction began on March 3 with a starting bid of $60,000. It wasn’t immediately known how many, if any, bids have been received as of Thursday and a spokesperson for the GSA, which manages the government’s properties, including their sale, referred questions to the update that was sent by email.

The agency regularly holds online and other auctions to sell excess property. The building at 123 E. Walnut St. was constructed between 1927 and 1929 and is considered to be excess property.

The emailed update indicated that an open house and tour were previously held on Wednesday. Details of the second open house were not included in the update. The deadline for submitting a bid is 5 p.m. on April 30. A previous announcement of the auction said it would end on April 21.

The U.S. District Court for the Southern District of Iowa occupies the more than 97,000-square-foot courthouse and had leased space in a privately owned building at 110 E. Court Ave. That lease expired a year ago.

Several of the federal judicial divisions that had been located in the office building have been relocated to the new federal courthouse at 111 Locust St., Chandlor Collins, the southern district’s clerk of court, said in February.

Among the divisions now in the new building are the bankruptcy court, probation services and 8th Circuit Court of Appeals.

Construction is continuing in the new courthouse, and offices in the historic courthouse will likely be relocated in mid- to late spring, Collins said.

The courthouse is on the National Register of Historic Places, and is one of seven public buildings constructed along the Des Moines River in the early 1900s.

The GSA is advertising it as a mixed-use building with easy access to major roads and highways, and within easy walking distance to downtown amenities, including restaurants, retail shops, the Des Moines Civic Center and the Pappajohn Sculpture Park. It is also close to downtown hotels and parking garages, an ad contained in the update stated.