All new homes in Wales will only be heated and powered by clean energy under new Welsh Government plans.
Housing accounts for 9% of all greenhouse gas emissions in Wales.
However, houses built after 2025 will be more energy-efficient, cheaper to run and produce up to 80% less CO2 emissions, under the proposals.
Wales' largest housing association, Pobl Group, said the targets were "challenging but much needed" to address climate change.
Housing contributes "significantly" to the problem, according to the Welsh Government.
It said, "substantial change" was needed for buildings to operate close to zero emissions by 2050.
However, it said residents could also save as much as £180 a year on bills under the proposed new standards to be implemented in Wales over the next five years.
They include:
Improved energy efficiency from 2020 to cut carbon dioxide emissions from new dwellings by 37%
Phasing out the use of high-carbon fossil fuels
Improving energy efficiency by limiting heat loss and reducing the demand for heat
Improving air quality
Housing Minister Julie James said reducing the carbon and energy impact of new homes must be cost-effective, affordable and practical.
"To meet our target of reducing our greenhouse gas emissions by 95% by 2050, we need to take action now to make a significant step-change to the way we heat and power our homes," she added.
"The new homes being built today will exist in 2050. Therefore, we must ensure the standards we set for these homes put us on the right path.
"These measures will not only tackle climate change but keep down household energy costs, helping people with the cost of living."
Continue reading here: - https://www.bbc.co.uk/news/uk-wales-51151032
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