Realty Development Associates will host a free seminar Tuesday, October 23rd, from 6:30 to 8:30 p.m., on Why Build Modular. The informational hour and a half presentation will take place on site at Realty Development Associates' open house/modular mode at 1 Bluff Rd. (off Rte. 6A). Attendees will have the chance to enter a raffle for a pair of Patriots tickets. There is no charge to attend the event, but space is limited.