So what are we actually renovating?

Basically, the east wall of our kitchen-dining-living area has to come down and be rebuilt, this time actually on our property line.

Since it is impossible to rebuild a wall without removing the roof, and since the present roof is a hotch-potch of mis-matched pieces with an ugly internal beam separating them, we will not only replace it, but remodel it. The new roof will be two gables, with a hip where the room narrows. The ceiling will follow the roof line, making the room look much more interesting. We will also put new, east-facing skylights on that side of the gable roof, and a south-facing triangular window in the new end gable in the kitchen, where it projects above the skillion roof over the mid-section of the house. The walls will be very slightly higher before the ceiling starts, and the new gable will project beyond the end of the house to shade the windows, replacing the current rather grotty pergola.
We will replace all the existing windows with aluminium-framed, double-glazed windows. Those looking into the side light well area will no longer be floor-to-ceiling, but will have a small area of solid wall above and below. There will be big sliding doors at the back, but a door facing into the light well at the north end of the west wall so that we don't have to open sliding doors all the time just to go in and out, and to give us ventilation with a fly screen that is less visible than our present one. The gable above the back sliding doors will be glazed.
The kitchen will stay more-or-less as is, but with a new sink, new benchtops over new cupboard units with all those nice new-fangled things like self-closing drawers. Stove (very old but dearly loved), fridge and dishwasher (new) stay.
So all we have to do now before the project starts is move the fridge into the middle room so we can still keep some food in the house, pack up every item in the kitchen and in the various cabinets in the dining and lounge areas, then find somewhere to store all the boxes, the dining suite, the lounge suite, the assorted occasional tables, bookshelves and cabinets in the lounge room, not to mention removing all the paintings from the walls...
Plan is to move the BMW out of the garage and up to Romsey, then move furniture and contents into the garage. Don't know yet when D-day is, but if it is early June as planned, then we're going to be very busy for the next couple of weeks.