Because, I'm sorry to say, that you've got the basics wrong. That is, the orientation of the home
Orientation plays a HUGE role in the comfort & energy efficiency of your home.
Designing with this in mind is called "passive solar design".
This brilliant government website explains it all,
You want living areas to face north. Where they will be light, warmed by sunlight in winter, shaded by appropriate length eaves in summer - this is not a northern alfresco, it's far too large, shading the living area in winter, making it far darker throughout the year.
You want to minimise or eliminate western glazing. As the sun is lower in the sky in this direction (& the east), eaves are ineffective when the sun is in the west, which also happens to be the hottest time of the day.
You want to locate rarely used rooms to the west. The garage, laundry, bathrooms. You certainly don't want bedrooms with west facing windows, these can get blazing hot in summer evenings!
You have the perfect block, a pretty wide southern frontage. People pay a premium for these blocks. But I've got to say, your design totally wastes the opportunity.
You want to design a north facing home. Living areas looking into that north facing backyard. These living areas will be light, warm in winter, cool in summer.
So I'd start again. If the builders are upset, too bad. They are supposed to be the experts. They should be considering the orientation of the home, unfortunately the poor builders rarely do. They just want to get the house up at quickly as possible. You're the one stick with a dark, cold house. With far higher energy bills, which you'll continue to pay for years & years to come.
So I'd start again, building to passive solar principles. At the very least, I'd flip the plan, & move the also away from the north of your living areas. Much better to get more of your living areas facing north though.
Hi I was wondering is there any chance that you could look at my plans? Iv tried the website and I’m not great with visualising and orientation and I’m worried about hearing/cooling and sunlight.