Couldn't agree more about leaving some breathing room. When we built our place a few years back, I remember thinking we'd mapped out everything perfectly—garden beds, patio, even a spot for a future shed. But sure enough, once we actually started living there and using the space, we realized how quickly things filled up. Suddenly, the kids wanted a trampoline, my wife got into composting (which is awesome, but takes more room than you'd think), and I found myself wishing we'd planned just a bit more wiggle room.
One thing I've learned from building homes is that it's always easier to have extra space and not need it right away than to scramble later trying to squeeze in something you didn't anticipate. If you're still in the planning stage, here's what I'd suggest: grab some stakes and string, and physically mark out your planned garden beds, sheds, or compost areas right on the lot. Walk around it, visualize it, and see how it feels. You'd be surprised how different things look on paper versus in real life.
Also, totally second the suggestion about keeping raised beds simple at first. We started with untreated cedar boards—nothing fancy—and they've held up great for several seasons now. Plus, if you decide you want to rearrange things later, it's way less painful when you haven't sunk a ton of cash into elaborate setups.
Bottom line: plan generously, start simple, and leave yourself some flexibility. Gardens (and families!) have a funny way of growing beyond your initial expectations...
"grab some stakes and string, and physically mark out your planned garden beds"
This is solid advice. When we redid our backyard, I sketched everything meticulously but still ended up shifting the seating area twice after actually sitting there... Paper plans rarely survive real-world use intact.
This is spot-on advice. When we first planned our veggie garden, I mapped it all out on graph paper down to the inch, but once we staked it out, it felt cramped. We ended up widening the paths and shrinking the beds a bit—made a huge difference for comfort and maintenance. Paper is great for rough ideas, but nothing beats physically marking it out and walking around. Saves a lot of headache (and money) later on...