The properties are being built for Sedgemoor District Council and developer Brookvale Homes, with funding support from the Homes & Communities Agency (HCA).
The energy-efficient homes will achieve Code for Sustainable Homes Level 3.
Other Raglan affordable housing developments currently under construction in Somerset include new schemes in Chard, Sparkford, Baltonsborough, West Coker, Yeovil and Monkton Heathfield.
Got a story? Email news@theconstructionindex.co.uk