That said, having lived in Washington State nearly my entire life, I have never had any mold grow in a home where I've lived, except on bread in the cupboard. With proper heating and ventilation, mold will not be a problem, here or anywhere else.
If you're seeing problem levels of mold in every property, that would be very suspect.
I am going to take a different tact here. I have lived in 6 states and only practiced real estate here, but for what it is worth, yes, there is more mold here then in other places.
Having said that, let me explain. First of all I am allergic to mold. I didn't realize this until I moved to Seattle and started poking around in crawl spaces and attics of homes for sale.
Mold spores are everywhere. You are breathing them in right now as a matter of fact. They become a problem when they are allowed to take root in places that have poor ventilation. Given the amount of moisture we have here in Seattle, and the relatively mild climate, we have more of an issue then most places.
If a house is appropriately ventilated however it should not be an issue. If it does become an issue, then mold abatement is much easier of a process then I thought.
The key is having a great inspection done at the time of purchase to make sure there isn't any mold currently and to make sure that the situations that lead to mold are not present so you can rest easy at night moving forward.
Just my thoughts.
All the Best
Dave & Lisa
A house with mold is always a problem. No matter what type of mold you have, it's an indication of too much moisture in the structure and the source of the problem should be discovered and repaired.
Mold growth is common in any enclosed, moist space. Hire a professional home inspector qualified to check for mold and pests to identify any locations in the home where mold (and dryrot) may have begun to grow in the home. Common locations are bathrooms, kitchens, laundry areas, the bottoms of walls in basements and around any leaks in the roof or exterior walls of the structure.
Wood, insulation and drywall that have been soaked for any reason may not dry out fast enough to avoid becoming a growing medium for everpresent mold spores. If mold growth is detected, usually there is a leak or other moisture source that must be cured and then all of the affected mold substrate (drywall...etc.) should be replaced. Localized surface growth can often be kept under control with bleach and proper venting will prevent initial mold growth in higher risk locations, but if you have specific concern, contact a specialist before the problem gets worse.