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Methods

Modern methods of construction (MMC)

Modern methods of construction (MMC) is the UK umbrella term for building methods that move work from the site into a factory or use new processes on site.

Also known as MMC, modern methods of construction, MMC categories, MMC definition framework, MMC category 1, MMC category 2

The UK government’s MMC definition framework divides MMC into seven categories. Category 1 is volumetric (3D) modules, category 2 is panelized (2D) systems such as timber-frame wall panels and cassettes, and the remaining categories cover components, additive manufacturing, non-structural assemblies, product innovation and site process improvements.

The term is used in policy, funding and procurement, where housing providers are often asked to report the share of homes built with MMC. In practice it overlaps closely with offsite construction and prefabrication.

Related terms
Offsite constructionOffsite construction is building in a factory rather than on the building plot, then delivering the finished elements or modules to site. Panelized constructionPanelized construction builds a house from flat prefabricated wall, floor and roof panels that are assembled on site. Volumetric moduleA volumetric module is a complete three-dimensional section of a building, such as a room or apartment, built in a factory and transported to site as a unit.
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