The Danbury Zoning Commission has signed off on a rehabilitation hospital to be located on the City's westside.  Encompass Health is looking to construct the 36 million dollar, 100-thousand-square-foot facility near the front gate of The Summit, located in the residential development called The Reserve.  The Danbury Planning Department has to review design plans.  Encompass Health plans to buy 13 acres on Reserve Road and build into the hillside, with two retaining walls.  The Alabama-based company says Connecticut is one of the most under-bedded for inpatient rehab hospitals in the country.  The state Department of Health still must issue a certificate of need.  Encompass Health told City officials that this facility would serve people who have suffered strokes, heart attacks, and neurological ailments, offering physical rehabilitation, occupational therapy, and speech therapy.