Pasadena Master ADU Builder: Premier ADU Services in Pasadena, CA

Pasadena Master ADU Builder addresses the diverse needs of Pasadena homeowners, with specialized solutions for detached ADUs, attached ADUs, garage conversions, and junior ADUs. Whether you're looking to create a rental income stream (averaging 2,200−3,000 monthly in Pasadena), a private space for family members, or a dedicated home office, our experienced professionals deliver flawless, turnkey solutions that exceed expectations.

Building an ADU with Pasadena Master ADU Builder offers numerous benefits:


  • ADUs typically add 20-30% to your property's market value
  • Generate substantial passive income in Pasadena's strong rental market
  • Create independent living spaces for aging parents or adult children
  • Establish a professional, separate workspace on your property
  • Provide luxury accommodations for visitors without sacrificing privacy


As a locally owned and operated business in Pasadena, we understand local zoning regulations, building codes, and the specific requirements of the Pasadena Design & Planning Department. Our commitment to quality craftsmanship, transparent communication, and exceptional customer service has established us as Pasadena's premier ADU specialists. From initial feasibility studies through final inspection, we maintain clear communication, ensuring you're informed and confident throughout the entire process.

READ MORE

Our Comprehensive ADU Services in Pasadena, CA

Pasadena Master ADU Builder offers a complete range of services to guide you through every step of the ADU journey, from initial concept to final move-in.

ADU Design & Planning

Our in-house design team works with you to create a custom ADU that meets your specific needs, budget, and property constraints. Our design process includes:


  • Evaluation of your property's topography, existing structures, utilities, and solar orientation
  • Assessment of zoning regulations, setback requirements, and development standards specific to your property
  • Efficient layout design that maximizes livable space while meeting all code requirements
  • Photorealistic renderings that allow you to experience your ADU before construction begins
  • Guidance on selecting finishes, fixtures, and materials that balance aesthetics, durability, and budget
  • Integration of energy-efficient features, sustainable materials, and water conservation strategies


We specialize in designing ADUs that complement Pasadena's diverse architectural styles, from Craftsman and Spanish Colonial to Mid-Century Modern and Contemporary. Our designs not only look beautiful but also incorporate practical considerations like natural lighting, cross-ventilation, and indoor-outdoor flow that enhance livability in Southern California's climate.

ADU Permitting

Navigating the permitting process in Pasadena can be complex. We handle all aspects of permit acquisition, including plan preparation, submission, and communication with city officials, ensuring a smooth and timely approval.


Our permitting expertise includes:


  • Strategic consultations with city planners to identify and address potential issues early
  • Professional preparation of all required plans, calculations, and supporting documents
  • Specialized knowledge of additional requirements for properties in Pasadena's landmark districts
  • Expert handling of special circumstances requiring zoning variances or exceptions
  • Calculation of all permit fees, impact fees, and utility connection charges
  • Strategic approaches to minimize approval timelines
  • Scheduling and management of all required inspections throughout construction


Our relationships with Pasadena's planning and building departments, developed over years of successful projects, allow us to navigate potential roadblocks efficiently and keep your project moving forward.

New ADU Construction

We manage every aspect of the construction process, from site preparation and foundation work to framing, finishing, and landscaping. Our construction standards include:


  • Engineered foundations designed specifically for your soil conditions and ADU design
  • Precision framing with premium lumber and advanced techniques for structural integrity
  • High-performance insulation, weather barriers, and windows that exceed Title 24 requirements
  • Energy-efficient HVAC, plumbing, and electrical systems designed for comfort and efficiency
  • Enhanced insulation and construction techniques that minimize sound transmission
  • High-quality interior and exterior finishes that balance aesthetics and durability
  • Optional integration of home automation, security, and energy management systems
  • Thoughtful exterior design that complements your ADU while conserving water


Every construction project follows our rigorous quality control process with multiple inspection points beyond those required by the city, ensuring your ADU meets our exacting standards.

Garage Conversions

Transform your underutilized garage into a beautiful, functional living space. Garage conversions are a cost-effective way to add an ADU to your property. We handle everything from structural modifications and insulation to plumbing, electrical, and high-quality interior finishes. Our garage conversion expertise includes:



  • Evaluation of the existing structure to determine necessary modifications
  • Solutions for raising floors to accommodate plumbing while maintaining ceiling height
  • Installation of high-performance insulation in walls, floors, and ceilings
  • Strategic placement of new openings to maximize natural light and ventilation
  • Expert installation of new plumbing, electrical, and HVAC systems
  • Complete interior finishing including drywall, flooring, cabinetry, and fixtures
  • Facade improvements that integrate the converted garage with your main residence
  • Creative approaches to address off-street parking requirements when applicable


Our garage conversions maintain the highest standards of comfort, efficiency, and aesthetics, creating spaces that feel purpose-built rather than converted.

