Quick Answer: In Burbank, a detached ADU can typically reach 850 to 1,000 square feet depending on the number of bedrooms, with a minimum 4-foot setback from side and rear property lines. Most complete applications must be approved or denied within 60 days under California’s ministerial ADU review rules, and parking is often waived if the lot sits within a half-mile of public transit. Owner-occupancy is generally not required for a standard ADU, though Junior ADUs have their own rules. Always confirm current numbers with Burbank’s Community Development Department before you plan or buy.
Where Can You Build an ADU on a Burbank Lot?
The starting point for almost every ADU project is the same question: where on the property is it actually allowed to sit? Burbank’s rules give homeowners fairly wide latitude here, whether the unit is attached to the main house, built above or behind a garage, or a fully detached structure in the backyard.
For most single-family lots, the required rear and side yard setback for an ADU is 4 feet, matching the minimum setback the state sets as a floor for cities statewide. Front yard placement is more restrictive: a new ADU generally has to follow the same front setback as the main house on that lot, though the city allows some flexibility, such as converting an existing structure or building closer to the front when there’s genuinely no other place to put it on the lot.
If you’re planning a detached unit near the existing house, Burbank also asks for a minimum separation between the two buildings, plus a smaller clearance for roof eaves. Anything with a raised floor near a property line, like a porch, deck, or exterior stairway more than a few inches off the ground, has to keep its own setback from the rear and side lines. A Junior ADU works differently since it’s built entirely within the existing walls of the house (often converting a bedroom and adding a small kitchenette), so lot placement isn’t really a factor for that option.
How Big Can a Burbank ADU Be?
Size limits depend on unit type, bedroom count, and in some cases location on the lot. Here’s the general framework homeowners are working with:
| ADU Type | Typical Maximum Size |
|---|---|
| Detached studio or one-bedroom | Up to 850 sq. ft. |
| Detached ADU with two or more bedrooms | Up to 1,000 sq. ft. |
| Attached or detached ADU in the Mountain Fire Zone or front-yard placement | Up to 800 sq. ft. |
| Junior ADU (built inside the existing home) | Up to 500 sq. ft. |
There’s also a modest size bonus available: for each code-compliant parking space provided on-site beyond the minimum required, the city allows extra square footage to be added to the unit. Note that a 2025 state law (effective January 1, 2026) clarifies that these size caps are measured as interior livable space, which can matter when you’re working out exterior wall thickness and mechanical closets with your designer.
Because these numbers get updated periodically at both the city and state level, treat any figure here as a planning benchmark and confirm the current maximum with Burbank’s Community Development Department before finalizing architectural plans.
What Are Burbank’s Height Limits for an ADU?
Height limits vary quite a bit depending on how the unit is configured:
- An ADU attached to the main dwelling can generally reach 20 feet to the top of plate and 30 feet to the top of the roof, matching typical single-family height allowances.
- A detached ADU built above a garage or other accessory structure can reach roughly 20 feet to top of plate and 23 feet to the top of the roof.
- A standalone, single-story detached ADU is generally capped around 17 feet to any architectural feature.
- On lots near transit or multi-family zoning, detached ADUs may be allowed up to about 18 feet to the roof or architectural features, with a couple of extra feet available if the roof pitch is designed to match the main house.
One detail that trips up a lot of homeowners: attic or loft space inside a one-story ADU has to stay under a fairly low height threshold, or the city will treat it as a second story, which changes the whole height calculation. If you’re dreaming of a lofted sleeping area above a great room, loop your designer in early on this one.
Do You Need Parking for a Burbank ADU?
This is one of the more homeowner-friendly parts of ADU law, and it applies in Burbank too. Parking is not required for an ADU when the property is within about a half-mile walking distance of public transit, or when the block requires a residential parking permit. California law layers on a few more statewide exemptions as well, including proximity to a car-share vehicle and units built as part of a new single-family home’s permit.
