19 Rainwater Collecting Ideas That Are Functional, Beautiful, and Easy to Build

Whether you’re a homesteader, gardener, or just someone who loves a clever DIY, collecting rainwater is one of the simplest ways to save money, conserve resources, and add charm to your outdoor space.

In this list, you’ll find 19 creative rainwater collecting ideas that don’t just work, they look great doing it.

From rustic barrels to sculptural downspouts and off-grid setups, each project proves that functionality and beauty can absolutely go hand in hand.

#1. Double Barrel Overflow Rain Station

With a compact corrugated roof feeding into a primary red barrel and a secondary gray overflow barrel, you won’t lose water even during a heavy downpour.

Materials Needed:

• 2 rain barrels (55-gallon each)
• Corrugated roofing panels (metal or plastic)
• 4 wooden posts (4″x4″, 6 ft tall)
• 8–10 wood planks (2″x4″)
• Gutter or downspout
• Hose (1–1.5” diameter, for overflow)
• Hose clamp
• Spigot kit
• Screws, brackets
• Saw, drill, screwdriver

Step-by-step Guide:

Step 1: Build a simple frame using 4 wooden posts and cross beams to support the roof. Raise one side slightly for water flow. Secure a corrugated panel roof on top.

Step 2: Place the main rain barrel on a sturdy pallet or platform beneath the roof’s edge. Install a downspout or gutter to direct runoff into the top of this barrel.

Step 3: Drill an overflow hole near the top of the first barrel and connect a hose that leads to the second barrel. Use a clamp to hold it in place.

Step 4: Add a spigot to the lower section of each barrel for easy water access, then seal around all fittings to prevent leaks.

#2. Raised Rain Barrel Collector

Sometimes the simplest ideas are the most efficient. This raised rain barrel setup uses a sturdy wooden stand to lift the barrel for better gravity-fed water pressure.

Materials Needed:

• 1 blue 55-gallon plastic barrel
• 4 pressure-treated wooden posts (4″x4″, 3–4 ft)
• 2–3 wooden support planks (2″x4″)
• Spigot kit
• Screws or lag bolts
• Drill, saw, wrench
• Downspout diverter or flexible pipe

Step-by-step Guide:

Step 1: Build a square stand with the four wooden posts as legs and 2×4 planks for bracing across the middle and bottom. Make sure it’s level and sturdy.

Step 2: Place the barrel vertically onto the stand. Mark and drill a hole near the bottom for the spigot, then install and seal it tightly.

Step 3: Connect the gutter or downspout into the top of the barrel using a diverter or flexible pipe. Ensure it directs water cleanly into the barrel.

Step 4: Optionally, drill a small overflow hole near the top and connect a hose to redirect excess water away from your foundation.

#3. Greenhouse Bench Rain Barrel Catcher

This upcycled rain barrel bench is more than just a place to sit, it’s a smart, sustainable way to collect water while making the most of your greenhouse setup.

Materials Needed:

• 2 or more 55-gallon plastic barrels (standard size: 35″ height x 23″ diameter)
• Jigsaw
• Drill
• Screws or bolts (1″–2″)
• Waterproof sealant
• Brackets (optional)
• Fine sandpaper

Step-by-step Guide:

Step 1: Place the barrels on their sides where rain naturally flows off your greenhouse or shed. Use chalk or marker to outline a large U-shaped section across the top.

Step 2: Carefully cut along the outline using a jigsaw. Remove the section and sand the cut edges.

Step 3: Push the barrels snug against the structure to collect rain runoff. Use wood planks or brackets to secure them in place if needed.

Step 4: Add a drainage hole or faucet at one end if you want to redirect or store the collected water.

#4. Funnel-Top Rain Barrel Collector