Most of the schemes are now complete, or due to be finished early in the new year.
Cllr Ernest Gibson, Lead Member with responsibility for climate change, said: "Increasing our capacity to generate renewable energy and low carbon heat, as well as making our buildings and facilities more efficient, helps us move towards our goal of a cleaner, greener future.
"This funding has allowed us to deliver a whole range of carbon-cutting projects across the borough, which will make a significant contribution in our drive to carbon neutrality by 2030.
"We're absolutely committed to reducing our carbon footprint and have already made great progress, but we will continue to use every opportunity such as external funding sources like this to help us achieve our ambitious targets and deliver on our key priority of investing in the natural and built environment."
Projects to benefit from the funding were identified following detailed analysis council buildings in relation to carbon emissions.
One of the schemes which has undergone improvements is Jarrow Pool, which has had its roof replaced, incorporating the installation of solar panels which will power new energy efficient heat pumps being fitted in place of the carbon intensive boiler system. The measures are expected to save at least 89 tonnes of CO2 per year.
The Department for Business, Energy and Industrial Strategy (BEIS) launched the £1billion Public Sector Decarbonisation Scheme in September 2020 to support the delivery of green investment initiatives and stimulate the economy, delivering significant carbon and financial savings in the public sector.
"While the public sector has already reduced its emissions by 40% since 1990, we know there's more to be done and through an additional £1.4 billion in government funding over the next three years we will support more projects like this one in South Tyneside as we build back greener."