Attached ADU in Anaheim, California: A Complete Guide to Building and Benefits

Discover Why You Need An Attached ADU

Are you considering expanding your home or adding rental income in Anaheim? An attached ADU (Accessory Dwelling Unit) might be the perfect solution. Whether you need more space for family, a guest house, or a rental unit, this guide will cover everything you need to know about building an attached ADU in Anaheim—costs, zoning regulations, and how it can boost your property’s value

custom adu homes in garden grove

Attached ADU in Anaheim

Our attached adu services in Anaheim are tailored to meet the unique needs of local homeowners. We design and build with functionality, efficiency, and compliance in mind. With property values rising in Anaheim, adding a attached adu can significantly boost your equity while providing flexible living or rental options.

Why homeowners choose us for attached adus in Anaheim:
– Local expertise with Anaheim zoning laws
– End-to-end project management (design, permits, construction)
– Energy-efficient and modern building practices
– Transparent budgets and timelines

Learn about ADU costs and permits in Orange County here 

Request your free Attached ADU consultation in Anaheim now!

 

 

 

 

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What is an Attached ADU?

An attached ADU is a self-contained living unit located on the same property as your primary home, sharing a wall but having its own entrance

 

An Accessory Dwelling Unit (ADU) offers a wide range of practical uses, making it a flexible and versatile option for many homeowners. Here are some examples:

  1. Multigenerational Living: ADUs provide an ideal solution for families who wish to live close together while maintaining independence. They can be used as a separate living space for aging parents, adult children, or relatives. This allows families to share resources and be close to one another, while still having private spaces for everyone.

  2. Working from Home: With the rise of remote work, an ADU can serve as the perfect home office. Its separation from the main house can help create a quiet and productive environment, free from distractions. Whether for a freelance career, running a small business, or telecommuting, an ADU can offer the privacy and focus needed to be efficient.

  3. Rental Income: Many homeowners use ADUs as a source of rental income. The space can be rented out long-term or as a vacation rental. This helps offset mortgage costs or provides a steady income stream, especially in high-demand areas. The flexibility of renting out an ADU allows homeowners to choose the terms that best suit their needs.

  4. Guest House: ADUs are great for hosting friends or family, providing them with a private space to stay when they visit. Whether for a weekend or an extended visit, having an ADU as a guest house ensures guests feel comfortable and independent during their stay.

  5. Home Gym or Studio: For those passionate about fitness or artistic endeavors, an ADU can be transformed into a home gym, yoga studio, or art studio. It offers the space needed for physical activities or creative work without taking up room in the main house.

  6. Entertainment or Hobby Space: ADUs can also serve as a space for hobbies or entertainment. Whether for a music studio, crafting, or a home theater, the versatility of an ADU allows homeowners to indulge in their passions without interrupting the daily flow of the household.

The ability to adapt an ADU to suit various needs—whether for family, work, or personal use—makes it a valuable investment in today’s changing living and working environments.

Reimagine Your Garage. Reclaim Your Investment.

Our Services

Your garage is more than a storage room. It’s valuable square footage that could be working for you

At L Square Construction, we specialize in converting garages into high-end ADUs designed for comfort, functionality, and real return on investment.

Custom ADU Homes

ADUs are the future of home living, offering rental income, extra space or a private office

ADU Design Build

Expand your living space, boost property value, and earn extra income with an ADU from L Square Construction

Garage Conversion ADU

L Square Construction specializes in high-quality garage conversion ADUs that add living space, rental potential, or a private office

Backyard Cottage Construction

Looking for a cozy cabin or cottage in Los Angeles?

Granny Flat

We build high-quality granny flats adapted to their needs.

In-law Suite

We design stylish, private spaces to keep loved ones close.

Why Build a Attached ADU in Anaheim?

Building a attached adu in Anaheim unlocks new possibilities for your property: rental income, private family living space, and long-term value growth. Homeowners in Anaheim choose this solution for flexibility, independence, and ROI.

Our Process

  1. Free Consultation
    2. Custom Design
    3. Permits & Approvals
    4. Construction
    5. Final Walkthrough

Costs & Permits

Attached ADU projects in Anaheim typically range from $200K–$350K depending on size, finishes, and site conditions. Permits are always required, and L Square Construction manages the entire process to save you time.

Why Choose L Square Construction in Anaheim?

We have built over 200 ADUs across Orange County. Our expertise in local zoning, transparent pricing, and on-time delivery makes us the trusted choice for homeowners.

