Brighton Flea Market sketch

Just roughed out my next painting. The flea market is just one road up from the sea at Brighton, so I want to get the feeling of the sparkling sky and the breezy sea air...plenty of seagulls!!
I love the colours! Just not entirely sure how to colour the windows at the moment.
You can see traces of a former life as possibly a coach house, the kerb is dropped to the road at the front, and the central pink pillar is different to the other three. maybe there was an arched entrance originally.
I wonder if there are any old photos out there...?