Permitting · 9 min read · May 30, 2026 · 343 words
Long Beach ADU cost and permits in 2026: the field guide
Long Beach permit timelines, fees, utility-connection reality, and the 2026 cost ranges for garage conversions, detached studios and 2-bedroom ADUs across [Long Beach neighborhoods](/adu/long-beach).
Key takeaways
- Garage conversion (400 sq ft) — $140K–$185K all-in.
- Detached studio (480 sq ft) — $215K–$255K all-in.
- Detached 1-BR (750 sq ft) — $285K–$340K all-in.
Answered in this guide
Jump straight to the question you came in with — every answer is on this page, with links onward to the deeper guide.
- What is SB-9 and does it apply to me?
- What about hillside or coastal lots?
- I'm in an HPOZ — can I still build?
- Do you handle the permitting?
- What setbacks and height limits apply?
- How long does an ADU project take in Los Angeles?
More across the studio · the full FAQ map · the reference desk
Long Beach is one of the most permit-friendly major Southern California cities for ADUs in 2026. Ministerial review issues in 10–14 weeks on conforming projects, fees run $4.8K–$8.5K (well below LA City), and the Long Beach city page tracks current zoning overlays. This guide pairs the 2026 cost ranges with the permitting reality so you can budget a Long Beach build correctly.
2026 cost ranges across products
- Garage conversion (400 sq ft) — $140K–$185K all-in.
- Detached studio (480 sq ft) — $215K–$255K all-in.
- Detached 1-BR (750 sq ft) — $285K–$340K all-in.
- Detached 2-BR (1,000 sq ft) — $355K–$420K all-in. Highest ROI on most lots.
Permitting workflow
Long Beach Development Services handles ADU plan check ministerially when the project meets state law (≤800 sq ft, ≤16 ft height, 4 ft side/rear setbacks). Plan check averages 6–9 weeks for a complete submittal. Coastal Zone projects (south of PCH and in Belmont Shore) add California Coastal Commission review and 8–14 weeks. See the LA permit timeline guide for a comparable week-by-week framework.
Utility connection: the LB Water and LB Energy story
Long Beach Water charges a 5/8-inch meter connection fee of roughly $3.5K–$5.5K for a new detached ADU. Long Beach Energy (the city's natural gas utility) typically does not require an upgrade for ADU service, which is one reason Long Beach builds finish 2–4 weeks faster than equivalent LA City projects. Edison serves electric; panel upgrades to 200A run $4.5K–$7K plus permit.
Where Long Beach pencils best
- Bixby Knolls and California Heights — large flat lots, strong rents, easy permitting.
- Wrigley and West Long Beach — lowest entry pricing, garage conversions dominant.
- Belmont Shore and Naples — high rents but Coastal Commission overhead; expect 18–26 weeks total.
- Los Cerritos and Bixby Hill — luxury detached 2-BRs commanding $4,200+/mo rents.
Next steps
Pull APN, zoning, and coastal-zone status before committing to a product. Use the cost breakdown to test sensitivity, then book a consultation for a fixed-fee Long Beach feasibility report.
Sources
- Long Beach Development Services ADU · City of Long Beach
- Long Beach Water rates · Long Beach Water
Next chapter · 01 of 02
Cost · 9 min read
The anatomy of an LA ADU build, line by line
Pair Long Beach's friendlier permitting with LA County's broader 2025 rules to see the full regional picture.
Where every dollar of a $325,000 detached 800 sq ft ADU actually goes — soft costs, hard costs, contingencies, and the line items that surprise homeowners most.
FAQ · Permitting
Common questions on permitting
The questions readers send us most after this guide.
What is SB-9 and does it apply to me?
SB-9 (the California HOME Act) lets eligible single-family lots split into two parcels and/or add a duplex. We assess eligibility during the feasibility call — roughly 60% of LA single-family lots qualify on paper, fewer in practice once HPOZ, hillside, and coastal overlays are applied. SB-9 projects can stack with an ADU for up to four units on what was a single-family lot.What about hillside or coastal lots?
Hillside requires a Methane District review (where applicable) plus a haul route plan if grading exceeds 1,000 cubic yards. Coastal Zone projects (anything west of Lincoln Blvd in Venice, for example) need a Coastal Development Permit on top of standard LADBS approval. Both are workable; both add 60–90 days.I'm in an HPOZ — can I still build?
Yes, but with design review. Historic Preservation Overlay Zones require Certificate of Appropriateness from the cultural heritage commission before permits issue. We've shepherded projects through Miracle Mile, West Adams, Whitley Heights, and Spaulding Square HPOZs. Add 8–12 weeks for the COA process.Do you handle the permitting?
Yes. We file with LADBS or your local building department, manage plan check, coordinate utility upgrades, schedule inspections, and deliver final sign-off. You don't visit the counter, we do.What setbacks and height limits apply?
