What does an ADU cost to build in Beverly Hills in 2026?

Beverly Hills ADUs run $237.6K-$594K in 2026 — the Ultra tier adds +32% to LA baseline. Most 90210 detached 800-1,000 sqft builds land $332.6K-$475.2K. Hillside-ordinance grading review applies on most sloped lots and commonly adds 4-8 weeks and $10K-$25K to the project.

Where do Beverly Hills ADU permits get processed?

City of Beverly Hills (independent jurisdiction) handles all plan-check for Beverly Hills — not LADBS. State ADU ministerial review under AB 130 still applies (60 business days to decision), and SB 543 mandates a 15-business-day completeness check. Independent-city review often runs the full statutory window rather than beating it.

Can I fit a 1,200 sqft ADU on my Beverly Hills lot?

Most 90210 lots are around 12,000 sqft, which comfortably supports a 1,200 sqft detached ADU with the 4 ft side and rear setbacks. State law caps detached ADUs at 1,200 sqft; side and rear setbacks are 4 ft minimum, with 5 ft separation from the main structure for fire code. Hillside-ordinance grading review on sloped lots adds 4-8 weeks and $10K-$25K. On the typical 90210 parcel, setback math usually binds before the 1,200 sqft cap.

How long does an ADU take in Beverly Hills?

Design runs 10-14 weeks before submittal. Plan check: 14-20 weeks is common in independent jurisdictions — the city uses the full AB 130 window rather than beating it. Construction is 20-36 weeks. Total elapsed: 14-22 months for a standard detached ADU in 90210. LADBS Standard Plan Program pre-approved designs shave roughly 4-6 weeks off the plan-check leg when the design fits. Hillside-ordinance grading review applies on most sloped lots and commonly adds 4-8 weeks and $10K-$25K to the project.

Does SB 543 save me money on a Beverly Hills ADU?

Yes, if the ADU is 750 sqft or smaller. SB 543 (2025) eliminates all development impact fees for ADUs up to 750 sqft and JADUs of any size statewide — no exceptions by jurisdiction. In 90210 that saves $15K-$40K on LADBS, school district, and utility capacity fees. Many Beverly Hills owners now scope toward 750 sqft specifically to capture the waiver.

Do Beverly Hills ADUs need solar under Title 24?

New detached ADUs typically do. Title 24 2023 requires solar PV on new detached ADUs. A 3-4 kW system typically adds $9K-$16K after the federal ITC. Attached ADUs that share a roof with the main structure can often fall under the primary home's existing compliance path rather than triggering new solar. 90210 homeowners scoping a detached build should budget for PV upfront, not as an add-on.

What's the utility gotcha on older Beverly Hills ADUs?

Most pre-1975 Beverly Hills homes have 3/4-inch water service and 4-inch sewer laterals sized for a single SFR. Adding an ADU without upsizing causes low pressure and sewer backups once the unit is occupied — upgrade cost runs $5K-$25K. Inspectors flag undersized laterals at rough plumbing, so catching this in scoping saves 2-4 weeks of rework. The city inspectors in 90210 are consistent about enforcement.

Can I sell my Beverly Hills ADU separately as a condo?

Beverly Hills is an independent jurisdiction and as of 2026 has not formally adopted AB 1033, so ADU condo sales are not yet available here. The pathway requires formal condo map, HOA formation, and title work — budget $15K-$40K in legal and surveying on top of construction. Most 90210 owners rent instead; the condo path makes sense primarily for estate planning or a specific cash-out event. Long-term rental is the dominant monetization route.

ADU construction in Beverly Hills

Beverly Hills is an independent jurisdiction with its own permit process, stricter tree ordinance, and North-of-Sunset hillside review — plan-check is typically 8–14 weeks longer than city-of-LA equivalents.

Beverly Hills cost range

$238K–$594K

32% above LA County median

Permit office

City of Beverly Hills (not LADBS — separate jurisdiction)

Typical lot

12,000 sqft

ZIP

90210

Very High Fire Hazard zoneHillside ordinance

Start your Beverly Hills scope — Baily asks the right questions.

Pre-seeded for adu construction in Beverly Hills. Mention your lot, your timeline, and any known constraints — Baily factors the city permit queue and WUI fire-zone into the scope.

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“A string of bright beads of sunlight, breaking through the valleys along the moon’s rim.”

— Francis Baily, 1836

Origin

Who is Baily?

Baily is named after Francis Baily — an English stockbroker who retired at 51, became an astronomer, and in 1836 described something on the edge of a solar eclipse that nobody had properly articulated before: a string of bright beads of sunlight breaking through the valleys along the moon’s rim.

He wasn’t the first to see them. Edmond Halley saw them in 1715 and barely noticed. Baily’s contribution was clarity — describing exactly what was happening, in plain language, so vividly that the whole field of astronomy paid attention. The phenomenon is still called Baily’s beads.

That’s what we wanted our AI to do. Every inbound call and text has signal in it — a homeowner’s real question, a timeline, a budget, a hesitation that means “yes but.” Baily listens to every one, 24/7, and finds the beads of light.

Baily was a businessman before he was a scientist. That’s our vibe too.

Questions LA homeowners actually ask

Beverly Hills ADUs run $237.6K-$594K in 2026 — the Ultra tier adds +32% to LA baseline. Most 90210 detached 800-1,000 sqft builds land $332.6K-$475.2K. Hillside-ordinance grading review applies on most sloped lots and commonly adds 4-8 weeks and $10K-$25K to the project.
Most 90210 lots are around 12,000 sqft, which comfortably supports a 1,200 sqft detached ADU with the 4 ft side and rear setbacks. State law caps detached ADUs at 1,200 sqft; side and rear setbacks are 4 ft minimum, with 5 ft separation from the main structure for fire code. Hillside-ordinance grading review on sloped lots adds 4-8 weeks and $10K-$25K. On the typical 90210 parcel, setback math usually binds before the 1,200 sqft cap.
Design runs 10-14 weeks before submittal. Plan check: 14-20 weeks is common in independent jurisdictions — the city uses the full AB 130 window rather than beating it. Construction is 20-36 weeks. Total elapsed: 14-22 months for a standard detached ADU in 90210. LADBS Standard Plan Program pre-approved designs shave roughly 4-6 weeks off the plan-check leg when the design fits. Hillside-ordinance grading review applies on most sloped lots and commonly adds 4-8 weeks and $10K-$25K to the project.
Most pre-1975 Beverly Hills homes have 3/4-inch water service and 4-inch sewer laterals sized for a single SFR. Adding an ADU without upsizing causes low pressure and sewer backups once the unit is occupied — upgrade cost runs $5K-$25K. Inspectors flag undersized laterals at rough plumbing, so catching this in scoping saves 2-4 weeks of rework. The city inspectors in 90210 are consistent about enforcement.
Beverly Hills is an independent jurisdiction and as of 2026 has not formally adopted AB 1033, so ADU condo sales are not yet available here. The pathway requires formal condo map, HOA formation, and title work — budget $15K-$40K in legal and surveying on top of construction. Most 90210 owners rent instead; the condo path makes sense primarily for estate planning or a specific cash-out event. Long-term rental is the dominant monetization route.