The thing to bear in mind is that you need a defra exempt stove if you are planning to burn wood in a smokeless zone, but there are loads available. I would let the installer deal with with the hearth along with the flue liner when it is installed. I have an open fire with a gas tray fitted and its great and also a stove which I love but as people say does throw out a lot of heat. These photos are my house, both of the fires were supplied and installed by Harrogate Feature Fireplaces. The sitting room fire is one of their huge selection of period cast iron fireplaces, and the stove is by Yeoman.

As OnePlan says, everything beyond the door height marked is pretty restricted, so this applies to the En-suite, the Main bathroom and the hot press.If you can move the stairs down, you will less of a problem with at least the Main Bathroom and Hot press. I don't think there's enough room left with proper head height to justify a wardrobe and then an en-suite beyond. If you see where i was going earlier with the stairs and landing, they are what are eating all the full height space. You really need a concept planner that can show you in 3D how restricted the areas are. Our attic for instance when you come back from the eaves to achieve a height of 6 ft is around 8 feet from the edge of the house. None of that area is fit for anything but storage as it's just too low. None of this is to scale, but you get the gist:- I also agree with an earlier post that swapping the main bathroom and hot press makes more sense.

Hi Zack, grout line in the middle is not very nice and it's normally avoided. 60x60 tiles are more modern compared with 45x45 but generally speaking you should run one full tile 60x60 in the middle and two halves on each side. If you have a good quality picture of your hallway and a quality picture of the tile(s) I can generate a CGI (computer generated image) to show you what your hallway would look like. Get in touch if you need more advice.All the best

Alternatively consider reducing more windows to two panes so this one window doesn’t stand out.