Which Missouri City Addresses Are Covered
Coverage follows the ZIP on your address rather than the city limit, and Missouri City's land is spread over five ZIP codes. The percentages below are estimates of land area (not addresses), calculated from the Census Bureau's 2020 ZIP-to-city relationship file, and Census ZIP areas only approximate postal boundaries.
- 77459 · covered
- Roughly 59% of the city's land area. The ZIP also takes in much of the Sienna area, part of which sits outside city limits.
- 77489 · covered
- Roughly 22% of the city's land area. About 41% of this ZIP's land is inside the City of Houston, and a sliver crosses into Harris County.
- 77071 · covered
- Roughly 3% of Missouri City land sits in this Houston ZIP, which is on the Houston coverage list.
- 77545 · not covered
- Roughly 9.5% of the city's land area, by the same estimate. Addresses here cannot be placed right now.
- 77479 · not covered
- Roughly 5% of the city's land area (4.7% by the estimate), toward Sugar Land. Also not on the list.
- County
- Mostly Fort Bend. The city reports about 10% of its residents living in the Harris County portion.
What Your House Age Says About the Repair
Missouri City built more homes in the 1970s than in any other decade, about 6,100 of its 28,600 housing units by the Census Bureau's 2020 to 2024 survey. Building never stopped, though: roughly 1,250 went up in 2020 or later. The two ZIPs split along that line, with a median build year of 1986 in 77489 and 2004 in 77459.
Houses from the 1970s and 1980s
- The original appliances are long gone, so the weak link is often the house side: the washer box valves, the gas stub behind the range, the dryer duct.
- A dryer that takes two cycles in an older laundry room may be fighting a long, crushed or bent duct. The International Residential Code caps an exhaust run at 35 feet, less for each elbow, unless the dryer maker allows more.
- A gas dryer or range reconnected to an old stub raises a plumbing question, not just a repair one (see the next section).
- A kitchen refrigerator moved to the garage after a remodel may be running outside its rated range. GE rates its garage-ready models for 38°F to 110°F, and a standard model may be rated for less, so check the manual before paying for a repair.
Houses built since 2000
- Builder-installed appliances from a 2012 to 2016 house are now at or past the ages NAHB's industry estimates give for dishwashers (9 years) and washers (10 years).
- Long parts coverage may still apply. LG's refrigerator warranty covers the inverter compressor for parts and labor for five years, then parts only through year 10, and Maytag has a 10-year limited parts warranty on key parts of major appliances made after 2017.
- Samsung covers the Digital Inverter Motor on its washers and dryers for 10 years, so a motor fault on a newer Samsung is worth a warranty call first.
- Newer machines report faults as codes. Photograph the display before you reset anything, then check the appliance error code library.
Missouri City or Houston? It Matters for Gas Work in 77489
Roughly 41% of ZIP 77489's land sits inside the City of Houston, so two neighbors with the same ZIP can answer to different building departments. For a fridge, washer or dishwasher repair that makes no practical difference. For anything touching a gas line, it can.
Texas law defines plumbing to include the pipes and appliances that carry gas, and their installation and repair. Inside Houston, the city requires a plumbing permit for the point where a fuel gas appliance connects, and that permit has to be pulled by a master plumber registered with the City of Houston. Whether a straight swap onto an existing gas outlet needs one isn't spelled out on the city's page, so ask before the old unit is disconnected.
On the Missouri City side, ask the same question of whoever does the gas connection. Either way, a technician fixing a gas range or oven or a gas dryer is a different job from running new gas pipe, and the second one belongs to a licensed plumber.
Five Water Operators Serve Missouri City Neighborhoods
Ask ten Missouri City neighbors who runs their water system and you may hear five answers. The city's own operator list assigns subdivisions to Quail Valley Utility District (Quail Valley, Lake Olympia, Thunderbird, Lake Shore Harbour, Quail Green), Si Environmental (Riverstone, Sienna Plantation, Colony Lakes, Hunters Glen), Fort Bend County WCID No. 2 (the Missouri City Town Site, Hunters Green, Liberty Ridge, Woodland West), Municipal District Services (Lake Colony, Olympia Estates, Vicksburg) and Inframark (Colony Crossing, Fondren Grove).
