Here is the issue with the colour of the sofa - thanks to the beige walls and carpet on top of the couch colour the room lacks punch so you are presenting an overall impression of drabness. The room has a lot going for it and could be far better presented to highlight its good points. The whole point of putting photos online is to attract interest - you do this by means of visual impact.
As an alternative to a red slipcover for the green couch, if the OP wanted to she could paint the walls in a colour that would give it some oomph instead. To make the green furniture stand out and highlight the white shelves, if she wasn't fussy about the poang chair upholstery looking as if it didn't belong, she could choose a good deep grey blue or a barn red.
There is no magic to this, PCohle. You can't see it, that's all. Fwiw, I don't have a red couch or much red at all in my mainly pastel decorating scheme that includes some pastel green.
PickAChew when you are selling your house for over £300k you are presenting a lifestyle a family could enjoy there in 2019. If you have had your house on the market for a while and don't know why you haven't had an offer you can eliminate 'stupid buyers' from the list of reasons by a little redecorating involving very little investment of money and effort. Then if nobody bites you can conclude that there are issues like the one small bathroom and front facing kitchen holding people back, and decide if dropping the price might do the trick.
wowfudge I was brought up in a house that started out with one bathroom. We thought it was fine until my parents added a downstairs loo which made a massive difference to a family of five.
I owned a house that started out with one bathroom, and I added a second full bath. Again - massive difference. House was just under 1,000 sq ft.
A bathroom doesn't work hard. It's a facility, it's not a person.
^^ Pedantry.
Bathrooms are functional rooms. They either function well or poorly. A double sink is incredibly useful absent a downstairs loo. This house doesn't have room for one, unless a buyer were to rip out the bathtub and put in a shower (not likely for a young family or for anyone hoping to sell on to a young family). So price must be looked at given that there is just the one bathroom.
If someone other than a young family (say parent/s with two teens) were to move in - and given the front facing kitchen the house might be more attractive to this sort of family than one with small children - then whether the bathroom is up to the task becomes very important. Again, is a house with just one bathroom worth the price the OP is asking?
Again, given that it just has one bathroom, the best foot forward motto means the OP should look at taking out the beige flooring and replacing it with lino or wood-look tiles. It's not a huge room and a new floor wouldn't cost the earth.