The Piedmont School is accredited by the Southern Association of Independent Schools (SAIS) and the Southern Association of Colleges and Schools (SACS).

After meeting rigorous quality standards and a peer evaluation by outside professionals, The Piedmont School's  accreditation was renewed in October 2011. 

Established in 1895, SACS is a non-governmental, voluntary organization that accredits more than 13,000 public and non-public institutions from early-childhood to university. Today, SACS is the largest accrediting agency in the world. Accreditation is voluntary and must be renewed each year.

A school that achieves dual accreditation demonstrates its effectiveness and ability to provide successful schooling for children. The hallmarks of an accredited school include commitments to:

* A set of rigorous, research-based standards;
* A program of continuous school improvement;
* A quality assurance process that involves stakeholders in self-evaluation, and
* A peer review every five years.

The Piedmont School is a member of the following organizations:

North Carolina Association of Independent Schools http://www.ncais.org
Southern Association of Independent School http://www.sais.org
Southern Association of Colleges and Schools http://www.sacs.org
Triad Association of Non-Public Schools http://www.tanps.org
North Carolina International Dyslexic Association http://www.nc-ida.org
Learning Disabilities Association of North Carolina http://www.ldanc.org