There are two possible ways of supporting the two corners of the balcony adjacent to the building.
How to build a balcony without roof blocking sims 3.
Thread same sized dowels through the top and bottom of each net segment.
Place the roof as you want it then remove the walls.
You can install a conventional deck ledger that is attached to the building or you can support the corners on posts that bear on footings like a freestanding deck.
Go into edit town mode while playing the game.
Open the console again and type restrictbuildbuyinbuildings false.
Cut three segments of netting long enough to hang to the floor and wide enough to extend to both ends of each side of the balcony.
Screw in eye hooks at the top and bottom of your balcony then insert the dowels in the hooks.
Select the building of your choice evict the sims then click on build buy.
Remove the lower walls and add columns.
Add a 1 x 1 octagon roof over the middle section of the frieze.
Open the console hold down ctrl shift c on your keyboard and type testingcheatsenabled on then hit enter.
Adjust the height on both pieces to your liking.
Open the console and type restrictbuildbuyinbuildings false and then hit enter.
Open the console hold down ctrl shift c on your keyboard and type testingcheatsenabled on then hit enter.
Buy six dowels two for each side of your balcony.
Its a pain has no design sense at all and generally just looks lousy.
It has a lovely balcony.
Select the building of your choice evict the sims and then click on build buy.
Choose the building which you d like to build your rooftop garden.