I did raised unbordered beds in my garden - is that what you're thinking to do, or will you be putting borders on your rows? Either way, I'd say to leave 3 feet for wheelbarrow access, but with unbordered beds you may need to leave more like 4 feet as they tend to slope into the paths. I started out with 2 ft paths last year, which was already really tight, and now they're down to a foot or less.

I will be expanding/redesigning the garden primarily to solve this problem. Ok, I'm kidding myself - of course I want to grow more! But I swear I will leave much wider paths, both for me and my wheelbarrow to access.

It sounds like you'll end up with a very charming garden - please post pics when it's done!

~emmers

BE SURE to have enough wheelbarrow room! I did enough to get the WB through (maybe 2 1/2 ft), but not enough to turn and dump without stepping in the other bed. Give yourself 4 ft if you can.
I had a 6x8 HFGH and quickly outgrew it before it blew away!
If you have the room and the $ go larger! I LOVED sitting in the GH in the middle of winter with some flowers blooming, reading a great book! Nancy

Ive really been torn on the greenhouse size. I don't have room for anything wider than 8 feet for sure, and Id probably be ok with a small wheelbarrow. On the other hand do I really loose that much room on the 6ft one? There would be plenty of room to get past it with the wheelbarrow at a 10ft wide section.... I just wish I had a bigger yard :)

Maybe if you look around you can find a mroe compact garden cart that would work? If you weight the cost of a new cart against the additional growing room, it might make $ense.

I have raised beds in my side yard and I love them. The beds are mixed sizes: either 8'x3.5' or 6'x3.5'. My paths are three feet wide and I wouldn't want them any narrower. This is a comfortable width for the wheelbarrow too. I have an arch at one end, a border of ornamental grasses at the other end. On one side is a bench with arbor and a border of boxwood. The fourth side is the sidewalk going down the side of my house.

Oops. Meant to include this link. Hope it helps. These were taken in May, as I recall.

Here is a link that might be useful: My raised bed garden

For a wheelbarrow path: Measure the width of your wheelbarrow, and then consider what you plan on growing next to the path. Many plants are narrow enough at the base, but bush out at wheelbarrow height and reach into the path. As plants grow, paths shrink. Emmers is quite right.
My paths started out in spring just the width of the wheelbarrow, which was great for bringing in manure. Now they are about two feet and the wheelbarrow no longer fits.

Ideal path width for walking paths depends on the crop. If you're only planting lettuce or low herbs, you can get away with a foot wide path, which has to be walked like a balance beam but does maximize growing space. I wouldn't do it, but some people in the community garden here do. For comfort, go at least the width of your shoulders.

My veggie garden is about 17' x 16.' It's a community plot, so I can't make it bigger; but that size does allow room for a lot of veggies. I think you'll find room for what you want. Have fun with your space.