Garage Conversion

Garage ADU Conversion Cost

What a garage-to-ADU conversion really costs before you start.

Feb 20258 min read

Adding extra living space to your home can be a great way to generate income or house an extended family member. But before you start the project, it’s important to know how much it will cost to convert your garage into an ADU.

The cost to convert a garage into an ADU

The cost to convert a garage into an ADU can vary greatly by region, property size, labor availability, and quality of materials. The process usually involves selecting building materials (flooring, walls, electrical wiring, insulation), obtaining permits, hiring contractors to complete the work, and making sure all appropriate safety standards are met.

Most garage conversions require detailed planning and careful budgeting. Here are the major cost factors you’ll need to consider:

Garage conversion sub-floor framing with new plumbing and electrical rough-ins
  • Permit fees. Depending on your local zoning regulations, you may need to pay for a permit that allows conversion into an ADU — anywhere from hundreds to thousands of dollars.
  • Construction costs. Once you have the permit, you’ll hire a contractor to do the actual work of turning your garage into livable space — framing, plumbing, electrical wiring, and HVAC. The cost depends on the complexity of the project and the materials used.
  • Finishes. Depending on how luxurious you want your ADU to be, plan for the cost of flooring, lighting fixtures, cabinetry, and similar details.
  • Utilities. You’ll need new electrical and plumbing lines for the ADU. This can add up quickly and is often one of the larger expenses.
  • Ongoing maintenance. Once the ADU is built, regular upkeep and repairs add up over time and should be factored into your overall budget.
  • Insurance. Check with your insurance provider to make sure you’re covered for any liability claims that may arise from having an ADU on your property.
  • Financing. Depending on the cost of the project, you may need a loan or line of credit. Research the available options and consider your budget before committing to a lender.

You’ll also want someone to check local and state building codes so you meet all the requirements — you may need to submit plans for approval or obtain permits before construction begins. Here at Preferred Home Builders, we can offer guidance and walk you through this part of the process.

ADU garage conversion tax benefits

Depending on where you live, there may be tax benefits available when converting your garage into an ADU — tax deductions, tax credits, and property tax deferrals among them. If you work with us on your project, Preferred Home Builders can provide the information you need to take advantage of these incentives.

Garage conversion projects by Preferred Home Builders

We specialize in garage conversions for ADUs and can help you transform your existing space into a useful addition to your home. Our experienced staff works with local building codes and regulations, so you’re aware of all the requirements for the project. Whether you’re converting the garage into a rental unit, guest house, dining room, or simply more living space, we have the knowledge and experience to help you get started and finish strong.

We can provide detailed plans, cost estimates, and construction timelines. We understand that a garage conversion is an investment in your home, so we take the time to explain all the details involved. From start to finish, we’re with you every step of the way to make sure the project is completed on time, within budget, and to your needs.

Newly stuccoed garage conversion with fresh windows and a glass patio door

Attached or detached garage?

No problem. Whether it’s a detached garage or an attached one, our team can help you create the perfect space for your needs. We have extensive experience converting garages into living spaces and are familiar with all the building codes and regulations this type of project requires.

Ideas for your new garage conversion

When it comes to ADU garage conversion ideas, the possibilities are endless. From a home office or gym to an in-law suite, our team can help you come up with creative solutions that suit your lifestyle and budget. We’ll work closely with you to determine how best to use the extra space so your new area is both functional and beautiful.

Completed garage conversion exterior with a private patio seating area

Room additions

If you’re looking for a bigger conversion, consider adding rooms to the existing area. With a room addition you can create an extra bedroom or bathroom, build a game room, add a living area, or even construct a separate apartment for rental income. Our team is experienced in all types of ADU construction and will make sure your addition is safe and meets the necessary building codes.

Patio cover

Patio covers have become increasingly popular and are a great way to take advantage of the extra space around your conversion. Whether you want an enclosed patio cover or something more open-air, our team can design and build a structure that makes the most of your outdoor space. We use only quality, weather-resistant materials so your patio cover looks great and stands up to whatever the weather brings.

Covered outdoor living area with ceiling fans, lounge seating and a poolside bar

Home office

Home offices have become a necessity in today’s fast-paced world, and they don’t need to lack style or function. Our team will work with you to create the perfect workspace, no matter how big or small — from built-in shelving and cabinets to wall painting and lighting, we can make your home office a place both you and your clients appreciate.

Start your Los Angeles garage conversion

ADU garage conversions are becoming increasingly popular in Los Angeles and the surrounding Southern California area — and why wouldn’t they be? You increase the livable space of your existing house and your property value without impacting the existing structure. The building permits are straightforward to get, and you instantly add square footage to your single-family home or multi-family complex.

It has been estimated that nearly one quarter of all garages in the city could be converted into accessory dwelling units.
Garage-to-ADU conversion in progress with a new roofline and stucco exterior

Preferred Home Builders is well-versed in the local zoning regulations, permits, and other details that pertain to garage conversions in Los Angeles. We can help you determine the most efficient, cost-effective approach for your ADU conversion — whether it’s a full conversion or partial completion of the garage.

We also understand that every customer has unique needs, so we work closely with you to create your garage conversion plans and make sure your project turns out exactly how you envisioned it. We provide creative solutions and design concepts for any remodel, and our team is there from start to finish — from the initial consultation to a fully finished garage conversion that meets all regulations and ordinances in Los Angeles.

Contact us today for your free consultation and to get started with your ADU garage conversion project.

Eli P.

Design Consultant

Eli’s construction experience spans many years and a reputation for creativity on every project. His 3D renderings — where artistry meets technical know-how — cover everything from simple bathroom remodels to the most complex builds, always backed by deep construction knowledge.

More about me

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