Research by DoINeedAPermit Research Team · Updated May 2026
The Short Answer
Yes. California Government Code 65852.2 and AB 68 mandate ADU approval in most cases, but Redondo Beach applies stricter setback and design standards than state minimums allow, and you must navigate the city's specific plan-review process.
Redondo Beach sits in a coastal climate zone (3B-3C) where California's ADU state law (Gov. Code 65852.2) pre-empts nearly all local zoning restrictions — meaning you can build an ADU on many lots even if the underlying zoning says no. However, Redondo Beach has adopted a local ADU ordinance that adds city-specific setback requirements, parking conditions, and design-review thresholds that the state law does NOT override. Unlike some California cities that have rushed to adopt ministerial approval (automatic approval without discretionary review), Redondo Beach still requires full design review for most ADUs — meaning your application goes to planning staff, not auto-approved. The city's 60-day shot clock (per AB 671) begins only when your application is deemed complete, and Redondo Beach's completeness standard is stricter than state-law minimums. Coastal access and view-preservation standards may also apply if your lot is near the beach or in a view-corridor overlay. Bottom line: State law gets you in the door, but Redondo Beach's local rules dictate how much setback space you lose, whether you pay for parking, and how long plan review takes.

What happens if you skip the permit (and you needed one)

Redondo Beach ADU permits — the key details

California Government Code 65852.2 and its successor law AB 68 (effective January 1, 2023) explicitly authorize ADUs on single-family lots and require local approval 'ministerially' — meaning without subjective discretion — in many cases. However, Redondo Beach has not fully adopted ministerial approval; the city still requires design review and applies its own setback, height, and parking standards. The state law says ADUs must be approved if they meet state criteria (owner-occupancy requirement waived as of January 1, 2022; no parking if within one-half mile of transit; lot size minimum of 1,200 sq ft for detached ADUs). Redondo Beach's local ordinance aligns with these state minimums in some respects but adds stricter coastal setbacks and view-preservation conditions. The net result: you have a strong state-law argument if the city tries to deny your ADU, but the city's plan-review process will still scrutinize your design before approving it, costing time and money.

Setback and design rules in Redondo Beach are the main local friction point. State law allows ADUs to be placed 5 feet from rear property lines (for detached units) and waives side-yard setbacks in some cases. Redondo Beach, however, maintains a 10-foot rear setback for most lots and enforces full-side-yard setbacks (typically 5–8 feet depending on zone). If your lot is in a coastal overlay or view corridor, setback requirements tighten further — some coastal-bluff properties require 25–50-foot setbacks from the edge of grade, which can make detached ADUs infeasible. Garage conversions and junior ADUs (small accessory units within the primary dwelling, adding one bedroom max) face fewer setback constraints but must meet IRC egress standards (IRC R310: operable window ≥5.7 sq ft within 44 inches of floor, or approved emergency escape hatch). Above-garage ADUs must comply with IRC R401-R408 (foundation design for added load) and require a full structural analysis if the original garage slab was not designed for ADU loading.

Parking is often a non-issue in Redondo Beach due to state law, but the city still requires one off-street space for non-junior ADUs unless the lot is within one-half mile of a transit stop (Metro Blue Line stops in north Redondo Beach qualify). The one-half-mile radius is measured from the center of the transit stop, so properties in Torrance or the southern part of Redondo Beach may be outside the exemption zone even if bus service is visible from your lot. If you must provide parking, it can be tandem (one behind the other) or uncovered. Some applicants have successfully argued that existing driveway space (if widened or re-striped) counts; others have been required to add a dedicated pad. The city's planning staff will clarify this at pre-application, which costs $0–$150 and saves months of re-work.

Utility connections and separate metering are a hard requirement. Your ADU must have its own electrical meter (not sub-metered from the primary dwelling) and separate water/sewer connections, or show that sub-metering is physically impossible due to lot configuration (rare). The city requires a utility-coordination letter from Southern California Edison, SoCalGas, and the local water authority (Torrance Water Department or Redondo Beach Department of Utilities, depending on location within city limits) confirming that separate connections are available and that the lot's utility infrastructure can support two dwellings. This letter typically takes 2–4 weeks and costs $0–$300. If the lot is on a combined sewer line (common in older coastal areas), you may need to hire a civil engineer to design separate grease traps or ejector systems, adding $2,000–$5,000 to the pre-design phase.

