Maria Salom is the senator who owns the most properties, with 10 properties and 20 parking spaces.
This is stated in the declarations of assets and income that the senators present when collecting the minutes.

PalmThe 264 members of parliament who make up the Senate have a combined real estate holdings of 540 homes, as 57% of senators declare more than one home. The leader with the most is Majorcan Maria Salom (PP), with ten properties, eight commercial premises, and twenty parking spaces in Mallorca.
This is stated in the asset and income declarations submitted by senators when taking office, which they can modify throughout the term and which have been compiled by Europa Press.
According to this data, the 264 current senators have declared a total of 539 properties in the Upper House, including flats, apartments, and single-family homes. The members of parliament also specify in their declarations the percentage they own of the property and the title deed, as it can be through inheritance or sale.
Of these 264 senators, up to 151 have more than one declared residence, which means that 57.19% of parliamentarians have two or more homes, although the percentage varies depending on the parliamentary group.