In 1260, a Cistercian nunnery was founded in Ebersdorf bei Coburg by Henry II von Sonneberg with the help from the nuns from Maidbronn.

The Thirty Years' War destroyed most of the houses and buildings in Sonnefeld and Hofstädten so the reconstruction was slow but steady.

In the same year, a war memorial was unveiled in the town square (Marktplatz), and the first railway line opened at Sonnefeld in 1901.

Blazon: Per fess azure and argent (divided horizontally in blue and white, with the top in blue), in chief a church argent roofed gules (with a profile of a white church with red roofs) and in base an oak tree erased proper.

They were joined by industrial jobs in nearby towns and villages in the post-World War II boom.

The prosperity made it possible for Sonnefeld to add a water supply system, a fully biological sewage treatment plant, an elementary school with a gym, and a heated swimming pool.