In general, it depends on your location.
In the northern hemisphere, the south side gets the bulk of the sun, because the sun is in that half of the sky.
But if you are on a hill, or have a hill to the east or west, it can significantly shorten your solar 'day'.
Additionally, if you are in an area that tends to get morning fog, east-facing will get less effective sun than west-facing, because by afternoon the sun will have burned off the fog.
Finally, elevation matters.
Higher floors will get more sun because they "see" more of the sky.
So in general, the south-west of the house will get the most sun, with upper floors receiving more than lower floors.
gardening.stackexchange.com/users/32/Alex Feinman
A good (and kind of fun) way to answer this is with Google Earth .
If you look up your address, then click the Sun icon, it will allow you to see the sun light based on season and time of day.
gardening.stackexchange.com/users/35/Keith
This question depends on context.
I could say the north side but for all I know the north side of your house has no windows.
It also depends on geographic location.
Where does the sun rise/set.
Do you have any trees/objects near your house that would obstruct light?
There are varying factors here to say the least.
gardening.stackexchange.com/users/31/Chris
I believe that in the northern hemisphere, it's always the south-facing side, and north-facing in the southern hemisphere.
Wikipedia's article on Seasons has a few nice images showing this.
gardening.stackexchange.com/users/11/Emrikol
The sun rises in the east, swings south throughout the day, to set in the west.
Depending on season, "east" may be slightly ESE in deep winter to E in mid summer to ENE in late fall (northern hemisphere).
Of course it's the earth, not the sun, that is moving.
Which side of your house gets the most sun is dependent on local geography and site layout (in a valley, on wide open plain, large shade trees, high on a hill) but the earth's rotation and season of year is constant.
Simple explanation here: Learn the scientific reason behind Earth's seasons.
gardening.stackexchange.com/users/3431/GDD
Which side of a house will get the most sunlight?  Articles on the internet seem to have conflicting answers. Is this because it is dependent on location?
Which side of a house will get the most sunlight?
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<houseplants><sunlight>
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gardening.stackexchange.com/users/9/Alex B
In depends on your location. In the northern hemisphere, the southern side of the house gets the most sun. Areas that get fog will get less sun in the morning. In general, it depends on your location. The sun rises in the east, swings south throughout the day, to set in the west. I believe that in the northern hemisphere, it's always the south-facing side, and north-facing in the southern hemisphere.  Additionally, if you are in an area that tends to get morning fog, east-facing will get less sun than west-facing, because by afternoon the sun will have burned off the fog.  So in general, the south-west of the house will get the most sun, with upper floors receiving more than lower floors. If you look up your address, then click the Sun icon, it will allow you to see the sun light based on season and time of day.
In general, it depends on your location. The sun rises in the east, swings south throughout the day, to set in the west. I believe that in the northern hemisphere, it's always the south-facing side, and north-facing in the southern hemisphere.   Additionally, if you are in an area that tends to get morning fog, east-facing will get less sun than west-facing, because by afternoon the sun will have burned off the fog.  So in general, the south-west of the house will get the most sun, with upper floors receiving more than lower floors. If you look up your address, then click the Sun icon, it will allow you to see the sun light based on season and time of day.