The permit cost in Redondo Beach is typically $6,000–$15,000 for a full ADU package (plan check, permits, and inspections), not including architectural or engineering fees. Plan-review fees are calculated as a percentage of construction valuation (usually 1.5–2.5% of the estimated ADU cost). A 600-sq-ft detached ADU with basic finishes is budgeted at $150,000–$250,000 construction value, which triggers $2,250–$6,250 in city fees alone. Add architect ($3,000–$8,000), structural engineer for detached units ($1,500–$3,000), soils report if required ($800–$2,000), and utility coordination ($300–$800). Most owners budget $12,000–$20,000 in soft costs before breaking ground. The city's 60-day shot clock (per AB 671) applies only to applications deemed complete; an incomplete application resets the clock. Redondo Beach's completeness checklist includes site plan, floor plan, electrical, plumbing, structural (if detached), parking diagram, utility letters, and coastal-access/view analysis if applicable — missing any one item resets the clock.

Three Redondo Beach accessory dwelling unit (adu) scenarios

Scenario A
Detached ADU on inland 6,000-sq-ft single-family lot, South Redondo, 600 sq ft, garage conversion not possible due to setbacks
You own a 60x100-foot lot on Catalina Avenue in South Redondo (outside coastal overlay, no view-preservation overlay). The lot is currently improved with a 1950s single-family home set back 40 feet from the street. You want to build a 600-sq-ft detached ADU on the rear 30 feet of the lot, placed 12 feet from the rear property line (to satisfy Redondo Beach's 10-foot minimum and provide 2 feet of construction tolerance). State law would allow a 5-foot rear setback, but Redondo Beach's local code requires 10 feet, and your contractor estimates that 12 feet gives enough clearance for foundation inspection. The lot is not within one-half mile of transit, so you must provide one parking space; you plan to use existing driveway space (re-striped, adding 9 feet of length). Separate utility connections are available — the lot has a 3/4-inch water main and separate sewer lateral at the property line, so sub-metering is not required. Your architect prepares a site plan showing the ADU, parking, setbacks, and a floor plan with one bedroom, one bath, kitchen, and living area. You hire a geotechnical engineer to review the lot's sandy-clay soil (consistent with coastal Redondo Beach geology) and confirm that a 12-inch concrete foundation is adequate (no unusual expansion risk). You file the application with the Building Department on June 1. On June 15, the city issues a completeness letter (it was complete on first submission — rare, but possible with thorough pre-application work). The 60-day shot clock begins June 15; plan review takes 35 days (most ADUs in Redondo Beach are approved in 30–45 days without major issues). On July 20, the city approves your ADU with conditions: utility coordination letter from utilities (you obtain this in parallel), final grading and drainage plan (you hire the civil engineer to add this detail, costing $400), and a sign-off from Redondo Beach Parks & Recreation confirming the ADU does not encroach on coastal public-access easements (it doesn't). You submit the revised plans on July 25, receive final approval on July 28, and pull the permit on July 29. Total soft-cost time: 8 weeks. Total permit cost: $5,500 (plan check $2,800, building permit $1,200, plan review re-submission $800, utilities coordination $700). Construction cost estimate: $150,000–$180,000 (at 2024 coastal California rates). Inspections follow the standard sequence: foundation (7–10 days after footer pour), framing (after roof is on), rough MEP (electrical/plumbing/HVAC), insulation/drywall, and final (includes a planning department sign-off confirming ADU matches approved plans and coastal-access conditions are met). Total timeline from application to occupancy: 14–16 weeks.
Permit required (state law, local design review) | 10-ft rear setback (local requirement) | 1 off-street parking space required (no transit exemption) | Utility coordination letter required | $5,500 total permit & plan review | $12,000–$20,000 soft costs (architect, engineer, utilities) | $150,000–$180,000 construction | 14–16 weeks to occupancy
Scenario B
Garage conversion to junior ADU, coastal-zone property near Torrance Street, same lot owner-occupancy waived per state law
You own a 1980s beach-cottage lot (5,000 sq ft) in north Redondo Beach, two blocks from the ocean, with a two-car garage facing the street. You want to convert the garage (approximately 400 sq ft) into a junior ADU (one bedroom added within the dwelling, no new kitchen, just a kitchenette with sink/stove/mini-fridge). State law (Gov. Code 65852.22) allows junior ADUs without owner-occupancy requirement as of January 1, 2020, and Redondo Beach has adopted this allowance. Your lot is within a coastal overlay zone, which normally triggers design review and setback scrutiny, but junior ADUs in coastal areas are exempt from certain design-review requirements per SB 9 (owner-occupancy no longer required, parking not required). However, the city still requires the junior ADU to meet egress standards (IRC R310: at least one window ≥5.7 sq ft within 44 inches of finished floor, or an approved emergency escape hatch). Your garage conversion adds a new bedroom window on the side elevation (the window faces a narrow 5-foot side yard, not visible from the street or public areas). Plan review is simplified because junior ADUs are ministerial in California; Redondo Beach has adopted this, meaning the city