With construction-ready drafting expertise dating to 1990, Filipponi Design Drafting produces residential plan sets from its University Avenue suite in La Mesa for the east county building community. The studio generates foundation layouts, roof-framing details, and full structural-detail sheets that general contractors including AB Construction & Engineering carry directly to the La Mesa building department for permit review. Specializations include accessory dwelling unit plans compliant with California's SB 9 lot-split provisions, two-story addition designs, and duplex conversions that maximize buildable square footage within existing setback envelopes. Structural detailing for those projects coordinates with landscape site-plan integration at Beaudry Garden Design, ensuring grading, drainage, and hardscape elements align with the architectural footprint before permit submittal. Highest-complexity deliverables include full structural-detail sheets with hold-down schedules, shear-wall nailing patterns, and engineered beam-callout specifications for two-story additions exceeding 1,200 square feet of new living space.