Starting 1.17 from theme options you control if you wish the lists for agents, properties or blog posts to be on 3 columns or 4 columns.

list-desogn

From the same area you set the minim height for the card (agent card, property card or blog card):

card-height

Card height is useful when you create your own property unit and you wish add more or less elements than in default template = http://help.wpresidence.net/2016/09/08/property-unit-design-settings-beta-version/

card-height-front

From the same settings you control the internal padding of the card.

paddings

padding

You control the card unit background color:

background-color

back-color-front

You also control the card exterior border size and color:

border-color

border