When parking isn’t exempt, the standard requirement is one space per ADU, and it doesn’t have to be a dedicated new spot. Tandem parking in an existing driveway, or parking within an existing setback area, is generally acceptable, with minimum space dimensions around 18 feet deep by 8.5 feet wide. If building the ADU means demolishing or converting an existing garage or carport, that lost parking generally does not need to be replaced. Junior ADUs don’t require any additional parking at all.
Does Burbank Require Owner-Occupancy?
For a standard, standalone ADU, Burbank currently does not require the property owner to live in either the main house or the ADU. That’s consistent with California’s statewide approach, which strips owner-occupancy mandates for regular ADUs built between 2020 and the early 2030s (with a narrow exception for units sold separately to income-qualified buyers under a newer program).
Junior ADUs are a different story, because a JADU typically shares some space, like a bathroom, with the main house. Historically, Burbank has required an owner-occupancy covenant for JADUs, meaning the owner has to live in either the main dwelling or the JADU. A 2025 state law set to take effect January 1, 2026, narrows this a bit further, easing the owner-occupancy requirement for JADUs that have their own private bathroom. Either way, expect a recorded covenant to be part of the JADU permit package, and expect new state restrictions limiting JADUs (and some ADUs) from being rented out short-term, generally requiring lease terms longer than 30 days.
How Does the Burbank ADU Permit Process Actually Work?
Because ADUs are considered a state housing priority, California law requires most cities, Burbank included, to review complete, code-compliant ADU applications ministerially. In plain terms, that means no public hearing, no discretionary approval, and no neighbor notification process for a project that meets the objective development standards. The city has to determine whether an application is complete within a set window (typically a couple of weeks) and then approve or deny the completed application within 60 days.
Burbank has also built a program to make this even smoother: the Burbank Pre-Approved ADU Program (BPAP) lets homeowners choose from a library of pre-reviewed ADU floor plans that have already cleared plan check once. Since the design itself is already vetted, permit issuance for a BPAP unit tends to move faster than a fully custom design, though you’ll still go through site-specific review for things like utility connections, grading, and fire access. Either path (custom design or pre-approved plan) starts with a building permit application through the city’s Community Development Department, coordinated across planning, building and safety, public works, and Burbank Water and Power.
What Fees Should You Budget For?
Fee structures are one of the areas most likely to shift year to year, so treat any number here as a starting point for a conversation with the city, not a quote. Broadly speaking, California law shields smaller ADUs from many local development impact fees: units under roughly 750 square feet are typically exempt from these impact fees altogether, while larger ADUs are charged fees calculated proportionally to the size of the primary home rather than a flat rate. On top of that, expect standard building permit and plan check fees, along with separate utility plan check and connection charges through Burbank Water and Power for electric and water service.
A 2025 state law taking effect in 2026 further expands impact fee exemptions for smaller units and tightens timelines for how quickly a city has to review application completeness, so the fee and timeline landscape for Burbank ADUs is genuinely getting more favorable for homeowners over time. Get a written, current fee estimate from the city before you finalize your project budget.
What Should Buyers Look For When Evaluating a Property’s ADU Potential?
If you’re house hunting in Burbank with an ADU in mind, whether for a home office, a place for aging parents, or rental income, a few due-diligence steps go a long way. First, confirm whether any existing secondary unit on the property was actually permitted. An unpermitted “granny flat” or converted garage can complicate financing, insurance, and resale, and the city can require it to be brought up to code or removed. Burbank’s building records and permit history are available through the Community Development Department, and it’s worth pulling them before you write an offer that assumes rental income from a unit that was never legalized.
Second, look at the lot itself: setback lines, existing structures, garage placement, and overall depth all affect how much room there really is to add a code-compliant unit later. A garage in the right spot can sometimes convert into an ADU more cheaply than building new from the ground up. Third, check the property’s proximity to transit, since that parking exemption can make a real difference in how flexible your future site plan is. A knowledgeable local agent and a quick call to the Planning Division can save you from assumptions about ADU potential that don’t hold up once you’re actually under contract.
Frequently Asked Questions
Can I build an ADU on any residential lot in Burbank?
