I have a only a 10' x 20' area for my vegetable garden, although it's also bordered by a flower strip, and we have flowers in the strip by the driveway out front. Most of the backyard is grass and sturdy plants because of the two retrievers... and the front yard is too shady.
In my veggie garden I have two 6'x3' raised beds and four 3'x3' raised beds, plus a "strawberry tower." Last year was such a wash, between the weather and the rats chewing my tomato plants off at the stem, that I'm finding it hard to get as enthusiastic as usual, plus we had the latest snow here (last weekend) in western Wa that I've seen in 15 years, but... The two kinds of garlic I planted in October are coming up great, and my two kinds of potatoes should be arriving sometime this month. Didn't order tomato plants from Oregon like I do every year; I might not get the variety, but I'm going to wait until Seattle Tilth has their annual plant sale and pick them up there. That doesn't leave me much room. Sigh. I can stick some lettuce in with the garlic, put a crookneck squash into one of the 3'x3' bins, and... My husband wants corn, but I don't really have room for it, and I'd like green beans. If I had my way, I'd dig up the entire backyard for veggies.