One of the biggest demonstration is happening in the capital, Madrid. Estimates of the number of participants varied widely, with the city’s Tenants’ Union putting it at 500,000, while government officials put the figure at 70,000.
Demonstrators have been camping in one of the city’s main squares, Puerta del Sol, for days.
One protester, David, told RTVE ahead of the protest: “We’re not here for pleasure or comfort. We’re here out of conviction.”
Another protester, 26-year-old librarian Marcos Sainz, told AFP news agency that he used to share a two-bedroom flat with friends, paying 900 euros (£766) a month in rent. Today, he said a one-bedroom flat often costs 1,000 euros.
Sainz said he would protest against rent rises “until someone dares to regulate it all”, or “we’ll all have to leave Madrid”.
On Friday night, Madrid’s Tenants’ Union said that although the government’s proposed measures were insufficient, the rejection of the proposed legislation “exacerbates the housing crisis which is costing the working class their lives”.
It is calling for a general strike over the housing crisis.
