MARK A COSTLOW (specialty-contractor) in JOHNSTOWN, PA specializes in residential and commercial construction, including roofing, flooring, and structural repairs. We are committed to delivering high-quality workmanship and timely project completion.
Operator computes a Health score every night at 2 am HST. It is the one number that tells you if this shop is winning, losing, or steady. Here is how MARK A COSTLOW broke down on Apr 25, 2026.
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