ADU Constructions

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Testimonials

ADU construction site with workers building a backyard accessory dwelling unit.

D&D Home Remodeling

Custom Accessory Dwelling Unit Construction for Smart Property Expansion

Adding more living space to your property can improve flexibility, comfort, and long-term value. Whether you live near the iconic San José City Hall, the bustling San Pedro Square Market, or the scenic Guadalupe River Park, Accessory Dwelling Units (ADUs) are a practical solution for homeowners who need extra space for family members, rental income, or private work areas.

At D&D Home Remodeling, we provide professional Accessory Dwelling Unit construction services designed to expand your property efficiently and safely. From planning to final construction, our team ensures every ADU project is built with quality materials and proper structural support.

About D&D Home Remodeling

D&D Home Remodeling has been delivering reliable remodeling and construction services since 2009. Over the years, we have built a strong reputation for skilled workmanship and dependable project management.

We believe in clear communication, organized planning, and transparent pricing. Every project receives careful attention from start to finish. Our goal is to create durable and functional spaces that meet the needs of modern homeowners.

Since 2009, we have remained committed to helping property owners improve and expand their homes with confidence.

Skilled worker building an ADU at a construction site in San Jose.

Complete ADU Construction Services

Accessory Dwelling Units require careful planning, proper permits, and professional construction. Our team handles the entire process to ensure a smooth and well-managed project.

We build detached ADUs, attached ADUs, garage conversions, and backyard units. Each project begins with a detailed consultation and property assessment. We evaluate available space, structural requirements, and local building standards before creating a clear construction plan.

Our goal is to design and build an ADU that blends well with your existing property while maximizing usable space.

Detached and Attached ADU Solutions

Every property is different, which is why we offer both detached and attached ADU options.

Detached ADUs provide privacy and independence, making them ideal for rental use or extended family living. Attached ADUs connect directly to the main house and offer convenient access while maintaining a separate living area.

Our team ensures proper foundation work, insulation, and structural integrity for long-term durability and safety.

ADU construction with scaffolding and workers on-site in San Jose.
ADU Construction Frame in San Jose for Home Expansion.

Garage Conversions for Efficient Space Use

Converting an existing garage into an ADU is a cost-effective way to create additional living space. It allows homeowners to use existing structures while reducing construction time.

We carefully inspect the current structure and reinforce it as needed. Proper insulation, plumbing, electrical installation, and ventilation are completed to meet residential standards. The finished space is comfortable, functional, and fully livable.

We Make Homes Stunning Stronger Smarter

Interior Finishing and Functional Design

A well-designed ADU should feel like a complete home. We handle interior finishing with attention to comfort and practicality.

Our services include kitchen installation, bathroom construction, flooring, lighting, and storage solutions. We use durable materials suitable for daily living. Proper layout planning ensures efficient use of space without overcrowding the unit.

Each ADU is designed to provide comfort, privacy, and long-term performance. 

ADU home exterior with contemporary design in San Jose, featuring a sleek gray finish and large wind.

Energy Efficiency and Modern Utilities

Energy efficiency plays an important role in ADU construction. Proper insulation and modern systems reduce long-term operating costs.

We install energy-efficient windows, doors, lighting systems, and plumbing fixtures. Safe electrical and HVAC systems ensure reliable performance. Our approach focuses on creating comfortable living environments with reduced maintenance needs.

Our Accessory Dwelling Unit Construction Process

We follow a structured approach to ensure smooth project completion.

1. Property Evaluation

We inspect your property and discuss your goals for the ADU.

2. Design & Planning

We develop detailed plans, including layout, materials, and cost estimates.

3. Permit & Construction

We manage required permits and complete construction with professional supervision.

4. Final Inspection

We review the finished unit to ensure it meets quality and safety standards.

ADU Construction Frame in San Jose for Home Expansion.
Modern ADU unit built with wood and black siding in San Jose.

Why Choose Us for Accessory Dwelling Unit Construction?

