Lapp Masonry is a leading commercial and residential masonry and concrete contractor serving Pennsylvania, Maryland, and Delaware. A Tradition of Craftsmanship, Timeliness, and Safety. J. Lapp Masonry, LLC was founded nearly 20 years ago by a young mason who had just begun to learn the trade. It all began withthat first project; renovation of anold hotel withnatural stone walls. What began with a young mason, rented and borrowed equipment, and long days turned into a successful project.That hotel is still around today and those natural stone walls look beautiful. Just don't ask us how many times those walls had to be built. Nowadays, we get it right the first time. We've also grown a bit since then.