How do i get paid for construction work already done.

File a mechanics lien. The is the best, cheapest, and highest impact option.

Construction contract lien?

As explained by my colleagues, preliminary notice was not likely required here, which means you do have a lien right. Now, how to use it? 1. ...

Can I put a mechanics lien on property without a signed contract?

Generally, the answer here is yes. Check out articles that discuss the nuances here: http://www.zlien.com/articles/tag/oral-contract/

As a hvac contractor, if I perform work and the owner pays me, but his check does not clear or (s)he stops payment,

The answer is yes. The question you'll have to work out is whether it is worth it for a $210 repair. Personally, I believe it is always worth...

Can a mechanics lien attach more than one property at a time.

In general, the answer is no here. Only some states have a clear exception to this rule, such as in California, where it is possible to file one...

If I don't have a written and signed Contract between my GC and myself (builder-owner) can GC still file a Mech Lien. State: CA

Regarding (a), the contract is not necessary to file a mechanics lien. See more information on this questions...

Other than the amount of my invoice I am requesting can any cost be recovered in the lien process, to include filing etc.,?

Here is the answer to your question about which fees and costs can be included in your mechanics lien amount in Florida, taken from the following...

Here is an article about the decision of whether to go to small claims court or pursue a mechanics...

Is this a project in Colorado, as your question suggests, or Louisiana, as the question is tagged? Both states, interestingly enough, have a 10...

HOW CAN YOUR PROVE OR DISPROVE ACTUAL DELIVERY OF NOTICE TO OWNER FOR A CONSTRUCTION LIEN

I agree with David here. The sub should have some proof of sending the notice, and then everyone who was supposed to receive it would have to...