Looking out onto a rainy street -W.I.P

Looking to create a scene with someone looking out of a window, onto a shiny, wet street. Light reflecting in puddles from street lights, vehicles and building.  I want it to be very colourful and vibrant on the outside, but in the interior I want it to be quite dark and depreciated.  I want to tell a story about a building and a person who has been left behind and is stuck in the past. I want it to be set in a UK city, during the Autumn at around 10pm.

Window Model:

I'll base the window on something like the image below - quite old and worn to give personality.

 

First window render - 

I've modelled the window and walls and have put in a HDRI map sky.  I reduced the output amount of the HDRI as it was too bright for 10pm at night during the autumn.  

I've applied a simple glass shader to the window pane and increased transmission values in the render settings to increased the amount of light and colours from the sky coming through the window.  You can also see the reflections on the glass, coming from the interior. 

I think I may need to soften the shadows but will see what it looks like after adding more lights. 

Wallpaper and test materials/lights

I want to create a wet and shiny cobbled street area outside so the colours from the reflected lights travelling across it like these examples:

I really like the way the colours splash across the ground, and create almost a painted effect from the reflected light.  I think it adds a lot of depth to texture as well. Also, will help with the contrast between the dreary inside and modern, colourful exterior.

Not too sure about how intense the light appears on the reflective surface - will lower it to experiment.

lowered exposure too much here after halving it, the reflected light is no longer visible. 

Material setup: added screen and coat layer to a cobbled street texture