The owners of this challenging steep hillside property asked for an accessible 5000 sq. ft. home. Sky Canyon is a project that exemplifies WLFA’s hillside design work. We took the 8 acre site, averaging 45% grades with views of the Tucson Valley and carved out the only 1/2 acre portion with a workable 23% grade. Adding to the design program was a negative edge pool and a two-stage sand filter waste disposal system with 300 feet of drip disposal line used for irrigation. The exterior walls were constructed from 12” thick structurally insulated panels (SIPs). The home is heated with a solar sourced radiant floor slab, and the pool is heated with solar coils placed on the roof top. All landscaping is arid region compatible and drip irrigated with treated affluent.