Merthyr Tydfil Development Plan 2006-2021, concentrates on the design of new buildings within Merthyr Tydfil and how they can be made to be sustainable within their environment, for example ensuring buildings are built in an orientation that would ensure they gained the full benefit of passive solar energy.
Another aspect of environmental sustainability which is being focused on within Merthyr Tydfil is the biodiversity of plants and animals within the environment.