Stress is good for that type of activity (garage construction) because it generates focus, creativity for you, and it is scientifically proven that whoever dominates the mind, accompanied by thoughts with actions will take you where you intend for good and for bad.
I have heard that stress only kills those who think that stress is bad. I have never thought it a negative, even though I still feel stressed at times. I see it as not being good enough, skilled enough, ready enough to deal with what I am facing.
The stress is not going away. It's always going to be there. It is essential to learn to walk with that emotion next to us, so as not to stay paralyzed and move forward, just as it happens to you and also to me.