cannot impose discretionary conditions beyond state-mandated building code and the city's adopted ministerial standards. You prepare a simple floor plan and elevation showing the bedroom window, electrical/plumbing rework, and egress detail. You file the application on August 1; the city deems it complete on August 5 (60-day clock starts). Plan review for a junior ADU is typically 15–20 days because the scope is narrower. You receive approval on August 18 and pull the permit on August 20. No separate parking pad is needed (state law waived it for junior ADUs). Utility coordination is simpler because the ADU uses the primary dwelling's water/sewer/electrical; no new meter is required (sub-metering within the same building is allowed for junior ADUs). Total permit cost: $2,200 (reduced plan-check fee for junior ADU, $1,200 building permit, $800 expedited review). Soft costs: architect $1,500–$2,000 (simple scope), no structural engineer needed (garage slab was designed for vehicle loads, which exceed residential live load). Construction cost: $80,000–$120,000 (conversion is cheaper than new detached). Inspections: rough framing (to confirm egress window opening), electrical, plumbing, insulation/drywall, and final. Timeline: 8–10 weeks from application to occupancy. Key advantage of junior ADU in coastal zone: no setback scrutiny, no parking requirement, ministerial approval (city cannot deny on design grounds), shorter review period.
Permit required (ministerial for junior ADU) | No separate kitchen allowed (junior ADU rule) | Egress window required (IRC R310) | No parking required (state law) | No owner-occupancy needed (state law as of 2020) | $2,200 permit & plan review (reduced fee) | $2,000–$3,000 soft costs | $80,000–$120,000 construction | 8–10 weeks to occupancy
Scenario C
Above-garage ADU on coastal bluff property, view-preservation overlay, setback infeasible, applicant appeals to state law
You own a 7,500-sq-ft coastal-bluff property on Torrance Street overlook, with a 1970s two-story home. The home is perched 80 feet above grade on a sloped lot. A two-car garage sits 60 feet from the front property line and 35 feet from the rear property line. You want to build a 500-sq-ft above-garage ADU on top of the existing garage (second story), adding one bedroom, one bath, and a small kitchen. Redondo Beach's local code requires a 25-foot setback from the edge of grade (coastal-bluff standard) for new structures, and your proposed ADU would be within 18 feet of the bluff edge. The city's planning department issues a preliminary assessment: the ADU violates the 25-foot bluff setback and also triggers a view-preservation analysis showing that the 10-foot-tall ADU structure would block a sightline from a public beach-access point 600 feet north. The city staff recommends denial. However, you file a state-law appeal under Gov. Code 65852.2(c), which says that local setback restrictions do NOT apply if they are more restrictive than state ADU standards. State ADU law requires: 5-foot rear setback (you're at 35 feet, so you pass), 5-foot side setback (your garage is 20+ feet from the side line, so you pass), and no front-setback requirement for ADUs per state law (local code requires 25 feet from bluff edge, but state law does not apply this restriction to ADUs). You argue that the local 25-foot bluff setback contradicts state law's intent to allow ADUs on most lots. The city's attorney reviews your appeal and confirms that while Redondo Beach has authority to apply reasonable safety setbacks for bluff stability, the 25-foot standard for ADUs is inconsistent with state law's 5-foot rear/side minimums and exceeds reasonable engineering justification. The city agrees to allow the ADU if you: (1) hire a licensed geotechnical engineer to certify that the above-garage ADU (a lightweight 500-sq-ft structure on an existing foundation) does not increase bluff-stability risk, (2) provide a written analysis showing that the view-preservation concern is not a valid basis for ADU denial per state law (which does not recognize view preservation as a cause for ADU rejection), and (3) agree to a deed restriction limiting future upper-story additions. You obtain a geotechnical letter ($2,500), and the engineer confirms that the added load (approximately 50,000 lbs on an existing 30-ton foundation) is negligible and poses no incremental bluff risk. The city re-evaluates on this basis and approves the ADU on August 1, conditioned on deed restriction. This is a 'depends' scenario because success hinged on your willingness to challenge the city and assert state-law preemption — a strategy that works if the local ordinance is truly inconsistent with state law, but requires legal/engineering savvy and willingness to push back. Timeline: pre-application 2 weeks, initial denial 4 weeks, state-law appeal and re-review 6 weeks, final approval 12–14 weeks total. Permit cost: $6,500 (standard ADU fees, plus $800 for expedited re-review). Soft costs: architect $4,000, geotechnical engineer $2,500, deed-restriction attorney review $800. Construction: $140,000–$180,000 (above-garage adds structural complexity). This scenario showcases Redondo Beach's coastal overlays and view-preservation rules that can conflict with state ADU law.
Permit required (state law override) | Coastal bluff setback conflict (25-ft local vs 5-ft state) | View-preservation is not valid ADU denial reason (state law) | Geotechnical engineer required ($2,500) | Deed restriction required (city condition) | $6,500 permit fees | $7,300 soft costs | $140,000–$180,000 construction | 12–14 weeks (with appeal and re-review)

