According to the English Housing Survey, an accessible home is one that makes is visitable for all people including wheelchair users. Of the 24 million homes in England less than 9% meet all 4 criteria of:
Level access to main entrance
A flush threshold at the main door (less than 15mm)
Sufficiently wide doorways
A toilet at entrance level
Around 2.3 million homes have at least one adaption for a person with a disability, the main item being grab rails in 1.8 million homes.