Building an ADU in Bakersfield: 2026 Rules, Fees and Permits

California law lets you add an ADU on many Bakersfield lots with a house on them. The city must approve a qualifying ADU without a public hearing, decide within 60 days of a complete application, and charge no impact fees on units of 750 square feet or less. The City of Bakersfield issued building permits for 65 ADUs in 2025, according to its report to the state.

An ADU is an accessory dwelling unit: a second, smaller home on the same lot, with its own kitchen, bathroom and place to sleep. This guide is for owners thinking about a rental unit or more room, for investors running numbers, and for buyers looking at a home that already has one.

First check one thing: a Bakersfield mailing address does not always mean City of Bakersfield rules. Some Bakersfield addresses sit in unincorporated Kern County, and those lots go through Kern County Planning instead. State ADU law applies to both.

What counts as an ADU in Bakersfield?

The City of Bakersfield's ADU Toolkit, published February 15, 2024, describes four kinds:

• Detached ADU: a new, separate building in the backyard. Prefab and modular units count.
• Attached ADU: an addition built onto the main house with its own entrance.
• Conversion ADU: an existing garage, shed or other structure turned into a living unit.
• Junior ADU (JADU): up to 500 square feet carved out of the existing house, with at least an efficiency kitchen.

How many you can add depends on the lot. Under Government Code section 66323, a single-family lot must be allowed at least one ADU converted from existing space, one JADU and one new detached ADU, according to HCD's ADU Handbook. On a lot with an existing apartment building, the law allows ADUs in unused space like storage rooms or garages, plus up to eight detached ADUs, never more than the number of existing units.

How many ADUs is Bakersfield actually building?

Not many yet. Every city and county reports its permits to the California Department of Housing and Community Development (HCD) in an Annual Progress Report. I pulled the Bakersfield and Kern County numbers from HCD's open data on October 17, 2026.

ADU building permits, as each agency reported them to HCD. Read October 17, 2026.

Put 65 next to everything else the city reported for 2025: building permits for 1,284 single-family homes and 2,125 new units in total. By that count, ADUs were about 3 percent of the city's permitted units. The same report records 64 ADUs reaching a certificate of occupancy or other final sign-off in 2025. Those are not necessarily the same 65 projects, since some started in earlier years.

Unincorporated Kern nearly doubled its ADU permits in 2025, from 75 to 142, so plenty of the activity around Bakersfield is happening outside city limits.

What state law says the city has to allow

California rewrote its ADU law into Government Code sections 66310 to 66342 in 2024 and changed it again on January 1, 2026. A city can set its own standards, but not stricter than these. Here is what I read on the official code and in HCD's ADU Handbook, updated March 2026:

Bakersfield's toolkit, written in February 2024, adds a local layer for ADUs that do not fall under section 66323: 10 feet between buildings for a detached ADU, exterior materials and style that match the main house, and one parking space unless the ADU is a garage conversion or sits within half a mile walking distance of transit. A small detached unit or a conversion that qualifies under section 66323 skips those local design rules. Ask the city which path your plan is on before you pay for drawings. Either way, the toolkit says Bakersfield does not allow ADUs to be rented for less than 30 days.

On selling the ADU as its own unit: I did not find a Bakersfield condo ordinance under section 66342. Assume the ADU and the house sell together, and ask the city before you plan around anything else.

What fees does an ADU pay in Bakersfield?

This is where the state law saves real money, and where most people's numbers are wrong.

• Impact fees: none on an ADU of 750 square feet or less, or a JADU of 500 or less. Above that, impact fees are charged in proportion to the main house. HCD's example: a 1,000 square foot ADU behind a 2,000 square foot house could owe about half the fee a new house would.
• School fees: a school district may charge on an ADU larger than 500 square feet. Under 500, no school fee.
• Utility connection and capacity charges: these are separate from impact fees. An ADU converted from existing space, or a JADU, cannot be treated as a new home for these charges unless it is built along with a new house. For other ADUs, any charge has to be proportionate to the unit's size or plumbing fixtures compared with the main house (Government Code section 66311.5).
• What you still pay: the city's site plan review fee, building permit and plan check fees, and any connection or school fees that do apply. The toolkit lists those as due before the permit is issued. Ask Development Services for the current fee schedule at 661-326-3733.

Then the ongoing costs. An ADU is new construction, and the city's toolkit says your taxes go up based on the value the ADU adds, without reassessing the rest of the property. Ask the Kern County Assessor how your project will be valued. If you are new to how that bill works, my post on Kern County property tax rates walks through it, and new construction can also bring a supplemental tax bill once the work is finished. City lots also carry a sewer charge on the tax bill that nearly doubled this year, so ask the city how a second unit is billed before you build your budget.

How long the Bakersfield ADU process takes

The city's toolkit estimates each stage. Your timeline depends on the design, your builder and how clean your plans are.

