The UK cannot reach net zero unless it stops using gas for heat.
The government’s climate advisors said much more investment is needed in energy efficiency and low carbon heat.
The CCC also said the policies needed to drive improvements in energy efficiency in homes that are not fuel poor are “inadequate”.
It also noted that there are gaps around policies for energy efficiency in small commercial buildings.
A BEIS spokesperson told future Net Zero: “Improving the energy efficiency of our homes is the best long-term method to keep household energy costs down and tackle fuel poverty. This is why we have committed £6.6 billion to improve the energy efficiency.”