need help with this wall painted the wood units white what else could i do to improve it what about painting fireplace

It appears the main chimney breast project out a little bit. Would you consider creating a false wall/painted wood panel to cover the brick to each side of the breast ? You would have less brick on show, but it would make the chimney stand out and look more striking.

its solid stone i dont want to remove it at the moment

You could paint the stone white to unify the arrangement. A light white wash, not solid. This would not be reversible though. Style your bookcase first and then decide. It might be better to leave it and incorporate more earthy elements into your decor to make it less prominant. Trailing green plants on the shelf above it might complement it.

I would paint it all one colour, that is walls, chimney breast and stone fireplace. You could carry on with the white or another colour.

Hi James! If you want a clean look we would suggest covering up the open shelving with either some sliding doors/cabinet doors to make a cohesive look. Or if you want to keep it open - it will look great with a media wall depending on the interior design. I hope this helps, Sarah! 😊

Much more unified. The following the darker color of the mantle will keep the palette connected. Would the flooring be going thought the house, as if it has to transition to another flooring it’s worth thinking about that.

It looks great, such a transformation. I don't know your living situation (children or pets) but I prefer wood or carpet for a living room.