Gain landed above the single-filer exclusion and the receipt box carried the top slice

Move the sale price down 100k and this whole post evaporates, vellum. Gain would've been under the exclusion, the receipts wouldn't have mattered at all, and you'd have written a shorter post about paint. Which is fine! I just want the newer people reading to see that the record-keeping only paid because your market ran. It was cheap insurance either way.

Twenty-seven months with a torn-up house and a single income. How bad did it actually get in month fifteen or so?

@vellum, the four-minutes-per-item thing is the bit I'd sell. I've got clients who'd pay someone a small monthly fee just to keep that folder current and named properly, because they'll never do it themselves and they always find out too late that it mattered. Did you build the folder from the start or bolt it on when you realized where the gain was heading?

Your basis was 405k and you sold at 745k, so the deal carried an enormous appreciation component that had nothing to do with your 95k. Do you have a read on the split? If I underwrote this at purchase with flat prices, the renovation alone at 95k spend against maybe 130k of value added is a thin two-year outcome for the lifestyle cost you paid. The tax treatment didn't make the deal, the market did, and the tax treatment made you keep it.

The cash-to-a-guy thing is so common on the trades side it's basically the default. From my end, the ones who ask for a W-9 up front get a slightly higher number and cleaner paper, and I've never once had a homeowner regret paying the difference. 12k of undocumented work on a deal where basis mattered is a scary amount to reconstruct from texts.

Different world here. In my markets a house goes 90k to 165k and the gain never gets anywhere near 250k, so nobody in my area is ever fighting for the top slice. The exclusion still matters, it just means the whole modest gain comes out untaxed instead of part of a big one. Reading your post I can't tell whether the strategy is better where prices are high or where they're low.

We invoice everything, so my own projects end up documented by accident. That's the one advantage of running a crew: the paper exists whether I care or not. @solder is right that the number goes up when the paper appears, and it's still cheaper than the alternative you described, vellum.

Naive question from the capital side: did any lender care that you were renovating while living in it? I'd assumed an owner-occupied loan on a house that's half torn up would draw somebody's attention, and I've never seen how that plays out in practice.

What actually counts as an improvement here? I've been assuming anything I hire someone for, but @fathom's water heater example says otherwise and now I'm less sure.

@vellum what did the folder look like in practice? Spreadsheet with links, a shoebox, an app? I want the version that a normal person keeps up for two years, not the version that looks good in a post.

The two years of ownership and two years of residence are what I keep turning over. You were at twenty-seven months so you had room, but if you'd needed to move at month twenty for a job, does the whole thing collapse, or is there some partial treatment? That's the risk that would keep me from starting, more than the dust.

I'm planning a first purchase and this is the post I needed. My worry isn't the tax, it's that I'll do the work slowly, lose track of what was spent in year one, then guess. Did you reconcile the folder against your bank statements monthly, or only at the end when you were putting it in front of your CPA?

@sextant's split question is the real one. In an inner-ring suburb going from 310k to 745k, a lot of that number is dirt, and the dirt appreciated whether you touched the kitchen or not. You bought a well-located lot with a house on it and then improved the house. Worth knowing which of those two decisions paid you, because only one of them is repeatable by working harder.