ADU Construction in San Pedro
San Pedro ADUs and garage conversions with roofs, gutters and flashing drawn for wind-driven rain and salt air, filed with Los Angeles and built to the set.
The roof edge of a San Pedro ADU takes the worst of the weather, since wind off the water can push rain sideways under shingles and up behind trim. We draw that edge first: a self-adhered membrane along every eave and rake, a metal drip edge, and gutters on stainless hangers sized to the roof they drain. Where each downspout lets out is fixed on paper too. Los Angeles city plan checkers review the set, and we build what they approve.
Eaves, gutters and where the water ends up
A simple gable or shed with few valleys gives rain fewer places to pool or back up. Where an attached unit meets a taller house wall, a kick-out flashing at the bottom of the step flashing turns water into the gutter so it cannot run down the siding. Gutter outlets drop into downspouts with sealed joints, and each one empties onto a splash block, into a planting bed or through a solid pipe carried past the footing, depending on what the yard and the city allow. Grading around the slab should fall away from the walls, so a long rain soaks into soil well clear of the sill.
Coastal review, the shell and the quote
The City of Los Angeles handles review of a San Pedro backyard unit and checks how far the walls sit from each property line, the height, and the way new utility lines tie in. Your parcel may or may not lie within the coastal zone. One inside it can need its own coastal permit or an exemption before building permit review begins, so we confirm that early. Damp, salty air corrodes plain steel, so we use stainless or thickly coated connectors and fasteners. We open up what we can and show you before recommending anything. The plans carry their own price in the written quote, with any city permit fees listed apart.
ADU Construction in San Pedro: questions
It is geometry once the rules apply. Pull the side and rear setbacks in from the lot lines, keep the spacing the code asks for between the new unit and the house, and the shape that is left is where it can go. A deep San Pedro parcel can take a freestanding unit, and a narrow one might work better with a unit joined to the house.
It is written for a San Pedro unit on a single floor with no more than 500 square feet inside. We take extra care with the exterior wall drawings, where every gutter outlet, downspout and eave flashing gets drawn, and with the site plan, which tells Los Angeles reviewers where that roof water is carried once it reaches the ground.
Many garages can, provided the slab is level and dry and the framing is sound. We look at the roof sheathing and trace where its runoff falls, because water off a garage roof sometimes heads for the big door, which the conversion closes in with a wall. New insulation, a window and a bathroom vent follow once the shell checks out.
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Talk to us about your San Pedro project
Ask for a written quote or a call back. If photos would help, we ask for them when we reply.

