East Valley line, 480
Gilbert is still legally a town, and most of its houses went up after 2000 on farmland crossed by irrigation canals. Town water, two electric utilities and a single permit office cover nearly every address.
Gilbert incorporated on July 6, 1920 and remains, legally, a town. From 1911 to the late 1920s it was known as the Hay Capital of the World, and it was still small in 1980, with 5,717 people. Then came 29,188 in 1990, 109,697 in 2000 and 267,918 in 2020, and the current estimate is 280,262. Housing follows that curve: the median home was built in 2003, 59.6 percent date from 2000 or later and only 4.1 percent from before 1980. This site covers the town on two pages, North Gilbert and South Gilbert.
Single-family detached houses are 81.7 percent of units and 73.1 percent of homes are owner-occupied, while buildings with five or more units hold 10.3 percent and mobile homes 0.3 percent. A detached house with a tank water heater in the garage is the standard case here: when the tank fails, water spreads across the garage floor, under the door to the house and into baseboards and carpet edges. Town water itself goes back to 1925, when a town well fed a 50,000-gallon steel tank 130 feet high and replaced private household wells.
The Consolidated Canal reached Gilbert in 1904, the Eastern Canal was built in 1909 and the Western in 1912 and 1913. Today the Town's North Water Treatment Plant draws up to 45 million gallons a day from the SRP Eastern Canal, the Santan Vista plant shared with Chandler treats Central Arizona Project water, and 17 wells supply about 44 million gallons a day for peak demand and canal dry-ups. The Riparian Preserve at Water Ranch, created in 1999, includes 70 acres of recharge basins that put water back underground.
Gilbert's most recent hardness figure available here dates from 2016, when the Town's Water Quality Report gave calcium hardness averaging 11 grains per gallon, from 6.7 to 15.2. Water in that range leaves scale in tank water heaters, softener and dishwasher valves and evaporative cooler lines, and the parts that hold back pressure wear out sooner. Flushing a tank on schedule and replacing braided supply hoses before they bulge are owner-level jobs; once water has soaked walls or flooring, it becomes an appliance leak that needs drying.
The Town's utilities page lists SRP and APS for electricity and Southwest Gas for natural gas, without a map of who serves where. The distinction becomes practical after storms. The back-to-back monsoon storms of July 9 and 10, 2021 brought gusts near 60 mph, toppled trees in downtown Gilbert, knocked down fences and left thousands without power, and a wet house cannot dry while its fans and dehumidifiers sit idle. The utility named on the bill is the one to call.
Construction permits come from the Town of Gilbert Development Services Department at 90 E. Civic Center Drive. Not every address inside the town's outline is Town land: the Assessor shows unincorporated county islands such as White Fence Farms in 85234 and Chandler Mesa Ranches and Brooks Farms in 85298, and those parcels go through Maricopa County Planning and Development in Phoenix. The parcel record on the Assessor's site settles the question for any single lot.
A Flood Control District study of the East Maricopa Floodway found a design capacity of 8,000 cubic feet per second against existing 100-year flows of 16,000. The district proposed off-line basins at Rittenhouse and Chandler Heights to hold back flows from the Sonoqui and Queen Creek washes, and the Chandler Heights Basin near Ocotillo and Higley roads is planned to become a Gilbert park. For a homeowner, the practical step is to look up the parcel's flood zone and keep yard drains and scuppers clear before monsoon season.
Recent storms show where water gathers. On September 8, 2014, weather service photos caught flooding near Val Vista Drive and Germann Road. On October 12, 2025, the Gilbert gauge recorded 3.15 inches in 24 hours and flooding closed Loop 202 near Cooper Road. Street water reaches houses through garage thresholds and patio doors, and then baseboards and carpet pad. Calls from every Gilbert ZIP go through the East Valley line to an independent contractor for monsoon flood cleanup and other water damage.
| ZIP | Postal name | Page |
|---|---|---|
| 85233 | Gilbert | North Gilbert |
| 85234 | Gilbert | North Gilbert |
| 85295 | Gilbert | South Gilbert |
| 85296 | Gilbert | North Gilbert |
| 85297 | Gilbert | South Gilbert |
| 85298 | Gilbert | South Gilbert |
A town. Gilbert incorporated on July 6, 1920 and is still legally the Town of Gilbert despite its size. Permits and water run through Town departments, while unincorporated county islands inside its outline answer to Maricopa County.
The number on hand is the Town's 2016 Water Quality Report figure: calcium hardness averaging 11 grains per gallon, with readings between 6.7 and 15.2. The Town has published newer reports since, and its latest edition will carry a current reading.
The Town of Gilbert Development Services Department handles construction permits at 90 E. Civic Center Drive in 85296. If the parcel is an unincorporated county island, Maricopa County Planning and Development is the office instead.
Nothing local on this page is taken on trust; these are the records it was checked against.