Addition Building & Design Inc.

Addition Building & Design Inc. is a Los Angeles design-build firm offering custom home building, additions, renovations, ADU construction, and outdoor living spaces. Their integrated approach covers planning, permitting, and construction for residential projects across LA.

Addition Building & Design Inc. – ADU Contractor in Sherman Oaks, CA

About Addition Building & Design Inc.

Addition Building & Design Inc. — Residential Construction Services in Los Angeles, CA

Addition Building & Design Inc. is a Los Angeles-based design-build firm offering integrated residential construction services. Their approach covers every phase of a project, from architectural and structural planning through permitting and construction. This single-point-of-responsibility model is intended to keep communication clear and project progress transparent throughout.

Custom Home Building

For homeowners looking to build from the ground up, Addition Building & Design Inc. handles custom home projects with an emphasis on planning, design, and execution. Their experience includes work on hillside and challenging lots, which require additional structural consideration. Services in this area include:

Custom home design and planning
Hillside and difficult lot construction
Fire-resistant construction solutions
Open and modern floor plan development
Permit expediting and real-time project tracking

Their process aims to balance aesthetics with structural performance, particularly relevant for properties in fire-prone or topographically complex areas of the Los Angeles region.

Home Additions and Major Renovations

Addition Building & Design Inc. also works on existing homes, managing additions and large-scale renovations. Projects in this category are handled with attention to architectural continuity — ensuring that new construction integrates with the existing structure rather than feeling disconnected. Their renovation and addition services include:

Second-story and structural additions
Full-home remodels and expansions
Primary suite and great room enhancements
Architectural and structural planning support
Kitchen and bathroom design

These projects range from targeted room upgrades to comprehensive whole-home transformations, with the goal of improving both function and livability.

ADU and Guest House Construction

As an ADU contractor serving the Los Angeles area, Addition Building & Design Inc. offers construction of accessory dwelling units and guest houses as part of their outdoor living and property expansion services. Whether the goal is a detached ADU, a backyard cottage, or a granny flat, their team manages the design and build process with the same integrated approach applied to their larger residential projects. This includes navigating local permitting requirements, which can be a significant factor in ADU development in California.

Outdoor Living Spaces

Beyond the main structure, Addition Building & Design Inc. designs and builds exterior features suited to the California climate. Their outdoor living services are designed to extend the functional area of a home and include:

Custom swimming pools, spas, and water features
Covered patios, trellises, and decks
Outdoor kitchens and BBQ areas
Fire pits and entertaining zones

Site conditions, structural integrity, and indoor-outdoor flow are all considered during the design process to ensure these spaces are practical as well as visually cohesive with the main residence.

Overall, Addition Building & Design Inc. positions itself as a full-service residential construction company for homeowners in Los Angeles who are planning new builds, additions, ADU projects, or significant renovations. Their design-build model is intended to reduce the complexity of managing multiple contractors and consultants across a single project.

Services

Addition Building & Design Inc. performs the following services

Architecture & Design
Permit Specialist
Construction
Finishing & Fit-out

Addition Building & Design Inc. Reviews

Linda Wehrli

2025-09-25

"These are the only people I trust to work on my vintage property. They are respectful, knowledgeable, trustworthy, and clean up after each job. I can't recommend them highly enough."

naser jamal

2022-12-08

"We hired Addition Building Design to renovate our kitchen. We're delighted and excited at the finish product. Mike, the owner of Addition Building Design went above and beyond to surpass our expectations. His team which included a fantastic designer, experienced cabinet makers, tile setters, diligent electricians, and plumber worked collaboratively to build our family a custom kitchen. Raul was amazing and a man of many talents. The craftsmanship is evident in the final product. Cost was reasonable and competitive. Time frame was reasonable and consistent with building a large custom kitchen. We are incredibly happy with our elegant custom kitchen. