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Nobody knows the age of their condenser off the top of their head. The year the house was finished is the closest free stand-in, so these areas are grouped that way. What changes with it is not just the equipment — it is how many hours a season the system runs, where the air handler sits, and whether the condensate has anywhere good to go.
Houses finished before about 1983. The equipment has been changed out two or three times, the duct runs are usually older than whatever is attached to them, and the drain arrangement above the ceiling is the oldest part of the whole assembly.
Late 1950s–60s
Cooling was often added later to houses that were never laid out around ducted air, which is why the returns are undersized so often here. Rebuilding has been heavy enough that a 2021 house can share a fence with a 1958 one.
1972–83
Large two-story homes where the air handler sits directly over a finished second-floor ceiling — the arrangement that turns a blocked drain line into a ceiling repair. The county’s first master-planned community, under a mature live oak canopy.
87.1% built 1970–99
Two construction generations share the one name, so configuration and equipment age move street by street here instead of settling across the whole area.
1979–93
Bigger footprints on estate and lakefront lots, often carrying two systems per house. Closer to the water the humidity load is heavier, which shows up as a house that reads cool and still feels damp.
These streets were built out across two decades and mostly re-equipped in the 2000s. That second system is the one now arriving at the end of its own service life, usually all at once across a street.
1977–2000
Some 10,000 acres and upwards of fifty neighborhoods — more aging attic equipment in one place than anywhere else nearby. It is also where a rusted-through secondary pan turns up most often, usually discovered by the stain rather than by anyone looking.
1987–96
Everything went up inside nine years, so changeouts arrive in waves and the furnace faults that hid all summer surface here on the same few cold mornings.
Opened 1989, built through the 1990s
The City took this in on December 12, 2017. Anything replaced before that date was permitted elsewhere or not at all, so an empty City record on an older changeout is not evidence of anything.
1989–2008
Nineteen years separate the earliest houses from the latest, so two equipment generations sit under a single name. Came into the City on the same December 2017 date.
Newer streets, where the coil, the condenser, the furnace and the drain pan all went in the same week and are now wearing out on the same schedule. These are also the addresses where who issues the permit is a real question.
1999–2005
Estate and lakefront lots close to Town Square. The original equipment is past the ten-to-fifteen-year window by now, which is true whether or not it started this morning.
Opened 2006
The land came into the City in 2004, before a spade went in, so there is no split permit history to untangle. First changeouts are landing now, with every component the same age as every other.
2007–2020
Largely unincorporated county, with the Sugar Land and Missouri City ETJs running through it. Two houses on facing sides of one street can answer the permit question differently.
2000s onward
Missouri City addresses, whatever the postal mail suggests. The attic runs just as hot and the season is just as long — but the paperwork goes to a different counter.
Coverage runs past the twelve. Missouri City, Stafford, Richmond, Rosenberg and Meadows Place are all in it, along with the unincorporated pockets between them — Lake Pointe, Imperial, Sweetwater, Townewest. Lake Pointe earns its own mention here: its first phases date from roughly 2005 to 2008, putting it on the same first-changeout schedule as Telfair.
Two of those are worth a footnote. A Sugar Land mailing address reaches Townewest and Mission Bend, but neither sits inside the city limits. Nothing about the work changes; only the question of who would inspect it does — the same wrinkle described above for Riverstone.
An unlisted street is not an uncovered one. The edge of the county is the edge of the map here, not the edge of the city.
The street name will place the address. The year the house was finished will usually place the equipment too, which is the more useful half of the answer.
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Sugar Land