Week 12 brought little progress. The hold-up was now the steel beams: apparently the producer forgot to galvanize them. Happily, they finally arrived the following week:

The ground floor rear wall was gone (eventually, the upper floor rear wall will be rebuilt also):

By Saturday, the remaining beams were in place and the side wall, where the extension will be built, was finally gone!

The kitchen feels a bit roomier now.

The new layout offers convenient access to the upstairs toilet:

Here is the view from upstairs, down into the kitchen:

And a bit of the upstairs side wall, above the new beam: