If you’re looking for a trusted ADU contractor in Redwood City, W & W Builders Group offers full-service ADU design and construction tailored to Redwood City zoning regulations, permitting requirements, and inspection standards. From feasibility analysis and architectural planning to city approvals and final construction, we manage every phase of the ADU process to keep your project organized, compliant, and moving efficiently.
Whether you’re planning an income-producing rental unit, a private guest house, or additional living space for family, our experienced team builds ADUs that are thoughtfully designed, professionally constructed, and aligned with long-term property value. With local expertise and a structured design-build approach, we help Redwood City homeowners complete their ADU projects with confidence and clarity.
Learn more about our full ADU design and construction services.
Redwood City homeowners can choose from several types of Accessory Dwelling Units (ADUs) depending on their property layout, lot size, zoning requirements, and long-term goals. Each ADU type offers different advantages in terms of cost, privacy, construction timeline, and flexibility.
A detached ADU is a standalone structure built separately from the main home, most often located in the backyard. This option provides the highest level of privacy and design flexibility, making it ideal for rental income, independent living space, or extended family use. Detached ADUs typically require new foundations, framing, and utility connections, which can increase construction costs but offer maximum separation and long-term value.
An attached ADU is connected directly to the existing residence and is commonly built as a home addition. This option allows homeowners in Redwood City to expand living space while maintaining architectural continuity with the primary home. Attached ADUs can be a strong choice when yard space is limited or when integrating the ADU into the existing structure is preferred.
A conversion ADU transforms an existing garage, basement, or unused interior space into a fully functional living unit. Conversion ADUs are often the fastest and most cost-effective option because they utilize existing structures and utilities. Garage conversions are especially popular in Redwood City due to reduced construction complexity and shorter permitting timelines.
Homeowners planning an ADU often explore additional upgrades such as kitchen remodeling in Redwood City, bathroom remodeling, full home remodeling, or home additions to improve comfort and long-term value.
As an experienced ADU contractor in Redwood City, we follow a structured, step-by-step process designed to keep projects predictable, organized, and fully compliant with local zoning and building codes. From initial feasibility through final approval, our team manages every phase to ensure a smooth, efficient, and stress-free ADU build.
We begin with a detailed consultation and site evaluation to review Redwood City zoning requirements, setbacks, lot size, access points, and existing conditions. During this stage, we also discuss your goals, budget, and intended use for the ADU to confirm feasibility and identify the best approach for your property.
You receive a comprehensive proposal outlining the full scope of work, estimated construction timeline, and budget expectations. This step ensures complete transparency and clear expectations before moving forward with design and permitting.
Our architects and engineers develop custom ADU plans tailored to your property while complying with Redwood City building codes, zoning regulations, and energy requirements. Each design prioritizes efficient layouts, functionality, and long-term usability to maximize both comfort and property value.
We manage the entire permitting process, including plan submissions, revisions, and coordination with the City of Redwood City. Our familiarity with local approval processes helps reduce delays and keeps your ADU project moving forward efficiently.
We guide you through selecting finishes, fixtures, and materials that align with your design preferences, durability needs, and budget. From flooring and cabinetry to appliances and exterior details, we help streamline decisions to keep the project on schedule.
Once permits are approved, construction begins. Our dedicated project managers oversee subcontractors, inspections, scheduling, and quality control to ensure the build meets professional standards and stays on track.
After construction is complete, we conduct a detailed walkthrough with you and coordinate all final inspections. This step ensures every detail meets expectations and complies with Redwood City requirements before final sign-off.
Your ADU is complete, fully approved, and move-in ready. Whether it’s used as a rental unit, guest house, or additional living space, your new ADU is built for comfort, functionality, and long-term value.
Building an ADU in Redwood City requires local expertise, careful planning, and precise execution. The city’s ADU regulations, setbacks, utility requirements, and inspection processes demand experience with local approvals and workflows.
As a local ADU contractor, we offer a streamlined design-build approach that keeps your project moving forward without unnecessary delays or surprises.
Proven experience with Redwood City ADU regulations and approvals
Design-build ADU services under one roof
Full permit and inspection coordination with the City of Redwood City
Clear scopes of work and transparent pricing
Dedicated project management from start to finish
High-quality craftsmanship built for long-term performance
The cost of an ADU project in Redwood City depends on the ADU type, total square footage, design complexity, site conditions, and finish selections. In many cases, Redwood City ADU projects typically range from $150,000 to $450,000+, depending on scope, structural requirements, and utility connections.
Garage conversion ADUs are often more cost-effective because they use an existing structure and may reduce foundation and framing work. Attached and detached ADUs typically cost more due to new foundations, structural framing, roofing, and upgraded utilities. Permit fees, engineering requirements, and material selections can also impact the final budget.
Working with an experienced ADU contractor in Redwood City like W & W Builders Group helps you set a realistic budget, define the scope early, and avoid costly surprises during construction.
The timeline for building an ADU in Redwood City varies based on project complexity, city review timelines, and construction scope. Most ADU projects take between 5 and 8 months from initial consultation to final approval.
This timeline typically includes planning and design, permitting and city approvals, construction, and final inspections. Garage conversion ADUs may be completed faster, while detached ADUs often take longer due to new construction requirements.
Working with an experienced ADU contractor in Redwood City like W & W Builders Group helps streamline approvals and keep the project moving efficiently.
Redwood City homeowners typically choose from three main types of Accessory Dwelling Units (ADUs): detached ADUs, attached ADUs, and conversion ADUs.
A detached ADU is a standalone structure built separately from the main home and is ideal for rental income or independent living. An attached ADU is connected to the existing residence, often built as a home addition. Conversion ADUs involve transforming an existing garage or interior space into a fully functional living unit and are often the fastest and most cost-effective option.
A local ADU contractor in Redwood City can help determine which ADU type best fits your property, zoning requirements, and long-term goals.
Yes. A properly designed and permitted ADU can increase property value by adding legal living space and creating flexibility for rental income, extended family living, or future resale.
In Redwood City’s competitive housing market, homes with ADUs are often more attractive to buyers. The overall value impact depends on design quality, layout, finishes, and how well the ADU integrates with the main home.
W & W Builders Group focuses on building ADUs that meet local codes while maximizing long-term value and usability.
Homeowners in Redwood City have several options for financing an ADU, including home equity loans or HELOCs, cash-out refinancing, construction or renovation loans, and personal savings.
The best financing option depends on available equity, interest rates, project budget, and long-term goals. While W & W Builders Group does not provide financing directly, we help homeowners define realistic project scopes and budgets so they can confidently explore financing with lenders.
The best way to plan for ADU construction in Redwood City is to start with a clear understanding of zoning requirements, setbacks, budget, and intended use for the ADU. Deciding early whether you want a detached ADU, attached ADU, or conversion ADU helps shape the design, timeline, and overall cost.
Partnering with a trusted ADU contractor in Redwood City like W & W Builders Group allows you to evaluate site conditions, navigate design and permitting, and create a realistic construction plan that aligns with city requirements. Early planning and professional guidance help prevent delays and ensure a smooth ADU build.
Many homeowners coordinate ADU construction alongside full home remodeling in Redwood City to improve layout, flow, and long-term functionality.
