answer:Houston Zone Code: Residential Section 9: ... Unit divisions: ... Shared fences or other structures dividing the property line shall not be altered in such a way that it impacts other residents without permit pursuant to section 29.a (Guidelines for Alterations). This includes physical alterations and additions, changes to color, and inserting a privacy barrier whether it be natural or artificial. Resident’s may install their own privacy barrier, but may not alter the dividing structure. Google it, I closed the window.