ADU Construction in San Marino, Distances Checked First
San Marino ADUs drawn to the lot line and house distances the city reviewer checks, with window placement and a kitchen fitted inside the footprint left over.
Measured gaps decide much of how a San Marino ADU set fares at the city's building department: wall to side lot line, wall to rear lot line, and unit to main house. State ADU law lets a detached unit stand 4 feet from a side or rear line, and a wall that close may need a fire rating with limits on its openings. We fix those distances first, then draw the kitchen into the footprint they leave.
Where the windows can go
A wall near a lot line carries less glass, so the kitchen window moves to a wall that faces the yard or the main house. That choice also gives the sink a view into the garden and keeps the neighbor's fence out of the frame. Bedroom windows still have to meet the size for emergency escape, which can steer the bedroom to a wall with space in front of it. The site plan marks every opening against its distance to the line, and the reviewer checks the rated walls against those distances before signing off.
Attached to the house on a shallow yard
If the rear yard is too shallow for a detached unit, an attached one can join the side or back of the house. The reviewer then looks at the shared wall, which needs a fire-rated assembly, and at an exterior door that leads into the unit without passing through the main home. State law ties the size of an attached unit to the floor area of the house, within set limits. Kitchen plumbing can tie into the house lines through the shared wall, keeping runs short, while matching roof and siding make the addition read as part of the house.
ADU Construction in San Marino: questions to settle first
Inside a studio footprint the sink, range, refrigerator and dishwasher line up on one wall. With a bedroom added, the footprint grows enough to bend the counter into an L and add a peninsula. Appliances go onto the floor plan at actual size, which settles the space in front of the oven and the swing of the refrigerator door before framing.
San Marino review turns mostly on the site plan, where every distance to the lot lines and the main house is dimensioned, and for an attached unit on the floor plan showing the rated shared wall. We prepare those sheets with the remainder of the set, file the package and answer each correction.
A buried feeder from the main panel powers the unit when a load calculation shows room, and a second meter serves it when the panel is full. Waste drains through a new cleanout into the house sewer line or out to the public sewer, and water branches off the house supply with its own shutoff.
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Describe the space and the change you want. We reply with what the first visit covers.