A massive deck over difficult terrain to improve the living space at my house.
My backyard is steeply sloped and to make good use of an unusable piece of land I decided to build a 50sqm deck over boulders. The deck also gives us a great view of the park beyond our backyard. Previous to this I had no idea of how to lodge a DA or even build a deck! Thank goodness for YouTube. I took about a year to plan (and do some practice posts and mini decks) then 3 months to build. It was a fun challange and even now when I stand on my deck I am blown away that I managed to do it (I completed about 90% of the work myself). It is nice to have flat ground somewhere on my property.