Liberal Democrats want a fair deal for tenants and more access to affordable homes.
Southfields campaigner Duncan Lyons has written to Wandsworth Council urging them to take part in London's new Rogue Landlord database.
"The Liberal Democrats put forward the idea in 2016. We had campaigned for landlords to be registered so the council can check on standards. We also want tenants to be given more help to buy their own home,' says Duncan.
"It is so important that people able to settle into a decent, affordable home."