Yep, it's an outdoor sink! My husband has been talking about doing this for months, and something finally spurred him into action! He's no professional builder, but he did study Industrial Design at uni so he can wield a hammer and nails with relative prowess. He built it pretty much in one day, using mostly leftover timber offcuts. The plumbers arrived this week to connect the water -- we opted for a pull-out tap so we can give the kids a handheld shower during the Summer months or when they come in feral from playing in the dirt!
The sink is right next to the BBQ, so I figure it'll come in handy for all manner of uses...
ps. There is one reason for our motivation to install the sink... and its a pretty exciting one! Actually, its the most exciting thing to happen to us for ages! Tomorrow I'll share some other updates to our outdoor courtyard and garden and maybe, just maybe the reason for our excitement!