Certified & Trusted by Industry Leaders
CA Contractor License #1082377
⭐ 5.0
on Google Reviews
What Oakland Homeowners Say
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Hamilton Exteriors made our ADU dream a reality. From permits to final walkthrough, they handled everything professionally. Our 600 sq ft backyard cottage was completed on time and our tenants love it!
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Michael T.
Rockridge, Oakland
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"We converted our detached garage into a beautiful 400 sq ft studio for my mother-in-law. The team navigated Oakland's permit process seamlessly."
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Sarah L.
Temescal, Oakland
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"Best decision we made for our property. Our 1,200 sq ft detached ADU now generates $3,200/month in rental income."
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David & Maria R.
Montclair, Oakland
Read All 50+ Reviews →
Our Services
ADU Services Built for Oakland Homeowners
Most Popular
Detached ADUs
Standalone backyard units up to 1,200 sq ft. Perfect for rental income or multigenerational living.
$180K – $350K
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Attached ADUs
Extensions connected to your main home up to 1,000 sq ft. Ideal for seamless family expansion.
$150K – $280K
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Best Value
Garage Conversions
Transform your existing garage into a livable 400-600 sq ft space. Fastest and most affordable option.
$80K – $150K
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Junior ADUs (JADU)
Create a 500 sq ft unit within your existing home footprint. Perfect for aging parents or young adults.
$60K – $120K
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Why Build an ADU in Oakland?
Flexibility. Savings. Long-term value.
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Oakland ADUs generate $1,500–$3,500/month in rental income. Perfect for supplementing your mortgage or building long-term wealth.
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Adding an ADU increases Oakland home values by 25–35% on average—that's $200K–$500K in added equity for most properties.
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Oakland's 60-day permit guarantee and no impact fees under 750 sq ft make it California's most ADU-friendly city.
Why Hamilton Exteriors
Oakland's Trusted ADU Experts
We've helped hundreds of Oakland homeowners add value to their properties with quality ADU construction
Recent ADU Projects in Oakland & the East Bay
See the quality craftsmanship and attention to detail in every project we complete
1,200 sq ft Detached ADU
Rockridge, Oakland
Garage Conversion
Temescal
800 sq ft Attached ADU
Montclair
Junior ADU (JADU)
Oakland Hills
600 sq ft Backyard ADU
West Oakland
2-Story ADU
Lake Merritt
View Our Full Portfolio →
Oakland Regulations
Why Oakland is California's Best City for ADU Construction
Streamlined permits, generous zoning, and city financing make Oakland one of the most ADU-friendly cities in the state.
15+
Years Experience
Deep local expertise navigating Oakland permits, codes, and building requirements
100%
In-House Team
No subcontractors or brokers—our own crew handles design, permits, and construction
50+
5-Star Reviews
Rated by real Oakland homeowners who trusted us with their ADU projects
1,200
sq ft max for detached ADUs
days max permit approval
60
$0
impact fees under 750 sq ft
$100K
city financing available
Hamilton Exteriors specializes in navigating Oakland's specific building codes—from the city's ADU ordinance requirements to Alameda County health and safety standards. Whether you're considering a detached backyard cottage, a garage conversion, or an attached addition, our team handles everything from initial feasibility studies through final city inspections.
Oakland Neighborhoods
ADU Construction Across Oakland
We build in every Oakland community with expertise in local zoning requirements
Rockridge & Temescal
Walkable neighborhoods with smaller lots. We specialize in maximizing ADU footprint while meeting setback requirements.
Oakland Hills & Montclair
Hillside ADUs require special foundation work. We navigate slope setbacks and fire-safe construction in WUI zones.
West Oakland & Jack London
Transit-oriented locations within ½ mile of BART eliminate parking requirements—more space for living.
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FAQ
Contact Us
Get Your Free Oakland ADU Consultation
Ready to add value to your Oakland property? Our team will call you within 24 hours to discuss your project.
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Call Us
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Email Us
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Visit Us
21634 Redwood Rd Unit F, Castro Valley, CA 94546
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Free, no-obligation consultation
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Licensed & insured (CA #1082377)
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Response within 24 hours
Related Resources
More Oakland ADU Resources
Explore cost guides, regulations, and neighborhood-specific ADU information
Nearby City
ADU Contractors in Berkeley, CA
Explore our ADU construction services in Berkeley, just minutes from Oakland.
Learn More →
Nearby City
ADU Contractors in San Leandro, CA
Quality ADU solutions for San Leandro homeowners in Alameda County.
Learn More →
Nearby City
ADU Contractors in Fremont, CA
Professional ADU design and construction services in Fremont.
Learn More →
Oakland's ADU Size Limits
Detached ADUs can be up to 1,200 sq ft or 50% of your primary dwelling. Attached ADUs allow up to 1,000 sq ft. Junior ADUs (JADUs) max out at 500 sq ft within your existing home.
Setbacks & Parking Rules
Oakland requires just a 4-foot setback from side and rear property lines. Detached ADUs are limited to 16 feet in height. No extra parking required if you're within half a mile of BART or bus stops.
Ready to Build Your Oakland ADU?
Get your free consultation and start adding value to your property today.
Bay Area's trusted ADU contractors. 15+ years building quality accessory dwelling units, from design to final inspection.
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CA License #1082377
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