Wilson Plumbing, Heating & A/C
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|Business Categories||Cooling, Heating, HVAC, Plumbing in Dallas, TX|
The question is great for some industries and non-applicable for others. A general contractor, for example, will by definition employ subcontractors. Most Dallas Cooling companies do not, but there are exceptions. You should always ask this question to your service providers. If they do use subcontractors, ask if they're all licensed and insured independently.
This is very important, since an estimate is just that. Many contractors will submit a "paper estimate", meaning they've written the estimate down on paper. The bill is the true amount owed and will almost always say "Invoice" or "Bill" at the top of the page. The bill should also list the date it was issued, the due date of payment, and a list of services rendered.
This really only matters if you have a preference, but it is good to ask. If you have a strong ideological belief about unions or nonunions, it's perfectly acceptable to make a decision based on the preference.
Some companies may require a 10% deposit, some may not require any. For larger projects, you'll almost always need to give a deposit, and it's good to ask how much the deposit will be before going forward with a project. The Dallas contractor will know how much they need for a deposit when they've given you the estimate, so ask early.