ADU Remodeling & Additions

Already have an older guest house or in-law unit? We can help you remodel or expand it to meet current codes and your evolving needs, transforming it into a modern, fully-functional ADU. Our remodeling and addition services include:



  • Code compliance updates to bring existing structures up to current building, energy, and safety codes
  • Layout optimization by reconfiguring spaces for improved functionality and flow
  • Updating outdated electrical, plumbing, and HVAC systems
  • Adding insulation, replacing windows, and improving overall performance
  • Thoughtful additions that increase living space while maintaining architectural integrity
  • Complete updating of finishes, fixtures, and appliances
  • Incorporating universal design principles for aging-in-place or accessibility needs
  • Creating connections between indoor and outdoor spaces with patios, decks, or gardens


We specialize in breathing new life into existing structures while preserving their character and maximizing their potential.

Types of ADUs We Build

We have experience building all types of Accessory Dwelling Units permitted in Pasadena:

Detached ADUs

A standalone unit, separate from the primary residence. Ideal for creating rental income or providing maximum privacy for occupants.


Key Features:


  • Size Range: 400-1,200 square feet (maximum allowed in Pasadena)
  • Typical Layouts: Studio, 1-bedroom, and 2-bedroom configurations
  • Privacy Benefits: Complete separation from main house with dedicated entrances and outdoor spaces
  • Design Flexibility: Freedom to create a distinct architectural style or match the main residence
  • Rental Potential: Highest rental value among ADU types due to complete privacy
  • Cost Range: 300−300-300−
  • 400 per square foot for new construction
  • Ideal For: Long-term rentals, housing for adult children or elderly parents who desire independence, home offices requiring client visits, or creative studios

Attached ADUs

An addition to the primary residence that shares at least one wall. A great option for keeping family members close while maintaining separate living quarters.


Key Features:


  • Size Range: 300-1,200 square feet
  • Typical Layouts: Efficiency units, 1-bedroom configurations, or primary suite expansions
  • Connection Benefits: Easier utility connections and potential for internal access between units
  • Design Integration: Seamless architectural connection with the main house
  • Cost Efficiency: Typically 10-15% less expensive than detached units due to shared walls and systems
  • Cost Range: 250−350 per square foot
  • Ideal For: Multi-generational families, caregiver accommodations, or semi-independent living arrangementss

Garage Conversion ADUs

The conversion of an existing garage into a habitable dwelling unit. Often the most cost-effective ADU type.


Key Features:


  • Size Range: Typically 240-400 square feet for single garages, 400-500 square feet for two-car garages
  • Typical Layouts: Studio or efficient one-bedroom designs
  • Cost Benefits: 30-40% less expensive than new construction due to existing foundation and structure
  • Timeline Advantage: Typically 2-3 months faster to complete than new construction
  • Transformation Potential: From basic conversions to high-end living spaces
  • Cost Range: 200−300 per square foot
  • Ideal For: Budget-conscious homeowners, shorter-term housing needs, or properties with limited space for new constructions

Junior ADUs (JADUs)

A small ADU (up to 500 sq. ft.) created within the existing footprint of the primary home. Requires an owner-occupancy clause.


Key Features:



  • Size Limitation: Maximum 500 square feet per Pasadena code
  • Efficiency Design: Compact layouts that maximize functionality
  • Integration Requirements: Must be created within the existing home's footprint
  • Kitchen Options: Can include efficiency kitchens or kitchenettes
  • Bathroom Flexibility: May have a dedicated bathroom or share with the main house
  • Cost Range: 100−200 per square foot, the most affordable ADU option
  • Ideal For: Housing a single family member, creating an efficient rental unit with minimal construction, or properties with limited lot spaces

Our ADU Building Process

1. Free Consultation

We start with a detailed discussion of your goals and a feasibility assessment of your property. This discussion covers the following:



  • On-site assessment of your lot's potential for an ADU
  • Analysis of applicable regulations and restrictions
  • Discussion of your specific requirements and preferences
  • Exploration of financial parameters and investment goals
  • Explanation of the typical project schedule and milestones

