ADU Build Los Angeles logo
Serving Santa Monica

ADU Design, Permits & Construction in Santa Monica

Santa Monica homeowners are generating $3,000–$4,500/month in rental income with custom ADUs. We handle every step — design, permits, and construction — in one of LA's most demanding permit environments.

Get a Free EstimateAll Locations
4.9 / 5 Rating
Google Reviews
Licensed & Insured
CA General Contractor
200+ ADUs Built
Across LA County
15+ Years
In Business
Why Santa Monica

Why Santa Monica Homeowners Are Building ADUs

Santa Monica sits at the center of one of Southern California's most desirable rental markets. Beach access, top-rated dining, major tech and media employers, and easy freeway and transit access drive consistent demand from high-income renters — making ADU rental income here particularly strong.

Studio and one-bedroom ADUs in Santa Monica typically rent for $2,800–$4,200/month. For a homeowner investing $180,000–$280,000 in a detached ADU, that represents a 12–18% gross annual yield — among the strongest ADU returns available anywhere in Greater Los Angeles.

  • Among the highest ADU rental rates in all of Greater Los Angeles
  • Strong year-round demand from tech, healthcare, and entertainment professionals
  • Proximity to LAX and the Westside job corridor drives premium rents
  • High underlying property values amplify the asset-value impact of an ADU
  • Excellent walk score and Big Blue Bus / Expo Line access attract car-free tenants
  • California ADU law and Santa Monica code allow ADUs on most single-family lots
$3,200/mo
Avg Studio ADU Rent
10–18 wks
Typical Permit Timeline
4 ft
Min Rear / Side Setback
1,200 sq ft
Max ADU Size
Permits & Zoning

ADU Permitting in Santa Monica

What Santa Monica homeowners need to know before starting an ADU project.

City of Santa Monica Planning & Community Development
ADUs in Santa Monica are permitted through the city's Planning and Community Development department. Santa Monica has adopted California's ADU law and allows ADUs on most single-family and eligible multifamily lots throughout the city.
Coastal Zone & Coastal Development Permits
Properties in Santa Monica's Coastal Zone may require a Coastal Development Permit (CDP) in addition to standard building permits. Our team navigates Coastal Commission requirements regularly and assesses your property's overlay status as part of the free site evaluation.
Historic District Design Guidelines
Some Santa Monica neighborhoods have historic preservation overlays with exterior design guidelines. We work within these requirements — using compatible materials and massing — to create ADUs that enhance rather than conflict with neighborhood character.
Permit Timeline
Standard ADU permitting in Santa Monica takes 10–18 weeks from a complete submission. Coastal Zone projects requiring CDP review add time. We prepare thorough, accurate submissions to minimize correction rounds.
Pricing in Santa Monica

ADUs Starting From $150,000

Santa Monica ADU construction reflects premium coastal LA pricing. Higher rental rates mean shorter investment payback periods. All-inclusive of design, permitting fees, and full construction.

  • Design, architecture & engineering included
  • Permitting and city approval management included
  • Full construction and site work included
  • Final inspection and certificate of occupancy included
Get a Custom Estimate
Junior ADU (JADU)
Within existing structure
$70,000 – $110,000
Garage Conversion ADU
Existing garage footprint
$90,000 – $165,000
Attached ADU
Addition to primary home
$140,000 – $240,000
Detached ADU
New standalone structure
$175,000 – $320,000

* All-inclusive pricing. Final cost depends on scope and site conditions.

Free Estimate

Get a Free Estimate for Your Santa Monica Property

We'll assess your property, review your Santa Monica zoning, and provide a detailed cost and timeline estimate — at no charge, with no obligation.

  • Santa Monica-specific feasibility review for your lot
  • Realistic all-inclusive cost range for your ADU type
  • Timeline from design through certificate of occupancy
  • Response within 1 business day

Also serving nearby

VeniceMar VistaBrentwoodPacific PalisadesMarina del Rey

Request Your Free Estimate

We'll be in touch within 1 business day.

No spam, ever. We respond within 1 business day.

Common Questions

ADU Questions for Santa Monica Homeowners

Can I build an ADU in Santa Monica's Coastal Zone?
Yes, ADUs can be built in the Coastal Zone, but projects may require a Coastal Development Permit (CDP) in addition to standard building permits. Our team handles CDP applications regularly. We assess whether your property requires one as part of the free property evaluation — at no cost to you.
How long does ADU permitting take in Santa Monica?
Standard ADU permitting in Santa Monica takes 10–18 weeks from plan submission. Coastal Zone projects involving a CDP review may require additional time depending on California Coastal Commission workload. We manage all submissions and correction responses on your behalf.
What rental income can I expect from a Santa Monica ADU?
Studio ADUs in Santa Monica typically achieve $2,800–$3,500/month. Well-designed one-bedroom ADUs often rent for $3,500–$4,500/month. Annual gross rental income of $34,000–$54,000 is achievable with a quality ADU in most Santa Monica neighborhoods.
Do HOAs in Santa Monica restrict ADUs?
California law (AB 3182) limits HOA authority to prohibit ADUs where they're otherwise legally permitted. HOAs may have aesthetic guidelines but cannot outright prevent you from building. We can review your HOA documents during the property assessment to clarify any applicable rules.

Need help planning your ADU project?

Talk with an ADU specialist

Why ADU Build LA

ADU Expertise You Can Count On

We've built ADUs across Santa Monica and the surrounding area — navigating local zoning, permit processes, and site conditions that generalist contractors don't know.

Our Services

ADU Services Available in Santa Monica

ADU Plans & Design

ADU Plans & Design

Custom ADU plans and architectural design tailored to your property and Los Angeles zoning requirements — from initial concept to permit-ready drawings.

Learn more
ADU Permits & Approvals

ADU Permits & Approvals

We manage the full ADU permitting process across Los Angeles and LA County — plan check, corrections, and final approval handled end to end.

Learn more
Detached ADU Construction

Detached ADU Construction

New-construction detached ADUs in Los Angeles — from foundation to certificate of occupancy. Full-service design, permitting, and construction under one contract.

Learn more
Santa Monica Guides

Santa Monica-Specific ADU Services

Detailed local guides covering permits, pricing, and timelines specific to Santa Monica.

Garage Conversion ADU

Convert Your Santa Monica Garage Into a Premium ADU

Convert your Santa Monica garage into a fully permitted ADU. Coastal Zone expertise, premium design, and a fixed-price contract. Free property assessment.

View guide
From Our Portfolio

ADU Projects in Santa Monica

Real completed projects from our team in Santa Monica — see the challenge, solution, and results.

Completed Project

Santa Monica Garage Conversion ADU

A 2-car detached garage transformed into a coastal-style one-bedroom ADU — permitted through Santa Monica's Coastal Zone process and earning $3,200/month in rental income.

View
Browse all projects

Planning an ADU in Santa Monica?

Design your ADU in our interactive configurator — choose type, size, style, and finishes. Get a matching floor plan and budget estimate before you talk to anyone.

Plan your ADU
Ready to Start?

Build Your ADU in Santa Monica

Join over 200 Los Angeles homeowners who have added rental income and lasting property value with an ADU from ADU Build LA. Your free estimate is the first step.

Request a Free EstimateExplore Our Services

Learn about our process as a full-service ADU design-build company serving all of Los Angeles County.

Get Free EstimateCall Now