Adding a room to house

[bhoch]

With the architect tool why can't I add a room on to an existing house? I can build adjacent to a house but am unable to connect the two. What am I doing wrong with this?

[Ryuchan]

I'm not the person to answer this, because I've only done it once so far, but when I used "mostly only a garden" (or whatever that is called) I managed to attach the tiny existing house to the large one I was building. I think it was fiddly though.

[MizMeow1]

I've not tried it yet, but from my understanding, not all houses allow you to add to them. In the shop, each house has a little icon in the upper left corner that will allow you to use the architect tool on. The problem might be that you have one of the houses where you cannot add on to it. If that's not the case, I'm not sure what the issue might be. As I said, I've not tried this yet so I wouldn't know if it's a bug or if you've done something wrong. Sorry.

[Nemesys9999]

To add a room, you have to sell what's in the way on (around) the existing wall - like : windows, doors, all objects on the wall (and sometimes things that are just too close), balcony, switches, fixtures and fittings (toilets, sinks, showers, etc.), gutters , ..... and do the same for the future area of your new room (remove everything from the lawn including slabs).
When you have a clean area & wall, open the construction tools and put the first raw (of the square) under the existing wall to link it to the house.

[Bella Ciao]

I also have similar issues. The foundation is set, edges are chosen to drag but it wont merge with an existent wall, even on the open plots. There is only one highlighted arrow to move away. I see this problem with the roof. I can't drag the arrow to the very edge, It somehow reaches a limit. The youtube videos show a slightly different version. Certain arrows or highlighted areas to start the roof don't seem to be available with my game. Very frustrating.