SDG&E setbacks apply during construction, not just after
SDG&E enforces minimum clearances between buildings and energized overhead power lines. These clearances are mandated by the California Public Utilities Commission General Order 95 and SDG&E's own service standards. Most architects and developers know this. What they often don't know is that those clearances apply to the construction process, not just to the completed building.
That means scaffolding, formwork, crane operations, material lifting, and worker positions during construction all have to maintain the same setbacks from energized lines that the finished building does. On a tight infill lot where the building itself can squeeze into the SDG&E setback envelope, the construction footprint usually can't. Construction equipment needs more clearance than a static wall.
The practical consequences:
- Service line de-energization may be required during certain phases of construction. SDG&E can de-energize a section of overhead line temporarily — but it has to be coordinated, scheduled, and paid for. It's not a same-day request, and it extends the construction schedule.
- Underground conversion may be the only viable option. On parcels where the construction process literally cannot maintain SDG&E clearances around the overhead line, the line has to be undergrounded. This is expensive — often $500,000 to over $2 million per block — and the cost is paid by the developer.
- Construction sequencing changes. Work that would otherwise happen in any order has to be sequenced around line de-energization windows or around what can be done within clearance limits.
These costs don't show up in a typical feasibility analysis because they're construction-process costs, not regulatory development costs. A pro forma built around "we'll deal with the power line during construction" can be off by a substantial amount when the actual coordination and undergrounding costs come due.
Front-side overhead lines cap your building at 30 feet
This one is genuinely surprising to most people who haven't run into it.
When overhead power lines run along the street in front of a parcel, the San Diego Fire-Rescue Department imposes a 30-foot height limit on the building — not because of any direct interaction between the lines and the building, but because of how firefighters access the roof in an emergency.
Standard fire response on residential buildings under approximately 30 feet relies on portable ladders that firefighters carry from the truck to the building. These ladders have a fixed reach. If overhead power lines obstruct the path between where the truck parks (the street) and where the firefighter needs to position the ladder (the front of the building), the access is compromised. The Fire Department's response: cap the height at 30 feet, which is what a portable ladder can reach without conflict with the power lines.
Above 30 feet, fire response generally requires aerial apparatus — ladder trucks with extendable arms — which can also be obstructed by overhead power lines but in different geometries. The 30-foot threshold is specifically the line where portable ladder reach stops being adequate.
What this means in practice:
- A parcel zoned for 65 feet of height with overhead front-street power lines will be capped at 30 feet by Fire. The zoning entitlement is irrelevant; the fire access requirement is binding.
- State Density Bonus Law height waivers cannot override this. The waiver provisions in SDBL apply to local zoning standards. Fire access requirements are health-and-safety standards that fall outside the waiver scope.
- The fix is to underground the front-street line — same expensive proposition as the SDG&E setback fix, paid by the developer, requires coordination with SDG&E and the City.
- Or to redesign at four stories or below. Which, given the type V construction breakpoint discussed in another article, may actually be the right answer for the project's economics anyway.
Where each issue applies
Power lines in San Diego's older neighborhoods are typically located either in the rear alley or along the front street. Rear-alley lines almost always trigger the SDG&E setback issue but rarely affect fire department access — fire trucks and ladders deploy from the street, not the alley. Front-street lines almost always trigger the fire department height cap and may also trigger SDG&E setbacks depending on the building geometry.
The first step in any project on an older neighborhood lot is to look at where the overhead lines actually are.
What this means for feasibility
When you're evaluating a parcel in North Park, Hillcrest, City Heights, Linda Vista, or any of San Diego's other older urban neighborhoods, the overhead power line location is a project-shaping constraint that needs to be checked early. A regulatory analysis that confirms "this parcel allows five stories" is incomplete if the overhead front-street power lines impose a 30-foot fire-access cap. A construction budget that assumes standard staging and equipment maneuvering is incomplete if SDG&E setbacks force expensive line de-energization or undergrounding.
The code tells you what's allowed. The lines tell you what's actually possible.