This answer has to do with why owners of anything be it a computer or a condo are treated differently than those that don't own such items. This answer looks at your question from the view of currency. In this case that's the US Dollar.
You started with this:
I currently live in a condo in the state of Washington. This makes me a minority as 67.2% of voters live in single family homes.
If I'm reading that right, that means that only 32.8% of the population is well-off enough/rich enough to own or live in a condominium, and you happen to be one of those thirty-three percenters. Your question hints at taxation, and tax breaks, and secondarily voting.
The majority in the state government gets to pass laws governing condos and each year there's more and more regulations on their construction and management.
Regulations create oversight, oversight creates government jobs. Government workers are paid with your tax dollars, and then their pay gets taxed again, and the cycle continues. In short, regulations create oversight and oversight creates higher revenue, and the more revenue that's created generates more taxes. I'll use your elevator and a plumber as examples:
- Both the plumber and the elevator repairman go to a respective trade school or apprentice program, therefore they paid that school tuition or the licensed person must pay them a salary while training
- The Tuition is paid to the school but the school must follow the regulations set out to them(Education Boards/Commissions etc). The apprentice plumber's employer, along with the elevator technician's now has to pay payroll taxes, social security and others to put the employees in good standing with the state
- At some point in their career in order to advance, both the plumber and elevator tech will have to obtain valid licensing from the state to advance.
All those fees in this example go to the state's coffer's to be spent either by the respective agencies or indirectly somewhere else in the government sector. Here's where the issue arises:
Hmmm, we don't have enough revenue coming in to support the stuff we need to do at the State Board of Plumber Regulations or the Elevator Regulatory Committee! What are we going to do???
The answer is more regulation, i.e. the above cycle is going to repeat itself. Continuing my example:
- Hmm, what can we regulate for the plumbers that will increase revenue. Well for starters we can stipulate that any toilet that costs above $300 needs all gold fittings. For the elevator board we'll add any building more than 5 stories tall needs at least 3 shafts and if it's above 10, we can make the elevator fancy (We'll decorate the inside with gold trim).
Now we're back at the condo owners:
- Where can we put, or who will buy a toilet over $300,
- What kinds of buildings have at least 5 floors, and some maybe 10?
- If you haven't guessed it, it's new construction and condos, and now we need regulators to make sure all the ones we just added are observed, and the cycle repeats again.
The repeating cycles are what's raising costs. The reason the state government picks on your sector is because that's where the most money can be gained from. If not, do you think it would be fair to tax a single family (through regulations or otherwise) when they are having trouble paying for what they need or borrowing etc. in the form of food stamps or other assistance?