San Diego's Reputable Experts in Room & Home Addition

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    A company with a long-standing reputation for excellence

    We bring experience and expertise

    Lars Room Additions is one of the leading house addition companies in San Diego and the surrounding area. Backed by more than 30 years of experience in the field, our team of experts offers exceptional remodeling services, sophisticated architectural planning, and specializes in home addition projects of all kinds, including room, kitchen and bathroom additions, second-story projects, ADU construction, sunrooms, and more.

    Consult, design, and build

    Here is how we do it

    To ensure exceptional results and complete satisfaction, we give you our undivided attention from start to finish. These are the three steps of each of our home addition projects that guarantee success and satisfaction:

    On-site consultation

    On-site consultation

    The initial on-site consultation allows us to hear more about your exact needs, wishes, and requirements, and discuss the available options.

    Custom design

    Custom design

    At Lars Room Additions, we offer personalized room addition services that will suit your lifestyle and meet your needs, all within budget.

    Quality build

    Quality build

    In the final execution stage, our home addition team will use quality materials and apply proven methods to bring your vision to life.

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    Explore our offer

    Premium home addition services



    Room Addition

    Second Story

    ADU Construction

    House Addition


    Creativity, dedication, honesty

    We are your go-to home addition contractor in San Diego

    We’ve been a part of the San Diego community since 1991, and our excellent track record speaks volumes. At our company, we view each and every project as an opportunity to exceed expectations, regardless of its size or complexity. Whether you need us for a smaller-scope kitchen addition project, want us to add an entire second story to your house, or create precise architectural designs, we will deliver exceptional quality and craftsmanship. Our team always operates according to our core business values of honesty, integrity, and transparency, keeping your best interests in mind at every stage of the project.

    Full-service home additions tailored to you

    Your needs always come first

    Your opinion is what matters the most to us. Our expert team will keep you in the loop throughout every stage of the project. They will go out of their way to implement your ideas and provide you with end results that will be a true reflection of your taste, personality, and living style. In case you are still not sure what kind of home addition would work best for you, but you’re looking for a way to add value to your San Diego residence, rely on us for guidance. We will be happy to walk you through the latest remodeling trends and guide you towards the right decision for you.

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    Frequently Asked Questions

    Is it worth it to add on to your house?

    If you’re thinking about selling your property in the San Diego area and want to increase its market value, or you simply wish to add a bit of luxury and convenience to your life, then you should definitely think about a house addition. However, to achieve your goals successfully, you will need the help of a reputable certified home addition contractor.

    Reach out to our expert team and they’ll come up with a carefully designed strategy that will boost the functionality and aesthetic appeal of your home, making it hard for any prospective buyers to say no to it.

    Is a home addition a good investment?

    Kitchen, bathroom, room, second story, suite, and house additions can all play a crucial role in adding to the resale value of your property. If you plan to target serious buyers who are ready to invest more in a home that already comes equipped with a luxury kitchen or an in-law suite, then adding on to your house is undoubtedly the way to go. Schedule a consultation with us, and let’s come up with a design plan that will achieve your goals and add value to your home.

    How do I plan an addition to my house?

    House addition projects require a great deal of planning and expertise to be completed up to code. That’s why you should always rely on the professionals for help. Not only will they come up with a bulletproof plan for your home renovation project in San Diego or the area, but they’ll also prevent you from inadvertently making bad decisions that can end up costing you a fortune. Our team of architects, designers, and builders has the experience it takes to ensure that every stage of the project, from the initial planning to the final execution, goes smoothly.

    How do I design an addition to my house?

    When designing an addition to your San Diego home, be that an entire second story or a new bathroom, you want to ensure that it suits your needs and living style. That’s exactly what we can do for you! We always take the time to consult with our clients and then, based on their input, create several architectural designs to cater to your expectations and add lasting value to their home.

    Our room addition professionals will be by your side every step of the way, assisting you with all of the design decisions that come with adding to your home –  from selecting the right layout to choosing a color palette, materials, finishes, etc. Feel free to check out our previous projects to get a sense of what we can do for you.

    Is it worth it to build an ADU?

    Adding an accessory dwelling unit to your property in San Diego is undoubtedly worth it, and these are some of the top reasons why you shouldn’t wait any longer before you call your trusted local ADU contractor and schedule a consultation:

    • Increased property value: Building an ADU is one of the most efficient ways to boost the resale value of your home. So, if you’re looking for a house addition project that will provide you with a high ROI, building an accessory dwelling unit is the way to go.
    • Rental income: If you’re looking for an easy way to generate some additional income, you can always turn your ADU into a vacation rental. This option is much better than renting out a spare room on Airbnb because both you and your guests will have complete privacy.
    • Housing for adult children: If your child is almost an adult and on their way to becoming fully independent, then an ADU can be a great temporary housing solution for them. They will still be close to you but have the privacy they need.
    • Functional office space: If you work from home, why not turn your ADU into an office? You’ll have your peace and quiet and a lot of space to meet with your clients.

    As one of the leading ADU builders in the San Diego area, we are your go-to business if you’re considering building an ADU on your property. Feel free to share your needs and ideas, and our team will do everything in their power to build you an accessory dwelling unit that meets and exceeds your expectations and requirements.

    What to look for in a home addition company?

    To make sure that your home addition project will be finished on time, on budget, and up to the highest standards of quality, you need to hire San Diego’s trusted ADU and house addition contractors. Here are some of the qualities that you should be looking for:

    • Licensed & insured specialists
    • Vast experience in the field
    • Creative & customized design solutions
    • Efficient project execution
    • Excellent tradespeople
    • Excellent customer service and communication
    • Fair & transparent pricing with no hidden rates, etc.

    For over 30 years, Lars has built a tradition of trust and become one of the leaders in the home addition business in San Diego and beyond. Reach out to us today and to see how we can help you make your dream for your home become a reality.

    Who are the most reputable house addition contractors in San Diego & the area?

    If you’re searching for a trusted room, home addition & ADU construction contractor in the San Diego area, look no further than Lars Room Additions. On top of these extensive services, we also have a team of trustworthy architects who’ll render meticulous plans for your new construction. Our top-of-the-line craftsmanship, efficiency, and creativity have made us stand out from the rest for nearly 30 years and allowed us to bring the quality of our designs right into your homes.

    Schedule a consultation today, and let’s build your dream home together!