Find a Great ADU Contractor in Los Angeles

How Do You Find the Best ADU Contractors?

Make sure to ask for contractors that do the kind of work you need. A recommendation to a plumbing contractor won’t help you if you need a kitchen remodeler.

Also, if you seek recommendations on Facebook or any other online platform, only trust recommendations from ‘real-life’ friends.  Suggestions from any of your other FB contacts are often biased (their cousin is a contractor, etc).  

Most people considering a renovation are keenly aware of the potential stressors involved when undertaking such a major project. Whether it’s a kitchen remodel, accessory dwelling unit, garage conversion, or even just installing new flooring throughout the house, there are so many things that can go wrong.

Building an ADU in Los Angeles is a major undertaking. You’re essentially building a smaller version of your house. You wouldn’t trust the construction of your home to a handyman or unlicensed contractor, and you should be equally discriminating when building your ADU. There are a ton of ADU builders in Los Angeles, so you have to be careful when choosing the right one for you. You’re going to spend a lot of time and money on this project, so make sure you do your homework before choosing your ADU contractor. 

While some issues are unpredictable and unavoidable, most issues (like delays and added costs) can often be avoided… as long as you take the necessary precautions from the start – certainly starting with selecting the right contractor team for the job!

Here at GreatBuildz, a free service that personally matches homeowners with reliable Los Angeles ADU contractors, we take contractor screening seriously.


We’ve worked on hundreds of accessory dwelling units and other remodeling projects throughout Los Angeles, Orange County, and Ventura County and greater Southern California; I can assure you that the most important decision you’ll make during your project is to hire the right ADU contractor for the job. Working with a bad team can easily turn your life into a renovation nightmare, so it is crucial to find an ADU contractor you can trust.

ADU Contractor

How can I Find a Good ADU Contractor?

As I mentioned at the beginning of this article, the #1 best way to find a good Los Angeles ADU contractor is to ask family, friends, or colleagues if they can recommend someone good.

If you don’t get any quality suggestions from people you personally know and you need to look online, start with sites that do the most intensive contractor pre-screening and offer personalized service and support.

Our thorough screening process (including background checks, license/insurance checks, in-person interviews, reference calls, etc) ensures our clients get connected to only great local ADU contractors. We know it’s difficult and stressful to find a contractor for any type of construction project, so we’re here to simplify the experience for you.

What Should I Look For in a Good Los Angeles ADU Builder?

Regardless of where you find a contractor you’re considering to build your accessory dwelling unit, always make sure to take precautions to ensure they are truly trustworthy and reliable.  Below are 10 tips to get you started.   

ADU Contractor

1. Contact several Los Angeles ADU contractors by phone; the ones who don’t answer the phone or don’t call you back quickly…that’s a bad sign that they may not be very responsive during your project.   

2. Do a contractor license lookup online. In California, you should navigate to  Here, you can confirm the company you’re considering has an active license, check company owner names, see if they have any infractions on their license, and determine how long the company has been licensed. 

3. Get a copy of their insurance certificate and call their insurance broker; ask whether they have had any insurance claims in the recent past.

4. Call at least 3 references and take a look at pictures of their prior work. If you have the chance to visit one of the ADU contractor’s past jobs and see the construction in person, even better!

5. Interview the owner (or at least the supervisor who will be your day-to-day contact during the project). Especially common with larger Los Angeles ADU contractors, the person at your first meeting is often just a salesperson, probably one of several on their staff. 

6. Check their reviews online.  Read any negative reviews and determine how bad their behavior seems to you…and feel free to ask the ADU contractor to explain their bad reviews.  A significant number of bad reviews (especially in the last 2 years) clearly indicate a pattern and you should think twice about hiring this company.

7. Set out your expectations of them. A good way to do this is to present them with a “Contractor Code of Conduct” document. If they don’t agree with some of these expectations, have them explain why.

8. Consider running a background check on them – Your contractor and his team will be in your home, quite likely without you in it. You want to make sure you can trust them, the same as you would with a nanny for your child.

9. Ask the potential Los Angeles ADU contractor important questions you need to know about them and their process to ensure they are a good fit for you.  Some good questions to ask are listed at the end of this article.

How Can I Vet ADU Contractors?

