ADU Construction in Covina, Sited by the Service Panel
Covina ADUs sited by the electrical panel and gas meter, with feeder conduit sleeved through the slab and the rebar bonded before the pour.
The service panel on a Covina house tells us early where a backyard unit can sit. Its rating and spare breaker space decide whether the unit runs off a subpanel fed from the house or needs its own meter, and the farther the unit sits from that panel, the heavier the feeder wire has to be. A short trench along a side yard can set the footprint before the floor plan does.
Trench, footing and feeder
Conduit for the feeder sits at a depth the electrical code sets, and its path has to cross the yard without undercutting a footing. Where it enters the unit, the conduit passes through the slab or the footing in a sleeve placed before the pour. We also plan the grounding while the forms are open, since the reinforcing steel in the new footing can serve as a concrete-encased electrode when it is tied in before concrete arrives. That detail is easy to add before the pour and hard to add afterward, and the inspector sees it with the footing steel.
Gas meter and clearances
The gas meter matters if the unit will burn gas. A meter has to keep code clearances from windows, doors and vents, and a new line to the unit needs a trench of its own or a shared one with the right separation. Going all-electric, with a heat pump for heating and cooling and an induction range for cooking, skips that work and frees the yard near the meter. Wherever gas does run, a seismic shutoff valve at the meter or excess flow valves at the appliances can stop the supply if shaking breaks a line.
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Under a Covina ADU the base is a reinforced slab tied to continuous footings, with the conduit sleeves for power set before the concrete. Footing depth follows the soils report. Anchor bolts and hold-downs are placed in the forms, and the footing steel can be bonded into the electrical grounding system ahead of the pour.
Digging alongside the garage wall shows how deep the footing runs and whether it carries steel. Passing footings get new anchor bolts and plywood bracing, and failing ones are rebuilt in sections. Because a garage often stands near the main service panel, a conversion can need only a short feeder run, which makes it the simpler unit to power.
On a Covina lot, the package fits a single-level ADU whose floor stays within 500 square feet, whether it is freestanding, built onto the house or carved out of the garage. Plan check gives the electrical sheet, with its load calculation and panel location, close attention on these sets. For anything bigger or taller, the quote comes after we see the site.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.