How big can an ADU be in Moreno Valley?

Detached ADUs in Moreno Valley can be up to 1,200 sq ft. Attached ADUs: 50% of primary home, max 1,200 sq ft. JADUs up to 500 sq ft.

How much does it cost to build an ADU in Moreno Valley?

Build costs typically range $110,000 – $230,000, or $160 – $230 per square foot.

Verified March 14, 2026

ADU Regulations in Moreno Valley, California

Q: What are the setback requirements for ADUs in Moreno Valley?

Front: Same as primary dwelling. Side: 4 ft. Rear: 4 ft.

Riverside County · CA · Pop. 210,000

Max ADU Size

1,200

sq ft detached

Rear Setback

4 ft

Permit Timeline

60 days

Build Cost

$110,000 – $230,000

Zoning

Allowed ADU Types

✓Detached ADU

✓Attached ADU

✓JADU (Junior ADU)

✓Garage Conversion

Max per lot: 2 ADUs✓ No owner-occupancy required

ADUs allowed by-right per California state law

Source: City of Moreno Valley — Accessory Dwelling Units · Moreno Valley Municipal Code Section 9.10.030

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

side

4 ft

rear

4 ft

Max height: 16 ft

Lot coverage: Per underlying zone

Moreno Valley's newer residential developments may have HOA restrictions

Permitting

Permit Process

Department

Moreno Valley Community Development Department

Review Timeline

60 days

Permit Fees

$4,500 – $10,000

Impact Fees

Impact fees waived under 750 sq ft

Required Documents

›Site plan
›Floor plans
›Elevations
›Title 24 energy compliance
›Structural drawings (new construction)

Online permit portal available at Moreno Valley's ePlanning system

Visit Moreno Valley Community Development Department →

Infrastructure

Utilities & Requirements

Solar

Required

Parking

Not required

Separate Meter

Optional

Fire Sprinklers

See note

Sewer: Eastern Municipal Water District; connect to existing lateral

Fire Sprinklers: Not required unless primary structure requires them

Parking: No additional parking required

Financials

ADU Costs in Moreno Valley

Typical Build Cost

$110,000 – $230,000

Cost per Sq Ft

$160 – $230

Monthly Rental

$1,200 – $2,000/mo

Property Value Added

Adds $100,000 – $190,000 to property value

Available Grants & Programs

★CalHFA ADU Grant Program available

Moreno Valley offers affordable construction costs with good access to IE labor market

Use the free ADU Cost Calculator →

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Disclaimer: Information is compiled from publicly available municipal codes for general informational purposes only. It does not constitute legal, zoning, or construction advice. Regulations change frequently. Always verify with your local planning department. Last verified: March 14, 2026. Verify with Moreno Valley Community Development Department

Explore More

Nearby Cities in Riverside County

Riverside

Max 1,200 sq ft · $110,000 – $240,000

Corona

Max 1,200 sq ft · $145,000 – $300,000

Murrieta

Max 1,200 sq ft · $145,000 – $295,000

Temecula

Max 1,200 sq ft · $150,000 – $305,000

Jurupa Valley

Max 1,200 sq ft · $130,000 – $270,000

Menifee

Max 1,200 sq ft · $135,000 – $275,000

Moreno Valley Quick Facts

Max size1,200 sq ft
Rear setback4 ft
Permit timeline60 days
Build cost$110,000 – $230,000
Rental income$1,200 – $2,000/mo
Owner occupancyNot required

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Official Source

City of Moreno Valley — Accessory Dwelling Units

Moreno Valley Municipal Code Section 9.10.030

Last verified: March 14, 2026

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ADU rules change often.

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