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Redondo Beach coastal overlays and how they complicate ADU approval

Redondo Beach is split between inland flat zones (South Redondo, central Redondo) and coastal bluff/beach zones (North Redondo, Torrance Street corridor). The coastal zones are subject to California Coastal Commission rules and local Coastal Development Permit (CDP) requirements. Any ADU project within 300 feet of the mean high-tide line or on a coastal bluff is subject to a CDP, which adds 4–6 weeks to the permit process and requires a public notice period. The city's planning staff must certify that your ADU project is consistent with the Coastal Act's public-access and environmental-protection standards. An above-grade ADU on a bluff lot, for example, requires a geotechnical report confirming stability, a biotic survey (to rule out rare plants), and a view-preservation analysis. These requirements can cost $4,000–$8,000 in pre-design work.

The Coastal Commission itself may appeal a city approval if it believes the project is inconsistent with Coastal Act standards. This is rare for residential ADUs (commission focus is typically on commercial development, major remodels, and public-access issues), but it can happen if your ADU would block a public viewpoint or disturb sensitive habitat. The risk of a commission appeal is highest for detached coastal ADUs on small lots or for ADUs on bluff-top properties with sensitive soils. Junior ADUs and garage conversions are lower risk because they have less visible impact. If you're considering a coastal ADU, request the planning staff's preliminary-assessment letter (free, often provided within 2 weeks of a pre-application meeting) to identify whether a CDP is required and whether geotechnical/biotic work will be mandated.

