J. Callahan Concrete handles the flatwork and exterior site work a lot of Upstate builders would rather hand off: driveways, patios, sidewalks, pool decks, retaining walls, and foundations, from a single back-porch pad up to commercial slabs poured with footers. Jacob and Kimberly Callahan started the company in Simpsonville in 2019 and have kept it a family operation rather than a franchise, with Jacob bringing a Marine veteran's background to how the crews run a job.
The work spans residential and commercial, covering new pours, extensions, and replacements, and estimates are free before anything gets poured. Reviewers tend to single out crews that arrive on time and walk through the estimate in person, and the company took a 2025 Best of South Carolina regional award in its category.