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Real Estate Market in Anaheim: Current Trends

📈 Home Prices

  • Median Sale Price: In June 2025, the median sale price of a home in Anaheim was $915,000, representing a 4% increase from the previous year. (rocket.com)

  • Regional Comparison: Anaheim is among the most expensive real estate markets in the U.S., with a median sale price of $1.45 million, surpassing cities like San Francisco. (nypost.com)

Real Estate Anaheim CALIFORNIA
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The Profound Importance of Supply and Demand of ADUs in Anaheim

🏘️ Supply and Demand

  • Seller’s Market: Anaheim is currently a seller’s market, meaning demand is outpacing supply, driving prices upward. (rocket.com)

  • Rental Vacancy Rates: The rental vacancy rate is low, around 4.5%, indicating high demand and providing an opportunity for property owners to generate additional income through rentals. (malakaisparks.com)

Setting the Stage: Understanding the Los Angeles ADU Landscape

🏗️ Local Initiatives and Support for ADUs

🏛️ 2021-2029 Housing Element

  • Clear Goals: Anaheim’s Housing Element outlines specific goals for housing development, including the promotion of ADUs as a solution to increase housing availability. (anaheim.net)

💰 Local Housing Trust Fund

  • Financial Incentives: Anaheim has established a local housing trust fund to finance affordable housing projects, which could include supporting the construction of ADUs. (anaheim.net)

anaheim attached adu

💡 Benefits of ADUs in Anaheim

🏠 Multigenerational Living

  • Family Solution: ADUs provide an independent living space for family members, such as elderly parents or adult children, promoting coexistence without sacrificing privacy.

💼 Home Office

  • Workspace: With the rise of remote work, an ADU can serve as a private office, enhancing productivity and separating work from home life.

💵 Rental Income

  • Profitability: Given the high demand for rentals in Anaheim, an ADU can generate significant additional income, helping to cover mortgage payments or operational expenses.


🔮 Long-Term Outlook

  • Appreciation in Value: With the continued rise in home prices in Anaheim, properties with ADUs are likely to appreciate at a faster rate, offering an attractive return on investment.

  • Institutional Support: Local policies and funds dedicated to affordable housing reinforce the city’s commitment to developing sustainable housing solutions, including ADUs.

Zone Coding and Legislation

Interior finishing for garage conversion ADU

 

At L Square Construction, we believe garage conversions are about more than just structure — the interior finishing is key to creating a warm, functional home. We handle everything from insulation and drywall to lighting, plumbing, and kitchen installations, ensuring your converted garage feels like a true home, not an afterthought.

Attached ADU in Anaheim
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📘 Official Resources

  1. ADUheim – Anaheim’s Official ADU Portal
    The ADUheim website offers comprehensive information on the ADU review process, pre-approved plans, and the expedited ADU Express program.

  2. Anaheim Municipal Code – Section 18.38.015
    This section outlines the development standards for ADUs and Junior ADUs (JADUs) in Anaheim.

  3. Accessory Dwelling Unit Submittal Requirements Checklist
    A detailed checklist to guide applicants through the necessary steps for ADU development in Anaheim.


🏗️ Simplified ADU Development Flowchart

1. Verify Property Eligibility

2. Choose a Pre-Approved ADU Plan

  • Select from the ADU Pre-Approved Plan Catalogue. Note: Only detached ADUs are eligible for the ADU Express program. 

3. Schedule a Meter Spot Inspection

  • Contact Anaheim Public Utilities at (714) 765-6847 to arrange a free “meter spot” inspection, which helps plan for the additional electrical needs of your new ADU.

4. Submit Application to City Staff

5. Meet with City Staff

  • Attend a scheduled meeting at City Hall to create your site plan, review construction requirements, and address any questions. 

6. Obtain Building Permit

  • After meeting with city staff and completing necessary steps, the Building Division will issue your building permit. 7. Begin Construction and Schedule Inspections

  • Utilize Anaheim’s automated system to schedule required inspections throughout the construction process. 

Download our ebook to know more about ADU

Contact us, a member of our team will reach out to you ASAP and send a quote!

The Building Process: How to Build an Attached ADU in Anaheim

“California in 2024: How Building Two ADUs Can Double Your Property Value and Create Passive Income”

Are you a homeowner in California looking for ways to increase the value of your property and create additional sources of income? Well, here’s some exciting news for you – in 2024, you could be allowed to build not just one, but two ADUs on your property. This could be a game changer for you, whether you’re looking to add space for your family, generate extra income, or simply increase the value of your home.

California is facing a severe housing crisis, and in an effort to tackle it, the state is making it easier for homeowners like you to build two ADUs (Accessory Dwelling Units). This means you could have both a detached unit and an attached unit on your property, or even two detached units. Just imagine having all that extra space right on your own property!

