Two tracks, two different approvals
A residential solar project in Bakersfield has two approval tracks: a local building permit and utility interconnection. The building authority reviews the installation under its permitting responsibilities. The serving electricity utility reviews the connection to its grid and authorizes parallel operation. A building inspection does not replace utility permission to operate, and a utility application does not replace a local permit. California's statewide Solar Permitting Guidebook describes these separate responsibilities. Its general framework is useful, but its 2019 edition is not a current Bakersfield submission checklist. California Solar Permitting Guidebook (2019)
The tracks can run partly in parallel as the installer develops the design and prepares submissions. Their dependencies still matter: a design revision can affect both sets of documents. Ask the installer to identify who owns each application, who receives correction notices, and what evidence closes each track. Keep separate records for the permit and utility application rather than treating all paperwork as a single approval.
Track 1: Local building permit
First establish the property's jurisdiction. An address inside Bakersfield city limits and an address in unincorporated Kern County do not necessarily use the same building department. A Bakersfield mailing address alone is not enough to settle that question. The homeowner should give the installer the actual installation address and ask it to confirm the responsible local authority before preparing a submission. For unincorporated county property, discuss the county route; for a city property, obtain the City's own current instructions.
The general California route includes an application with plans, plan review or an eligible streamlined review, installation under the approved permit, and inspection. The statewide guide describes local review of structural and electrical safety and inspection of the installed work. An installer normally prepares technical drawings and equipment documentation, responds to plan-check comments, and coordinates construction and inspection. Confirm those responsibilities in the written scope. The homeowner supplies property information, grants agreed access, and reviews changes that affect the contract. California Solar Permitting Guidebook (2019)
SolarAPP+ is credited to the National Laboratory of the Rockies. The SolarAPP+ adopting-jurisdiction list includes "Kern County, CA"; it does not list "Bakersfield". County availability matters for addresses in unincorporated Kern County, subject to the county's project eligibility and submission requirements. The list does not establish whether the City of Bakersfield accepts SolarAPP+ for addresses inside city limits. The City's own SolarAPP+ position remains unverified because its website blocked our access. SolarAPP+ adopting-jurisdiction list
We could not get through the Cloudflare challenge on the City of Bakersfield website: requests returned a 403 response headed "Just a moment...". We therefore have not verified the City's current fee schedule, plan-review turnaround, required inspections, whether an online portal is available for city addresses, or its own submission checklist. Do not read the statewide outline or the county's SolarAPP+ listing as confirmation of any of these city-specific details. Ask the City or your installer for current official instructions before relying on them.
Before installation, ask to see the approved scope and how any roof repairs, attachment changes, battery equipment, or electrical upgrades are being handled. During construction, changes should be raised with the responsible professionals and authority rather than assumed to fit the original approval. After installation, obtain the inspection outcome and ask who resolves any corrections. This is a general project-management checklist, not a statement of which inspection types or documents Bakersfield currently requires.
Track 2: Utility interconnection and permission to operate
The utility serving your address depends on where you are in Kern County. Check the utility named on your electricity bill. PG&E describes its service area as stretching from Eureka in the north to Bakersfield in the south. PG&E company profile Parts of eastern Kern County are served by a different utility, and which utility serves a specific address remains unverified here - confirm it from your bill before relying on any bill-credit assumption.
The utility application is separate from the local building permit. Interconnection review addresses the proposed system's connection to the electricity network; the utility may require additional information or work before authorizing operation. The installer normally prepares system information and coordinates the submission, while the account holder reviews and signs the relevant agreements. Ask who will answer utility questions and how you will receive copies of the submission, acceptance, and final authorization. The CPUC describes customer-generation interconnection as a distinct part of bringing a system online. CPUC customer-generation guidance
Do not operate the system in parallel with the grid until the serving utility authorizes it. Installed panels, a working monitoring screen, or a completed local inspection are not substitutes for that authorization. Ask the installer how equipment will remain in the appropriate state while approval is pending and who will perform activation afterward. For a PG&E account, begin with PG&E's own solar guidance and follow the requirements supplied for that account and project; this is not an assertion that PG&E serves every Kern County address. PG&E solar guidance California Solar Permitting Guidebook (2019)
The interconnection application date is consequential, not just administrative. The CPUC adopted the Net Billing Tariff (NBT) in D.22-12-056, with new applications submitted since April 15, 2023 using the successor tariff at the large investor-owned utilities covered by its guidance. Legacy net energy metering has transition provisions. The application date helps determine which tariff applies, so the homeowner should know it and keep the submitted application and the utility's acknowledgement. Confirm project-specific eligibility and treatment with the utility, especially when modifying an existing installation. CPUC tariff guidance
Ask each bidder to identify the tariff behind its production and bill-impact model. Generating electricity and receiving export credits are different parts of that model. A proposal using legacy assumptions is not directly comparable with one using current net billing assumptions. Keep the date, utility, tariff, and system design together in your comparison notes. This site cannot determine your account's tariff or approve an interconnection request; an installer estimate is not a utility determination. CPUC tariff guidance
Homeowner decisions and the final handover
Before choosing an installer, provide recent electricity usage, roof condition, ownership information, and any planned changes such as an electric vehicle or added cooling load. Ask for a written scope identifying equipment, exclusions, roof and electrical work, permit coordination, and utility paperwork. The homeowner chooses the contract and authorizes agreed work; the installer normally manages technical preparation and field work. Do not assume a referral from this site includes engineering, a permit application, or a guaranteed match.
Use two status questions at each update: where is the building permit, and where is the utility application? If a correction changes the design, ask whether both submissions need updating. No fixed review or installation timeline is promised here. Your installer should explain the project's dependencies and distinguish its own scheduling estimate from a date actually confirmed by the responsible authority. Neither track can be declared complete merely because an expected date has passed.
At handover, retain the final design, equipment details, warranties, permit and inspection records, interconnection application date, and utility permission to operate. Ask how monitoring is accessed, who handles faults, and what maintenance instructions apply. Review incentive assumptions separately: a completed permit or utility approval does not establish tax or program eligibility. Our incentives page explains the ended federal credit and the conditional California programs without treating them as guaranteed benefits for your home.