Relocating a garage by mirroring

First I get an idea of the building measurements, since the garage has to be relocated from the left to the right. The garage is around 21 feet wide, and the part to its right is 29 feet.

We do not want to change the location of the sunroom — it is placed according to the sun path, so it stays.

So the garage has to be accommodated in the lower part instead. As a quick approach, we switch the position of the living room with the garage and shift the middle wall.

The wall is modelled as one continuous element, so it has to be split in several places. First the left garage wall, then the right garage wall from the top of the bathroom, and finally the right external wall from the top right of the living room.

For ease of working I delete all the room tags — filter them, then delete. They get recreated afterwards.

Now select the portion that was split from the main part, and copy it to another location rather than moving it — it is constrained to the upper portion of the plan, so a move would fight those constraints. A copy does not.

With the help of the Y axis we mirror this portion, then delete the previous one.

Place the mirrored portion into the original plan keeping the same reference point. This is important to ensure the accuracy — pick it from here and place it there.

Now extend the external wall of the garage to the sunroom, and add a wall at the upper portion of the bathroom.

Extend the middle wall to the required position and shift the storage area to the right of the garage. To do that, extend the inner wall between the living room and the bedroom out to the outermost external wall of the garage.

The storage area moves to the right so it can give access from the living room and the office to the rest of the house through this circulation area.

Extend this wall across, and delete the window between the sunroom and the new storage area. Then delete the wall from the old storage area, extend the wall up, and delete the right wall of the old storage area too.

Now split this wall for the circulation area using the Split command, and trim these walls to the left side.

Delete the extra wall associated with the laundry door — the door is deleted automatically with it — and extend the living room wall to the left wall of the laundry room.

Then expand the aligned wall of the living room out to this extremity.

Now create the room separation lines, for the living area and for the circulation area.

Add the doors to the storage room, the garage and the laundry room. All three openings face the circulation area.

The laundry room door is relocated so that it does not remain visible from the main entry.

Now reapply the room tags. The rooms were never deleted from the project, so the name comes back from the property tag under identity data — select the room name and place it.

With the tags placed, the garage is shortened for the closest match to the existing area. That means moving the lower wall of the garage five feet five inches upward, so first split this wall at the office end.

Select those elements and use Move with Disconnect, so the selection is not held by its constraints, move it five feet five inches, and trim the walls to here.

To reduce the area further, select the office, the bathroom and this area's walls and move them — this time without Disconnect. That distance is three feet.

And for the living room, move the lowermost wall by nine inches.