But why is this such a huge opportunity? Let’s break it down. First off, there’s rental income. If you were to rent out one ADU for $2,000 a month, that’s already a pretty good deal. But now, imagine being able to rent out two ADUs – that’s an extra $4,000 a month! Over the course of a year, that amounts to an additional $48,000 in passive income. Just think about what you could do with that – pay down your mortgage, reinvest in your property, or even save for retirement.

And this isn’t just theoretical – in California, where housing demand is high, ADUs are in high demand as well. But it’s not all about the money – building two ADUs also gives you incredible flexibility. You could use one as a space for family members (such as aging parents or adult children), turn it into a guest house or home office, or even a private gym. The possibilities are endless, and with two ADUs, you can really get creative.

But here’s the real kicker – having two ADUs can significantly increase your property value. Future buyers will see the potential in having not just one, but two income-generating units on the property. This makes your home much more attractive in the real estate market, and homes with ADUs often sell for a lot more. With two ADUs, you’re doubling that potential.

So, how do you get started on this exciting opportunity? The first thing to keep in mind is that not every property qualifies for building two ADUs. It’s essential to check with your local city or county to see if your property is eligible. Generally, most single-family residential zones are eligible, but zoning laws can vary. Don’t worry – we can help you navigate the process and make sure you’re on the right track.

Next, you’ll need to get the right permits to move forward. This means working with the planning department to ensure your project meets all legal requirements. It’s not complicated, but it does take some time – so be prepared for that. You’ll also need to make sure your ADUs fit the zoning requirements, such as setback rules, height limits, and lot coverage percentages. Again, we can assist you in figuring all of this out so that the process goes smoothly.

One crucial consideration is size limits – typically, detached ADUs can be up to 1,200 square feet, while attached ADUs are limited to 50% of your main house’s size. So, if your main home is 2,000 square feet, your attached ADU can be up to 1,000 square feet. This gives you flexibility in designing a space that works for you, whether it’s a rental unit or a personal space for your family.

Don’t forget about parking requirements – some areas may require at least one parking spot per ADU. However, if your property is near public transit, you may not need extra parking. It’s essential to check with local rules to be sure.

Now, you may be wondering, how long does this all take? On average, the process can take 6 to 12 months, from start to finish. This timeline includes getting permits, designing the ADUs, and actually building them. While that may seem like a long time, think about the long-term benefits – rental income, increased property value, and flexible space that meets your needs.

Of course, one major concern for many homeowners is the cost. On average, building an ADU can cost between $150,000 to $300,000, depending on the size, design, and materials you choose. It’s certainly an investment, but there are financing options available. California offers programs like the Cal HFA Adu Grant, which provides grants and low-interest loans to help cover some of the costs.

So why should you act now? Well, 2024 is the perfect time to take advantage of these changes. The laws are more favorable than ever before, and with housing demand continuing to rise, there’s never been a better opportunity to add value to your property while creating new income streams. Whether you plan to stay in your home for years or sell it in the near future, adding two ADUs will put you in a much stronger position.

In conclusion, 2024 could be the year of opportunity for California homeowners. With the option to build two ADUs on their properties, they have the potential to double their property value and create passive income. So don’t wait – start exploring your options now and see how building two ADUs can benefit you in the long run.

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ADU Construction Company

💭 Imagine What You Could Gain

Boost your property’s value by up to 30%
Generate passive income with a luxury rental
✅ Create a private, comfortable living space for loved ones
✅ Enjoy the benefits of permitted, code-compliant construction
✅ Watch your garage become a space your family actually uses and loves

Our clients see more than just a remodel — they see a lifestyle upgrade.

Renovation Permits

“Why Skipping Permits for Your Home Renovation Is a Risk You Can’t Afford to Take”

Home renovation projects are exciting, and it’s easy to get caught up in the design and planning process. But before you start swinging hammers and tearing down walls, make sure you have all the necessary permits for your project. While it may not be the most thrilling part of a renovation, permits are crucial to ensuring that your project is legal, safe, and up to code. In this article, we’ll break down the types of permits you may need for common home renovations, why they matter, and how to obtain them.

What are permits and why do they matter?

Think of permits as a way to protect your investment and your home. They ensure that any work being done meets local building codes and safety standards, so you don’t end up with a house full of electrical hazards or plumbing nightmares. Skipping permits can also lead to major headaches down the road.

Imagine being hit with fines or worse, being forced to redo the work because it wasn’t up to code. And if you plan to sell your home later, unpermitted work can delay the sale or even lower your property’s value. It’s always better to play it safe and check with your local building department before starting your project.

