S. Harris Ltd. specializes in the diagnostics of and intervention in the problems associated with aging buildings. Many of our clients are custodians of historically significant properties; some of the buildings are simply old; some are young buildings but with problems. We are architects, engineers, and preservation specialists with a practice concentrated primarily in the Mid-Atlantic Region but with clients in Nevis, St. Croix, Bermuda, Puerto Rico, Mississippi, South Carolina, Indiana, Ohio, and Nebraska.