ADU Construction in San Dimas
San Dimas ADUs drawn with a clear drainage path for plan review, then permitted and built by Harborstone Remodeling. Detached units and garage conversions.
Runoff is a line a San Dimas plan reviewer follows closely on an ADU set: where water from the new roof and patio travels, and whether any of it heads toward a neighbor's yard. The reviewer expects the site plan to show that water reaching the street or a dry well on your own parcel. We draw that path early, file the set, answer the comments and build what the city signs off on.
Drawing the water path for review
Every downspout gets a spot on the site plan, along with the buried pipe it feeds and the point where that pipe lets go. A reviewer checks that each outlet sits far enough from both foundations and that new paving does not tip water toward the property line. Where a flat yard offers no natural fall, a gravel-filled pit wrapped in filter fabric can take the flow, sized to the roof it serves. If the lot slopes, a shallow swale along the low edge may carry overflow out to the curb. We set the finished ground around the slab and walks so it falls away from every wall, and the inspector confirms the built work matches.
Walls and roof for dry heat and sudden rain
On an inland lot, a small building takes strong sun for long stretches, dry gusty spells, and every so often a storm that dumps heavy rain in a hurry. We specify a light-colored roof covering with self-adhered underlayment lining the eaves and valleys, gutters sized for a heavy burst, and fiber cement or 3-coat stucco over a housewrap that leaves a gap for water to escape. Windows sit in sloped pans taped into that wrap, and low-e glass trims heat gain on the sunniest walls. Insulation is chosen to meet the energy rules, and attic vents let built-up heat escape. Our written quote puts the permit fees on one line and the construction on another, each apart from the drawings.
ADU Construction in San Dimas: questions
Your survey is the starting sheet. We mark off the required distances from the back and side lines and from the house, and the open patch left is the working area. On a deep San Dimas parcel, a detached cottage may fit in the back. A shallower yard leans toward an attached unit or converting the garage. The drainage pipe's route to the street also nudges where the footprint lands.
A San Dimas reviewer reads drainage off the site plan, so ours marks each downspout, the pipe runs, the dry well and the finished ground levels around the slab. That sheet belongs to a set we draw for a one-level ADU of 500 square feet or less. We submit it to the city and respond to each plan check comment until it clears.
With a sound, level slab, straight framing and height for a finished ceiling, it can. We test those first and show you what we find. A San Dimas conversion may also need the old driveway apron reworked where the car door is walled in, so rain off that new wall runs away from the slab edge, and the site plan shows how.
More we do in San Dimas
Talk to us about your San Dimas project
Ask for a written quote or a call back. If photos would help, we ask for them when we reply.