Pale tone paint should certainly help. Along with that, glossy finish on cabinetry and mirrored splash back will help reflect light. Using mirrors in you decorating also. Are there any design changes you can make to help remedy the issue? ie. solar tubes/skylights, ceiling window, mix roofing materials for verandah?

This is great! Thanks for this - will definitely be updating my hallway and courtyard with some mirrors!

I've had stick on 'privacy' frosting on some of my glass doors for more than 20 years. The first I used was over arctic glass panels in a loungeroom, not for privacy but for decor and on a perspex panel that replaced another door. Very successful on both surfaces given that the arctic glass is of a "bubbly texture"...so my experience with frosting has been very successful. The rolls of frosting available today come in many beautiful designs both coloured and plain. The "Lady powdering her nose" design could probably be found on websites advertising frosting.....easy to say I suppose. I've been experimenting with other materials very successfully. Christmas spray-on frosting and stencils on a glass bathroom door...been there for 8 years and still good. Also, strips of that continuous "lace" curtaining..find a design with a pattern that can be cut out without looking like its "a bit" of something..that is a "self contained" design....if you can envisage that. Again on a full glass bathroom door leading out to a semi enclosed veranda. I cut out the design, filled a a long receptacle wirh a mixture of that white gooey woodworking or craft glue.."Aquadhere" and water..enough glue to slide the soaked netting easily from the receptacle up the glass door...(like hanging wallpaper). Have the glass squeaky clean and just a little misted with water, Smooth out the lace design when it is positioned...and let it dry. The glue goes transparent on drying. I made a 'lace' panel down the centre of the glass. After all was dry I sprayed the whole of the glass surface with the same Christmas spray on frosting...often called "Santa fosting".....and I have privacy. On other glass surfaces I've added little stencils over the frosting...as oklouise mentions creating a layered effect. This experiment is very successful...been there since 2006 Have some fun experimenting. Its easy to remove if you don't like it, and you can have any size design you like and its not costly. Sorry, no digital pics.

Thanks everyone, again, a lot to think about! With regards to changing the structure of the house to make it more open plan - making one large living/dining/kitchen room is not something I want to do, it means getting rid of the 50s styling (inbuilt shelving brickwork etc) which I love about the house in the first place. It would also not be very practical for Hobart living, with freezing winters heating such a large space comfortably (initial heatpumps plus ongoing winter bills, without or without the wood heater )- would be completely out of my budget to be honest. I'm also not a huge fan of open plan living in general. The sunroom is effectively a 'tacked on' room to the outside of the house (load bearing wall). It was the original concrete deck just enclosed with plastic sheeting roof and walls, again a very costly renovation that I wouldn't be able to afford without years of saving. I'm liking these suggestions though- its all stuff that hadn't even crossed my mind. I think I will go with turning the bedroom into the kitchen and opening up the house from that side, I think that because it's a one bathroom property, it makes sense to me having 3 bedrooms and a larger kitchen/dining space. Thank you again for all your help and detailed responses :) Laura