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Redwood Estates ADU Zoning And Building Standards

Redwood Estates zoning and building regulations determine the size, placement, and design of your ADU, ensuring it fits within the community’s aesthetic and functional guidelines. Compliance with these standards not only ensures the safety and durability of your structure but also helps avoid potential legal and administrative complications.

At DevArt8 Construction, we specialize in navigating the zoning and building standards in Redwood Estates. Our team will work with you to ensure your ADU meets all local requirements, from initial planning to final inspections. We handle the paperwork, coordinate with local authorities, and provide expert advice on design and construction, ensuring your ADU project adheres to all applicable standards.

Redwood Estates ADU Zoning and Building Standards

Property Requirements

The property requirements for an ADU in Redwood Estates vary depending on the zoning and lot size. Ensuring your property meets these prerequisites is the first step in your ADU project. This includes understanding setbacks, maximum lot coverage, and other critical factors that influence the feasibility and design of your ADU.

Building Size

The size of your ADU will depend on your property’s zoning classification and lot size. Understanding these limitations helps in planning an ADU that maximizes space while staying compliant. Specific size limits ensure the ADU remains an accessory structure and does not overshadow the primary residence.

  • Single-Family Zoned Lots:

For single-family zoned lots, ADUs are typically restricted to a certain percentage of the main dwelling’s size. This ensures the ADU remains a secondary structure and complements the main house. Typical size restrictions might limit the ADU to around 800 square feet or a certain percentage of the lot size, whichever is smaller.

  • Duplex Family Zoned Lots:

Duplex family zoned lots have slightly different regulations, allowing for more flexibility in the size and placement of ADUs. These lots can support multiple ADUs, enhancing the property’s value and functionality. You might be allowed to build larger ADUs or have two smaller units, providing more options for accommodating family or generating rental income.

  • Multi-Family Zoned Lots :

Multi-family zoned lots provide the greatest flexibility for ADU development. These lots can accommodate both attached and detached ADUs, providing various options for expanding living space. Multi-family zoning might allow for several ADUs on a single property, offering significant opportunities for property investment and development.

  • Attached ADUs:

These units are connected to the main dwelling, providing a seamless integration into the existing structure. Attached ADUs often share a wall with the main house, making them cost-effective and easier to build.

  • Detached ADUs:

These units stand alone, offering greater privacy and independence from the main dwelling. Detached ADUs can be built in various styles and sizes, making them a versatile option for additional living space.


In Redwood Estates, there are specific owner-occupancy requirements for ADUs. Typically, the property owner must reside in either the main dwelling or the ADU, ensuring a vested interest in maintaining the property. This regulation helps maintain the quality and integrity of residential neighborhoods, as owner-occupied properties are often better maintained and managed.

Number Of Units Allowed

The number of ADUs allowed on a property in Redwood Estates depends on the zoning and lot size. Generally, single-family lots can have one ADU, while multi-family lots can have multiple units. This regulation helps control density and maintain the residential character of neighborhoods.

Redwood Estates Building Height

Building height restrictions ensure that ADUs do not disrupt the overall aesthetic and privacy of the neighborhood. These regulations vary depending on the zoning classification of the property.

  • Single-family: For single-family lots, the maximum height for an ADU is usually limited to ensure it remains a secondary structure. This might mean a one-story ADU with a maximum height of 16 feet.
  • Duplex family: Duplex family lots may have slightly higher height allowances, providing more design flexibility. This could include the option for a two-story ADU, with a maximum height of around 18 feet.
  • Multi-family: Multi-family lots often allow for the tallest ADUs, accommodating multi-story units if desired. These ADUs might reach up to 20 feet, providing ample space for larger living areas.

Redwood Estates Building Size

The building size of an ADU is a critical factor in planning your project.

  • Single-Family Freedom: Single-family lots have specific size limits to ensure the ADU complements the main dwelling. These limits often restrict the ADU to around 800 square feet or a certain percentage of the main house’s size.
  • Duplex house: Duplex lots offer more leeway in ADU size, supporting larger units that provide more living space. You might be able to build an ADU up to 1,000 square feet, depending on the lot size and local regulations.
  • Multi-Family Mix: Multi-family lots allow for the largest ADUs, enabling the creation of spacious and functional additional units. These ADUs can often be up to 1,200 square feet, offering significant additional living space.

Fire Safety Regulations

Fire safety is a paramount concern in ADU construction. Ensuring your ADU meets all fire safety regulations is crucial for the safety of its occupants. This includes proper installation of smoke detectors, fire-resistant building materials, and ensuring clear access for emergency vehicles.


Parking requirements for ADUs vary, but generally, additional parking spaces must be provided to accommodate the new unit. This helps ensure that the addition of an ADU does not negatively impact street parking and neighborhood traffic.

Utility Connections

Proper utility connections are essential for the functionality of your ADU. This includes water, electricity, and sewage systems. Ensuring these connections are properly installed and meet local codes is crucial for the safety and comfort of your ADU.


Setback regulations dictate the distance your ADU must be from property lines, ensuring it does not encroach on neighbors’ spaces. Typical setback requirements might include a minimum distance of 4 feet from side and rear property lines.

Zoning Regulations

Zoning regulations in Redwood Estates are designed to maintain the community’s character while allowing for the development of ADUs. These regulations include specific requirements for different zoning classifications.

Redwood Estates ADU Zoning Regulations

Single Family

Single-family zoning typically allows for one ADU per lot, with specific design and size restrictions. These regulations help maintain the low-density residential character of the neighborhood.

Duplex Family

Duplex family zoning provides more flexibility, allowing for multiple ADUs and larger units. This zoning classification supports higher density residential use while maintaining the residential character of the area.


Multi-family zoning offers the greatest flexibility, supporting multiple ADUs and various design options. This zoning is ideal for property owners looking to maximize the use of their property and generate rental income.

RF Zone Minimum Lot Area In Redwood Estates

In Redwood Estates, the RF Zone minimum lot sizes ensure ample space for your ADU and lifestyle. The minimum lot sizes range from spacious single-family homes (RF-20) to sprawling estate properties (RF-40), providing various options for ADU development.

  • RF-20: This designation allows for smaller ADUs, perfect for single-family homes. Typical minimum lot size might be around 20,000 square feet.
  • RF-30: Mid-sized lots in this designation support larger ADUs, offering more living space. Minimum lot size might be around 30,000 square feet.
  • RF-40: The largest lots, ideal for expansive ADUs that provide ample room for amenities. Minimum lot size might be around 40,000 square feet.

Room Specifications

The specifications for rooms in an ADU ensure that each space is functional and comfortable. Meeting these specifications helps create a livable and enjoyable space.

Redwood Estates ADU Room Specifications

Room TypeSpecifications
Bathroom– Minimum size: 30 sq. ft.
– Ventilation: Required
– Fixtures: Shower, toilet, sink
– Flooring: Waterproof
– Lighting: Adequate
Kitchen– Minimum size: 50 sq. ft.
– Appliances: Stove, fridge, microwave
– Counter space: Ample
– Storage: Cabinets
– Ventilation: Required
Sleeping Areas– Minimum size: 70 sq. ft.
– Windows: Egress required
– Lighting: Natural and artificial
– Closet: Required
– Flooring: Comfortable
Storage– Minimum size: 20 sq. ft.
– Accessibility: Easy
– Shelving: Adequate
– Security: Lockable
– Organization: Structured

Redwood Estates Requirements

Understanding the specific requirements for ADUs in Redwood Estates is essential for compliance and successful project completion. These requirements encompass various aspects of ADU construction and use, ensuring your unit is safe, functional, and aesthetically pleasing.

  • Detached ADU Redwood Estates: Detached ADUs offer independence and privacy. They must comply with size, height, and setback regulations. Detached units provide flexibility in design and use, often featuring their own entrances and amenities.
  • Attached ADU Redwood Estates: Attached ADUs provide seamless integration with the main dwelling, adhering to specific building codes and standards. These units are typically built as additions to the existing structure, sharing walls and utilities.
  • JADU Redwood Estates: Junior ADUs (JADUs) are smaller units within the main dwelling, often converted from existing spaces such as garages. JADUs are a cost-effective way to add living space, requiring fewer modifications and lower construction costs.

Rental Requirements

If you plan to rent your ADU, understanding the rental requirements in Redwood Estates is crucial. These requirements help ensure that tenants are reliable and that the property is well-maintained.

