does anyone know a cheat where i can place foundation on that 1 tile between the sidewalk and the open house area? because i have a slope between those 2 areas and i want to fill it in with a foundation, but it wont let me

Soory, but I don't think that's possible at the moment. Because a foundation is considered a type of wall (with a floor on top), and walls can't be placed that close to a side walk, I don't think it's possible, even with cheats.

Maybe someday.....

With cheats like the "moveobjects" cheat can enable building not only on that row of grids but also even on the road. Yet, there's still no known way to properly build on the last 2 grid rows of a lot (including the road). Yet, diagonal walls can be built on the last 2nd grid row.

i found out how, it may take you some trys to get it cause i just discovered. but if you have a basement 1 tile behind the sidewalk then turn on moveobjects on and boolProp constrainFloorElevation false. now level the edge of the sidewalk so that the sidewalk is on a slope, then place the wall where you want to connect. level the wall to match the deck height if you can, then plce tiles between deck and wall, then level them to match deck if you have to, thats as far as ive gotten, but my tiles still slope because of ground below it

do you have a pic? I would love to see that.
xo