Yes, if you are in live mode then select the 3 dots above you sims head (like when you save) and select edit town. You can change the lot type and build whatever building you want. Also if you have enough money then you can bye the lot.
If you are talking about the PC version, the answer is no. You can't build a store but you can become a partner to any of the shops in town, and you can eventually buy them. You can't do much except you get the money that is earned there and you can rename the building but you can't go in the building or work there.
Yes you can buy the shops and restaraunts etc. in The Sims 3. You have to first become a partner with whichever firm you wish to own (To become a partner costs A LOT of simoleons so make sure first you have enough money to do so) and then once you have become a partner, the new interaction with this place will show "Buy....." Which also costs a lot of simoleons. Once you have bought a firm, you are able to change its name and fire sims who work there. I hope this helped!
You can not build boats in the sims 3
sims 3 you can get at Eb games
well you have to buy it on The Sims 3 store OR you can find them with the sims 3 ambitions because it comes with it.
Download them from the Sims 3 Exchange. OR Buy them from the Sims 3 Store.
You don't build ceilings.
You can buy Sims 3 at any video game store or electronics store.
Technically No, You can get it as a Sims 3 Store Package or As a box in a store.
Yes, you can build your house in The Sims 3. However, building a house in The Sims 3 requires a certain amount of skill, especially for houses with multiple floors.
The Sims 3 is for sale on Electronic Arts Store and your local electronic goods/video game store.
The grocery store.
Unfortunately, you can't actually build stairs/upstairs for the sims on ps2 :'( get the sims 3 or the sims 2 (computer version(s)) to do this. Both work on pc, but only sims 3 works on mac :)
all sims 3 expansion, stuff, booster and store packs