Home/Garage Conversion
Licensed CSLB Contractor, Los AngelesGarage Conversion Contractor in Los Angeles
If your garage is sitting underused, a garage conversion turns an existing structure you already own into a fully permitted, income-ready ADU. Renova Built handles your entire Los Angeles garage conversion, from design and permits to final inspection, in-house and on one contract.
The Basics
What Is a Garage Conversion ADU?
An accessory dwelling unit (ADU) is a secondary home on a single-family lot, and a garage conversion ADU is exactly what it sounds like: your existing garage rebuilt into a fully legal, independent living space. To count as an ADU under California law, the converted garage has to meet every standard a new unit would, with its own kitchen, its own bathroom, a separate entrance, proper insulation, and full building and energy code compliance.
That is the difference between a fixed-up garage and a permitted ADU that adds legal, rentable square footage. Whether your garage is attached or detached, one-car or two-car, the finished result is a real, independent home, inspected and signed off by the city. Garage conversions are the most popular and most cost-effective ADU we build in Los Angeles, and this guide walks you through the garage conversion process, the costs, and the regulations.
Why Convert
Why Convert Your Garage Into an ADU
20-30%Typical savings vs new construction, because the existing structure already stands
FasterPermitting moves quicker since the garage footprint is already there
Higher ROILower build cost against the same rental income potential
The reason a garage conversion costs less than a new detached ADU is simple: most of the hard structure already exists. Your garage already has a foundation, walls, and a roof. Reusing that existing garage structure instead of pouring and framing from scratch can save 20-30% of the total build cost, which is why garage conversions are the more affordable path to a legal unit in Los Angeles, and why a garage conversion ADU often adds more in property value than it costs to build.
It also tends to move through the city faster. Because the building footprint already exists, the permitting process is usually quicker than a brand-new structure, which means less waiting before construction starts. Put those together and the math is hard to beat: you spend less to create the same kind of rental unit, so garage conversions often deliver a higher return than any other ADU type, lifting both rental income and property value. Many Los Angeles homeowners use the finished living space for rental income, for aging parents, for an adult child, or as a home office. If you want help with funding, our ADU financing overview walks through the options.
Our Services
Our Garage Conversion Services
We offer three core approaches to converting a garage into an ADU. The right option depends on your existing garage structure, your goals for the space, and the conditions on your property.
Attached Garage Conversions
An attached garage shares a wall with your main house, which often makes utility connections, such as plumbing, electrical systems, and HVAC, shorter and less expensive to run. Attached conversions suit homeowners who want a guest suite, a one bedroom ADU for a family member, or a rental unit with a separate entrance as required by code. Fire separation assemblies and proper egress windows must be installed to meet safety standards, and depending on the home’s existing fire-protection setup, the project may trigger review of fire sprinklers. For many attached garage projects, a basic conversion is the most cost effective path because you are working within the existing structure with minimal added complexity.
Detached Garage Conversions
A detached garage sits apart from your existing primary residence, which makes an ADU garage conversion a practical way to create a private, independent unit for tenants or family members. Detached units provide a clean separation that often commands higher rental rates, and a detached ADU garage conversion lives like a true standalone home. The trade-off is that utility runs to water, sewer, and your electrical panel are usually longer, and the existing garage footprint may need foundation retrofitting or structural upgrades to meet current residential building standards. Even so, a detached garage conversion remains far less expensive per square foot than ground-up new construction, because the shell, the roof, walls, and slab, already exists.
Garage Conversion With Additions
When your existing garage does not provide enough usable square footage, or the ceiling height falls short of the minimum for habitable space, a conversion with an addition solves the problem. That might mean expanding the footprint, raising the roof, or adding additional square footage to fit a full bathroom and kitchen. ADUs can be up to 1,200 square feet in Los Angeles, so there is room to scale up if lot coverage, setbacks, and local size limits allow, while a JADU is capped at 500 square feet. These projects involve more permitting and structural work, but the result is a larger, more functional living area that lifts both property value and rental income potential.
How It Works
The Garage Conversion Process, Step by Step
One team, one contract, from the first site visit to the final inspection.
1
Site Assessment
We visit your property to confirm the garage is a good candidate, measuring square footage, checking ceiling height, inspecting the foundation, and reviewing existing utility connections, setbacks, and drainage.2
Design
Our in-house team creates the floor plan and 3D renderings, placing the kitchen, bathroom, and separate entrance so the unit lives well and meets code.3
Permitting and Plan Check
We prepare the full plan set and Title 24 energy documentation, submit to LADBS or your local jurisdiction, and manage every plan-check correction until the project is cleared to build.4
Selective Demolition
We remove the garage door, interior surfaces, and anything that needs to go, while protecting the existing structure we are keeping.5
Foundation Work
If the existing slab needs upgrading to support a livable space, we handle the foundation retrofitting required by code.6
Framing
We frame the interior walls, the new window and door openings, and any structural changes the design calls for.7
Systems
Electrical systems, plumbing, and HVAC go in, run to code and sized for a full living unit rather than a garage.8
Insulation, Drywall, and Finishes
We add proper insulation, hang and finish drywall, then install flooring, the kitchen, the full bathroom, fixtures, and paint.9
Inspections and Final Inspection
The city inspects the work, the final inspection passes, the certificate of occupancy is issued, and we walk you through your finished, permitted ADU.
Cost Overview
How Much a Garage Conversion Costs
Garage conversions are the lowest-cost path to a legal ADU in California. These are typical Los Angeles ranges, not a fixed quote.
| Project type | Typical LA range |
|---|---|
| Attached garage conversion | $150K to $200K |
| Detached garage conversion | $150K to $200K |
| Permit and plan-check fees | $5K to $15K |
Your final garage conversion cost depends on the condition of the existing garage, the finishes you choose, the scope of structural work and utility connections, and your city’s fees. Soft costs such as design, engineering, and Title 24 documentation are included in our estimate, so there are no hidden fees. For a full breakdown and a look at rental income and payback, see our ADU cost guide.
The Return
What a Garage Conversion Returns
$1,500-$2,500Typical monthly rental income for a converted garage ADU in Los Angeles, depending on neighborhood and finish
Added ValueA well-built ADU can add meaningful resale value, often more than the conversion costs themselves
5-8 YearsTypical payback period through rental income, one of the strongest residential investments in Los Angeles County
Before and After
View All ProjectsGarage Conversion Examples
Before
After1 Bed, 1 Bath ADU
InteriorKitchen and living space
A Quick Distinction
Garage Apartment Conversion: What’s the Difference?
People sometimes use “garage apartment” to mean a unit built above a garage, with the parking kept below and living space on a second level. It is a real option, but it is far less common in Los Angeles than a straight garage conversion, because it involves new second-story structure, stairs, and a bigger budget.
For most homeowners, converting the existing single-level garage is simpler, faster, and much more affordable. If you are weighing a two-story option, we are happy to talk through whether it makes sense for your lot during your free consultation.
Service Areas
Garage Conversions Across LA, OC, and San Bernardino
Based in Sherman Oaks in the San Fernando Valley, we serve homeowners throughout Los Angeles County, Orange County, and San Bernardino County, including Encino, Studio City, Pasadena, Santa Monica, and Beverly Hills.
Free Consultation
Convert Your Garage Into an ADU
Tell us about your garage and we will reach out, usually within one business day. No pressure, no commitment. Call (818) 968-2981 or send your details.
Garage Conversion FAQ