Well, what's your property like currently? Are you allowed to raise your fence? Do you have a patio/porch with free space to sneak a few hens under (a few BYC'ers have done that), do you have a basement? Can you build a shed? Does the HOA dictate what kind of plants you can grow and proximity to structures? Could you sneak a small tractor in somewhere?
Or could you do the basement pop door into what looks like a tool bin? (when I say tool bin I am thinking one of these...http://www.amazon.com/dp/B002RDD2ZI...e=asn&creative=395093&creativeASIN=B002RDD2ZI you might get free or real cheap on craigslist. Remove the roof panels and replace with clear corrugated roofing. Cut the front doors so you can open to top half of the doors for more air inside, But no one can see the hens inside. Add a layer of screen so that they can't get out, make sure you can get inside to keep it clean and stocked with goodies to occupy the girls.)
Or could you do the basement pop door into what looks like a tool bin? (when I say tool bin I am thinking one of these...http://www.amazon.com/dp/B002RDD2ZI...e=asn&creative=395093&creativeASIN=B002RDD2ZI you might get free or real cheap on craigslist. Remove the roof panels and replace with clear corrugated roofing. Cut the front doors so you can open to top half of the doors for more air inside, But no one can see the hens inside. Add a layer of screen so that they can't get out, make sure you can get inside to keep it clean and stocked with goodies to occupy the girls.)