How do we set up smart irrigation controllers and rain sensors on our HOA's common areas?

By OurHOA · General information · Revised October 26, 2026

How an HOA board replaces old sprinkler timers with smart irrigation controllers: rain and flow sensors, zone programming, watering rules and who holds the login.

Part of the HOA board handbook: vendors, projects and upkeep.

The short answer

Many associations still water the entrance and medians with clock timers that run the same minutes in April and August. A smart controller changes the run times from local weather data or from soil moisture readings, and EPA says a properly installed WaterSense labeled controller can cut irrigation water use by 15 to 30 percent. The word that matters there is properly. The savings come from what gets entered for each zone, from sensors that work, and from an alert that reaches a person when a pipe breaks at 3 a.m. Do the project in this order: inventory the cabinets, fix the leaks, write a one-page spec, have a licensed installer put it in, program every zone, and put the account and the alerts in the association's name. If the board hasn't yet measured where its water goes, start with our guide on cutting the water bill with an irrigation audit. Rules vary by state, by water provider and by your governing documents, so treat this as education, not legal advice.

What Texas, Florida and Colorado require

In Texas, the irrigation rule at 30 TAC 344.62(j) requires every new automatically controlled system to include a sensor or other technology that stops it during rain or when the soil is wet, installed to the maker's instructions. The same subsection reaches existing systems: a repair that requires replacing the controller must add the shut-off device too. A few far West Texas counties, El Paso and Pecos among them, are excluded. On new installations, any master valve goes on the downstream side of the backflow assembly. Who may do the work matters as much. Occupations Code 1903.251 requires a state irrigator license to install, alter, repair or service a system, and the exemption for property owners' associations in section 1903.002 covers only members working on association property of less than half an acre used for looks or recreation. Replacing the controllers that run a whole subdivision's common area is a job for a licensed irrigator. In Florida, section 373.62 requires anyone who installs an automatic landscape irrigation system to install, maintain and operate technology that shuts it off when there is enough moisture, and any licensed contractor who works on the system must test each of those devices and fix or add one before finishing. Subsection (7) lets certain systems with soil moisture sensors and remote monitoring get a variance from day-of-week watering limits, but only after a monitoring entity certifies a list of conditions that includes posted signs and an annual review by a professional engineer or landscape architect. Other watering limits still apply, so don't buy hardware on the promise of the variance. Colorado sets these rules through water providers. Denver Water's summer rules run May 1 to Oct. 1, bar lawn watering from 10 a.m. to 6 p.m., and require leaking sprinkler systems to be repaired within 10 days. After declaring a Stage 1 drought on March 25, 2026, it moved customers to two assigned days a week and asked parks and other large irrigators to cut use by 20 percent. Ask your provider which group your common area falls in.

Take inventory before you shop

Open every controller cabinet with the landscaper and fill in one line per cabinet: location, make and model, stations used and spare, power source, which meter it draws from, whether a rain sensor is wired in and working, and whether a master valve or flow sensor exists. Photograph the wiring before anyone touches it. Then stand at each cabinet with a phone and check whether the clubhouse Wi-Fi reaches it and how much cell signal shows. The cabinet at the entrance monument is often out of Wi-Fi range, and that one decides whether you need a cellular model, which may carry a data fee. Last, fix the system before you replace the brain. A smart controller will still run a zone with a cracked line. EPA's commercial guidance says weather-based controllers work only when they are installed and programmed for the site's landscape and the irrigation system it actually has, so leaks, tilted heads and high pressure come first.

