The assembly, part of the Greater London Authority, is campaigning for the Government to introduce economic initiatives to encourage consumers, construction companies and other businesses to use micro-wind turbines, solar panels and recyclable water systems.
The London Assembly is also asking the Government, councils, developers, renewable energy companies, renewable energy trade associations and power suppliers to create a 'one-stop shop' to advise on the systems and promote alternatives.
The move follows a report released last week that showed a fifth of Londoners would install home energy saving systems if they were cheaper and if they knew where to buy and how to install them.
'Householders produce half of London's CO2 emissions, which is a shocking statistic. Climate change is already here and action must be taken before it's too late,' said assembly environment committee chairman Darren Johnson.
The committee is asking for incentives such as council tax breaks to reward householders and businesses installing renewable systems and training plumbers and electricians in the installation skills needed.
In a report released last week, the assembly published a map of a house showing the types of energy saving systems that could be used, with details on how much could be saved on bills.
Local planning laws, which affect the installation of renewable energy systems, also need further explanation, according to the assembly.