Turn your garage or backyard into a complete, permitted home.

Your foundation is one of the most important parts of your ADU. Often overlooked, it supports the entire framing of your property and holds your garage conversion securely in place as the anchor between your walls, ceilings, and the ground below. Our team engineers and pours foundations built to Los Angeles seismic standards so your structure remains level, dry, and structurally sound for decades.

Framing is where your garage conversion begins to take shape and your architectural blueprints come to life. We build precision wood and structural steel framing that supports all of your drywall, doors, windows, and roofing, reinforcing existing garage structures or erecting brand new backyard frames to exact engineered specifications.

A roof serves as the top layer of protection for your ADU, guarding against the weather while improving safety, security, privacy, and insulation. We install durable roofing systems, flashing, gutters, and California Title 24 cool roof materials tailored to match your main house and garage conversion structure.

Quality thermal and acoustic insulation keeps your garage conversion at a comfortable temperature all year round, protecting against winter cold and summer heat while blocking outside street noise. A properly insulated ADU is highly energy efficient, meets California Title 24 requirements, and needs very little additional heating and cooling.

The flooring in your ADU provides essential structural support while setting the look and comfort of the entire living space. We install moisture resistant subfloors, luxury vinyl plank, engineered hardwood, and tile designed to withstand heavy daily use, heat, and sound while creating a warm, welcoming home environment.

Professionally hung and finished drywall provides a tight seal against outside air, dust, pests, and moisture, making it much easier to heat and cool your garage conversion. Our crew installs, tapes, textures, and shapes smooth drywall across flat walls, vaulted ceilings, custom arches, and curved architectural details ready for primer and paint.

Windows and doors are essential features of every ADU and must be planned and installed carefully to maximize natural light, cross ventilation, privacy, and curb appeal. We install energy efficient dual pane windows, sliding glass patio doors, and secure entry doors that expand visibility and connect your indoor living space to the yard.

Interior and exterior painting defines the finished look of your garage conversion while protecting your structure against UV rays, moisture, mold, wind, stains, and pests. We prep, prime, and apply architectural grade coatings inside and out for long lasting surface durability and a clean, modern finish.

We coordinate Los Angeles ADU building code considerations, including size restrictions, height constraints and property line setbacks, as part of the approval strategy for your address.

Before we give a full, detailed price, we do not expect a signed contract.

Our detailed onsite estimate explains the proposed scope, materials, expected cost and schedule assumptions. We stand behind our materials, services, estimates and construction with a full workmanship guarantee, with the project agreement defining coverage, responsibilities and completion arrangements.

The Leading Garage Conversion / ADU Contractor in Los Angeles, specializing in ADU / garage conversion construction.

Leonard is one of the most dependable ADU contractors in Los Angeles. We have access to industry leading, high quality materials as the leading company in Los Angeles. And we have a team of garage conversion professionals eager to start building the ultimate ADU for you! Starting the project might be intimidating. You deserve results you can depend on and service you can trust. You’ve arrived to the right place!

Reasonable Prices

Professional & Licensed

High Quality Materials

Customer Service

We build high quality ADU units. We are the number one ADU / Garage conversion builders in the area! With over 20 years of expertise, we guarantee that all of our Los Angeles customers receive only the greatest quality workmanship. We’re based in Los Angeles, CA and we’ve been serving the Los Angeles and surrounding areas. Thousands of pleased clients have entrusted us with their Garage conversion projects throughout the years, and they couldn’t be happier!

Working with experienced contractors, such as us, is the best way to avoid any problems. You may rest confident that your new ADU / garage conversion will offer you with years of pleasure once we’ve finished building them. And, if there are any issues with your ADU project, which we are confident will not occur, you can rest assured that we will fix the situation, since it is our policy to stand behind every project.

Leonard Garage Conversion efficiency and attention to detail are the pillars of our company’s fundamental principles. Leonard Garage Conversion has consistently stood behind all of our materials, services, estimates, construction, and guarantees. When you choose our experienced team to build your ADU, you can rest assured that they will also assist you in making the right choices. Most of the time, homeowners who don’t obtain this type of advice wind up choosing materials that are cheap and not reliable.

Leonard Garage Conversion builds ADUs to the highest industry standards, hiring only the best workers and using only the best materials and construction techniques. You can rest confident that our contractors genuinely care about you. Homeowners, contractors, builders, designers, and business owners are among the people we work with. Call us right now and we’ll gladly answer any questions you may have or to schedule a free estimate.

The fact that we have a large number of return clients tells everything about our reputation. Whether it’s a simple or high profile project, we always prioritized the needs of our clients. We have a strong trust with our clients, and suppliers. We have some of the top ADU experts in Los Angeles on our team, and provide exceptional customer service.

For years now, Leonard Garage Conversion has completed many ADU projects in Los Angeles and has built a solid reputation in the ADU / Garage conversion industry. We have earned the respect of our numerous customers as a leading company in our industry. We are delighted to be one of the most successful and largest independently owned ADU / Garage conversion company in Los Angeles.

Our success is due to the values and concepts that we follow when we serve all of our clients.

Specific considerations for ADU / Garage Conversion construction can apply in Los Angeles. Perhaps there are size restrictions or height constraints in the building code, or how close to property line you can build your ADU. Trust Leonard Garage Conversion with the project and you will never be disappointed with the results, we do the job right the first time.

Before we give a full, detailed price, we do not expect a signed contract.

So do you want to add an ADU to your house in Los Angeles? Leonard ADU Garage Conversion is qualified and ready to do this job for you. Our ADU contractors will be more than pleased to assist you in expanding your house and adding that ADU unit.

always providing our customers with extremely competitive pricing without sacrificing any aspects of a project’s success or quality. We are able to provide our customers extremely competitive pricing because of our years of expertise and connections with the best suppliers. We are always available to assist our customers in ensuring that their plans reflect the most cost effective designs for their particular project.

Another advantage of working with a professional ADU/ Garage conversion company is that we have a streamlined and proven process so that you can rest assured that our contractors will complete the project as quickly and professionally as possible. We will provide you with some onsite detailed estimates so you can have an idea of how long it will take us to complete the job and how much it will cost you. Your home and ADU is a valuable asset and you want only the best for it!