866 sq ft ADU Plan – Permit Ready

Delivered as a permit-ready architectural plan set, this 866 sq ft single-story ADU configures 1 bedroom and 1 bath for California parcels eligible under the state's detached-ADU statute.

Architectural deliverables include the floor plan, four-sided exterior elevations, building cross-sections, and dimensioned framing intent for the roof and floor systems. The design is developed against the current California Residential Code (CRC) with structural detailing intended to follow ASCE 7 and the NDS for wood members.

Specific structural details — wall framing, sheathing, shear-wall locations, holdown selection, and connection design — are delivered through the optional Structural Set package and sized to the seismic site class and wind exposure of the specific parcel.

The foundation system is selected during a separate site-specific design scope. Slab-on-grade is the default for level, well-drained parcels; raised crawl-space on continuous stem walls is the choice on expansive-clay or high-moisture sites; pier-and-grade-beam systems handle hillside lots and soft-soil regions where the geotechnical report calls for deeper bearing.

The plan's 14.5 ft ridge height fits within California's standard 16-foot detached-ADU height limit on any standard parcel — no special transit or zoning eligibility required. Side and rear setbacks of 4 feet are respected, and the plan is designed for ministerial review under §65852.2. For sites with stricter local height overlays (HOAs, hillside districts), plan customization is available to lower the ridge further if needed.

Optional add-on services include PE-stamped structural calculations, plan customization (roof slope adjustments, elevation revisions, layout modifications), custom foundation design tailored to the soils report, on-site structural observation during construction, and permit support for jurisdictions with non-standard plan-check comments.