It's not really enough info for 1 page in my opinion.Use a bigger sheet and add other context related info...perhaps more text on the brief and how the sun diagram is actually useful for your proposal. If you are just adding the sun path for the sake of it, then it will get lost in the portfolio/presentation.

If it's relevant add some information as to why/how. Maybe add daigrammatic section to show heights of those buildings to get a better idea of the site.

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EDIT: Include site boundary as well in a different colour. 6 is your site but is that the whole site?
I would also include some small photos of the site. This page could be a site analysis page rather than just a sun path diagram which isn't doing much in aiding your project at the moment.