  • Experienced construction and remodeling professionals
  • Complete project management from start to finish
  • Knowledge of local building requirements
  • High-quality and durable construction materials
  • Transparent pricing and clear timelines
  • Strong structural and safety standards
  • Attention to detail in every stage of the project
  • Long-lasting workmanship
We are committed to delivering Accessory Dwelling Units that provide value, comfort, and reliable performance.

Our Service Areas

Expand Your Property with Professional ADU Construction

Adding an Accessory Dwelling Unit is a smart way to increase living space and property value. Our professional construction services ensure your ADU is built safely, efficiently, and according to modern standards.

Contact D&D Home Remodeling today to schedule your consultation and begin planning your Accessory Dwelling Unit with trusted professionals.

Office@Ddhomeremodeling.com 3031 Tisch Way, 110 Plaza West, San Jose, California 95128 Monday – Sunday: 09:00AM-09:00PM
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Related Articles

People Also Ask

The $40,000 grant in California refers to the California ADU Grant Program, which provides eligible homeowners with up to $40,000 in pre-development costs for building an Accessory Dwelling Unit. This funding can cover expenses like architectural plans, permits, and site prep, but not construction. To qualify, you must be a low- to moderate-income homeowner and meet specific criteria. For homeowners in San Jose, Santa Clara, and Sunnyvale, this grant can significantly offset initial hurdles. For more details on current availability, please refer to our internal article titled Is The California ADU Grant Still Available For Homeowners?. D&D Home Remodeling recommends consulting a local expert to navigate the application process effectively.

The cost to build a 1000 sq ft ADU in California varies significantly by location and design complexity. In the San Jose, Santa Clara, and Sunnyvale area, homeowners typically spend between $200 and $400 per square foot for a turnkey project. This means a 1000 sq ft unit can range from $200,000 to $400,000. Key factors influencing this price include foundation type, utility connections, and interior finishes. Permits and impact fees are additional costs that can add $10,000 to $30,000 or more depending on the city. For a detailed breakdown of these fees in San Jose, please read our internal article titled Cost Of ADU Permits In California: A San Jose Guide. At D&D Home Remodeling, we always recommend budgeting for a 10 to 15 percent contingency to cover unexpected site conditions.

In construction, ADU stands for Accessory Dwelling Unit. It is a secondary, self-contained residential structure located on the same property as a primary single-family home. ADUs are often referred to as granny flats, in-law units, or backyard cottages. They include their own kitchen, bathroom, and sleeping area, making them fully independent living spaces. For homeowners in San Jose, building an ADU is a popular way to accommodate aging parents, adult children, or generate rental income. For a deeper understanding of how to design these spaces for family flexibility, we recommend reviewing our internal article titled San Jose Home Remodeling For Multi-Generational Living: A Guide To Universal Design And Space Planning. This guide covers universal design principles and effective space planning for multi-generational households.

Building an Accessory Dwelling Unit (ADU) involves careful planning to avoid costly errors. A frequent mistake is underestimating the total budget, as foundation work and utility connections often exceed initial estimates. Another common issue is failing to verify local zoning laws and setback requirements before finalizing the design, which can lead to redesigns or permit denials. Homeowners also often overlook the need for separate utility meters or proper fire safety access, which can delay final inspections. For a comprehensive guide on this topic, we recommend reading our internal article titled Avoiding Common Mistakes When Building Your Sunnyvale ADU. Ensuring you have a clear contract with a licensed contractor is essential to avoid scope creep and unexpected expenses.

An ADU, or Accessory Dwelling Unit, is a secondary housing unit on a single-family residential lot. Common types include a converted garage, a basement apartment, or a detached backyard cottage. These units are fully self-contained, featuring their own kitchen, bathroom, and sleeping area. For homeowners in San Jose, building an ADU is a popular way to create rental income or provide space for family members. The city has specific zoning and permitting rules that must be followed. To help with the financial side, you can learn about available funding by reviewing our internal article titled Accessing The California ADU Grant For Your San Jose Project. D&D Home Remodeling can guide you through the design and construction process to ensure your project complies with all local codes.

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