A ground array: the license question and the permit question
A ground-mounted system puts the array on a frame on your lot instead of on the roof. CSLB's Solar Smart page names A, B, C-10 Electrical and C-46 Solar as the classes that can legally install photovoltaic systems, and a ground array is a photovoltaic system; C-4, C-36 and C-53 are limited to solar heating. Ask the company for its CSLB license number and class and check both on CSLB's lookup before you sign.
A ground array's price in California, and what it leaves out
Our model puts a ground-mounted system at $24,500 to $32,600 for a typical 7 kW ground-mounted system, before any incentive. It takes the rooftop range, adds a ground-mount premium from two national sources, adjusts for California's installer wage ratio of 1.09 and adds a typical city permit fee of $372. It's an estimate and not a quote, with no federal credit subtracted.
The range doesn't cover trenching to the house, a panel upgrade, a battery or financing charges. Ask for the foundation type, the system size in kW DC, the cost per watt before incentives and who pulls the permit.
| Item | Figure | What it is |
|---|---|---|
| Estimated range, not a quote | $24,500 to $32,600 for a typical 7 kW ground-mounted system, before any incentive | Built from 4 national published ranges, adjusted by the California solar installer wage ratio (1.09) plus a typical permit fee ($372). Before any incentive: there is no federal credit for a system installed in 2026. Basis: no California company price for this job, so the national estimate stands. |
| Solar photovoltaic installer wage, California mean | $30.42 an hour | BLS OEWS (May 2025) installer pay, not the price of a ground array. |
| Down payment limit on a home improvement contract | $1,000 or 10 percent, whichever is less | B&P 7159.5, as CSLB applies it to a residential solar installation; it caps what a contractor may collect up front. |
| Cap on a city's residential PV permit fee | $450 plus $15 per kW above 15 kW | Gov. Code 66015(a). A statutory ceiling on the city's fee, which a city may exceed with a written finding. |
Estimated range. Built from national published ranges (4 sources), adjusted by California's solar installer wage ratio to the US (1.09, BLS May 2025), plus the city solar permit fee where the city publishes one. Not a quote. One California installer publishes its own quoted range (per watt and per battery), too few to build a range from; the others print blog averages, which we do not count. We have no California company price for this job, so the range is our national estimate alone. Full method. Prices as of Oct 23, 2026.
The contract rules that come with any solar sale
Under CSLB's reading a residential solar installation is home improvement. B&P 7169 puts the Solar Energy System Disclosure Document on the front or cover page of the contract, with the total cost including financing, the complaint route and your cancellation right. A down payment can't exceed $1,000 or 10 percent of the price, whichever is less, and you have three business days to cancel, or five if you're 65 or older on a contract entered since January 1, 2021. CSLB takes solar complaints at 800-321-CSLB (2752).
Which permit paths cover a ground array, city by city
Thousand Oaks says it outright: ground-mount, ballasted and carport systems need the standard solar permit, not its SolarAPP+ path. Other cities word their fast paths for the roof. Stockton's automated permits cover a residential roof-mounted retrofit on the main dwelling only, and Elk Grove's SolarAPP+ policy covers roof-mounted systems up to 38.4 kW. Lancaster's Symbium permits are for roof-mounted residential solar, with other projects sent to Building and Safety staff. Roseville's SolarAPP+ application allows no trenching.
Gov. Code 65850.5(g) called for an expedited ordinance for small residential rooftop solar by September 30, 2015, and Long Beach's express permit is for flush-mounted rooftop PV up to 38.4 kW. SB 379 sets its 38.4 kW AC limit for a residential solar system in the CEC's words, so ask your building department which path a ground array takes in your city and what clearances it applies.
The 2022 California Residential Code R324.6 is written in terms of roof planes and ridges: two 36-inch pathways from the lowest roof edge to the ridge, and 18-inch or 36-inch setbacks at a horizontal ridge. Its PV section, R907, is headed "Rooftop-Mounted Photovoltaic Panel Systems." Those are 2022 sections; the 2025 edition took effect January 1, 2026 and may differ.
