garage adu designs | ADU Plans, Floor Plans & House Designs (2024)

FAQs

What is ADU floor plan? ›

As set forth in California Government Code section 65852.2, an Accessory Dwelling Unit (ADU) is a smaller (detached or attached) secondary dwelling unit with complete, independent living facilities (kitchen and bathroom) that is located on the same parcel as a primary dwelling unit (existing or proposed).

Minimum Size: An ADU must have a minimum living area of 150 square feet.

1BR ADU Sizes

In California, the law allows for an ADU of up to 1200 sqft on most residential properties, subject to a 4′ setback on the sides and rear. The size of a one-bedroom ADU can be tailored based on your specific needs and preferences. A compact yet functional one-bedroom ADU typically starts around 400 sqft.

The average cost of building an above-garage ADU ranges from $200,000 to $350,000, considering a size of 350-500 square feet. However, costs can vary based on factors such as contractor rates, materials, and post-construction expenses.

Local agencies can adopt ordinances to set minimum and maximum unit sizes for ADUs so long as they meet these square footage requirements. Bedrooms: California state law does not allow a limit on the number of bedrooms in an ADU.

Garage conversions are often touted as one of the most budget-friendly methods to create an Accessory Dwelling Unit (ADU). These conversions involve repurposing an existing garage into a functional living space, offering several advantages, cost savings, and key tips for a successful transformation.

We know that everyone is tempted to go with a bigger ADU. However, we here recommend building your ADU under 750 square feet. There are various reasons for it: Constructing an ADU under 750 square feet is exempt from impact fees.

Hard costs are the costs of the labor and materials needed to build the physical structure of your ADUs. It includes the foundation, frame, roof, electrical & plumbing systems, insulation, windows, doors, flooring, and finishes. The hard costs can vary depending on the size, design, quality, and complexity of your ADU.

Building up will add ~$50/square foot to your project. In most cases, a garage conversion is the most affordable way to convert space into an ADU. If your budget is modest keep the existing envelope of the garage, meaning don't expand on the current footprint. This will add extra cost.

Do ADUs add property value? ›

While the exact ROI would depend on local rental markets, total construction costs and project financing, the addition of an ADU contributes significantly to the long-term value of your home. On average, an ADU may bring you an ROI of 5-10%. Short-term rental income may also help to offset building costs!

One study from Porch showed that in large cities, a property with an ADU is typically priced 35% higher than a home without an ADU. Constructing an ADU on your property typically increases the resale value of the property, since the house will be appraised with other homes with ADUs.

Prefab ADU companies may say they can save you 10 to 20% compared to a custom ADU of the same size and quality. If you compare bids from individual designers and contractors to bids from prefab companies, the prefab ADUs often have more straightforward pricing.

An accessory dwelling unit (ADU) is a small dwelling on the same grounds as, or attached to, a single-family house. For example, it could be an apartment over the garage, a basem*nt apartment, or a stand-alone house in the backyard. An ADU can be used to house a family member or for additional income through rent.

It costs how much to convert garage to ADU in Los Angeles? $100,000 – $130,000, Depending on your specific situation, is what you can expect for your garage conversion cost, including plans, contractor labor, materials, and city garage conversion permits.

Accessory Dwelling Units (ADUs) and Junior Accessory Dwelling Units (JADUs) are an innovative and effective option for adding much needed housing in California. ADUs have been known by many names: granny flats, in-law units, backyard cottages, secondary units and more.

An accessory dwelling unit (ADU) is a small dwelling on the same grounds as, or attached to, a single-family house. For example, it could be an apartment over the garage, a basem*nt apartment, or a stand-alone house in the backyard.

Flexibility and usability: An ADU offers flexibility as a detached unit that can serve as a guest house, rental unit, or living quarters for family. Room additions are more integrated and might be used to expand a living area or add a new room.