Build Your Dream ADU with California's Most Trusted Builders
Generate $2,000-$4,000/month in rental income. Increase property value by 20-30%. Firefighter-owned with 200+ completed projects.
- 200+ ADUs Completed
- 30+ Years Experience
- 4.9 Google Rating
- Licensed Firefighter-Owned
Complete ADU Construction Services
From concept to completion, we handle every aspect of your ADU project across Los Angeles, Orange County, and Riverside counties.
Detached ADU Construction
Build a completely separate living unit in your backyard. Perfect for rental income or family housing with maximum privacy.
Garage Conversion
Transform your existing garage into a fully functional living space with proper insulation, electrical, plumbing, and HVAC.
200+
Projects Completed
4-6 Months
Average Timeline
$2K-$4K
Monthly Income
20-30%
Property Value Increase
Prefab ADU Installation
Faster construction with high-quality prefabricated units. Includes site preparation, delivery, and complete installation.
Custom Granny Flats
Traditional or modern granny flat designs tailored to your property. Ideal for multi-generational living solutions.
See the Transformation
Real projects from across Southern California showcasing our commitment to quality and design excellence.
Smart Investment for Your Property
ADUs represent one of the smartest real estate investments in California. Generate income while increasing your property value.
Rental Income
$2,000 - $4,000
Average monthly rental income in Southern California
Property Value
20-30% Increase
Typical property value appreciation with ADU
Rental Income
8-12% Annual
Return on investment in high-demand markets
Tax Benefits
30-Year Exempt
Rent stabilization exemption for new ADUs
Get Your Free ADU Consultation
Start your ADU journey today. Our experts will assess your property and provide a detailed project proposal.
What You'll Get:
- Free consultation and site assessment
- Transparent pricing with detailed cost breakdown
- Complete permit and approval handling
- 3D visualization before construction begins
- Dedicated project manager throughout build
- Comprehensive warranty coverage
Your information is secure and will never be shared. We typically respond within 24 hours.
What Our Clients Say
Hear from homeowners who’ve transformed their properties with Baldwin Builders.
“Baldwin Builders handled everything from permits to final inspection. The attention to detail was incredible, and our rental income now exceeds $3,200/month. Best investment we’ve made!”
Sarah M.
Manhattan Beach · Detached ADU
✔️ Verified Google Review
“After getting quotes from 5 contractors, Baldwin Builders offered the most comprehensive plan and transparent pricing. The project finished on time and on budget. Highly recommend!”
Michael R.
Orange County · Garage Conversion
✔️ Verified Google Review
“Their construction quality is unmatched. The team was professional, responsive, and delivered exactly what they promised. Our ADU turned out even better than we imagined!”
Jennifer L.
Los Angeles · Custom Granny Flat
✔️ Verified Google Review
Ready to Transform your property and join 200+ satisfied clients?
Frequently Asked Questions
Everything you need to know about ADU construction in Southern California.
How much does an ADU cost in Los Angeles and Orange County?
Projects typically range from $150,000 to $400,000 depending on size, complexity, and safety features. Garage conversions commonly range from $100,000 to $130,000, making them the most cost-effective option. Our fire safety upgrades add 5-10% to total costs but often reduce insurance premiums long-term.
How long does ADU construction take from start to finish?
Most projects take 4-6 months from permit submission to completion. Timeline varies based on project complexity, permit approval speed, and weather conditions. Our relationships with local fire departments often help expedite inspections.
Do I need special permits for ADU projects?
Yes, accessory dwelling unit development requires building permits and often planning approval depending on your local jurisdiction. We handle all permit applications, fire safety compliance documentation, and coordinate with city officials throughout the approval process.
Can I rent out my ADU for income?
Yes! ADUs built after 1978 receive a 30-year exemption from LA’s Rent Stabilization Ordinance, allowing you to set market-rate rents. Most of our clients generate $2,000-$4,000 monthly in rental income.
Will an ADU affect my property taxes?
Development will increase your property’s assessed value and taxes. However, rental income and property value appreciation typically far exceed the additional tax burden. We can provide detailed ROI projections for your specific property.
What makes Baldwin Builders different from other contractors?
We’re firefighter-owned with 30+ years of experience and 200+ completed ADUs. Our unique background means we incorporate fire safety features beyond code requirements, often resulting in insurance discounts. We also provide 3D visualization and dedicated project management throughout your build.
Ready to Build Your ADU?
Schedule your free consultation today and get a detailed project proposal within 48 hours.
Firefighter-Owned
Safety First Approach
30+ Years
Licensed & Insured
200+ ADUs
Completed Projects