Mine weren’t stolen from home – perhaps partly because of the large Akita (soon to be two large Akitas) roaming :).
I presume you can’t store it inside?
Whatever you do, it’s worth looking at the cheap wireless alarms available. The main unit goes inside and you can put battery powered sensors in an out building etc. Also then used to alert you to the house being broken in to at night. As they have car-style fobs, it’s no hassle to arm and disarm them.
These probably won’t stop a thief, but should alert you, presuming you’re at home at the time.
Maybe incorporate a ground anchor you can lock the bike to in shed building
If you want it to be reasonably secure, you’re going to need to make it out of brick/breeze block etc, then add a decent metal gate (might get away with a wooden gate with a metal grille on the front, making sure you’ve got a decent lock locking the gate.
I’m actually soon to be building a bike shelter for my place, but it’ll only house cheap bikes; probably have a ground anchor too and as mentioned, the dog does a decent job of keeping people out (despite the fact she’s fine when I’m there, still see people crossing the street when I’m out walking her!)