The water history a Hollywood sample is read against
Hollywood sits inside the footprint of the April 2023 rainfall event, the one that put 25.91 inches on this coastline in 24 hours against a previous record of 14.59 set in 1979. That matters here for a specific reason: the older eastern parts of the city sit on a street grid laid out long before modern stormwater design, so water that arrives faster than the system can take it stands rather than drains. Add the ordinary wet season, 47.27 of the 66.52 inches this coast averages arriving between May and October, and a good share of the calls we take in Hollywood are about a building that took water once and was dried in a hurry.
That context is why the outdoor control sample is not optional here. A laboratory can tell you that a cubic metre of your air held a particular number of spores, and on its own that number is unusable, because outdoor air across Broward carries a heavy background load in every month of the year and a building is mostly breathing it.
So every job in Hollywood starts with a cassette run in the outdoor air at the property, in the same hour, before any indoor sample is taken. Two things come out of the comparison. Count, where indoor air substantially above the outdoor air it is drawn from points at an indoor source. And species mix, which is usually the more useful of the two: when an indoor sample carries a genus the outdoor control barely registers, that difference is the finding even if the totals look ordinary.
Two limits go in the report rather than being left for you to discover. Sampling is a snapshot of one hour on one day, and a cooling system that has just cycled reads differently from one that has been off. And there is no federal or Florida numerical standard for indoor mold, so no laboratory can issue a pass or a fail. Anyone quoting a legal limit is quoting their own policy.
The commercial position in Hollywood is the one published on every page of this site, because the rate card is not a Fort Lauderdale rate card. A flat price by property size, agreed before anyone drives out, with the accredited laboratory fee already inside it. It does not rise if the samples come back positive, nothing is added for the drive, and we take no payment of any kind from anyone who removes mold.

What Hollywood itself changes
The buildings in Hollywood
Hollywood has a median build year of 1969 across 72,843 housing units, which places most of the city in the first generation of Florida housing designed around central air conditioning from the outset rather than having it retrofitted later. That sounds like an advantage and it cuts both ways. These houses were designed to be cooled, so the envelope is tighter than the pre-war stock further south, but they were designed to a 1960s understanding of it: ducts sized generously, equipment specified by rule of thumb, and very little attention paid to what happens to humidity when the machine is satisfied early. Forty-three per cent of the stock is single-family detached and another 19% sits in buildings of fifty units or more, so the city carries both the single-storey slab house and the mid-century beachside block, and those two fail in completely different ways.
Where it hides in these buildings
The 1960s single-storey stock here puts almost everything that matters out of sight in two places. The first is the attic, where the air handler frequently sits along with duct runs that were insulated to the standard of the day and have had sixty years to compress, slip or split. The second is the slab edge, where a terrazzo or tiled floor meets an exterior block wall, which on a house of this era has no capillary break worth the name. Growth at a wall base behind furniture is the commonest Hollywood finding and it is invisible until something is moved.
The cooling systems here
Original ductwork is the defining piece of equipment in Hollywood, because the cooling has been replaced two or three times since 1969 and the duct almost never has. What that produces is a modern, efficient condenser and air handler blowing into a distribution system designed for a different machine, with insulation that has aged out and joints that have opened. In the beachside blocks the picture is different again: through-wall and packaged terminal units serving one room each, with no whole-house dehumidification anywhere in the building and a wall sleeve detailed half a century ago.