Pomona ADU Permits & Construction Cost

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As California’s housing crisis continues, Accessory Dwelling Units (ADUs) have become an attractive solution for increasing housing options. In Pomona, ADUs provide homeowners with the flexibility to build on their property while contributing to the city’s housing needs. At GatherADU, we offer architectural design services and collaborate with licensed contractors to provide full construction services for ADUs. In this guide, we will cover the permit process, construction costs, and important considerations for building an ADU in Pomona.

1. Understanding ADUs in Pomona

An Accessory Dwelling Unit (ADU) is a smaller, self-contained residential unit on the same lot as an existing or proposed primary dwelling. ADUs can be attached, detached, or located within an existing structure such as a garage. They offer complete independent living facilities, including a kitchen, bathroom, and sleeping area. Pomona’s zoning regulations now allow for the development of both ADUs and Junior Accessory Dwelling Units (JADUs), which are smaller units (up to 500 square feet) contained within the main house.

ADUs help meet the city’s housing goals by providing affordable rental units, creating multi-generational living spaces, and increasing property values for homeowners. Whether you're planning a backyard ADU, garage conversion, or an attached unit, Pomona’s zoning codes make it easier to add these units to your property.

Securing a permit is one of the most important steps in building an ADU. In Pomona, the process is relatively straightforward, provided the ADU conforms to local zoning requirements. The City of Pomona adheres to state laws, specifically Government Code Section 65852.2 and Section 65852.22, which outline the requirements for ADUs and JADUs.

Key Permit Requirements:

Zoning Compliance: ADUs are permitted in residential and mixed-use zones. This flexibility allows homeowners in most areas to add ADUs.
Setbacks and Height: The ADU must have side and rear setbacks of at least 4 feet, and detached ADUs can be up to 16 feet in height. If the ADU is near a major transit stop, the height limit may extend to 18 feet(Code Sec 830A ADU Stand…).
Parking: Pomona does not require parking for ADUs, which simplifies the permitting process. However, if parking is provided, it must meet certain size and location standards.
Fire Sprinklers: Fire sprinklers are not required in an ADU unless the primary residence has them.
Owner-Occupancy: For JADUs, the property owner must occupy the main house or the JADU

Permit Timeline: The City of Pomona is required to approve or deny an ADU application within 60 days of submission. This fast-tracked approval process ensures homeowners can start building quickly

3. Construction Costs of ADUs in Pomona

The cost of building an ADU in Pomona depends on several factors, including size, design, materials, and site conditions. Generally, ADU construction can range from $150 to $300 per square foot, depending on the complexity of the project and the quality of materials used.

Average Cost Breakdown:

Design and Permits: $5,000 to $15,000. This includes architectural design, permit fees, and any necessary inspections.
Site Preparation: $10,000 to $30,000. Site work includes grading, utility connections, and foundation work.
Construction: $150,000 to $250,000 for a detached 500- to 800-square-foot ADU.
Additional Costs: Appliances, landscaping, and furnishings may add another $5,000 to $20,000 to the project.

Homeowners may also need to consider impact fees for ADUs larger than 750 square feet. However, for smaller units, Pomona waives these fees (Code Sec 830A ADU Stand…).

4. Financing Options

Financing an ADU can be done through several avenues. Homeowners can explore home equity lines of credit (HELOCs), cash-out refinancing, or specialized ADU loans. California also offers programs that provide financial incentives for building ADUs, particularly for affordable housing or energy-efficient units. At GatherADU, we can help you explore financing options tailored to your needs.

5. Why Work with GatherADU?

At GatherADU, we specialize in designing and managing ADU projects from start to finish. Our team of architects and engineers will work with you to develop a design that complements your existing home while maximizing the use of your property. Additionally, we collaborate with licensed contractors who handle the construction process, ensuring your ADU is built to the highest standards.

We also manage the permit process for you, streamlining the paperwork and ensuring your project complies with local regulations. With our experience and expertise, you can have peace of mind knowing that your ADU project is in capable hands.

Factual Summaries for ADUs and JADUs

Accessory Dwelling Units (ADUs):
An Accessory Dwelling Unit (ADU) is a secondary, self-contained residential unit on the same property as an existing primary dwelling. It includes all essential living components, such as a kitchen, bathroom, and bedroom. ADUs can be attached to the primary home, detached, or converted from an existing structure like a garage. In Pomona, ADUs are governed by state and local regulations, including size limits (850-1,200 square feet depending on lot size), setback requirements, and height restrictions(Code Sec 830A ADU Stand…). They serve as an effective way to increase housing availability, offer rental income, and provide space for family members.

Junior Accessory Dwelling Units (JADUs):
A Junior Accessory Dwelling Unit (JADU) is a smaller living unit (up to 500 square feet) that is entirely contained within the main home. Unlike a standard ADU, JADUs may share bathroom facilities with the primary residence, though they must have a separate kitchen. In Pomona, JADUs are subject to owner-occupancy requirements, meaning the homeowner must live in either the main house or the JADU. These units offer a more affordable option for creating additional living space, particularly for single-family homes.

Conclusion

Building an ADU in Pomona is a smart investment that not only increases property value but also contributes to the city’s affordable housing stock. At GatherADU, we handle every aspect of ADU development, from design and permitting to construction. With our expertise, your ADU project will comply with all local regulations while being completed on time and within budget. Contact us today to get started on your Pomona ADU project!