This is possible based on your folder or group setup. I'll outline both here, starting with what I think would be the easiest.
1) If you have the following folder setup:
Top
Office
Building A
Building B
Home
With the above flow, you can edit existing triggers to Folder: Office (and include all subfolders = yes) under the 'Trigger Restrictions' box.
2) If you're folders are of the mixed variety:
Top
CA
Building A
Building B
Home A
TX
Building C
Building D
Home B
Then you can still move your folders around without having to delete / create new folders. It would take some effort to do this.
a. Figure out the folder structure you'd like (the key is to get the Home folders isolated from the rest of the folders)
b. Create folder level for Home folders
i. go to AP / Devices
ii. at bottom of screen, add new folder (suggest adding under parent folder Top)
b. Then use folder navigation to go to the Folder level above the Home folder (so in the example, you'd navigate to CA or TX folder)
c. At the bottom of the page at the folder list view, click the pencil next to the Home folder name
d. Then change the 'parent folder' and save (you might also change folder names at the same time to make the destinction 'Home CA' and 'Home TX')
e. Repeat B through D for rest of home folders.
An alternative might be to move all the RAP devices into a new folder (using bulk edit, move), but I believe that you might have distributed the Home RAPs into separate folders for a reason.
3) Create separate triggers per group
This would work if you have very few groups. The only thing is that the trigger list looks more crowded if you have say 5 groups -> then you have 5 Down triggers and 5 Radio Down triggers (feasible, but not as easy as the 1st method).