Do I have enough space for a Cornus controversa 'Variegata'?

I would like to put in a Cornus controversa 'Variegata' at the front of the house to look striking and offer dappled shade. But I'm not sure if I have enough room for it because I've seen varying dimensions for max height and spread.
The space is 7m across and 6m from wall to footpath. I'm not committed to anything that's there already so happy to just have one striking tree.

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What you have there is already very attractive and not big on maintenance so it would be a shame to rip it all out and it couldn't stay because it will all provide too much competition for a young tree trying to get established. Nor would those plants be happy shaded by a tree.
Why do you want shade? For the front room? For the path? You could erect a trellis panel or two along the house edge of the beds and grow a climber up them to give shade and privacy.