Write a one-page spec

A spec makes two bids comparable. Ask for these items: WaterSense labeled controllers, weather-based or soil moisture-based. A model that uses both kinds of data must be certified under both specifications. Enough stations for every zone plus two spare. A rain sensor on every controller, plus a freeze sensor where you get hard freezes. EPA lists freeze sensing as a way to stop watering in freezing weather. A flow sensor and a master valve on each meter, so the controller can shut a zone down when it sees more flow than normal. EPA's guidance names flow monitoring as the tool that stops irrigation when a pipe, fitting or sprinkler breaks. The ability to lock in the water provider's allowed days and blocked hours. The WaterSense label requires controllers to handle local watering restrictions. One brand across all cabinets where possible, so one login shows the whole property. From the installer: a Texas irrigator license number where it applies, programming of every zone, a tested rain sensor, a zone map, a printed programming sheet, training for one board member, and the administrator login handed over at the end. Ask for any yearly subscription or cellular fee in writing. Then check the WaterSense rebate finder and your utility's own program before you order anything.

Program each zone, not the controller

A WaterSense labeled weather-based controller builds its schedule from local weather and the attributes of each zone, such as plant type, soil type and slope. If the installer skips that and copies the old run times into the new box, you paid for a clock with a phone app. For each zone, enter the plant type (warm-season turf, cool-season turf, shrubs on drip, trees), the sprinkler type and its precipitation rate, the soil, the slope and the sun exposure. If an audit measured precipitation rates with catch cans, use those numbers instead of the defaults. Turn on cycle-and-soak for slopes and clay, which splits one long run into short ones so water soaks in instead of sheeting into the gutter. Enter the allowed days and blocked hours first, so the smart schedule works inside them. For the first month, compare the run log with a weekly walk of the property. Labeled controllers alert you when they stop running in smart mode, and they return to smart mode on their own after a manual test cycle. What they can't stop is a crew that switches a zone to a fixed schedule in July to quiet a complaint and never switches it back. Check the mode on every zone once a month.

Put the account and the alerts in the association's name

The cloud account behind a smart controller is an association asset, the same as the bank login. Create it with an email address the board controls, not the landscaper's or a director's personal inbox, and give the landscaper a technician login if the platform offers one. Store the credentials where the next board can find them; our guide on board email and shared accounts covers how to set that up. Decide who gets which alert. High-flow and offline alerts should reach two people: the landscaper's account manager and one board member or the community manager. Then put the response in the landscaping contract. A workable clause: 'Contractor shall respond to any high-flow or controller-offline alert within 24 hours during the irrigation season, check every zone's mode monthly, and include controller run totals in the monthly service report.' At each board turnover, change the password and update the alert recipients.

A sample rollout, a motion and an owner notice

January: inventory the cabinets and check the signal at each one. February: send the spec to two licensed contractors and apply for any rebate. March: install, after the spring backflow test where your utility requires one. April: program every zone, test each rain sensor, and set up the alerts. May through September: review the run log against the water bill each month. October: compare gallons with the same months last year and shut down or switch to the winter schedule. A motion the board can adapt: 'Move to replace the [number] common area irrigation controllers with WaterSense labeled controllers with rain sensors, flow sensors and master valves, installed and programmed by [contractor] for no more than $[amount], with the administrator account held in the association's name, and to apply for the [utility] rebate before purchase.' A paragraph for the newsletter: 'This spring we are replacing the sprinkler timers on the common areas. The new controllers skip watering after rain and change run times with the weather, so you may see the sprinklers run less often or at different times. They still follow [utility]'s watering days. If you see a broken head or water running into the street, tell [contact].'

Mistakes boards make

Buying a Wi-Fi model for a cabinet the Wi-Fi never reaches. Letting the landscaper open the account under the company's email, then losing access when the contract ends. Mounting the rain sensor under a tree or an eave, or leaving its bypass switch on after a test. Cutting the flow sensor from the bid to save money, when it is the part that turns a broken line into a same-day alert instead of a line item on next month's water bill. And skipping the monthly mode check, which is how a smart system quietly becomes a dumb one by August.

Sources

These guides are general education for HOA boards and residents, not legal, tax, or financial advice. Rules vary by state and by your community's governing documents - check with a professional for your situation.

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