I am building an RV-14 (taildragger) in my unfinished basement with a walk-out French door. I delayed posting this because I didn't want to jinx myself. Tonight, we successfully removed the fuselage from the basement. The engine is mounted and the landing gear is on the plane. It would have been easier to do this before putting the landing gear on, but we succeeded.
We rolled the plane at a steep angle to the door to get one wheel out, then put both wheels on furniture dollies and slid it sideways. The idea was to be able to turn the fuselage so the second wheel rolled out and then the plane would roll straight forward. That would have worked if the landing gear axles didn't stick out to hold the wheel pants. With the protruding axles, we were basically 1" wider than the roll-slide-turn plan allowed. So we lifted the wheels off the ground with an engine crane and tipped it sideways just enough to allow that last inch of axle through the door.
Obviously, we removed the horizontal stabilizer to fit through the door, and that necessitated removing the elevators, rudder, and vertical stabilizer. I plan to leave those off of the plane until it makes the move to the airport. Narrower is better for going down the road, even on the short 2-mile jaunt I am facing.
I don't think this method would work with an RV-14A., although for all I know it would work better. I would recommend moving out of the basement after putting on the engine mount but before attaching the landing gear, as long as you have a good place to work on the other stuff like the cowling, firewall forward wiring/plumbing, and so on, and a good way to transport it between the two places without being on its own wheels.