Planets in houses · Kendra
Surya in the 4th house
Sun · Sukha Bhava
Surya is the karaka (significator) of soul, father, authority and vitality. The 4th house, called Sukha Bhava, shows home, mother and happiness. When Surya sits here, these matters take on its colour.
In the 4th house a malefic can disturb peace at home or with property, and asks one to build inner calm.
The 4th house is a kendra (angular house), a pillar of the chart, so a graha here shows its results openly and strongly.
The 4th house is opposite to where Surya gets directional strength, so it loses some power here.
Surya gives its best results here when it is exalted in Mesha, in its own sign (Simha) or in a friendly sign, and when it is not combust.
Results are weaker if the Sun is debilitated in Tula or afflicted by Saturn or Rahu.
In transit (gochar)
When Surya transits the 4th house counted from your Moon sign, the period traditionally needs more care.
A single placement is never read alone: sign, aspects, conjunctions, dasha and the whole chart change the outcome.