Statewide ADU law (AB 68/881) overrides most local restrictions: 4-foot side and rear setbacks, 16-foot height for detached one-story, 18-foot for two-story within ½ mile of transit. Front setbacks follow the underlying zone. We model your envelope at the schematic stage.How long does an ADU project take in Los Angeles?
Most detached ADUs run 9–13 months from contract to certificate of occupancy. Garage conversions are typically 4–6 months. Permitting alone is usually 60–120 days at LADBS depending on whether we use a pre-approved standard plan or a custom design that needs full plan check.
Reference desk · Permitting
More answers from the California reference desk
City-specific questions pulled from our 5,000-answer FAQ corpus — every link opens a deeper desk page.
How long does a ADU permit take in Beverly Hills?
City of Beverly Hills Community Development runs plan check 120–180 days on a complete, code-conformant submittal for a ADU. First-cycle approvals depend on three things: a stamped structural set, a Title 24 energy report bound into the package, and a site plan with verified setbacks. Most slippage comes from missing one of those three on first submittal.Why do ADU permits get rejected in Beverly Hills?
In Beverly Hills, the five most common first-cycle corrections are: (1) Title 24 energy compliance not bound to the submittal, (2) site plan setback math off by inches, (3) structural calcs not stamped by a CA-licensed engineer, (4) utility load calculations missing for the panel upgrade, and (5) drainage/grading not addressed for impervious-surface adds. Fixing all five before submittal cuts 120–180 days off the schedule.Does state ADU law override Beverly Hills rules for my ADU?
For qualifying ADU and JADU scopes, California Government Code §65852.2 and §65852.22 preempt most local discretionary review — Beverly Hills cannot impose owner-occupancy requirements (banned by AB 976), most parking minimums near transit, or stylistic design review. Local jurisdictions still control building-code application, Title 24, utility connection, and impact fee schedules. Non-ADU scopes (full additions, remodels, hillside builds) remain fully under local control.Are pre-approved standard plans available in Beverly Hills for a ADU?
Where Beverly Hills has adopted a pre-approved standard ADU plan program, using one cuts plan check by 30–60 days and removes the structural review fee. For programs that exist (LADBS, San Jose, San Diego), the trade-off is that floor-plan changes void the pre-approval. Most owners are better off using a standard plan as a starting point and accepting the layout it ships with.How long does a garage conversion permit take in Beverly Hills?
City of Beverly Hills Community Development runs plan check 120–180 days on a complete, code-conformant submittal for a garage conversion. First-cycle approvals depend on three things: a stamped structural set, a Title 24 energy report bound into the package, and a site plan with verified setbacks. Most slippage comes from missing one of those three on first submittal.Why do garage conversion permits get rejected in Beverly Hills?
In Beverly Hills, the five most common first-cycle corrections are: (1) Title 24 energy compliance not bound to the submittal, (2) site plan setback math off by inches, (3) structural calcs not stamped by a CA-licensed engineer, (4) utility load calculations missing for the panel upgrade, and (5) drainage/grading not addressed for impervious-surface adds. Fixing all five before submittal cuts 120–180 days off the schedule.Does state ADU law override Beverly Hills rules for my garage conversion?
For qualifying ADU and JADU scopes, California Government Code §65852.2 and §65852.22 preempt most local discretionary review — Beverly Hills cannot impose owner-occupancy requirements (banned by AB 976), most parking minimums near transit, or stylistic design review. Local jurisdictions still control building-code application, Title 24, utility connection, and impact fee schedules. Non-ADU scopes (full additions, remodels, hillside builds) remain fully under local control.Are pre-approved standard plans available in Beverly Hills for a garage conversion?
Where Beverly Hills has adopted a pre-approved standard ADU plan program, using one cuts plan check by 30–60 days and removes the structural review fee. For programs that exist (LADBS, San Jose, San Diego), the trade-off is that floor-plan changes void the pre-approval. Most owners are better off using a standard plan as a starting point and accepting the layout it ships with.How long does a JADU permit take in Beverly Hills?
City of Beverly Hills Community Development runs plan check 120–180 days on a complete, code-conformant submittal for a JADU. First-cycle approvals depend on three things: a stamped structural set, a Title 24 energy report bound into the package, and a site plan with verified setbacks. Most slippage comes from missing one of those three on first submittal.
Sources & further reading
- California Government Code §65852.2 — statewide ADU framework (ministerial review, 60-day clock).
- LADBS — Accessory Dwelling Unit information bulletins and current permit fee schedule.
- HCD — California Department of Housing & Community Development, ADU handbook (2024 update).
- Internal data: 120++ ADU projects delivered across Los Angeles County, 2018–2025.
Continue your read · the editorial path
We chained these chapters in the order LA homeowners actually need them. Each one picks up where the last one left a question open.
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