Cerritos ADU Construction Near the Lot Line
Cerritos ADU construction planned around eave and wall limits near the lot line, with glass and deep shade turned toward the open side of the yard.
How far an eave reaches toward the fence is a figure the Cerritos plan reviewer checks on any backyard unit set close to a side or rear line. Building code limits projections near a lot line and asks for fire-resistant construction under an eave that comes within 5 feet of it. Since deep eaves are how a glass wall gets its shade, we plan the footprint around that limit.
Eaves, walls and the line
On the tight side by the fence, a wall placed at the 4-foot cap that state law puts on side and rear setbacks leaves little room for an overhang. That wall may also need a fire-resistance rating, and its windows are limited in size or left out, depending on the exact distance. So the glass goes on the faces that look into open yard, where eaves can reach out as far as the shade calls for. The reviewer reads all of this from the site plan, which marks each wall, each projection and the line it faces.
Shade where the eave cannot reach
Near a fence, a freestanding pergola can shade a door without adding roof framing toward the line, as long as it meets its own placement rules. Low-e coatings trim the heat that gets through the glass, and the energy forms show the reviewer how the whole shell performs. A light-colored roof covering keeps the attic cooler. Rain from the shortened eave on the tight side is caught in a gutter and carried by downspout to the open side of the lot, so it never runs toward the neighbor.
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Face the glass into open yard and keep the tight side for walls with few windows. A back corner of a Cerritos lot often works, with the patio door angled clear of the bedrooms in the main house. The sewer route and the panel location then nudge the footprint before drawing starts.
Yes, if the Cerritos design keeps to a single story and a floor area of 500 square feet or less. We take extra care drawing eave depths and wall distances on the site plan, so plan check can confirm each projection against the lot lines. A two-story or larger unit is scoped after a site visit.
It can. A wide slider or folding door opens onto a paved patio on the open side of the lot, under an eave deep enough to shade the glass. Where the patio edges toward the main house, a hedge or a screen wall lets each home use its patio without looking onto the other.
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