Types of permits you may need for your home renovation

1. Building permit: This is the most common type of permit needed for any significant structural changes, such as adding a room, remodeling a kitchen, or building an accessory dwelling unit (ADU). Basically, if you’re altering the layout or structure of your home, you will need a building permit.

2. Electrical permit: Anytime you’re dealing with wiring – whether it’s installing new lights, upgrading your breaker box, or adding outlets – you will need an electrical permit. This ensures that the work is done safely and up to code.

3. Plumbing permit: If you’re making changes to your plumbing system, such as remodeling a bathroom or adding a new one, you will need a plumbing permit. This ensures that everything is installed correctly to prevent leaks, water damage, or contamination issues.

4. HVAC permit: If you’re upgrading or installing new heating, ventilation, or air conditioning systems, you will need an HVAC permit. This ensures that your system works efficiently and keeps your home comfortable year-round.

Do I need a permit for everything?

The good news is that not every home renovation project requires a permit. For smaller cosmetic updates like painting, replacing flooring, or even changing out cabinets, you typically won’t need one. These types of projects don’t typically affect the structure or systems of your home.

How to obtain permits for your renovation project

The process of obtaining permits may vary depending on where you live, but it generally involves submitting your plans to your local building department. These plans should cover any structural changes, utility work, and the materials you plan to use. Once they review everything, they will issue the necessary permits. For simpler projects like an electrical upgrade, many cities allow you to apply online, saving you time.

Remember that once you have the permit, you will also need to schedule inspections throughout the project to ensure everything is done right. Without these inspections, the permit isn’t complete, and your work won’t be certified as safe and legal.

The risks of skipping permits

Some homeowners try to save time and money by avoiding the permit process altogether. However, this is a risky move that can result in severe consequences. If your project is found to be unpermitted, you could face hefty fines and even be forced to tear down the work and start over.

Unpermitted work can also cause issues when it comes time to sell your home. It can delay the sale or lower your property’s value. And in some cases, if something goes wrong, your home insurance may not cover the damage.

Don’t risk it – get the proper permits for your renovation project

It may seem like a hassle to obtain permits for your home renovation project, but it’s an essential step in ensuring your home’s safety and value. Before you start your next project, take the time to check in with your local building department to see what permits you will need. If you’re working with a contractor, they can help guide you through the process and ensure everything is up to code.

In conclusion, while permits may not be the most exciting aspect of a home renovation, they are crucial for protecting your investment and ensuring the safety and value of your home. So don’t take the risk – get the proper permits before embarking on your next renovation project.

Common Mistakes to Avoid When Building an Attached ADU (Common legal or Design Mistakes)

Take a look at these construction mistakes to avoid

What's an ADU

An ADU is a secondary and architecturally diminutive unit on a property that already has a primary residential unit. A thoughtfully designed accessory dwelling unit (ADU) provides extra living space, rental income, or a private retreat. As expert ADU builders in Los Angeles, we craft functional, high-value solutions tailored to your needs.

Our Process

Simple & Stress-Free

We believe that construction should be easy. That’s why we guide you through every step, from concept to completion.

01

Consultation
Understanding Your Vision

We create a custom ADU design that fits your needs and budget, ensuring a smooth process as a trusted Los Angeles ADU contractor.

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02

Design
Custom ADU Plan

Our team designs functional and stylish ADUs, from garage conversions to custom additions, ensuring quality and innovation in Los Angeles.

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Permits – We Handle the Paperwork

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Construction – Building Your ADU

Our expert ADU contractors in Orange County, CA, build your ADU with precision, staying on schedule and within budget.

adu living room

05

Move In Your ADU
is Ready

Your new accessory dwelling unit is fully move-in ready, adding comfort, value, and extra living space to your property.

kitchen

Want the Details?

Learn more about our seamless design and construction process.

Build a Sustainable Future in Your Backyard.

Transform your backyard into an energy-efficient ADU in Los Angeles with smart designs and solar solutions. Our custom ADUs reduce grid dependence while adding functional space and value to your property. Eco-friendly, efficient, and built for the future.

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Cutting-Edge Energy Solutions

Innovative designs that reduce your carbon footprint.

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Designed for Efficiency

Over 2x more energy-efficient than traditional homes.

Turn Your Backyard into a Profitable ADU!

Expert ADU design and construction services customized to fit your space and lifestyle.

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Garage Conversion

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Home Conversion

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Garage Addition

Detached ADU

New Detached ADU

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Home Addition

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Junior ADU (JADU)

Meet our CEO

Hello, I am Kiko - CEO of L Square...

