Two-story white stucco home exterior with dark-framed windows and tile roofline in Calabasas by RnD Builders Inc

Two-story white stucco home exterior with gray-framed windows and glass entry door in Calabasas by RnD Builders Inc

Bright living room with white brick fireplace, built-in shelves, and wide-plank hardwood floors in Calabasas by RnD Builders Inc

Minimalist sitting room with orange mid-century accent chair, tufted leather bench, and hardwood floors in Calabasas by RnD Builders Inc

Recent Work
Calabasas

CALABASAS

Home ADDITION & Remodel

Project overview

This Calabasas home addition gave a family more living space and changed how the whole house looks and works. RnD Builders Inc designed and built an approximately 700 sq. ft. first and second-story addition that blends with the original structure. As a result, every square foot earns its place.

The project expanded the existing primary suite into a spacious retreat and added an entirely new master suite. We also built a convenient outdoor bathroom for entertaining. Inside, we completed a full kitchen remodel with a modern layout, warm walnut cabinetry, white quartz countertops and black pendant lights over the island. In addition, the bathrooms now have a freestanding soaking tub, walk-in showers and brushed metal fixtures. Throughout the house, new flooring, interior doors and premium gray fiberglass windows bring in more light and improve energy efficiency. Finally, new smooth stucco gives the exterior a clean, contemporary look.

Our design-build process

Like every RnD Builders project, this home addition project followed our four-step design-build process. First, we learn your goals, style, budget and timeline. Next, our in-house design team creates custom plans and 3D renderings. Then one licensed team handles the plans, permits and construction, so the schedule stays on track. Finally, we walk through the finished space with you and review every detail.

RnD Builders Inc is a family-owned design-build contractor based in Woodland Hills and serving homeowners across Los Angeles and Ventura County. Our work has earned Best of Houzz awards from 2022 through 2026. Every home is different, so we start by listening. We then build a plan around your goals, your budget and the way your family lives, and we keep the schedule clear from day one.

Thinking about a Calabasas home addition of your own? Explore our home additions services or read about home remodeling in Calabasas. Because RnD Builders Inc is a licensed contractor, you can verify CA License #1081122 with the state board. In addition, we keep you informed at every step, from the first meeting to the final walk-through.

Calabasas home addition Gallery

Addition reviews from Google

What Addition Clients Say

5.0

Based on 49 Google reviews

Elliott Hord

Sep 7, 2026

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I connected with Roi via Reddit on a post I had regarding a construction question. I live in Sacramento and Roo lives in LA. I sent him my building plans and we hopped on a call. Roy took the time to speak to me about my plans, go over all of his concerns and details about our project. He did this out of his own time and willingness just to be a helping hand on a project he has 0 financial incentive on. we spoke for over an hour on the phone and provided his professional opinion about my ADU remodel and inspection items I had concerns with. Roi was extremely detailed and went through various scenarios to ensure our course of action and engineering recommendations made sense before spending additional money on our project. I likely will never work with him as I’m on the opposite end of the state but purely based off of my convo with him, if I was in LA I’d love to get the chance to.

Response from RnD Builders IncElliott! It was our pleasure to help and give advise on the current situation you guys have. Thank you for your kind words.

Lucky Guppy

Jul 10, 2026

I made the right decision when I hired RnD Builders to completely remodel my master bathroom and kitchen. Everything was seamless from start to finish.
Roi and the rest of the team are AMAZING and very PROFESSIONAL.
I will definitely hire them again…

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Response from RnD Builders IncWe truly appreciate your fantastic review! 😊 It's wonderful to know you felt confident in choosing us to transform your master bathroom and kitchen. Our team is delighted to hear your kind words about our professionalism. We'd be thrilled to collaborate with you again on any future projects.

Hyman Baker

Jul 27, 2025

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We needed a bit more space and decided to add a guest suite. From day one, Roi and Danielle at RnD Builders Inc took the lead with care, vision, and a clear plan. The addition integrates so naturally with our existing home that you’d never know it was new construction. Danielle’s input on the interior made the space warm and inviting, and Roi kept everything on track. We love the result—and so do our guests! Thanks a lot!

Response from RnD Builders IncThank you immensely for taking the time to share your experience. It’s wonderful to read how seamless the guest suite addition feels to your home, and we're so pleased you and your guests are happy with it! Danielle and Roi truly enjoyed bringing your vision to life. We’re here with open arms whenever you need us again!

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Spencer Trygg

May 24, 2024

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We recently completed a comprehensive home remodel, including removing walls to create an open concept kitchen, new flooring, fresh paint, and an addition off the master bedroom, and we are thrilled with the results!

Rnd Builders transformed our living space into a bright environment for our family to enjoy our space so much more, featuring new countertops, and a large island perfect for dining and socializing. The new hardwood floors provide a seamless flow throughout the house, enhancing its aesthetic and spaciousness.

We also did an ambitious add on to our master bedroom to add a walk-in closet and home office that came out phenomenal - blending right in with our existing home. Roi and Danielle went above and beyond, were professional and efficient, and completed the project on time and within budget. Our home feels brand new and the updates have created a great new space for our family and added some nice value to our property.

If you’re looking for any kind of remodel in Thousand Oaks, Roi is your man.

Response from RnD Builders IncThank you so much for taking the time to share your positive experience with our team!

Greg Levine

Mar 15, 2023

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I have hired RnD Builders to do a major remodel to my house in west hills. The project included a 510 square feet room addition, removal of support walls around the house, brand new kitchen, new flooring, and complete front yard makeover. Roi And Danielle were by far the people I felt the most comfortable with from all the other contractors who bid on the project. The project took 4 months of work, and I am extremely glad I have made the right choice by hiring them. Roi and Danielle are extremely professional, show up on time to all of our meetings, answer right away to all my questions, not wasting any time with the work. Every time I walk into my house, I smile and admire how beautiful my house became. I have already recommended them to all my friends who needed a contractor, and I will strongly advise whoever reads this review to chose RnD Builders.
Thank you very much for the beautiful remodel you did to my house, I am truly grateful!

Response from RnD Builders IncThank you Greg! We appreciate your kind words

Jodie Dean

Jan 24, 2022

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RnD Builders in Los Angeles! They understands quality and good building practices. From start to finish their attention to detail is excellent. The work site is always well organized and clean. Roy did an outstanding job overseeing the construction project. I had a room addition built and completely renovated my entire house, including remodeling my kitchen and all four bathrooms. All of the workers were friendly and fantastic at their specific trade. They were easy to communicate with and made an effort to keep the site safe. They came out, was very nice and Roy and his team was able to complete the remodeling in less than a month. All the materials were selected from his vendors and Michael was able to get us a nice discount. During the whole remodeling, Roy visited us often and informed us about the progress and any problem that came up and what solution can solve it. His honesty and professionalism proved itself during this work and we are thankful for that. I would recommend this contractor to anyone that values quality and detailed work!!!

Response from RnD Builders IncJodie! we appreciate your kind words. We happy that we could help with making your dream home!
Enjoy it, and let us know if you need anything else.

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