Can rainwater really be used as drinking water in a Hill Country custom home?

Yes — with proper filtration and disinfection. A potable rainwater system in Texas typically uses sediment filtration, carbon filtration, and UV or ozone disinfection before the water enters the home. Many Hill Country custom homes use rainwater as the primary potable water supply, with a well as a backup, or vice versa.

How much rainwater can I collect on a 6,000-sq-ft roof in Austin?

As a working rule, a 1,000-square-foot section of roof captures roughly 600 gallons per inch of rainfall. Central Austin averages 34 inches of rain per year; the western Hill Country averages closer to 30. On a 6,000-square-foot roof, that translates to a theoretical maximum of well over 100,000 gallons per year, with real-world capture rates running 75-90% of that after losses.

What size tank do I need for a Hill Country custom home?

It depends on the use case. For irrigation only, 10,000-20,000 gallons is common. For supplemental household water, 20,000-30,000 gallons. For primary potable supply on a property without a reliable well: 50,000 gallons or more—sometimes split across multiple tanks for redundancy.

Are tanks always above-ground eyesores?

No. Steel and concrete tanks can be placed below grade, set into a slope, or integrated into a structure such as a pool equipment building or a retaining wall. On luxury Hill Country builds, we routinely integrate tanks so they are entirely out of primary view corridors.

Does a rainwater system work on a tile or shingle roof, or only on metal?

It works on any roof, but a standing seam metal roof is the preferred surface — it sheds water cleanly, doesn't shed asphalt granules into the system, and is inert. Tile and shingle systems need more aggressive pre-tank filtration.

How does rainwater pair with a well in Hill Country?

Most of the systems we install use both. Rainwater is the primary supply when tanks are full. The well takes over during dry stretches. Some systems run the other way — with primary rainwater and backup irrigation. The right answer depends on the well's yield, rainfall, and the homeowner's drought tolerance.

Do I need a permit for rainwater collection in Austin or the Hill Country?

A pure landscape irrigation system typically does not require a building permit, but any connection to the home's indoor plumbing requires a licensed plumber and meets the Texas plumbing code's rainwater section. We handle the permitting and the plumber coordination as part of the build.

What does maintenance actually involve?

Twice-yearly gutter cleaning, an annual first-flush diverter check, sediment filter changes on a schedule (typically quarterly), UV bulb replacement annually for potable systems, and a tank inspection every few years. Most luxury homeowners outsource this to the same vendor that services their well and filtration system.