1. Research, about 1 month. Confirm your zoning, whether you are in city limits or the county, and which type of ADU fits the lot.
2. Design and plans, 1 to 3 months. Work with a designer and contractor, or use a prefab unit.
3. Site plan review, then building permit, 1 to 6 months. Both are filed online. Site plan review comes first, at bakersfieldcity.us/1075. The building permit follows in the city's ProjectDox portal.
4. Construction, 2 to 12 months. City inspections along the way, then a final sign-off.

The 60-day clock in state law covers the city's decision on a complete application. It is not the whole project timeline. Incomplete plans and correction rounds add time, and so do site issues like utility capacity, easements, fire access, or HOA rules recorded on the property. Check your title report and any CC&Rs early.

Does an ADU work as a rental in Bakersfield?

It can, but run the numbers honestly. Your ADU competes with every apartment and house for rent in town. Here is what Zumper showed for Bakersfield in October 2026:

Source: Zumper Bakersfield rent research, read October 17, 2026, with 556 rentals listed.

These are citywide figures for all rentals, not ADU rents. They are market context. What your unit rents for depends on its size, finish, privacy and location. Build costs vary too much by design and site for me to print a return, so get two contractor bids covering design, site work, utilities, construction and permits, and set them against realistic rents, the added property tax, insurance, utilities and upkeep. If you are comparing an ADU with buying a separate rental, my post on buying a rental property in Bakersfield covers that side.

If you plan to finance the build, talk with a lender before you pay for plans.

Buying a Bakersfield home that already has an ADU

A second unit can be a real plus, but only if it is legal. Before you write an offer:

• Ask the seller for the permit and the final inspection sign-off for the unit.
• Check the permit history with the city or the county, depending on where the lot is.
• Ask your lender early how they will treat the unit.
• Have the inspector look at the ADU as carefully as the main house.

For an unpermitted unit built before January 1, 2020, state law (Government Code section 66311.7) generally stops the city from denying a permit just because the unit breaks building standards or ADU rules, unless fixing it is needed for health and safety or the building is substandard. Units built later get no such break. Either way, legalizing can mean real work. Price it before you count the unit as income, and if the inspection turns something up, here is how a repair request after inspection works.

Common questions

Can I rent my Bakersfield ADU on Airbnb?

Not for stays under 30 days. The city's ADU Toolkit says Bakersfield does not allow short-term or vacation rentals of ADUs, and state law lets cities set that 30-day minimum. Monthly or longer rentals are allowed.

Do I have to live on the property?

Not for an ADU. State law bars owner-occupancy rules for ADUs. For a junior ADU, the owner must live on the property only if the JADU shares a bathroom with the house, under the rule in effect since January 1, 2026.

How big can a detached ADU be?

State law caps a detached ADU at 1,200 square feet, and a city can set a lower maximum as long as it is not under 850 square feet. A detached unit of up to 800 square feet with 4-foot side and rear setbacks qualifies for the protected path under section 66323. Above 750 square feet, impact fees start to apply in proportion to the main house.

Can I turn my garage into an ADU?

Yes. Garage conversions are allowed and encouraged under state law, and Bakersfield's toolkit says a garage conversion does not need a replacement parking space. You still need site plan review and a building permit.

Will an ADU raise my property taxes?

Generally yes, based on the value the ADU adds. The city's toolkit says the rest of the property is not reassessed. Ask the Kern County Assessor how your project will be valued.

Can I sell the ADU separately from the house?

Generally no. State law keeps the ADU and the house together, with narrow exceptions for a local ADU condo ordinance or certain nonprofit projects. I did not find an ADU condo ordinance in Bakersfield, so confirm with the city.

The short version

If you own a house in Bakersfield, state law gives you real protections on size, parking, fees and review time for a qualifying ADU. The standards, costs and timeline still depend on your lot and your plan. What decides whether it is worth it is the build cost against what the unit will rent for, and that is a number you get from real bids, not from a calculator. If you want to talk through a lot you own or a home with an ADU you are looking at, book a time with me at linktr.ee/realestatejulio. Ask me anything, even the random stuff.

Rules change. Confirm current standards and fees with City of Bakersfield Development Services or Kern County Planning before you design. This is general information, not legal or tax advice.

Only a licensed lender can quote a rate, a payment or an APR for your situation. Equal Housing Opportunity.

Sources: HCD Annual Progress Report data, Table A2, read October 17, 2026. California Government Code sections 66314, 66315, 66317, 66321, 66323 and 66333, read October 17, 2026 on leginfo.legislature.ca.gov. HCD ADU Handbook, updated March 2026, for sections 66311.5, 66311.7 and the section 66323 categories. City of Bakersfield ADU Toolkit, February 15, 2024. Zumper Bakersfield rent research, October 2026.

Julio Ochoa | Next Level Realty | CalDRE 02198776 | 661-933-8428