Oneill Plumbing & Heating are experts in a full range of plumbing and heating projects utilizing quality craftsmanship, trustworthy professionals, superior hardware, and competitive rates are what makes us the best choice for all your plumbing and heating needs. O'Neill Plumbing and Heating, Inc. is a family owned small business established in 1994 in Northern Baltimore. Our mission has always been simple: to provide high-quality services for our valued clients. Our trusted team goes above and beyond to cater to each project's specific needs.