Solar panels in Winnetka

Winnetka began in 1922 as Charles Weeks's colony of one-acre egg farms. The Winnetka Neighborhood Council's map now runs from Nordhoff Street south to Victory Boulevard and the Los Angeles River wash, and from De Soto Avenue east to Corbin Avenue.

Most of today's houses came later. In ZIP code 91306, which covers nearly all of Winnetka, about 5,700 of the roughly 15,300 homes were built in the 1950s, at least twice as many as in any other decade, and only about 900 are older than that. Among owner-occupied homes, about 4,500 of roughly 8,300 are single-family houses built between 1940 and 1959.

Source: U.S. Census Bureau, American Community Survey, 2020–2024 five-year estimates for ZIP code 91306.

On a house that age, the roof sets the permit path. LADBS lets a flush-mounted array skip a separate structural permit only when every condition on its list is met, and three of them are about the roof itself: a single layer of roofing, no sagging or signs of alteration, and panels on no more than half of the total roof area. Miss any condition and the job goes to building plan check for a structural permit, on top of the electrical one.

If the roof needs replacing, do it before the panels go on. City rules treat a home re-roof over more than half the roof as a cool-roof job, so the new material must be a product rated and labeled by the Cool Roof Rating Council. A fresh single layer also clears the one-layer test. Already have panels? We take them down and put them back for the new roof; see solar panel removal and reinstall.

The main electrical panel is the second check. A panel sized for 1950s appliances may have no room, in space or in capacity, for a solar breaker, especially once an EV charger joins the house. We check your panel's ratings before we quote, and if it has to go, an electrical panel upgrade can ride along in the same project.

On September 6, 2020, the National Weather Service's record report put the reading at the Pierce College weather station at 121°F and called it the official all-time high for Los Angeles County. NOAA's quality-checked daily record for the station lists 120°F. The campus sits across Victory Boulevard in Woodland Hills, and its Farm Center faces Winnetka's southwest corner at Victory and De Soto.

Panels lose some output as they heat up, so a production estimate for a Winnetka roof should account for summer heat, not just the lab rating on the spec sheet. A flush-mounted array that meets the city's structural exemption sits 2 to 10 inches off the roof, and air moving through that gap helps cool the panels. The upside: long summer days, when the air conditioner works hardest, are also when a roof makes the most power.

Wildfire maps barely touch Winnetka. CAL FIRE's 2025 map of fire hazard severity zones in local areas, in the LA County GIS version revised in August 2025, leaves nearly all of it outside any zone. The exception is a strip on the north side of Victory Boulevard, from De Soto Avenue east to near Mason Avenue, where the edge of a Moderate zone drawn over Pierce College land reaches across the boulevard.

Neither that map nor the City's own map of very high zones puts any part of Winnetka in a very high fire hazard severity zone. So the LADBS rule that calls for Class A roofing in those zones does not apply here, and the panels and racking only have to match the fire class your roof requires. The fire rules that shape an array here are the pathway rules above.

From the same Corbin Avenue office we cover solar in Northridge to the northeast, solar in Reseda across Corbin and solar in Canoga Park across De Soto. If your existing panels have stopped producing, our solar repair service works on systems other companies installed. Every neighborhood we serve is on our Southern California service areas page.