Kiko brings a unique perspective as a Chinese-American entrepreneur, which enriches the company’s cultural and professional diversity. This background allows her to understand and address the needs of a wide range of clients, offering customized solutions that reflect a deep understanding of different cultural and social perspectives.

The Work We Have Done

Garage to ADU conversions specialists

From design to permits to construction, we handle everything.

Home projects can feel overwhelming, but our expert ADU builders handle everything. From custom ADU designs and securing permits to construction and final touches, we ensure a seamless, stress-free ADU design-build experience in Los Angeles and Orange County.

Home renovations contractors

Your home should reflect your lifestyle and we make that happen.

Every ADU, home addition, or remodel we build is designed to fit your space, style, and needs. Whether it’s a modern rental unit, a cozy in-law suite, or a complete home upgrade, our expert ADU contractors in Los Angeles ensure precision and quality in every project.

Luxury ADU and guest house builders

Built by experts, designed for longevity.

Our team of expert ADU builders includes professionals from top universities like USC, UCLA, and UCI, bringing innovation and expertise to every project. We use premium materials and advanced construction techniques to ensure long-lasting quality in every ADU, home addition, or remodel we build.

Frequently Asked Questions

What is an ADU, and why should you build one?

An accessory dwelling unit (ADU) is a small, independent living space on your property. It’s ideal for rental income, guest housing, or an in-law suite for family members.

How much does it cost to build an ADU in Los Angeles?

Costs vary based on size and design. Our ADU cost calculator provides an estimate, and as a trusted ADU construction company, we offer accurate quotes and financing options.

Can you convert a garage into an ADU?

Yes! A garage conversion ADU is a popular way to add extra living space. As experienced garage conversion builders, we ensure a seamless process from permits to completion.

How do you estimate the cost of a home addition?

Use our home addition cost estimator or construction price calculator for an estimate. Our ADU design-build team in Orange County provides customized solutions to fit your budget.

Do you build ADUs in Los Angeles and Orange County?

Absolutely! We specialize in ADU projects in Los Angeles and Orange County, creating efficient and stylish living spaces.

What are the benefits of working with an ADU contractor in Los Angeles?

 A professional ADU contractor in Los Angeles, like LScontractor, ensures compliance with city regulations, high-quality construction, and efficient project management. We handle everything from custom ADU designs in Orange County to final inspections.

Do you build backyard cottages and cabins in Los Angeles?

 Yes! We design and build cabins in Los Angeles and Orange County, as well as backyard cottages for homeowners seeking extra space or rental opportunities.

Will smart home automation improve energy efficiency?

Yes! Smart home automation reduces energy waste by optimizing lighting, climate control, and appliance usage. Automated schedules and thermostat adjustments can help lower energy bills.

How secure is a smart home automation system?

Our systems use encrypted connections, multi-factor authentication, and real-time alerts to protect your home and data. Features like smart locks, motion sensors, and remote monitoring provide additional security.

Can a smart home automation system be expanded later?

Yes! Our smart home solutions are designed to be scalable. You can start with basic automation and add features like security upgrades, smart entertainment, or climate control whenever you’re ready.

How long does it take to build a attached adu in Anaheim?

Most projects take 6–9 months, including permits.

Do I need a permit?

Yes, and we handle the entire permit process for you.

Is an Attached ADU Right for You?

An attached ADU can be a smart investment for homeowners in Anaheim seeking extra space, rental income, or enhanced property value.

Investing in an attached ADU is not just about adding a new living space—it’s about creating long-term value for your property and enhancing its potential. For homeowners in Anaheim, this investment can unlock multiple benefits, including additional rental income, increased property value, and a functional space for multigenerational living or a home office. As the demand for housing continues to grow, the flexibility and financial returns of an ADU can provide substantial advantages over the years.

By constructing an attached ADU, you’re also aligning yourself with the city’s ongoing efforts to promote sustainable housing solutions, especially with the growing focus on ADUs as part of Anaheim’s zoning and housing initiatives. Moreover, with relatively low vacancy rates in the rental market, an attached ADU can serve as a steady income stream, covering expenses such as your mortgage or other home maintenance costs.

Now is the perfect time to explore whether an attached ADU is right for you and your property. To ensure a smooth and successful project, it’s highly recommended to consult with a local real estate expert or ADU specialist. They can help assess your property’s zoning, infrastructure, and design possibilities to determine how best to maximize the benefits of an ADU. Taking the first step toward understanding your options could set you on the path to a higher-quality living space, extra income, and a more valuable home for the future. Reach out today to learn more about how an attached ADU could fit your goals and become a long-term asset to your property.

 

 

Schedule Your Free Anaheim Attached ADU Consultation Today

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