Drinking water reports are published system by system, and not every report prints a hardness number. The city's 2023 report for its Mustang Bayou service area lists groundwater as the source and no hardness line at all. If yours is silent too, call the operator on your bill or buy hardness test strips.
Why bother? Minerals leave scale on the small screens and valves that meter water into appliances. A scaled inlet valve can starve an ice maker until it makes half a bucket, and the same minerals can leave a white film on glasses from a dishwasher that is otherwise working. Samsung also recommends a new refrigerator water filter every six months, which is cheaper than any valve.
Before You Call From Missouri City
Five minutes with these saves a second trip.
- Confirm the ZIP on your mail. If it reads 77545 or 77479, the line cannot place the call even though the address says Missouri City.
- Note the brand and the model number. On refrigerators it is usually on a label inside the fresh-food compartment; on washers and dryers, inside the door or lid.
- Photograph any error code exactly as displayed before pressing buttons or cutting power.
- Say whether the appliance is gas or electric. For 77489 addresses, mention whether the home is inside Houston or Missouri City limits.
- If the complaint is slow ice, spotty glasses or a washer fill code, check whether the water filter or inlet hoses were changed recently.
- Know roughly when the appliance was bought. For a builder unit, the closing date on the house is a fair guess.
If the Answer Is Replace: Getting the Old One Out
Households on the city's garbage contract with GFL Environmental get bulk waste pickup every week along with trash, recycling and yard waste; the city lists a base rate of $20.31 from January 1, 2026. The city's program page doesn't spell out appliance rules, so ask GFL before setting a refrigerator or freezer at the curb. If your trash isn't collected under the city's GFL contract, put the same question to whoever does collect it.
Refrigerant is the sticking point. EPA puts the duty on the last stop in the chain, typically a scrap recycler or landfill, to make sure refrigerant is recovered before disposal, which is why haulers ask about it. Buying new? Ask the store to take the old unit away with delivery.
Before deciding, run the numbers in the repair or replace guide, and hold any quote up against HomeGuide's national ranges.
Nearby Coverage and Common Missouri City Repairs
- Stafford, ZIP 77477Next door, and served by the same WCID No. 2 that runs water for some Missouri City subdivisions.
- Sugar Land, ZIP 77478Covered in 77478 only; 77479 is not.
- Houston appliance repairThe Houston ZIPs on the list, including 77071 and the Houston side of 77489.
- Refrigerator and garage freezer repairWarm fresh-food sections, frost, clicking compressors.
Sources for This Page
- Census 2020 ZCTA to place relationship file
- Census ACS 2020 to 2024, Missouri City housing (via Census Reporter)
- City of Missouri City: MUD operators
- City of Missouri City: 2023 drinking water report, Mustang Bayou
- City of Missouri City: solid waste program
- Houston Permitting Center: fuel gas connection permit
- Texas Occupations Code ch. 1301
- EPA: safe disposal of refrigerant appliances
- LG refrigerator warranty
- Maytag 10-year limited parts warranty
Missouri City Appliance Repair Questions
Is Sienna covered for appliance repair?
If the address uses ZIP 77459, yes. Sienna straddles the city limit, and several Sienna MUDs sit in Missouri City's extraterritorial jurisdiction under partnership agreements with the city, but coverage is decided by ZIP code rather than by which government collects your taxes.
My address says Missouri City but my ZIP is 77545. Why can't I call?
The repair companies taking calls through this line cover a fixed list of ZIP codes, and 77545 isn't on it, even though about a tenth of Missouri City's land falls inside that ZIP. The ZIP checker on this page shows the current list, and any change to coverage will show up there.
Is the original washer in my 2014 house worth fixing?
It can be, if the repair is a pump, lid lock or inlet valve. HomeGuide calls a washer worth repairing when it is under 7 years old, the fix costs less than half of a new washer, or it is still under warranty. A 12-year-old machine fails the age test, so the price of the fix decides it. Check the brand's long parts warranties first; some cover motors or drums for 10 years.
Can a technician come the same day in Missouri City?
Ask when you call. Same-day visits depend on the repair company's schedule that day, so nobody can promise one in advance. Having the brand, model number and any error code ready makes the call quicker.