Most single-family and multi-family residentially zoned lots in Burbank can accommodate at least one ADU, and often a Junior ADU as well, under current state and local law. Lot size, existing structures, and setback lines still shape exactly where and how large the unit can be, so it’s worth a quick conversation with the city’s Planning Division for any specific property.
Do I need a public hearing or variance to build an ADU in Burbank?
No. As long as your ADU meets the objective development standards (setbacks, height, size, parking), state law requires the city to review it ministerially, meaning no discretionary hearing or neighbor notification process is required. That’s a major difference from a typical zoning variance or conditional use permit.
How far does an ADU need to be from my property line in Burbank?
The typical rear and side yard setback for an ADU is 4 feet, whether the unit is attached or detached. Front yard placement generally has to match the setback of the main house, with limited exceptions. Always verify current setback figures with the city before finalizing a site plan.
What is the maximum size of a detached ADU in Burbank?
A detached studio or one-bedroom ADU can generally reach up to 850 square feet, while a detached unit with two or more bedrooms can go up to about 1,000 square feet. Units in the Mountain Fire Zone or placed in the front yard are typically capped lower, around 800 square feet.
What’s the difference between an ADU and a Junior ADU (JADU)?
A standard ADU is a separate living unit, attached or detached, with its own kitchen and bathroom. A Junior ADU is built entirely within the walls of the existing single-family home, tops out around 500 square feet, and may share some facilities like a bathroom with the main house. JADUs also carry their own owner-occupancy and permitting rules.
Do I need to add parking spaces for a new ADU?
Often not. Parking is generally waived when the property sits within about a half-mile of public transit or on a block that requires a residential parking permit, among other exemptions. When parking is required, it’s typically just one space per ADU, and it can usually be tandem or within an existing driveway or setback area.
Do I have to live in the house if I build an ADU in Burbank?
For a standard, standalone ADU, no. Owner-occupancy is currently not required in Burbank for a regular ADU. Junior ADUs are treated differently, generally requiring the owner to live in either the main house or the JADU, though a 2025 state law narrows that requirement for JADUs with their own private bathroom starting in 2026.
How long does the ADU permit process take in Burbank?
State law requires the city to determine whether an application is complete within a set short window and then approve or deny a complete, code-compliant ADU application within 60 days. Using Burbank’s Pre-Approved ADU Program, which offers a library of plans that already cleared plan check, can help move the process along even faster for many projects.
Will I owe impact fees on my new ADU?
Smaller ADUs, generally under about 750 square feet, are typically exempt from local development impact fees under state law, while larger units are charged fees proportional to the size of the primary home rather than a flat rate. Standard building permit, plan check, and utility connection fees still apply regardless of size, so get a current written estimate from the city before budgeting your project.
Can I rent my Burbank ADU out as a short-term or vacation rental?
Generally, no. Recent state law restricts short-term rental use of ADUs and Junior ADUs, typically requiring lease terms longer than 30 days. If short-term rental income is part of your investment plan, confirm current restrictions with the city before counting on that revenue.
This article is general information for Burbank homeowners and buyers, not legal, architectural, or planning advice, and current ADU setbacks, size limits, fees, and procedures should always be verified directly with the City of Burbank Community Development Department before you rely on them.
About Will Flannigan
Will Flannigan is a California licensed real estate agent (DRE #01951292) and Certified Trust & Probate Specialist (CTPS) with The Nell Team at Equity Union Real Estate. A former attorney, Will brings a background in property management and over a dozen home flips to every transaction, and has been licensed since 2014. A 20+ year resident of Burbank Rancho, Will specializes in Burbank, Altadena, Pasadena, Glendale, and the greater San Gabriel Valley, with fluency in Mandarin serving clients in San Marino and beyond.
Thinking about adding an ADU to your Burbank property, or buying a home with one already built? Let’s talk through the possibilities.
📞 (310) 920-1108
📧 flanniganhomes@gmail.com
🌐 willflanniganrealestate.com
📍 4404 Riverside Dr. Suite D, Burbank, CA 91505