How Much Does it Cost to Build an ADU in Los Angeles
- 30 Sep, 2025
- Nagar Builders Team
- ADU
Your research about building an ADU has probably led you to wonder, “How much does it cost to build an ADU in Los Angeles, California?” The short answer is anywhere from $100,000 — $250,000. That’s a pretty big range, so let’s break down the typical costs and what can impact your ADU budget the most.
ADU Construction Costs breakdown
Permits: $5,000 – $15,000+
ADU costs: Like all new structures, your ADU will require a series of permits. You won’t need as many permits as you do for a full single-family home, but you will need the main ones for structural, mechanical, plumbing, and electrical systems.
Also Read: ADU Builders in Los Angeles: Why Choose a Local Expert
It’s important to remember to build in some extra room into your budget to account for contingencies. If unexpected things pop up during construction, you may need to pull additional permits in order to complete the work and still remain in compliance with ADU construction rules and regulations.
ADU Pricing includes: Site Preparation and Foundation: $20,000 – $45,000+
If your lot has an existing structure or vegetation that needs clearing, this needs to happen before your ADU can be built. Once all debris has been cleared away, the ground can be leveled and prepared for development. Keep in mind that site preparation costs can vary based on the slope and complexity of your lot.
Slab-on-grade is a common type of foundation in Southern California because it works well in warmer climates where frost isn’t a concern. For an additional cost, you could also do a basement foundation to give your ADU extra living or storage space.
ADU Framing and Structure Cost: $25,000 – $60,000+
No matter the size or shape of your ADU, it’ll include wall studs, joists, roofs, and subfloor systems. In addition to the materials, this is where your ADU builder’s labor really comes into play. The framing and structure of your ADU have to be not only safe and sound, but also up to your personal preferences and standards.
A larger ADU or a two-story ADU can increase costs, although you do get more bang for your buck. In many cases, investing a bit more upfront for added height or square footage can translate into greater long-term functionality and property value.
Most Asked: Space-Maxxing: Tips for Getting the Most Out of Your Los Angeles ADU
ADU Interior Systems Costs: $30,000 – $50,000+
The interior systems are the hidden heroes of your ADU. Plumbing, electrical, and heating and cooling units all fall into this category, and it’s imperative that you invest wisely in these features of your ADU.
Plumbing costs are largely dependent on how far away your sewer line is from your ADU. Meanwhile, your electric’s price tag is heavily influenced by the need for trenching or an upgrade to your main home’s panel to handle your ADU’s power needs. Ductless mini-splits are common in ADUs because they provide both heating and cooling and are powered by electricity instead of gas. A reputable ADU builder in Los Angeles can help you choose the interior systems that are right for your new structure.
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Now that you know how much an ADU costs, your next question is probably, “Where can I find an ADU builder near me in Los Angeles?” The answer is Nagar Builders, a long-time leader in ADU construction for local homeowners. We have the right experience and expertise to build your ADU with a cost-conscious and budget-friendly approach. Call us today to start building your dream ADU.
Contact us- ADU builder near me
Client Testimonials
Thank you Nagar! The entire process was smooth and easy. I called them and they were quick to provide an estimate. Once they explained pricing to me and I agreed, they were ready to work ASAP! I hired them to add an office space to my home. My office went fully remote due to COVID so I wanted to have a full office space where I could concentrate. It was amazing to see the entire construction process, from building the walls, to adding a half bathroom. The finished product is truly impeccable.
Elsa P.
Avi and his team from Nagar builders remodeled our bathroom and kitchen and they did a phenomenal job!!! His team is very skilled, knowledgeable, and clean. Avi was also very professional and he made so many suggestions to us as we weren’t even sure what style and colors we wanted, he pretty much helped us design everything. I wouldn’t hire anyone other than Avi to do any work at my house, I’m very satisfied with his work and professionalism and I highly recommend this company!! Thank you again Avi!
Jessica S.
I’m happy we went with Nagar Builders! They did great work with our project right on schedule and were very courteous. I can’t recommend them more!
B P.
Absolutely happy that I decided to call Nagger builders! They helped me remodel and outdated commercial space. And completely transformed it. They came, gave me a reasonable price quote, we discussed my budget and were able to help me with my project. Micheal is a great communicator, very easy to work with, and I love that he took his time to explain how everything was going to work. they were time efficient, which I appreciated. I extremely recommend their service. They care about their work and they care about their customers satisfaction.
Maria B.
I remodeled my kitchen with new cupboards countertop and appliances! I also put laminate flooring in a family room area and painted throughout! they worked with my budget and I had a wonderful and result! Great communication with The owner Avi! The crew was very professional and thorough! Great job overall! Also the job was completed in less than five weeks! they were always on time at 8 AM! very good experience compared to others I’ve had in the past with other contractors!
Alexandria A.
Truly exceptional remodeling project! From the first meeting to the final touches, the team demonstrated professionalism and expertise. All aspects were handled with precision, ensuring clear communication and timely completion. We are thrilled with the results and would highly recommend Avi’s work to anyone!
Tamar N.
Avi was a pleasure to work with! He fixed a brick wall, laid a concrete driveway, fixed a roof, remediated mold, replaced drywall, installed gutters, he does it all! His work is impeccable and his prices are competitive. It’s a pleasure to work with him!
Sean H.
I hired Nagar Builders to remodel my kitchen. The house I currently live in (in West Hollywood) was passed down to me from my mother. … We added a waterfall counter, tile backsplash, new appliances, and cabinets in a nice warm and inviting blue color. It also felt like they worked fast than estimated so I was able to use my new kitchen earlier than expected! If it weren’t for the pandemic, I would be hosting all the time!
Vanessa R.
We hired Avi from Nagar Builders to help us solve a multitude of issues with our backyard including landscaping with artificial turf, replace our old rotting deck and install vinyl gates, remediate failing stucco wall and foundation, and more. … we are very happy with the look of our backyard now – definitely will bring back Avi for future work!