Sometimes, you can get entangled in the legal mess when they deviate from the plans and do something stupid.

Yup. If the design fails because the GC changed things you have to prove they did so without consulting with you. A real pain in the . . .

https://content.aia.org/sites/default/files/2016-04/StateXStateLawMatrix-Practice-of-Architecture-Definition.pdf

"The practice of architecture within the meaning and intent of this Act includes the offering or furnishing of professional services, such as consultation, environmental analysis, feasibility studies, programming, planning, aesthetic and structural design, technical submissions consisting of drawings and specifications and other documents required in the construction process, administration of construction contracts, project representation, and construction management, in connection with the construction of any private or public building, building structure, building project, or addition to or alteration or restoration thereof" 

Technical submissions are the designs, drawings, and specifications that which establish the scope of the  architecture to be constructed, the standard of quality for materials, workmanship, equipment, and construction systems, and the studies and other technical reports and calculations prepared in the course of the practice of architecture.

Go read the illinois practice act, my friend.

Pete, many rural areas have no building codes at all, including most of Maine where I live. That's about to change here, with statewide compliance required but not enforced. I don't know about other places.

Building codes adopted at the state level frequently percolate down to everyone, depending on state law. Knowledge of that is required for a professional. The fact that OP doesn't know means they're likely unprepared to be offering professional services.

I am not a lawyer. :)

I spend too much time answering questions at greenbuildingadvisor.com, where people who can't afford architects (or don't want to pay for them) often go for free advice. I've been surprised at how many places have no enforcement at all. I agree that if you have to ask the question you're probably not prepared to do the work.

An interesting seemingly gray area when a state has building codes and the local jurisdiction has no method or intention of checking on or enforcing them.

I did a project in a rural area recently. No permit. Followed the state building code. Tax assessor stopped by to check it out, but no building official. It is the easiest type of work you can do.

Seems like one of those places in human existence that works perfectly until someone gets physically hurt or damaged financially, then the lawyers come at you with nukes.

They come at you no matter what.

SneakyPete is right about knowing the rules like codes. It doesn't matter if the OP is licensed or not. If you are a professional, be it licensed as an architect or otherwise, knowing the codes is one of them and designing to a reasonably safe standard (meeting state building codes at the very least) even if there isn't outright building codes enforced as you may be subject to liability to such projects.

 In Oregon, you are subject to liability for the period of statutes of repose and one needs not be licensed as an architect or engineer or as a construction contractor to be held liable. I think that law is fair and reasonable.

If there isn't any outright building codes, meeting the unamended I-code standards at the very least would be better than not designing to any standard.

Hey SillyBilly, why the thumbs-down? Maybe my description of Green Building Advisor wasn't accurate--it's a popular place for homeowners and professionals alike to ask questions about building science, with other questions about building codes, sustainability, design, construction, etc.. I've been involved with the organization since before they launched so I spend a lot of time there answering peoples' questions--often pros', and both pros and homeowners often email me questions directly. I have studied building codes extensively so I often answer those questions. As part of that experience, I have learned how many places don't have code enforcement or code requirements at all.

"...because of the shady nature of people asking for help (avoiding obtaining permits, assuring me it's a quick job, and having an audacity to tell me that they'll do what they want anyway and won't follow my plans)." 

Perfect reasons to say NO to such clients because they put you in trouble and if their is a flaw, they'll be suing you and the contractor and causing you trouble and even not pay you. More trouble than they are worth.

Of course with the argument of 'once health, safety of occupants is in questions"..... it is always in question. If you aren't competent to do anything without someone licensed to perform the services, you might as well not even offer services at all. If you are going to offer ANY service, you have to be competent to deliver the services you offer or you don't do the project and leave it to someone that is to do the services. 

In other words, get the *bleep* out of the business of offering any services relating to designing any structure of any size from a birdhouse to any size you can imagine. If you can't perform the services of those not legally required to be designed by a licensed architect or engineer then you don't belong in the business of designing structures as an independent practice. 

While it is true that there are some places in the U.S. where there is no exemption for a person to design buildings independent of an architect/engineer, in most states it is. However, just because something is exempt in a state like houses in most states, you need to be competent to perform those services. You should be competent enough to design houses that are of conventional construction. 

Now, that is not to say you need to be competent to design some odd roof design of non-conventional construction requiring advanced engineering or other such situations where the design requirements exceed your area of competence but that doesn't mean you can't do the parts you are competent in. In which case, you augment your knowledge & skillset with an individual(s) that have competency in the knowledge & skill set you don't have and form a project team that can deliver the project. In which case, someone who is licensed such as an engineer may be needed in such a project, such as a structural engineer. There may be the possibility of needing engineers in other disciplines. 

In any case, if you are a professional (licensed or unlicensed), you are responsible for your actions and the services you provide. You can mitigate your scope of responsibility and liability. The only way you are not liable or legally responsible is if you are not offering or performing any service to any client OR you are an unlicensed person working purely as an employee of your employer in which case licensed individuals and the owners of the business that employs you as an employee would be responsible and liable.

Restarted the computer and the browser reopened. Very short, if you represent yourself as an architect, what hienguyen said is correct because under law, if you represent yourself as an Architect offering architectural service and you do not have a license, committed fraud and per consumer protection laws, clients/customers do not have to pay for something because they were defrauded. In other words, criminals are not to be rewarded. If you were explicit in not using the architect title by using a title you are legally authorized to use because it is not regulated or restricted and offers services that do not require licensure, a judge may not close the case the way hienguyen said. "Building design" is a lawful occupation in most states. It is not consumer fraud and deception. Using the architect title and offering architectural services where a license is required while not possessing a license is unlawful.