A neighborhood can form an association and then set up deed restrictions. I do not know governing laws in tx for this, but the reason say winlow or mandel place (two montrose subdivisions) do not have the proliferation of townhomes is that they both are heavily deed restricted. Deed restrictions can cover any number of important things, including but not limited to: 1. The type of buildings you can construct (single family, multi-family, town homes commercial) 2. The use for the property i.e. only residential, one family, no duplexes, etc or even if they canhave a single family with a home office and if so do they restrict the type of business or the number of visitors 3. Very importantly - type of construction and materials to be used i.e. 60% brick etc. which is how many neighborhoods maintain architectural cohesiveness 4. In some heavily restricted areas, even the type of landscaping is dictated You have to research the subdivision and then find the retsrictions. A good title agent can usually help a lot with that.