Cornerstone Design Architects, a Lancaster, PA, architectural firm is led by Dale R. Yoder, AIA, President. Cornerstone Design can help you to achieve your vision for a beautiful, highly functional facility. For over a decade, our dedicated team of architects and designers has delighted clients from churches, religious worship centers, private schools, colleges, healthcare, medical facilities, senior care retirement communities, theaters, auditoriums, offices, corporate headquarters, recreational and retail centers, multiple residential housing communities and even adaptive reuse facilities.