Welcome to Baumeister Construction — your trusted ADU Builder in Altadena, specializing in the design, permitting, and construction of custom ADUs (Accessory Dwelling Units), garage conversions, and backyard cottages for over 20 years.
Building an ADU in Altadena comes with its unique set of challenges, such as:
Complex zoning and permitting processes
Lack of experienced ADU builders familiar with local regulations
Delays, budget overruns, and communication breakdowns
Not maximizing the potential of available space
At Baumeister Construction, we remove these headaches by offering:
Expert handling of the entire ADU process, including permits
Custom ADU designs that suit your property and needs
Transparent pricing, realistic timelines, and clear communication
A trusted, professional team with extensive experience in ADU construction
We ensure your ADU project is handled with the utmost professionalism, efficiency, and care.
At Baumeister Construction, we offer a variety of services to transform your home inside and out. Whether it’s kitchen and bathroom remodeling, layout reconfiguration, flooring and tile work, or electrical and plumbing upgrades, we deliver quality results. We also specialise in drywall, painting, decorative finishes, doors, windows, molding, and exterior projects like roofing, driveways, decks, patios, and BBQ areas. For larger projects, we provide new construction and ADU development, ensuring every detail meets your vision.
Transform your kitchen into a stunning, functional space with our expert remodeling services. At Baumeister Construction, we combine quality craftsmanship with thoughtful design to bring your vision to life.
Optimize your space with our layout reconfiguration services. At Baumeister Construction, we redesign interiors to improve flow, functionality, and style, tailored to your needs.
Transform your bathroom into a stunning, functional space with our expert remodeling services. At Baumeister Construction, we combine quality craftsmanship with thoughtful design to bring your vision to life.
Ensure safety and efficiency in your commercial space with our expert electrical and plumbing services. At Baumeister Construction, we handle installations, upgrades, and repairs with precision.
Achieve flawless walls and vibrant finishes with our drywall and painting services. At Baumeister Construction, we ensure smooth surfaces and exceptional colour application to enhance your space.
Add elegance and character to your home with our decorative finishes. At Baumeister Construction, we specialise in custom details that bring style and sophistication to every space.
Led by a dedicated woman in LA County, our general contracting company is built on trust and focused on quality. We deliver exceptional results, innovate with sustainable practices, and consistently exceed client expectations, providing stress-free construction and renovation experiences.
At Baumeister Construction, we specialize in delivering high-quality ADU homes designed to add value, flexibility, and comfort to your property. Here’s why homeowners trust us for their ADU projects:
Over 20 years of construction and ADU experience
Full-service ADU project management—from design and permits to final construction
Expertise in smart layouts, space optimization, and modern ADU design
Sustainable, energy-efficient building practices
Commitment to quality craftsmanship, clear communication, and on-time delivery
With Baumeister Construction, your ADU home is in expert hands—combining technical expertise, thoughtful design, and personalized service to create a functional, beautiful living space that meets your needs and long-term goals.
(From the heart of Altadena)
Detached ADUs – Custom-built standalone ADUs for your backyard
Garage Conversions – Convert existing garages into livable spaces
Junior ADUs (JADUs) – Space-efficient, affordable solutions for small properties
ADU Design & Permitting – Full-service ADU design and handling of all permits
Accessory Dwelling Unit Construction – Full construction and renovation services
Altadena is a beautiful community with historical landmarks and nature-filled surroundings. Here are a few things to see and do:
Learn more about Altadena on Wikipedia
Typically, ADU projects take between 4-6 months, depending on design complexity and permitting.
Yes, we manage the entire permitting process, including zoning reviews, approvals, and required documentation.
Yes, many homeowners use ADUs as long-term rentals or for additional household flexibility, subject to local regulations.
Costs vary based on size, design, materials, and site conditions. We provide custom quotes tailored to each project.
Zoning requirements vary by jurisdiction. We handle all zoning and permitting requirements and guide you through what is allowed on your property.
Let’s design and build an ADU that adds long-term value to your property.
