hi - I moved my original WBC hive early this year. I removed all the lifts and roof, and used a couple of hive straps to secure the brood-and-a-half chambers to the floor. I used gaffer tape liberally to seal the entrance, and also stuck it round the joins between the boxes, as well as the crown board, to avoid any chance of escapees.
I had made the dumb mistake of installing my original nucleus colony into a WBC which was already set up in the back garden, and which like yours is approached through the house; but what I hadn't checked was to make sure the base would fit through the doorways and go round the corners in the house in a horizontal position when I wanted to get it out - so make sure yours will fit before moving, the legs are quite wide. In the end I got mine out though the neighbour's garden.
I got a beekeeping friend to help, I would have found it hard on my own.
Don't forget to ensure the frames are aligned with the direction of travel if you're taking them in a car, this minimises the tendency of them to slap against eachother which at the very least will annoy the bees (apologies if you're already aware of this).
I assume you've worked out how they will get on in the garden, flight lines, potential neighbour problems, how you will tend the garden while they are busy during the season. My back garden is fairly small, but I was able to position the hive so they didn't stop my wife from hanging out washing etc, and with fencing and shrubs to elevate their flight lnes so the neighbours weren't annoyed, although I did get a couple of stings while cutting the grass. After one season I found a site on a nearby farm and decided to move them. I miss having them at home, so enjoyable just to sit and watch, but they do limit use of a small garden.
Best of luck! kind regards Andy