I love your idea of extending, but understand your concerns re over-capitalisation. I think your budget will need to reflect how long you plan to stay in the house, and whether you consider the enhancements to your lifestyle as valuable an investment as the actual financial cost vs possible capital gain. Have you thought of getting in a real estate agent to discuss what effect any potential extensions or changes will have on the value of the property? I agree with MB above that the laundry is under-utilised space, and using the entry space would also be a very cost-effective solution. A way to really modernise the home with less expense than a large extension and new ensuite bathroom would be to close off the door between the existing bathroom and toilet and add a toilet to what would now be the master ensuite. The laundry and current toilet could become the family bathroom, and the kitchen could be extended very slightly by pushing out the exterior wall to create a scullery with back door, which could be closed off from the kitchen with a cavity slider. If you pushed out the laundry/bathroom wall to match, you could add a bath, too. Best of luck.

I put a lot of thought into what kind of sink to install ino my new kitchen: single vs double, stainless steel vs other materials, dish drainer or not, and finally undermount vs top mount. I went safe and chose industrial grade steinless steel, double sink without a drainer but with aditional part with multi purpose. I was very indecisive about the last thing: undermount vs top mount sink and finally decided after reading this - I will go top mount.

I would choose your paintings then take the colours from them for your cushions and throw. Add a textured rug. I think the large black TV coupled with the black TV cabinet detracts from the room. Lovely floors and paint colours. This should not be a hard project with such a lovely room and well chosen furniture.

I agree with all the comments about back rests and white stools getting dirty easily. My friend was devastated when her guest sat on her brand new white chair with jeans and the indigo dye from her jeans stained the chair forever. I’d also be wary that the white you choose for your stool blends with the white of your kitchen. From memory, your kitchen and bench tops are a warm white. The stark white of those stools could be jarring to the eye. Just saying....