Can't see the room layout, but if you keep it, it could be a nook for a sofa or chairs by the fire on a cold night, with a rug in front. Definitely have a mirror on the mantle. Think about walls and rooflines before you do anything. Or if you've got lots of cash to splash, take it out as it may serve no purpose with a heatpump in place. Replace roof tiles, internal brickwork.........you see what I mean, just saying......

Hi 2Find! Thanks for your cohesive little selection of images. I will replace the lights for sure (though I have a pet peeve re those lights where the bulb is visible as am quite light-sensitive, preferring diffuse light). There is no furniture in the room, we aren't living there till the reno-extension is done as it won't have a kitchen. I would like to keep a muted pastel colour scheme throughout the entire house. Kind of a nod to the 30's. Sorry, but I can't do brown tile, it's a visceral thing! Cheers for the lovely photos siriuskey (lovely star system). Very nice and I probably will go for a pretty simple 30's weatherboard cape cod type theme. The house is a raw looking 'ranch' style from the US, lucky we have so much lovely British weatherboard culture to draw from. I adore that hallway!

What else is going to be done in the room? The heater revamp needs to be done in context. I'd beef up the mantle. And replace the fire place with a gas log look. Even a fake fire place adds value and atmosphere.

The less beige option, to create a slight contrast and it will suit your coastal vibe. Check this out too. https://firewarehouse.myshopify.com/