Mark Loeb in Illinois

Mark Loeb's footprint in Illinois centers on a single, well-established subdivision: River Glen in Libertyville. With zero active listings and no new construction currently tracked, this is not a builder actively releasing new inventory in the market today — this page functions as a resale guide to a Mark Loeb-built neighborhood rather than a current price sheet. River Glen's floor plans, including the Brook, Glade, Trillium, Tussock, and Vale models, reflect the builder's design work from when the community was originally developed, and homes here now transact based on resale market conditions rather than builder pricing. Buyers considering River Glen should approach it the way they would any established subdivision: expect mature trees and landscaping, a settled streetscape, and no ongoing new-construction HOA assessments tied to active development phases. Because inventory turns over based on individual homeowners rather than a builder's release schedule, availability can be limited and home condition will vary by age and upkeep, so a closer look at each listing's history is worthwhile. For buyers specifically drawn to Libertyville and interested in one of its recognizable Mark Loeb-built pockets, River Glen remains the reference point in this market, even though the builder itself is not shown actively building here today.