A little over half an inch of rain fell on Wednesday night, and by Thursday morning both of our new rain barrels were full to the lids. I went out to look at them in my bathrobe and Nate's rain boots, which tells you how this house feels about a hundred gallons of free water.
The bill that started it
Last August our summer water bill came to $214. The village bills us for water and sewer every quarter, and a winter quarter for the three of us usually runs $118 to $124. So something like $90 of that summer bill was the garden: 34 pots and two raised beds, watered by hand all summer with the galvanized can and a hose. I watered in my school clothes in June and in my pajamas in July, and either way it took most of an hour on hot days.
When I set the 2026 garden budget in January, I gave this project its own line, separate from the $500 for seeds, soil and plants. Partly so it wouldn't eat the garden budget alive, and partly because it's really a house project with a garden attached. It still went into the notebook, receipt by receipt.
The receipt
- Two 50-gallon rain barrels at $79 each: $158
- Two downspout diverter kits at $23 each: $46
- One drip irrigation kit: $54
- One battery-powered hose timer: $36
- Total: $294
Everything came from Home Depot, over two trips in the Forester. Nate supplied the concrete blocks the barrels sit on (left over from some earlier project, as most things in our basement are), a saw and most of last weekend.
How it fits together
The barrels sit on the two back downspouts. Nate cut into each downspout and fitted a diverter, which sends water through a short hose into the barrel until it's full and then lets the rest carry on down the downspout the usual way. That means no overflow pooling against the foundation of a 1924 house. The blocks raise each barrel high enough to fit the galvanized can under its spigot, and both lids have fine screens. We passed on paying anyone to spray for mosquitoes, so the last thing I want is to raise them in a barrel.
The drip kit runs off the outdoor spigot through the timer, with lines snaking through both raised beds. The timer turns on at 6:00 a.m., so the beds get water at the soil, before the sun hits them, whether or not I remember. The barrels cover everything the drip line doesn't reach: the sweet peas and the cut-flower strip along the chain-link, the native plants along the back fence, and as many porch pots as I'm willing to haul water to around the side of the house. Honestly, most of the porch will still get the hose.
Nate figures the back slope of our roof at about 350 square feet. An inch of rain on a square foot of roof is a little over half a gallon, so half an inch of rain off that slope comes to roughly 110 gallons. A decent storm fills both barrels, and anything bigger goes down the downspouts like before. Two barrels won't get us through a dry August. They will get us from one storm to the next in an ordinary week.
The payback math, honestly
$294 is real money. If the drip line and the barrels shave $40 to $50 off the summer quarter, the whole setup pays for itself in six or seven years. Maybe sooner if the spring and fall quarters drop a little too. Maybe never, if a barrel cracks in a hard freeze because I forgot to drain it, which is why "drain and flip barrels" is already written in the November page of my notebook. Nobody gets rich off a rain barrel.
What won't show up on the bill: no more standing in the beds with a hose at 6:45 before school, no more guessing which bed got skipped on a busy Tuesday. That part I'd pay for even if the math were worse. This is just what made sense for our yard and our bill. Water rates, roofs and town rules all vary.
The first week had two mistakes. The first diverter went in about four inches too low, which meant that barrel could only ever fill to four inches below the top. Nate moved it on Sunday afternoon and muttered something about measuring twice. And I set the timer for 30 minutes every day, which in late April soil turned the west bed into a swamp by Wednesday. It's down to 15 minutes every other day until the tomatoes go in.
"You paid money to catch rain," Sal said over the fence on Thursday, looking at the full barrels. I said yes. He nodded slowly, the way he nods when he watches me prune his fig cutting, and went back inside.
