The Main Problem is that we allow the government to control the land that we paid for and continue to pay taxes on.

The Constitution does require them to pay us for the rights that they Take, but the legislature and regulatory agencies generally forget this.

Bob Crane nailed this one!

 You will have no problems as long as you follow the ordinances ...

I honestly don't know but I think as an agent for us it would be disclosure or lack thereof. 

When the boundary lines change, like when they put up a fence in the wrong place, or have a shed half on the right property.

Kyle Fowers - well, Bob Crane nailed it!

These are things that attorneys tend to deal with - it's above an agent's pay grade. You need to know enough about to tell the buyers to talk to a lawyer first.

I would say the government is the main problem

Mazimizing land use can upset the adjoining property owners. Also getting utilities to the subject properties can be very expensive and hard to do.

All areas are going to have their own land use codes and ordinances. As you start getting familar with different areas, you will learn the codes and what you have to do. Checking with the local governments will also give you a lot of information. 

Assumptions.

"Oh, we can get that zoning changed after the purchase."

"Oh, I sure you can do that."

"I see no problem with moving the in-laws into the converted carriage house."

Government. Politics. Dirty Politicking ... tons of BS to deal with. 

Changing ordnances and regulations in the town, and lack of knowledg about what they are. Controllling growth is an issue in our area

You should have no problems when you are familiar with the guidelines in your community.

Mostly when an investor want to build multi family and the property is zoned SFR.

I would think that the rules are always changing and checking with the government agencies would help address any potential problems.

the greatest problem with town boards would be their effort to control growth...

you have no control. 2. the rules change. a lot. 3. the rules differ from person to person and day to day

Rezoning in conservative government is out of question. Many parcels can not be built 20 ac or less just 1 dwelling...

Kyle Fowers Potential problems can be minimized if you are thoroughly familiar with your Comprehensive/Master Plan and local zoning ordinances and districts. Attend planning meetings to stay on top of local issues.

Study hard.  Take lots of practice tests.  Good luck with your license examination.  

Owners not obtaining approval/permits

Not having a competent attorney to guide the process!

First and foremost is dealing with the town, department of environmental management & our coastal resource state division on requirements.  I don't imagine Utah has the water issues or groundwater issue restrictions we have here but your town planner can be a great guider here.

Following the guidelines of the community; none.

It is the people with no money invested thinking they can control or make changes!

Your broker will guide you.

Appeals to the OMB can solve or create issues depending on your viewpoint.

Welcome to the Rain. 

p.s. of course, it is for Utah, seems it is quite a popular question in there. 

I have no idea... I don't get involved in these issues.

Kyle, I don't understand the question...planning and zoning are not functions of an agent, here they are controlled by the municipality.

Every deal is different.  There is no way to catagorize every deal and problem and area into one answer.