Do you always make basements in your houses?

I went through a brief basement phase a few years ago but at the time I was just modifying existing builds. It's harder to put a basement in someones else's build than it is to do it when you're building from scratch. I think that's why I kind of got over the urge and I haven't really thought about them very much until I saw this thread. It's something I might try again, in the right circumstances now that I'm doing so many of my own builds.

I never made a basement, and I actually remove all the stuff that is in the basement (including the stairs) if I download a lot from an other player, because I hate losing my sim. Call me weird, but I only play on single story lots.

I have a large single story lot with a basement. I use it mainly for collections and large objects. The florist bench, workbench, candle making station, fabricator, cupcake machine, etc.

For a while I was adding basements and/or attics too all my houses, but that stopped after I figured out I could just drag the more rarely used junk up into the roof.

I have one build with a basement... They could be handy at times but I really don't like to play with them - it's so dark down there ?

I don't always make basements, actually, with my played households, I only have three houses that have basements.

And what stuff goes into them? Well...
One basement has: A bar, gym equipment, a piano, a microscope, an easel and the video game motion mat thing, Oh! Almost forgot the bed where the ghost sleeps!

The second basement has: a couch and television and radio; a bathroom, a computer and desk, bookcases, video game motion mat thing, card game table. Also has a child activity table. Guitar.

And the third basement: there's a bathroom, and a room that has gym equipment, there are bookcases, sofas, two computers, a video game motion mat thing, a card game table, a chess table, criminal career reward objects, and stolen things on display, and paintings that one the sims that live there painted.

Really depends on the world and what lot I'm building or renovating. It can also be a pain adding a basement to an already existing building. I'm more likely to build a fake garage that's used for things that don't fit anywhere else.

I like to use basements for laundry, skill building, collections, underground greenhouse, or secrets. >:)

My Underground Bunker has a basement and my Doctor Who's TARDIS home has 2 basements. ;)

I have made underground homes but those are nicely furnished, comfortable basements.

Sometimes I make basements (or attics) to store collectibles or photographs.

I have some basements but not all houses get basements as a rule, depends on the house and the story I want to tell. The church building has a large crypt network in the basement, the castle has a dungeon and butler's quarters, a large uni house has a walkout basement with modern kitchen, laundry, bathroom, spare room, etc. The basement clutter kit is only useful for the aged and broken aesthetic, not sure I would build a basement just to display those items there.