I'm still concerned that the covered alfresco area is located to the NE, it will block much of your winter sunshine from entering your living areas, making your home colder in winter. Personally, I'd try to locate your alfresco o the eastern side of your living areas (& somehow moving the master further SE). However, if you are going to stick with your current alfresco location, I'd recommend you change from a hipped roof alfresco, to a gable roof alfresco. If you make it an opened gable, & have a cathedral ceiling you'll end up with quite a bit more winter sunshine entering your house. Similar to the images below.

simply put - massively pushing the functional envelope in such tight/small limits. To achieve this you have to seriously limit/streamline flow/access points and maximise any wall space. So for example the only window into the kitchen really should be say a splashback window. The double access into the kitchen/living is a luxury in context - something has to give here otherwise you'll end up with something that ticks boxes but in reality is not actually very usable .......recommend you check out some Japanese & northern European work to see how this type of thing can be achieved effectively/cleverly when space is limited....possibly here you may be best to consider a living/kitchen/bedroom setup that is functionally zoned/separated with strategic furniture/joinery placement, simple kitchen at one end and bathroom the only "room" created within existing structure.......remember, depending upon existing conditions and what the ultimately outcome it can sometimes be false economy rearranging/re-using elements when you'll get a better bang for buck by popping out a little here and there to free up certain details for certain functional gains......good luck! PD

Love it as is. Well done. The void above living will let on light, just be careful of not letting in the western light too much. So some way to shade house on the backyard end. would be good.

I had a similar idea to your one oklouise , of building above the new garage , but I had a couple of alternative tweaks -- I wondered about coming 'forward' with the garage and upstairs , thereby having the upstairs front rooms closer to the street . The one slight problem I can see with your plan is that the dining area could be a dark area -- by coming 'forward' you keep an extra window on the downstairs side profile . The problem with that suggestion though , is that the roof may look funny , with a lower centred peak and then an upper one , so I then wondered about still going above the garage , but having the upstairs wider in profile , effectively 'stepping' 3 metres or so over the 'old' house , effectively removing that 'corner' of the existing roof and having a floor above instead of roof trusses , and have the existing roof butt up to the new upstairs side wall -- it would look more balanced IMO , you won't need to remove all the existing roof and strengthen it -- by utilising the existing brick walls it may not need any additional strengthening ? By tying the existing roof trusses to the new side wall it won't need too much strengthening either . It should also look a lot less like an add-on if the styles and materials are matched correctly IMO .