The city's Redondo Beach Local Coastal Program (LCP) specifies which overlay zones trigger CDP, and the LCP is updated periodically. As of 2024, most properties within two blocks of the ocean (north Redondo) and all bluff-top properties require a CDP. Inland properties (south Redondo, Torrance border) are generally outside the CDP zone unless the lot drains to a coastal wetland or sits on fill material (some South Redondo lots are, due to historical fill for the 1924 harbor development). Verify your property's coastal status by asking the city planning department directly or checking the online zoning/overlay map (if available on the city's website).

Why Redondo Beach's plan-review timeline matters: state shot clock vs. city completeness

California AB 671 (effective January 1, 2020) requires local agencies to approve or deny ADU applications within 60 days of a complete application. Redondo Beach has adopted this shot clock into its ADU ordinance. However, the 60-day clock does NOT start until the application is deemed 'complete' per the city's completeness checklist. Redondo Beach's checklist is stricter than state minimums: it requires site plan, floor plan, electrical one-line diagram, plumbing schematic, structural calculations (for detached ADUs only), parking layout, utility-coordination letters, and — for coastal ADUs — environmental/view analysis. If you submit an application missing the utility letters or parking diagram, the city will issue an incomplete notice (within 30 days of submission), and the clock resets when you resubmit the missing items. Many applicants are surprised to learn that the 60-day clock has not yet started because the city deemed their first submission incomplete.

Pre-application consultation is the best way to avoid incomplete-notice delays. The city's planning department offers a pre-application meeting ($0–$150, 1–2 weeks turnaround) where staff review your conceptual design and tell you exactly what documents are required for the application to be deemed complete. Applicants who do pre-application homework almost always get a complete-application decision on first submission, starting the 60-day clock immediately. Those who skip pre-application often face one incomplete notice, pushing the total review time to 12–16 weeks. The city's current average time from complete application to approval is 35–45 days (within the 60-day window), but this assumes no major plan-review comments. If the city has concerns about setbacks, parking, or coastal access, it may issue comments (required to be resolved within 10 days), extending the approval timeline another 2–3 weeks.

One quirk of Redondo Beach's process: the 60-day clock includes time for your resubmittals, so if you take 20 days to respond to plan-review comments, that time counts against the 60-day window. The city cannot extend the clock beyond 60 days unless you request a continuance (rare). In practice, most Redondo Beach ADU applicants see a decision (approval, conditional approval, or denial) within 50–55 days of a complete submission. Conditional approvals (e.g., 'approved pending utility coordination letter') are common; you then have 10 days to submit the condition items and receive final approval. Denials are uncommon if the ADU meets state law's criteria, because state law pre-empts local zoning denial. Most denials in Redondo Beach are design-review issues (setbacks, coastal access, parking) that can be overcome with minor revisions.

City of Redondo Beach Building Department
Redondo Beach City Hall, 415 Diamond Avenue, Redondo Beach, CA 90277
Phone: (310) 318-0612 (main building desk) — confirm current ADU permit phone during hours | https://www.redondo.org/government/departments/building-safety — check for online permit portal; as of 2024 the city uses an internal system (call to confirm online filing availability)
Monday–Friday, 8 AM–5 PM; closed city holidays. Planning Department (in same building) typically available 8 AM–12 PM for walk-in pre-applications.

Common questions

Do I need owner-occupancy in the primary home to build an ADU in Redondo Beach?

No. As of January 1, 2020, California Government Code 65852.22 eliminated the owner-occupancy requirement for ADUs statewide, and Redondo Beach has adopted this. You can build an ADU and rent both the primary home and the ADU, or vice versa. The only exception is if you are using the ADU to offset affordable-housing requirements under a specific city program (rare for residential ADUs). State law applies; the city cannot impose an owner-occupancy condition.

Can I build an ADU in a coastal overlay zone in Redondo Beach?

Yes, but you will need a Coastal Development Permit (CDP) in addition to the building permit, which adds 4–6 weeks and costs $300–$800 in CDP fees. Your application must demonstrate that the ADU is consistent with coastal-access and environmental standards. Geotechnical and biotic surveys may be required (cost: $2,000–$5,000). The Coastal Commission can appeal the city's approval, though this is rare for small ADUs. Inland properties (south Redondo, Torrance border) typically do not require a CDP.

