A design guide is also being launched to support design teams using the pattern book to design developments that complement the local area and context.

The pattern book promotes the use of natural materials, including Welsh timber.

The homes are also designed to meet Welsh Development Quality Requirements and Housing Quality Standards.

The pattern book and design guide will be officially unveiled on January 15th at an event at the University of Wales Trinity Saint David, Swansea campus.

Ahead of the launch, Wales' cabinet secretary for housing and local government, Jayne Bryant, visited Celtic Offsite in Caerphilly, a social enterprise within the United Welsh Group that manufactures timber homes.

She said: “Tai ar y Cyd represents a significant step forward in our commitment to building sustainable and affordable homes here in Wales.

“We know that there is a real need for good quality and energy-efficient homes across our communities, and this innovative pattern book gives developers the tools they need to build homes more quickly and deliver against our target of building 20,000 affordable low-carbon homes by the end of this Senedd term.”

United Welsh chief executive Richard Mann said: “The standardised housing designs from Tai ar y Cyd will enable us to be more efficient in our manufacturing processes to build more homes faster for housing associations and local authority partners.

“We look forward to using the designs to build more much-needed homes for people to enjoy across Wales.”