I'm Doug, and I'm very sorry to hear of your situation. My goal is to provide you with excellent service today.
While I presume that what you are looking for is some way to force the HOA to allow you to build your structure in defiance of the By-laws/CC&R's, the fact is that short of forcing an amendment to the By-Laws, you won't be able to do that---or to convince a court to do that. Your only remedy is to deal with the present violations that the HOA is doing nothing about.
I will presume that the neighbors failed to get the permission of the HOA to make these changes you reported on other properties in the neighborhood.
Your first avenue of approach will be to file a formal complaint with the HOA board, and ask that they find the construction of outbuildings on HOA property a violation of the By-laws and immediately take measures to remove the offending structures, that they sanction the homeowner for the violation and that they immediately take action to sanction the owners involved and to lien their property if necessary.
Failing that you may institute a private suit against the owner and seek the help of the court to enforce the covenants of the HOA as you have a legal interest in seeing that they are upheld. The court can then order that the structure be removed or some made to conform to the HOA covenants in place.
The last option that you have, and I say last because it is likely to be the most expensive, is to actually file suit against the Board itself for failing to enforce the covenants. The allegation in the Complaint will read something like this:
As a result of the intentional failure of the Association to enforce the declarations and the guidelines and discharge its duties, as a result of the association’s failure to act, and as a result of the association’s defective and negligent performance, the (insert your associations name here) community has been degraded.
These sorts of suits have been successful in courts across the US.
You may reply back to me using the Reply link and I will be happy to continue to assist you until I am able to address your concerns, to your satisfaction.
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I wish you and yours the best in 2015,