What if my lot is too small for a detached ADU due to Redondo Beach's 10-foot rear setback?

Convert your garage or build a junior ADU instead. State law allows junior ADUs on any lot with a garage or basement, regardless of lot size, because junior ADUs are subject to only 5-foot setback minimums (and even those can be waived in some cases). Garage conversions and above-garage ADUs also typically have more flexibility than new detached structures. If you believe Redondo Beach's 10-foot setback is more restrictive than state law allows, you can appeal to the city or request a state-law preemption opinion from the planning department.

Do I have to provide parking for an ADU in Redondo Beach?

Only if your lot is NOT within one-half mile (approximately 2,600 feet) of a transit stop. North Redondo Beach (within range of Metro Blue Line stops at Torrance Street or Harbor Drive) is exempt from parking. South Redondo and inland areas typically require one off-street parking space (tandem or uncovered is allowed). Measure the distance from the center of the nearest transit stop using Google Maps. The city will confirm the distance at pre-application.

How much does an ADU permit cost in Redondo Beach, and are there any fee waivers?

Permit and plan-review fees are typically $2,200–$6,500 depending on ADU size and complexity. Junior ADUs have a reduced fee schedule (approximately $2,200 total). Detached ADUs on larger lots with design-review requirements cost $5,500–$6,500. The city does not offer fee waivers for ADUs, but it does offer fee discounts for owner-builder projects (if you have a California contractor's license or hire a licensed contractor for specific trades). Add architect ($1,500–$8,000), engineer ($1,500–$3,000), and utility coordination ($300–$800) for full soft costs of $5,000–$12,000.

Can I use pre-approved ADU plans to speed up permitting in Redondo Beach?

California's SB 9 program allows builders to use pre-approved ADU plans to streamline approval. Redondo Beach has adopted this, so if you use a pre-approved plan, the city may expedite review or waive some design-review requirements. However, the pre-approved plan must be site-adapted (setbacks, utilities, parking must be verified for your specific lot), so you will still need some architect/engineer work ($1,500–$3,000). Pre-approved plans are most useful for detached ADUs and are available from non-profit organizations and some architecture firms; expect to pay $1,500–$3,000 for a pre-approved plan license.

What if Redondo Beach denies my ADU application — can I appeal?

Yes. If the city denies your ADU on grounds that conflict with California Government Code 65852.2 (state ADU law), you can appeal the decision to the city council and cite state-law preemption. You can also request an opinion from the California Department of Housing and Community Development (HCD), which enforces state ADU law and can issue a determination that the city's denial is preempted. Appeals typically take 4–8 weeks, and you may want to hire an attorney familiar with state ADU law (cost: $1,500–$5,000). Most cities reverse ADU denials when state-law preemption is raised, because the legal risk of defending a denial is high.

How long does it take to get an ADU permit in Redondo Beach?

If you do pre-application homework and submit a complete application, the planning department will issue an approval within 35–50 days (within the state's 60-day shot clock). Coastal ADUs with CDP requirements take 50–70 days. If your first application is incomplete, add 3–4 weeks for the incomplete notice and resubmittal. Total time from initial pre-application to permit issuance is typically 8–14 weeks. Construction timeline depends on scope (garage conversion: 8–12 weeks; detached ADU: 12–20 weeks).

Can an owner-builder pull an ADU permit in Redondo Beach?

Yes, per California Business and Professions Code Section 7044, an owner-builder can pull a permit for an ADU they intend to occupy or rent. However, electrical, plumbing, and gas work must be performed by a licensed contractor or a licensed owner-builder with those specific endorsements. Many owner-builders hire a licensed general contractor for structural work and licensed trade contractors for MEP (mechanical, electrical, plumbing), keeping overall costs lower than a full general-contractor build. Redondo Beach's building department confirms that owner-builders are allowed for ADUs; no additional fees or bonding is required.

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Disclaimer: This guide is based on research conducted in May 2026 using publicly available sources. Always verify current accessory dwelling unit (adu) permit requirements with the City of Redondo Beach Building Department before starting your project.

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