About Onyx Masonry

Founded in 2010, Onyx Masonry started as a small crew repairing brickwork on Rittenhouse Square rowhouses. Today, we're a 20+ team tackling everything from frost-damaged foundations to custom stonework in Northern Liberties.

We don't cut corners—just stone and brick. Every project gets our full attention, whether it's matching 19th-century mortar or reinforcing a Fishtown patio against Nor'easters.

When we're not on site, you'll find us at local trade schools mentoring apprentices or volunteering with historic preservation groups. Philadelphia's architecture deserves caretakers who understand its quirks.