To add a porch you will need to work with the roof if you want a covered one . I would remove the bushes on the right and plan a nice porch to run from the front door to the end of the house on the right side . You will need to get quotes for how to do this and the cost .I think either no porch or what I said a little porch added on where you show is really just like an entry porch

Can we see the house without the red lines?

I don't think your house needs a porch. If you add a porch, it will involve replacing your roof covering. Not an inexpensive expense.

What it needs is some landscaping to make it more interesting. Nothing is more boring than plain evergreen shrubs. Even if you add a porch the landscaping will still be boring. You can have someone design a new plan that still will keep your maintenance to a minimum.

Instead of a porch, I would add a slate or paver patio to the front of the home. Then some great landscaping.

Thank you all for the feedback! You've definitely given me a lot to think about - below is a picture of the house without the red boxes.

I definitely don't want to replace the roof as it is only a couple of years old. I'm also planning to add a covered porch to the back of the house that would be much more straightforward. Maybe I should start there first.

Take the shutters off the triple window.

In the meantime, prune all the hedges so they don't extend beyond your window sills. Maybe this will provide some inspiration