New Construction in South Pasadena
Gravity pipes claim their routes first in a new South Pasadena house. See how drain lines set the order for every other trade.
Pipes that rely on gravity claim their routes first in a new South Pasadena house, and every other trade works around them. Drain lines need a steady fall to the sewer, so they are drawn ahead of ducts, wires and framing chases. Once the drains are placed, the electrician and the heating contractor fill the remaining space in the walls and floors.
Rough-in order
Underground plumbing is set and inspected before the slab is poured or the floor framed. Above the foundation, waste and vent lines go in next, then supply lines, then ducts, then wiring. Each trade gets a walk-through of the framing so notches and holes are placed with intent. Structural members are never cut afterward without the engineer's approval, which keeps the inspection record clean. Gravity does not negotiate, which is why a drain gets its place at the start and the framing is adjusted around it.
From drywall to final
Insulation is inspected before the walls close, and drywall follows. Finish plumbing, cabinets, flooring and paint come next, and the final inspection checks smoke alarms, handrails, address numbers and the sprinkler system. The certificate of occupancy follows final approval, and each phase in this order has a reason behind its place. The final walk-through ties the drawings to the finished rooms, so every outlet, switch and valve sits where the plans say it does. A good sequence also keeps the site tidy and safe.
New Construction in South Pasadena: common questions
A lot that qualifies can take the unit and house together, and that means a single trench for the sewer. The city reviews both in one set. State ADU law applies to the unit. Sharing it keeps the plumbing plan simple.
A survey comes first, then a soils investigation, structural and energy drawings and a city permit. Any existing house needs demolition approval and disconnected utilities. Underground plumbing routes are drawn into the set so inspectors see the sequence.
Building, energy and green codes from the state apply, with city zoning controlling height, setbacks and coverage. The plumbing code sets pipe sizes, venting and the fall of each drain. A second unit follows state ADU law.
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