Be aware of the following red-flags:

  • The contractor keeps suggesting upgrades to your project or additions to your scope
  • The contractor’s estimate includes many “TBD” items will have to be determined during construction
  • Any contractor that continually talks about how great they are and how bad the other companies are
  • A contractor that takes longer than a week to meet with you or respond with an estimate
  • A contractor is pushy or doesn’t seem to respect your budget & scope. 
  • If a contractor asks for more money before starting the project 
  • If a contractor is unresponsive or slow to respond to you 


ADU Contractor

Should I Pick the Cheapest Los Angeles ADU Builder?

Many people make a contractor hiring decision based on the cost estimate and their ‘gut feel’ of the contractor after one meeting. This is a start, but it’s grossly insufficient to tell the good guys from the bad guys.  Once you find an ADU contractor and meet with them, they are trying to sell you, so they are on their best behavior. The price they give you for the job is important but tells you nothing about whether they are a quality contractor.

Remember that building an ADU is just like building an entire home, only smaller. Most people would never just hire a handyman or unlicensed contractor to build them a home. And it’s also probably unwise just to hire the cheapest contractor to build your ADU. Although price is always an important factor, you should also be confident you’re hiring the best contractor based on other criteria.

Building an ADU is a significant investment, and it doesn’t come cheap. ADU costs can range greatly depending on size, location, requirements, etc. Regardless of your specific project, you’ll want to make sure you’re paying your ADU contractor a fair price. So, before choosing and hiring, make sure you get 3-5 bids from different ADU contractors. If all the bids are pretty similar in price, that’s a good sign that your project is ‘clear’ to each contractor and their pricing is probably in-line with the market. However, if your bids are all over the place, that’s a sign that something is wrong. Either your project details are unclear or you may have contractors that not realistic on price…either too high or too low. In this case, get more bids to help you narrow the appropriate cost of the job.

Also, contractor estimates may vary significantly in what is and isn’t included, so you have to compare them carefully to ensure every bid is ‘apples to apples’ comparable. Before you meet with contractors, it’s a good idea to create a checklist of every item you want to be included in your project and hand it to every contractor you meet.

Los Angeles homeowners should take as many steps as possible to protect themselves from having a renovation nightmare.  The more of these steps you take, the more confident you’ll feel you found a quality professional to build your accessory dwelling unit. 

What Should I Ask an ADU Contractor near me?

1. When could you start?

2. What do you estimate would be the duration of the project?

3. Will you assume responsibility for obtaining all permits and ensuring compliance with all regulatory requirements?

4. Are you familiar with the personnel in our city planning department?

5. Would I receive guarantees and warranties on labor and materials?

6. Do you prefer to work with clients who already know what they want or do you enjoy providing ideas and advice?

7. Would you assist with the selection of materials such as appliances, paint, flooring, countertops, tile and other materials?  Do you shop with your clients?  Do you purchase on their behalf?

8. Cite any parking restrictions and discuss disposal bin location as needed

9. What work hours would your personnel be on-site? How often will the GC be on-site?

10. Will there be a foreman or project supervisor on-site at all other times?

11. How often would the GC and homeowner meet in person or telephonically, to keep us abreast of project progress and issues as they arise?

12. How will changes in project scope work? Written change orders? Verbal approvals?

13. When can I expect a proposal? Will it include labor and materials? What won’t it include?

When it comes to finding a reputable ADU contractor for your project – GreatBuildz is simplifying the contractor search.


GreatBuildz is a free service in Los Angeles, Orange County, Ventura or San Diego that connects homeowners with reliable, thoroughly screened general contractors and provides project support from start to finish.


Call now (818.317.3567) to chat with our local staff about your next renovation project or visit our website for more information:

Hi, we're Paul and Jon - Co-Founders of GreatBuildz. We believe everyone deserves to find a great contractor, have a stress-free renovation, and enjoy their beautiful new space. There are so many contractors out there and it's often hard to tell the good from the bad... until it's too late. We started our company to help simplify your contractor search and help you have a stress-free renovation experience. We're always available to help, no matter where you are in the process.

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GreatBuildz matches you with reliable, pre-screened general contractors and takes the stress out of renovating – at no cost to you.  

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