Height, yard and permit rules four cities print for ground arrays
San Diego draws its line at five feet. Its Information Bulletin 301 requires a building permit or combination building permit for a ground-mounted system whose support structure stands more than five feet above ground, and zoning, height, brush management and FAA notification rules also apply. The city's undated PV inspection guidelines list three inspections for a ground mount: footing, underground electrical, and a final of the complete system.
Los Angeles splits the review. LADBS Information Bulletin P/GI 2023-027 permits ground-mounted panels with no use underneath in residential zones when they're approved as an accessory to the main use. Panels taller than the fence wall height in LAMC 12.22.C.20(f) get an LADBS review of whether the height is needed, and a Hillside Area lot needs a grading pre-inspection. LAFD evaluates panels in yards for life safety, and its solar requirement page, undated and citing the 2006 International Fire Code, asks for "A 10 feet minimum clearance" around ground arrays that "shall not obstruct Fire Department access." The bulletin prints no setback or height cap for a home ground mount, so ask LADBS what applies to your lot.
Glendale caps detached solar equipment at 15 feet. Its code measures the height from the lowest exposed point of the support structure to the top of the panels. The equipment stays out of the street front and street side setbacks except over parts of an existing building, and the required interior setback is reduced by 30 percent. Fremont's code, as of its December 2024 text (it may have been amended since), sets a 12-foot maximum on residential parcels, puts the array in the rear yard and requires a design review permit. It also says a ground system that doesn't work for one year is deemed abandoned and must be dismantled and removed.
There's a state model, too. The State Fire Marshal's Model DSPACE Inspection Guide (2023) is a model that a city or county may adopt to enforce defensible-space law under PRC 4291. For free-standing PV it prints "A minimum 10-foot clearance for clusters of panels not exceeding 1,500 sqft," a 30-foot clearance for larger clusters, and at least 20 feet between clusters, edge to edge. Ask your fire department whether it has adopted the guide.
Fee limit, property tax and net billing for a ground array
Gov. Code 66015 limits a residential PV permit fee to $450 plus $15 per kilowatt above 15 kW unless the city adopts a written finding. Riverside's June 2025 schedule prints $350 for a residential solar energy system up to 15 kW and $15 for each additional kW. Revenue and Taxation Code 73 excludes any new active solar system from reassessment if it's completed before January 1, 2027, and it stays excluded until a change in ownership.
The IRS says the Residential Clean Energy Credit isn't available for property placed in service after December 31, 2025. Net billing applies by interconnection date, since April 15, 2023, in PG&E, SCE and SDG&E territory, wherever the array sits on your lot.
When a ground array is an emergency
- Smoke, fire or a burning smell from the ground array, its wiring or the inverter: call 911 and stay well back from it.
- Output in the app has dropped below what you're used to.
- The app is offline.
- A panel on the frame is cracked, with no smoke or burning smell.
What to settle before quotes
- Mark where on the lot you would want the array, and photograph the spot and the path to your electrical panel.
- Find your utility on the latest bill, since net billing applies in PG&E, SCE and SDG&E territory only.
- Look up each company's CSLB license number and class.
Permits for a ground array
Gov. Code 65850.5 says a city or county shall approve a solar application administratively through a nondiscretionary permit, with review limited to health and safety. Your city or county building department issues it, and PG&E, SCE or SDG&E gives permission to operate under Rule 21. The interconnection and permits page lists the utility fees: $145, $94 and $132.
Ask for the company's contractor license number and look it up with your state's licensing board before you sign.
Questions people ask
Does a ground-mounted system need a different license?
No: CSLB names A, B, C-10 and C-46 for installing photovoltaic systems. Check the license number and class on CSLB's lookup.
Can a ground array use the rooftop express permit?
Not in Thousand Oaks, which sends ground-mount systems to its standard solar permit. Stockton, Elk Grove, Lancaster and Long Beach word their fast paths for roof-mounted systems, so ask your building department.
Do the roof fire pathways apply to a ground array?
R324.6 is written for roof planes and ridges. In Los Angeles, LAFD's undated requirement page says its rooftop setbacks don't apply to freestanding ground arrays and asks for 10 feet of clearance around them, so ask your own city what it applies.