  • Proof of income: Tenants must provide documentation of their income to ensure they can afford the rent. This might include pay stubs, tax returns, or bank statements.
  • Credit score: A good credit score is often required to demonstrate financial responsibility. Landlords typically look for a credit score of 650 or higher.
  • Rental history: A positive rental history shows reliability and good tenancy behavior. This can include references from previous landlords and a record of timely rent payments.
  • Application fee: An application fee covers the cost of processing rental applications. This fee is usually non-refundable and varies by landlord.
  • Security deposit: A security deposit protects the landlord against damages and unpaid rent. The amount is typically equal to one month’s rent.
  • Proof of renter’s insurance: This protects both the tenant and landlord in case of accidents or damage. Renter’s insurance covers personal belongings and liability.
  • Pet policy: Specifies whether pets are allowed and any associated fees. This policy helps manage potential damage and noise issues.
  • Smoking policy: Defines whether smoking is permitted within the ADU. This policy helps maintain the property’s cleanliness and safety.

Development Standards For Redwood Estates ADU

Understanding the development standards is key to ensuring your ADU project complies with local regulations. These standards cover various aspects of ADU design and construction, helping you create a functional and compliant unit.

ADU TypesDevelopment Standards Specifications
Single-family– Max size: 800 sq. ft.
– Height: 16 ft.
– Setbacks: 4 ft.
– Parking: 1 space
– Design: Must match main dwelling
Duplex– Max size: 1,000 sq. ft.
– Height: 18 ft.
– Setbacks: 4 ft.
– Parking: 1 space per unit
– Design: Must complement main structure
Multi-family– Max size: 1,200 sq. ft.
– Height: 20 ft.
– Setbacks: 4 ft.
– Parking: 0.5 space per unit
– Design: Flexible
Junior ADUs– Max size: 500 sq. ft.
– Height: 15 ft.
– Setbacks: 4 ft.
– Parking: None
– Design: Must be within main dwelling

Redwood Estates Property Designations For ADU

Property designations impact where and how you can build your ADU in Redwood Estates. Understanding these designations helps ensure your ADU project complies with local regulations and avoids potential issues.

  • Flood zones: Ensure your ADU is built above flood level to prevent water damage. Building in flood zones may require additional measures such as raised foundations.
  • Geohazard zones: Assess the geological stability of your property to avoid building in hazardous areas. This might involve soil testing and reinforcement measures.
  • Easements: Check for any easements that may restrict where you can build on your property. Easements might limit construction near utility lines or shared access points.

ADU Permit Requirements And Fees

Securing the necessary permits is a critical step in the ADU construction process. These permits ensure that your ADU complies with local building codes and safety regulations.

Redwood Estates ADU Permit Requirements and Fees

  • Building Permit: Required for any new construction or significant modifications. This permit covers the overall structure and ensures it meets building codes.
  • Electrical Permit: Necessary for any electrical work, ensuring safety and code compliance. This includes wiring, outlets, and fixtures.
  • Plumbing Permit: Required for any plumbing installations or modifications. This covers pipes, fixtures, and sewage systems.
  • Other Permits: Additional permits may be needed for specific aspects of your project, such as HVAC systems. These permits ensure all aspects of your ADU are safe and up to code.

Design Your Dream ADU Today!

Creating your dream ADU in Redwood Estates is a rewarding process with the right guidance. DevArt8 Construction is here to assist you every step of the way, from initial design to final construction. Our team of experts will ensure your ADU meets all local regulations and your personal preferences, resulting in a beautiful and functional addition to your property. Whether you’re looking to create a rental unit, a guest house, or additional living space for family members, we have the expertise and experience to bring your vision to life. Contact us today to start designing your dream ADU!


Building an ADU in Redwood Estates offers several benefits, including additional living space for family members, potential rental income, and increased property value. ADUs also provide flexible living arrangements and can be customized to meet specific needs.

The timeline for completing an ADU project varies depending on the complexity of the design, permitting process, and construction. On average, it can take between 6 to 12 months from initial planning to final inspection.

Yes, you can customize the design of your ADU to match your preferences and needs. DevArt8 Construction offers personalized design services to create a unique and functional ADU that complements your existing property.