At Horizon, we believe your home is more than just four walls — it’s where life happens. It’s the place you relax, gather with family and friends, and create lasting memories. That’s why we offer a full range of exterior work services designed to elevate your outdoor living space. From patios and hardscaping to custom decks and exterior renovations, we help turn your vision into a dream yard that complements your lifestyle and enhances curb appeal.

Additions, Structured Work & ADU

Need more space or looking to enhance your home’s value? Horizon specializes in seamless home additions, from extra bedrooms to outdoor kitchens. We handle everything – design, budgeting, and material selection, ensuring all projects meet city codes and your expectations. Our commitment: your safety, satisfaction, and a smooth process from start to finish. Let’s turn your home expansion dreams into reality.

SERVICES WE OFFER

Room Additions

New Bathrooms

Interior Design

Sunroom Additions

Garages & Conversions

Extensions

Open-plan living and dining area with a vaulted ceiling and a wall of glass doors

Entryway with a curved staircase, wrought-iron railing and an arched front door

Laguna Woods, CA Bathroom Remodeling Experts - Horizon Remodeling & Construction

Formal entry and dining area with stone columns, arched openings and a curved staircase

Kitchen and living room remodel with white cabinetry, wood flooring and a wall-mounted TV

Living room with white upholstered seating, a fireplace and a staircase with a white railing

about the process

When it comes to enhancing your living space, room additions combined with Accessory Dwelling Unit (ADU) construction offer unparalleled versatility and value. These projects not only increase square footage but also provide additional living accommodations — whether for extended family, rental income, or work-from-home setups — making them a popular choice for homeowners seeking to maximize their property’s potential. According to California’s Department of Housing and Community Development, ADUs are a key solution to expanding housing options in urban and suburban neighborhoods.

Navigating the Room Addition and ADU Construction Process

At Horizon Construction & Remodeling, we understand the complexities involved in room additions and ADU construction. From the initial planning stages to the final touches, our team works diligently to ensure a seamless integration with your existing home while adhering to local building codes and regulations.

Strategic Planning for Success

Our approach to room additions and ADU construction is rooted in strategic planning and value engineering. By consolidating design, engineering, and construction services under one roof, we streamline the process and provide you with a single point of contact for accountability. Our goal is to maximize efficiency and minimize costs without compromising on quality or craftsmanship.

Efficient Design-Build Coordination

As a design-build firm, we oversee every aspect of your project, from concept to completion. Our dedicated project managers work closely with our team of skilled craftsmen to ensure that your room addition and ADU construction proceed smoothly and according to schedule. With our comprehensive understanding of local building regulations, we navigate permit procedures seamlessly, keeping your project on track every step of the way.

Maximizing Value, Minimizing Stress

We are committed to delivering maximum value for your investment while minimizing stress throughout the remodeling process. Our transparent communication and customer-focused approach ensure that your needs and expectations are met at every stage of the project. From optimizing existing structures to leveraging cost-effective materials, we strive to make your room addition and ADU construction experience as seamless and stress-free as possible.

Trusted Excellence in Remodeling

Horizon Construction & Remodeling is proud to be recognized among the top remodeling contractors in Los Angeles and Orange County areas. With a proven track record of excellence and a portfolio of successful projects, we are dedicated to exceeding your expectations. Let us help you unlock the full potential of your home with our expert room addition and ADU construction services—contact us today to schedule a consultation and take the first step toward transforming your living space.

Other Remodeling Services We Offer

Why Choose Horizon Remodeling For Additions, Structured Work and ADU

At Horizon Remodeling, we specialize in delivering high-quality home renovation solutions designed to elevate your space and increase property value. With over 15 years of experience, our team proudly serves Fullerton and the surrounding areas, offering expert craftsmanship in every project — from complete home remodels to custom additions and ADUs.

Looking to expand your living space? Our room additions and ADU construction services are built to meet your unique needs while staying compliant with California’s latest building codes. Whether it’s creating a new in-law suite, a rental unit, or a structured expansion, we ensure every detail is handled with precision.

We also provide interior renovation services such as kitchen remodeling, bathroom upgrades, painting, flooring, and garage conversions. Every project is tailored to match your vision while maximizing functionality, beauty, and long-term durability.

When you choose Horizon Remodeling, you’re not just hiring a contractor — you’re partnering with a dedicated team that values integrity, transparency, and top-tier results. Contact us today to schedule your consultation and bring your dream renovation to life.

Schedule a consultation

Clients Love

      EXCELLENT  
   Based on 98 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   conchita leslie 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently had our roof remodeled by Horizon Construction and Remodeling, and we couldn't be more pleased with the outcome. David, our project manager, was exceptional—he kept us updated throughout the process and ensured everything went smoothly. The entire experience was amazing, and we truly enjoyed working with the team. We're already planning painting and insulation work in the near future and will definitely be reaching out to David and Horizon Construction and Remodeling again
  
 
      Posted on Google  
   
   Sirous Rouhi 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mason was very polite , professional and knowledgeable. This was our 2nd with horizon homes renovation. Mason did an excellent job. The work was done in timely and professional manner. Thanks Mason I will definitely recommend you to friends and family.
  
 
      Posted on Google  
   
   Wesley Brown 
 
 
 
 Trustindex verifies that the original source of the review is Google. Horizon has done 4 projects for us and each was completed very well, on schedule, and within budget.
  
 
      Posted on Google  
   
   W Peter Vos 
 
 
 
 Trustindex verifies that the original source of the review is Google. There are so many positive things to list and describe, it is far better to wrap them all up into a single simple statement. Horizon Construction and Remodeling is a joy to work with, from planning to finish, from personnel to cost. Across the board, Horizon is excellent and we feel lucky to have found them.
  
 
      Posted on Google  
   
   Jie Hu 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great work! All individual workers (demo, shower prep, tile, electrician, plumber, wall, and shower door) worked with details, very responsible, and on time. The project management communicated with us well and did a wonderful job in organizing the work and inspections. The guest bathroom remodel took less than four weeks.
  
 
      Posted on Google  
   
   Jeanne McEntire 
 
 
 
 Trustindex verifies that the original source of the review is Google. After two years in my home in Dana Point, I was finally ready to remodel my kitchen. I knew what worked and didn’t work for me and my family. I chose Horizon to do my project, and am so pleased with the results! David was always available, was very detail oriented, and made amazing suggestions along the way. His crew were hard working and took good care of my home. My single story home is now fully open concept with new floors, fireplace, paint and of course the star of the home- the kitchen with the huge porcelain topped island,  and top of the line finishings. Thank you, Horizon!  I whole heartedly recommend you for anyone looking to remodel their home!
  
 
      Posted on Google  
   
   Marlene Baker 
 
 
 
 Trustindex verifies that the original source of the review is Google. Mark was here this morning to check out our Bathroom and we are sad we missed him!  We wanted to give him a great big thank you and a hug!  Please tell him thanks from us!  Thanks to you too Enna, Caroline, Anna, Sam and your whole crew!  You all have made this experience very pleasant! All of you have been kind, considerate and made us feel like we mattered!  We appreciate you! We absolutely love our bathroom!  It's beautiful and works so much better for us!  I have been posting pictures and telling friends and family about the whole experience!  I have one lady who may redo her bathrooms and another today that asked for your name to give to her daughter!  We will continue to brag about you and our bathroom Thank you again! Marlene and Dennis
  
 
      Posted on Google  
   
   Eva A 
 
 
 
 Trustindex verifies that the original source of the review is Google. There is some hiccups but overall I am satisfied with the quality of work. Just make sure that you include absolutely everything in the contract.