Air Conditioning Questions, Answered for Fort Bend County

It depends entirely which side of a city line the property sits on, and the gap between the two answers is larger than most people expect. In unincorporated Fort Bend County there is no county mechanical permit and no county mechanical inspection. The county's own building-codes page states that it “has not adopted zoning ordinances and does not issue Certificates Of Occupancy,” a county verification letter confirms that it “has not adopted building codes for single family residential developments,” and its list of what does require a permit out there — floodplain work, structures or slabs of 400 sq ft or more, land development, large fill or excavation, driveways, turn lanes and right-of-way utility work — contains no mechanical trigger at all. Inside a city the answer changes: Missouri City, Needville, Meadows Place and Beasley all issue mechanical permits, and Richmond, Rosenberg, Fulshear and Simonton run permit programs too. The city-by-city position.

No, and this is settled Texas law rather than a matter of interpretation. In Town of Lakewood Village v. Bizios (Tex. 2016) the Texas Supreme Court held that a Type A general-law municipality cannot enforce its building codes or building-permit requirements in its extraterritorial jurisdiction, and in Collin County v. City of McKinney (Tex. App.—Dallas 2018) the Dallas Court of Appeals extended the reasoning: every municipality, home-rule cities included, needs legislative authorization to enforce building codes beyond its corporate limits, and none has it. Cities do keep platting authority in the ETJ, which is where most of the confusion comes from — an ETJ subdivision still goes through city plat review, so people reasonably assume the buildings are covered too.

About postal routing, yes. About jurisdiction, nothing at all. Aliana and Harvest Green carry Richmond mailing addresses and sit in unincorporated county inside Houston's ETJ. Townewest and Mission Bend carry Sugar Land and Houston addresses and are unincorporated Fort Bend County in Houston's ETJ. Cinco Ranch carries Katy addresses and is roughly ten miles from the City of Katy, in neither the city nor its ETJ. The only reliable answer is the jurisdiction of the actual parcel.

The national figure is 10 to 15 years, from a 2007 NAHB study of home component life expectancy averaged across every US climate, and Fort Bend County sits at the short end of it. The reason is runtime rather than build quality. Houston Hobby records roughly 89 days a year at or above 90°F and 27 at or above 95°F, with an average first 90°F day of 6 May and an average last of 8 October, and logged 4,099 cooling degree days in 2025. A condenser here accumulates far more compressor hours per calendar year than the same model in a four-season market. A 2012 house on original equipment is not unlucky; it is on schedule.

Because temperature and humidity are two different jobs and the thermostat only controls one of them. Air conditioning removes moisture by condensing it on a cold evaporator coil, and it does that only while running. An oversized system meets the setpoint in short bursts, so it never runs long enough to dehumidify — and EPA notes that short cycles can even allow condensed moisture to evaporate back into the air. With a mean August dew point of 73.5°F in Houston, that is very noticeable. Turning the thermostat down makes the house colder and no drier. See sizing and load calculations.

In this climate, usually worse. Oversizing is the most common Gulf Coast installation error, and EPA is blunt about why it happens: oversized units cool quickly and remove any risk of a callback about insufficient capacity. What they do not do is run long enough to control humidity, and every extra start is wear on the compressor. The right size comes from an ACCA Manual J load calculation on the actual house — which both the IRC (M1401.3) and the IECC (R403.7) require.

No. EPA published a final rule on 26 May 2026, effective 27 July 2026 (91 FR 31284), removing the installation deadline for systems whose specified components were manufactured or imported before 1 January 2025 — so even installing pre-2025 R-410A equipment remains permitted, let alone continuing to run one. The 700 GWP limit and the 1 January 2025 manufacturing cutoff both remain in force. Note two things: that reconsideration rule was challenged in the D.C. Circuit in late July 2026 and remains in effect while that is pending, and New York's own regulation still applies the original 1 January 2026 date because New York does not automatically adopt federal changes. Texas has no state refrigerant rule, so the federal position governs here. See refrigerant and system age.

Owning and running an R-22 system is not illegal and never became so. Production and import into the United States ended on 1 January 2020, so servicing depends on recovered and reclaimed stock, and EPA states plainly that it “does not require homeowners to replace their existing equipment.” What changes the economics is a refrigerant-circuit failure — a leak, a compressor, an evaporator coil — because that means buying reclaimed R-22 for a system already at least fifteen years old whose other components are the same age. A capacitor on that same system is still a repair worth making.

Yes, everywhere in Texas without exception. Air conditioning and refrigeration contracting is licensed by the Texas Department of Licensing and Regulation, and Occupations Code §1302.251 bars performing — or offering to perform — it without a license, regardless of whether the property is inside a city. What changes in unincorporated county is enforcement, not the requirement: inside a city the permit is the moment somebody checks; outside one it is complaint-driven, which in practice means after something has gone wrong. Ask for the company's TACL number and check it against TDLR's free public license search.

Because it would not be lawful for it to. Under 16 TAC §75.71(h) a contracting company must display its affiliated licensee's number in advertising, and under §75.70(f)–(g) a licensee may not allow their number to appear on a company they are not affiliated with. A referral service can hold neither its own number nor a partner's, and §75.71(c)(2) closes the workaround by providing that accepting requests, scheduling work and supervising it is expressly not enough to make a business a contracting company. The absence of a number here is the correct state of affairs. The number that matters belongs to the contractor who turns up.

Four documents, all of them ordinary deliverables. The ACCA Manual J load calculation, with your address at the top and a separate sensible and latent figure. A total external static pressure reading taken across the air handler — minutes to take, and the closest thing to independent evidence about the duct system. The commissioning numbers: charge verified by superheat or subcooling, supply and return temperatures, airflow. And the company's TACL number alongside both warranties — the manufacturer's parts warranty with its registration deadline, and the contractor's labor warranty, which is a separate document. A contractor who produces those without friction is telling you something useful.

Because the failures are caused by idleness rather than by load. Houston Hobby logged 961 heating degree days in 2025 against 4,099 cooling, so the thermal demand is genuinely small — but every system here provides heat through the same air handler and ductwork, and that half sits unused for seven or eight months. Oxide builds on the flame sensor, ignition assemblies degrade, seals stiffen, and debris and nesting material accumulate in the burner compartment and flue. None of it is detectable while the system is idle, which is why it all surfaces on the first genuinely cold night — the same night everybody else's does. The October check.

It is the one gas-furnace failure that is a health risk rather than a comfort problem. The heat exchanger separates combustion gases from the air delivered into the house, and a crack lets combustion products — carbon monoxide among them — into the supply air. EPA lists cracked furnace heat exchangers among household sources of combustion products. It cannot be seen from inside the house and carbon monoxide has no smell, which is why working CO alarms on every sleeping level matter regardless of the age of the equipment, and why the October check is the appointment that finds it.

Yes, and with an honest caveat. Fort Bend County covers roughly 885 square miles and contractor density is nothing like uniform across it. Missouri City and Stafford sit inside the Houston service area in every practical sense; Needville, Simonton, Orchard, Beasley, Kendleton and Fairchilds do not. During a July heat wave that difference is real, and this site would rather say so than promise a response time nobody can meet.

No, and it is worth flagging because it turns up constantly in copy written for this region from somewhere else. Salt-air corrosion is a Galveston and Bay Area issue; Fort Bend County is more than fifty miles inland at its closest point. The honest local failure drivers are runtime hours, humidity and condensate management. A contractor or a website leading with coastal corrosion in Fort Bend County is reading from a template.