Yes definitely. I built 4 last year for my asparagus and strawberries. I am to DIY what King Herod was to babycare but even I did it. Got rough timber from B&Q, couple of posts to hold them together, lined the bottom and filled with compost. Easy to look after and the allotment looks much tidier.
Absolutely fucking defo. Had some stunning results with all sorts, biggest surprise was the parsnips, lovely soil in raised bed then they hit the standard clay\soil but by God did they thicken out on top. Excellent