Garden Grove, CA Building Safety: Anti-Mansionization (2026)

030(A) spells out the denial standard: if any listed criterion is not met, the plans must be denied. Two criteria drive the bulk control that functions as Garden Grove's mansionization check. First, under subsection (A)(3), the combined footprint of the primary structure, any accessory structures, driveways, and uncovered parking cannot exceed 50 percent of the total lot area, capping how much of a lot a homeowner can cover with an oversized house and hardscape. Second, subsection (A)(2) requires the roof pitch, color, material, texture, eave details, wall material, windows, and doors of any addition or accessory structure to match the primary unit, preventing a bolted-on second story that reads as a mismatched bulk addition.

For two-story construction specifically, subsection (C) requires that all new second-story windows and balconies avoid direct views into windows of adjacent dwellings and into a neighbor's side or rear recreation areas, including pools, spas, patios, and gardens. Where a direct sightline exists, the applicant must add one of four listed mitigations: raising the window sill to a minimum six-foot height above the finished floor, installing view-obscuring wing walls, using obscure, opaque, or frosted fixed non-slider glazing, or planting an evenly spaced row of screening or canopy trees tall enough to block the view, which must then be maintained in perpetuity.

Single-story rear additions get a separate carve-out in subsection (B): they may encroach up to 10 feet into the required rear yard only if a full 1,000 square feet of usable open space remains and only a single story is built at that depth. 08 for any single-family home built in the R-2 or R-3 zones as well.