A fourth bedroom and a big utility room for laundry and storage.
That’s WED! 
Besides, you know that you should never push the wed one!
I wish for a cedar lined closet and a central vacumn system (I live on three floors and dragging the vacunm around is getting tough).
I love my sweet little house, but I wish we had a porch in the front and/or a deck in the back. But neither are really possible. I’d also like a second bathroom. We could have looked harder and found a house with those things, but not at such a good price in such a good location. My house is pretty wonderful, though- we’re the second owners of a well-loved house built in 1955. Not only is it the perfect size for the three of us but there’s such a happy feeling here.
I’d relocate the trashy neighborsseveral houses down who have a kid with a loud scooter and yell at midnight to Mars if possible. I don’t understand why people think it’s ok to be so noisy. And when the cops come get indignant and yell out into the street what harassing assholes whoever called the cops are (not us, for the record).
We rent a lovely house from my folks who give a good deal. (Not a great deal, they aren’t FOOLS! But they do know that we’re good tenants. The SO has fixed the a/c with simple things like three times. I thought my dad would cry with joy.) It’s not a fancy house, but nice middle class type.
I want a garden tub with a bubbly option so badly. But not b/c of the old story of “you know where the women are in a swimming pool, b/c that’s where the nozzles are” type story.
Or a hot tub. I have some joint ache that it would be awesome for. Plus, lazy and would like to just sit and read.
I’m a simple simple creature.
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A dumb waiter. Would make getting the laundry from third floor master suite to basement much easier. It would be nice just moving the washer & dryer to the 2d or 3d floor, but the dumb waiter would be useful for other things as well.
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Whole house fan. Would be great for nights when we don’t want to turn on the AC, we just want to changeover the air in the house.
A fireplace! It makes sense that college-kid apartments wouldn’t want their tenants playing with fire, but I’m 23 and my roomie is 24 and we are responsible homebodies on the ground floor! It’d be cozy in the winter. The place is wonderful, though.
There’s not much I would change about my house. I wouldn’t mind having a bit of a front porch/patio, and it would be nice if my son’s room was bigger. Mostly I just wish I didn’t have so much stuff and that I was more motivated to get rid of what I do have.
The word you’re looking for here is “Son”.
Get a few of those and you’re all set. Granted they’ll eat you into the poor house but everything has it’s tradeoffs.
I’d kind of like central air so I could get rid of these ugly ass window units.
Our house is perfectly adequate for us, but a few luxury items would be:
[ul]
[li]A root cellar. We’ll be building one someday in the half-assedly half-finished basement, but I’d love to have it now.[/li][li]More light in the kitchen, which is sandwiched between the living room and the attached garage. We have to use the overhead light even in the middle of the day.[/li][li]A covered porch appropriate to the age/location of the house instead of the gigantic silly deck the previous owners added.[/li][/ul]
A guest room. I hope that problem gets solved when my dad buys a camper and we can park that outside our house when we have guests.
It would be nice if the kitchen had an outside place to sit and eat. Our bedroom downstairs has acess to the garden, but the kitchen doesn’t.
Otherwise, our home is perfect. We have our bedrooms in the finished basement, which is lovely and cool in summer. We have a very light and lovely kitchen.
We’ve done a lot of work on our house over the 8 years we’ve been here. Overall, I really like it, but whoever designed it back in 1975, could have done a few things better. If I had a magic wand, I’d get rid of the family room (it’s only used when I’m on the computer - it’s not big enough for social gatherings) and I’d distribute the square footage among the dining room, the bedrooms and the master bathroom. I’d also love a bigger, screened-in front porch, but we’ll screen in the porch we have and it’ll be plenty big for the cats when it’s mild enough to leave the doors open.
Honestly, of all the places we’ve lived over the years, this house is the best, and the aforementioned redistribution of floorspace would make it perfect.
OK, a deck with a hot tub would be fun, if I’m being totally impractical. 
Hot & Cold running concubines.
In fact, skip the cold ones.
A full perimeter fence, a pool, and a doggie door.
I wish I had the big tree in front of my living room window back. It provided shade, privacy, muted street noises, was a habitat for assorted birds and even absorbed ethnic cooking odors. Due to some lousy pruning and tree care advice all that’s left is a depressing stump.
I’d like a/c. I live in the tropics and the trade winds are fine most of the time… but when those winds go calm it just sucks.
In the apartment where my mom lives with me, I would love to have:
- Laundry either on our floor, or in our apartment
- An elevator
We live on the third floor, and she has a physical disability, so either/both of those would be really nice. 
Yeah, a nice basement. To get into ours, the entry is outside on the back porch. The basement has dirt floors, stone walls, tree trunks with bark on them as beams, and is about 5 feet tall. Totally useless.
I also wish our only bathroom wasn’t off of the kitchen. Kinda weird when we have dinner parties.
Oh and maybe heat upstairs? We live in Vermont, after all, and it gets kinda cold.
Oh well, that’s how 200 year old houses are, I guess.
After being without power during a heat wave, I’d like that my windows/house be arranged in such a way that a cross breeze would be possible. I’d like that on nice days too, but the power outage reminded me just how much I miss that
Air conditioning, and at least three fewer roommates.