ADU Regulations in Livermore, California
Alameda County · CA · Pop. 90,000
Max ADU Size
1,200
sq ft detached
Rear Setback
4 ft
Permit Timeline
60 days
Build Cost
$180,000 – $365,000
Zoning
Allowed ADU Types
Livermore is the eastern anchor of the Tri-Valley and home to Lawrence Livermore National Laboratory (LLNL) and Sandia National Laboratories. High-income science and technology workers create strong demand for quality rental housing. The city's wine country setting and downtown revitalization add lifestyle appeal.
Source: City of Livermore — Accessory Dwelling Units · Livermore Development Code Chapter 5.02, Section 5.02.060
Dimensions
Size & Setback Requirements
Detached
1,200
sq ft max
JADU
500
sq ft max
Attached
50% of primary home, max 1,200 sq ft
Setbacks
front
Same as primary dwelling per underlying zone
side
4 ft
rear
4 ft
Max height: 16 ft
Lot coverage: Per underlying zone; typically 40–50% in R-1 zones
Livermore's R-1 neighborhoods typically feature larger lot sizes than inner Bay Area cities, providing ample space for detached ADUs. Alley-accessed lots may allow reduced setbacks for alley-facing ADU placement.
Permitting
Permit Process
Department
City of Livermore Community Development Department — Planning Division
Review Timeline
60 days
Permit Fees
$9,000 – $18,000
Impact Fees
Impact fees waived for ADUs under 750 sq ft; proportional fees apply above that threshold
Required Documents
- ›Site plan (to scale, showing lot dimensions, all structures, setbacks)
- ›Floor plans
- ›Elevations
- ›Title 24 energy compliance (residential)
- ›Structural drawings
- ›Grading and drainage plan (for sloped lots)
Livermore's planning department accepts digital applications and has ADU-specific pre-application guidance available online. Zone 7 Water Agency serves Livermore — verify water capacity for new ADU connections. Tri-Valley construction market is competitive; schedule contractors early.
Visit City of Livermore Community Development Department — Planning Division →Infrastructure
Utilities & Requirements
Solar
Required
Parking
Not required
Separate Meter
Optional
Fire Sprinklers
See note
Financials
ADU Costs in Livermore
Typical Build Cost
$180,000 – $365,000
Cost per Sq Ft
$250 – $325
Monthly Rental
$1,900 – $3,000/mo/mo
Property Value Added
Adds $220,000 – $390,000 to property value
Available Grants & Programs
- ★CalHFA ADU Grant Program available (up to $40,000 for pre-development costs)
- ★Alameda County ADU assistance programs — check with county housing authority
LLNL and Sandia National Laboratories collectively employ thousands of high-wage workers, sustaining premium rental demand in Livermore. The Tri-Valley tech corridor (including Dublin and Pleasanton) amplifies demand. Wine country lifestyle appeal draws renters willing to pay for quality units near downtown Livermore's dining and entertainment scene.
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Livermore Quick Facts
- Max size1,200 sq ft
- Rear setback4 ft
- Permit timeline60 days
- Build cost$180,000 – $365,000
- Rental income$1,900 – $3,000/mo/mo
- Owner occupancyNot required
Official Source
City of Livermore — Accessory Dwelling UnitsLivermore Development Code Chapter 5.02, Section 5.02.060
Last verified: March 14, 2026
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