Gardena ADU Construction, Starting at the Property Line
Gardena ADU construction that begins by finding the true property corners, so a unit behind an older house is set back from the real line.
Our first measurement on a Gardena lot is the property line itself. A backyard fence can stand a little off the boundary it seems to mark, and every setback a new unit has to keep is counted from the line. So we look for the corner markers a surveyor once set, and if they are gone, a licensed land surveyor sets new ones before the unit is placed beside the older house.
Why a few inches can matter
State law lets a detached unit stand as close as 4 feet to a side or rear lot line, and a city cannot demand a deeper side or rear setback for an ADU. At that distance there is little room for error. If the fence leans into the neighbor's yard, a unit laid out from it could land too close and be caught when the inspector checks the footing trenches. If it leans the other way, the yard is larger than it looks, and the unit can grow by the same margin. A survey settles it before any drawing goes to the city.
Corner markers and the older house
Survey markers are small things: an iron pipe in the dirt, a nail and tag in a curb or walk, a brass disk set in concrete. On an older lot some have been paved over or pulled out along with a fence post. Working from the recorded map, the surveyor replaces any missing corner and can stake the outline of the unit too. The same visit shows how far the main house stands from each line, which counts if its porch or a bay already sits near one. The house stays as it is, and the unit fits the room that remains.
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The main panel comes first: we read its rating and list what the older house already runs on it. The unit's heat pump, cooktop and water heater are added on paper, and the total shows whether the old service holds or a bigger one is needed. Water and sewer are checked during that visit too, with a gauge on a hose bib and a camera down the lateral.
It can, when its walls and slab are worth keeping. A converted garage keeps the spot it already occupies, so its distance from the line counts for less than it would for a new building, though the survey still records where it stands. After that it needs what any home needs: insulation, a sealed floor, a footing under each wall and an escape window in the bedroom.
We copy what the street already sees on the main house. The unit takes the same roof pitch and eave depth, siding laid with a matching exposure or stucco troweled to the house's own finish, and windows divided the way the originals are. Trim boards are cut to the widths measured on the house, and the paint follows its body and trim colors.
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