I get where you’re coming from, but honestly, I think people overdo the “pad the budget for surprises” thing sometimes. Yeah, old houses can throw curveballs, but if you do your homework—permits, inspections, maybe even a soil test—you can avoid a lot of the worst-case scenarios. I’ve flipped a few places where the “invisible” stuff barely made a dent because we planned ahead and didn’t just assume disaster. Not saying skip the contingency, but 20% feels high unless you’re dealing with a real fixer. Sometimes folks scare themselves out of doing anything fun at all.
I hear you on not wanting to overinflate the budget, but I’ve been bitten a couple times by things I just couldn’t predict—even with all the prep work. Had a backyard addition where the inspector flagged a sewer line issue that didn’t show up on any of the original plans or surveys. That one ate up a good chunk of what I’d set aside for finishes.
“if you do your homework—permits, inspections, maybe even a soil test—you can avoid a lot of the worst-case scenarios.”
That’s true to a point, but I guess my take is: you can do everything right and still get blindsided. I’m not saying you need to go wild with the contingency, but for something like a guest house—especially if you’re tying into older utilities or dealing with weird lot lines—I’d rather have a little extra cushion than end up scrambling.
I get that 20% feels high, but I’ve found it’s better to have it and not need it than the other way around. If you don’t use it, hey, more for landscaping or a hot tub, right?
I get where you’re coming from, but honestly, I think 20% is overkill unless you’re dealing with a really old property or you know there are issues lurking. Most of the time, if you’ve done your due diligence—checked utilities, had a solid inspection, maybe even scoped the sewer line—you can get away with a 10-15% cushion. I’ve done a couple backyard builds and yeah, surprises happen, but I’d rather not tie up that much cash “just in case.” If something big pops up, you can always adjust finishes or phase out some landscaping later. Just my two cents.
I hear you—tying up 20% can feel like overkill, especially if you’ve done your homework on inspections and utilities. I’ve seen folks get by with less, as long as they’re flexible about finishes or landscaping, just like you said. Sometimes it’s better to keep cash liquid in case something eco-friendly pops up that’s worth the splurge.
Sometimes it’s better to keep cash liquid in case something eco-friendly pops up that’s worth the splurge.
Totally get this. I’ve been burned before by going all-in on fancy tile or landscaping, then regretting not having a stash for a solar water heater or rainwater system that popped up later. I mean, guest houses are cool, but they’re like that one friend who always needs “just a little more” cash for snacks—costs sneak up everywhere.
If you’re flexible on finishes, you can really stretch your budget. I once did a backyard studio with reclaimed wood and leftover paint—looked quirky but saved a ton. The trick is knowing where to splurge (insulation, windows) and where to chill (fancy fixtures can wait). Keeping 20% tied up feels safe, but sometimes you gotta roll the dice a bit if you want room for surprises... or that composting toilet you didn’t know you needed.