2. Design & Proposal

Our team develops a custom design and provides a detailed, fixed-price proposal for your review. The design phase may include:


  • Development of initial layout and exterior appearance
  • 3D visualization or creation of digital models showing your proposed ADU
  • Guidance on choosing finishes and fixtures
  • Comprehensive breakdown of all project costs
  • Development of clear, fair construction agreement

3. Permitting

We handle the entire permitting process with the City of Pasadena, which may include the following:


  • Creation of all required plans and calculations
  • Management of the complete submittal package
  • Communication with all relevant city departments
  • Addressing questions or requests from reviewers
  • Obtaining all necessary approvals before constructiont

4. Construction

Our professional crew builds your ADU with precision and care. We work on the following:


  • Proper preparation of the building area
  • Creation of a solid structural base
  • Precise construction of the structural framework
  • Installation of electrical, plumbing, and HVAC
  • Creation of the interior envelope
  • Installation of all interior and exterior finishes
  • Completion of all mechanical and electrical components

5. Final Walkthrough & Handover

We conduct a final inspection with you and hand over the keys to your brand-new ADU. The final phase may include:


  • Comprehensive review of all work
  • Education on operating all features and systems demonstrations
  • Delivery of warranties and maintenance information
  • Final approval or confirmation of your complete satisfaction
  • Official completion of your project

Client Testimonials

Frequently Asked Questions

  • How do I know if my property is eligible for an ADU in Pasadena?

    Most residential properties in Pasadena are eligible for at least one ADU. The basic requirements include: your property must be zoned for residential use; there must be an existing or proposed primary dwelling on the property; and you must have sufficient lot space to accommodate the ADU while meeting setback requirements. During our free consultation, we conduct a thorough analysis of your property's eligibility based on current Pasadena ADU ordinances, including lot size, zoning, setbacks, and any historic district considerations that may apply.

  • What are the current size limitations for ADUs in Pasadena?

    Detached and attached ADUs can be up to 1,200 square feet. Junior ADUs (JADUs) are limited to 500 square feet and must be within the existing footprint of the home. For lots with existing homes smaller than 1,600 square feet, the ADU may be up to 850 square feet for a studio or one-bedroom, or up to 1,000 square feet for a two-bedroom unit. These regulations are subject to periodic updates, and our team stays current with all changes to ensure your project complies with the latest requirements.

  • Are there parking requirements for ADUs in Pasadena?

    No, most ADUs in Pasadena do not require additional parking spaces under current regulations. Parking requirements are waived if your property is: within half a mile of public transit; in an architecturally and historically significant district; within one block of a car-share vehicle; or when the ADU is converted from an existing structure (like a garage). For situations where parking is required, typically one space per ADU is needed. Our team will assess your specific situation during the consultation phase and incorporate any necessary parking solutions into your design.

  • What are the setback requirements for ADUs in Pasadena?

    For detached new construction ADUs, Pasadena typically requires minimum setbacks of 4 feet from side and rear property lines. Front setbacks generally follow the requirements for the primary dwelling in your zone. For ADUs converted from existing structures (like garages), the existing setbacks can often be maintained even if they don't meet current standards. For ADUs in historic districts, additional considerations may apply. Our design team carefully analyzes your property's specific zoning requirements to maximize your ADU's size while ensuring full compliance with all setback regulations.

  • Can I build an ADU if my property is in a historic district?

    Yes, you can build an ADU in Pasadena's historic districts, but additional design guidelines and review processes apply. The ADU must be designed to be compatible with the historic character of both your primary residence and the neighborhood. This typically involves careful consideration of architectural style, materials, proportions, and placement on the lot. Our team has extensive experience navigating Pasadena's historic district requirements and can design an ADU that meets these additional standards while still providing the functionality you need.

  • How much does an ADU cost in Pasadena?

    On average, you can expect to invest between 200,000 and 400,000 for a complete ADU project in Pasadena. Specifically, new construction detached ADUs typically range from 300−300-300−400 per square foot (300,000−480,000 for a 1,000 sq. ft. unit). Garage conversions are more economical, typically ranging from 200−300 per square foot (100,000−150,000 for a standard two-car garage conversion). Junior ADUs are the most affordable option, often ranging from 100,000−150,000. These costs include design, permitting, construction, utility connections, and standard finishes. Factors that can affect your specific cost include site conditions, design complexity, finish level, and current material prices.

Our Latest News