Does the disclosure document apply to a ground mount?
B&P 7169 applies to every solar contract. CSLB exempts only a system installed as a standard feature of new construction.
How much does a ground-mounted system cost in California?
Our estimate is $24,500 to $32,600 for a typical 7 kW ground-mounted system, before any incentive, a model figure and not a quote. It adds a ground-mount premium to the rooftop range.
- U.S. Bureau of Labor Statistics, OEWS May 2025: Solar photovoltaic installers (SOC 47-2231), California statewide, mean hourly wage Read Oct 23, 2026.
- U.S. Bureau of Labor Statistics, OEWS May 2025: Solar photovoltaic installers (SOC 47-2231), United States (national), mean hourly wage Read Oct 23, 2026.
- SolarPanelMatch: how we estimate costs, California (editorial policy) Read Oct 23, 2026.
- BLS Public Data API (OEWS series OEUS060000000000047223101..13, OEUN000000000000047223101..13) Read Oct 23, 2026.
- CSLB bulletin 20-22, solar contracts Read Oct 23, 2026.
- Government Code 66015 (leginfo) Read Oct 23, 2026.
- CSLB Solar Smart Read Oct 23, 2026.
- CSLB Licensing Classifications Read Oct 23, 2026.
- B&P Code 7169 (leginfo) Read Oct 23, 2026.
- CSLB Solar Energy System Disclosure Document (13L-6) Read Oct 23, 2026.
- B&P Code 7159 (leginfo) Read Oct 23, 2026.
- Government Code 65850.5 (leginfo) Read Oct 23, 2026.
- City solar permit page, Long Beach Read Oct 23, 2026.
- CEC Residential Solar Permit Reporting Program - SB 379 Read Oct 23, 2026.
- 2022 California Residential Code, Title 24, Part 2.5, R324.6 (ICC Digital Codes) Read Oct 23, 2026.
- Revenue and Taxation Code 73 (leginfo); BOE LTA 2024/031 Read Oct 23, 2026.
- IRS Residential Clean Energy Credit; IRS OBBBA provisions Read Oct 23, 2026.
- CPUC Net Energy Metering and Net Billing Read Oct 23, 2026.
- CPUC Electric Rule 21: Generating Facility Interconnections Read Oct 23, 2026.
- PG&E Net Energy Metering (NEM) Program Read Oct 23, 2026.
- SCE Net Energy Metering FAQ; SCE Solar Billing Plan factsheet Read Oct 23, 2026.
- SDG&E Generation Interconnection 101; SDG&E NEM and Solar Billing Plan pages Read Oct 23, 2026. Confirm with the source before you rely on it.
- City solar permit page, Thousand Oaks Read Oct 23, 2026.
- City solar permit page, Stockton Read Oct 23, 2026.
- City solar permit page, Elk Grove Read Oct 23, 2026.
- City solar permit page, Lancaster Read Oct 23, 2026.
- City solar permit page, Roseville Read Oct 23, 2026.
- Solar permit fee, Riverside Read Oct 23, 2026.
- ICC Digital Codes, 2022 California Residential Code Chapter 9 (CBSC adopted text) Read Oct 23, 2026. Confirm with the source before you rely on it.
- City of San Diego, Information Bulletin 301; PV inspection guidelines (pvinspectionguidelines.pdf) Read Oct 23, 2026.
- LADBS, Information Bulletin P/GI 2023-027 Read Oct 23, 2026.
- LAFD, Solar Power Uses and Placement Requirements Read Oct 23, 2026. Confirm with the source before you rely on it.
- City of Glendale Municipal Code Chapter 30.30 Site Planning, section 30.30.050 (eCode360) Read Oct 23, 2026.
- City of Fremont Municipal Code Chapter 18.185 (code publisher; Wayback copy 2024-12-13) Read Oct 23, 2026. Confirm with the source before you rely on it.
- CAL FIRE OSFM, Model DSPACE Inspection Guide, 2023 edition Read Oct 23, 2026. Confirm with the source before you rely on it.