A Lincoln Park home goes up for auction next month with a suggested opening bid of $1.25 million. The house is a 3,600-square-foot brick home built in 1876 on Dayton Street. The same firm will auction a five-bedroom home in Peterson Park. That house, on slightly more than a quarter-acre, has a suggested opening bid of $625,000. The auction is scheduled for June 23 to June 25, although because it’s an online event, bidders are required to make their offers by June 18, said Diana Peterson, president of Auction Works, a partnership launched in December between her and Sperry Van Ness International Corp. Thefirm’s site has instructions on how to bid.