ADU’s
ADU Construction in California
Smart Space. Solid Value. Built by Experts.
Accessory Dwelling Units (ADUs) are one of the smartest ways to expand your living space, generate passive income, or house loved ones—without buying a new property. At The Fireman Construction Inc, we specialize in designing and building ADUs that are fully code-compliant, beautifully crafted, and built to last.
Whether you’re adding a backyard cottage, converting a garage, or building a detached unit from the ground up, we guide you through the entire process from permits to final inspection.
What is an ADU?
An Accessory Dwelling Unit (ADU) is a secondary housing unit built on the same lot as an existing single-family or multi-family home. Common types of ADUs include:
Detached ADUs – Standalone backyard homes or cottages
Attached ADUs – Built as an extension to the main home
Garage Conversions – Transforming existing garages into livable space
Basement or Interior Conversions – Using existing square footage for a legal rental unit or guest suite
Why Build an ADU?
ADUs are an increasingly popular choice across California for good reason:
Passive Income – Rent it out for monthly cash flow
Multi-Generational Living – Create private space for family without sacrificing closeness
Increase Property Value – A well-designed ADU adds long-term resale value
Flexible Use – Home office, guest house, studio, or short-term rental
Permitting Ease – California has relaxed ADU laws to encourage affordable housing solutions
Our ADU Services
We offer turnkey ADU design and construction, including:
Site evaluation and planning
Architectural and structural design
Permit processing and city approvals
Ground-up construction
Garage conversions
Utility hookups and integration
Full interior build-out (kitchen, bath, HVAC, etc.)
Final inspection and code compliance
Every ADU we build is designed for comfort, functionality, and seamless integration with your main home or lot layout. We ensure every detail is handled with care—from foundation to finishes.

Trusted. Proven. Always Ready.
At The Fireman Construction Inc, we’re more than just builders—we’re first responders to your construction needs. Whether it’s an emergency repair in the middle of the night or a dream home brought to life from the ground up, we deliver 20+ years of expert craftsmanship, around-the-clock service, and a commitment to excellence you can count on.
24/7 Emercency services
Based in Simi Valley and proudly serving all of California, we bring integrity, transparency, and passion to every nail, every beam, and every brick.
WHY CHOOSE US?
Your project deserves the best. Let The Fireman Construction Inc show you what true professionalism, speed, and quality look like.
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24/7 Emergency Service
We understand that disasters don’t wait for business hours. That’s why we offer around-the-clock emergency construction services, ready when you need us the most.
20+ Years of Experience
Our deep industry knowledge means fewer surprises, smoother processes, and top-tier craftsmanship on every job. We’ve built it all—from custom homes and ADUs to full commercial structures.
Licensed & Insured
Your peace of mind matters. We’re fully licensed (License #1107098) and carry proper insurance so you’re always protected.
Personalized Approach
No two projects are the same. We take time to understand your vision, goals, and budget, then tailor our approach for results that exceed expectations.
California-Wide Coverage
Based in Simi Valley, we proudly serve homeowners, investors, and businesses across the state of California with the same level of dedication and service.

Get in Touch with The Fireman Construction Inc
Let’s Build Something Together
Have a question, need a quote, or facing a construction emergency? We’re here to help—24/7. Whether you’re starting a new build, planning an ADU, remodeling your home, or need urgent assistance, our team is ready to respond with expertise, honesty, and care. Just fill out the form below and we’ll get back to you as soon as possible!