Why Does Running Power to a Detached Garage Feel So Complicated?

I totally get what you mean about “add as you go” biting you later. I’m knee-deep in my first garage reno and already second-guessing my choices. I figured two outlets would be plenty… then my wife wanted a freezer out there, and now I’m eyeing a compressor. Haven’t tripped anything yet, but it feels like I’m tempting fate every time I plug something new in. Is it really that much harder to just run bigger wire and a subpanel from the start? Or am I overthinking it?

Is it really that much harder to just run bigger wire and a subpanel from the start? Or am I overthinking it?

Honestly, I used to think the same thing - just slap in a couple outlets and call it good. But after living in an old house where every project turns into a “well, might as well do it right while I’m here” situation, I’d say running a subpanel up front saves headaches. Ever tried adding circuits later when the walls are finished? Not fun. But yeah, it does feel like overkill until you suddenly need it...

Running a subpanel from the start really does make life easier down the road, especially if you’re thinking about adding tools, EV chargers, or even just more outlets later. I’ve seen plenty of folks regret not sizing up their wire or skipping the subpanel, and it always ends up costing more when you have to retrofit.

Here’s how I usually look at it:
1. Figure out your *potential* needs, not just what you want today. That garage might be a simple workshop now, but what if you want a mini-split or a welder in five years?
2. Running bigger wire isn’t that much more expensive up front, especially compared to trenching again later.
3. A subpanel gives you flexibility - future circuits, easier troubleshooting, and you’re not constantly running back to the main panel for every little thing.

The only real downside is maybe a couple hundred bucks extra at the start, but you’re buying peace of mind and future-proofing. I get the temptation to keep it simple, but every time I’ve tried to “just get by,” I’ve ended up wishing I’d gone bigger from the start.

Totally agree on the subpanel - it’s one of those “do it right the first time” deals. I tried to cheap out years ago with just a single 20A circuit to my old shed, thinking I’d never need more. Fast forward, I wanted a compressor and a heater... ended up digging that trench again in clay soil. Not fun. The upfront cost feels like a pain, but man, it saves headaches later. Only thing I’d add is to double-check local code - some places get picky about grounding and conduit types, which can sneak up on you.

Funny how we always think “nah, I’ll never need more power out there” until the projects start piling up. I ran into the same thing at one of my rentals - thought a single line would be fine for just lights and a garage door opener. Then a tenant wanted to run a chest freezer and some woodworking tools... had to redo the whole setup. Ever run into issues with inspectors wanting isolated grounds or specific conduit? Seems like every town has its own quirks, and it’s a headache trying to keep track.