I have to agree with Crafty Countess about having a vinyl flooring. I would recommend Loose Lay by Karndean. The range comes in wood plank and stone tile effects, does not have to be glued down except around the edges of the room and damaged "tiles" can be easily replaced. They are made for commercial use, so are very durable and will retain their looks for years to come. From our own tenants, I've found that white or off- white works best. You'll never get a colour right for a tenant. In the past, we've hung curtains, which our tenants always ask to take down and put up their own. We've painted lightly fresh or richly cozy feature walls, which our tenants have asked to paint over. So we always use a neutral paint now. We allow our tenants to hang pictures, providing they repair and paint the holes when they move out and use wall stickups that they can take with them. The less colour you put in, the more you allow your tenants to make the space their own.

We recommend shutters - we created bespoke plywood shutters for these triangular dormers in our arts & crafts inspired house

I’ve recently bought a large Roman blind from Blinds2go and it’s fab. The price was very reasonable, the service quick and the quality good. You can also order free fabric samples.

Thank you. Yes, the gable wall will be a feature. I think you are right able going plain on the window. I don’t think shutters will go with the overall vibe of the house, it’s a very modern build (photo from the back attached). I’m wondering if a plain but bright pink might work?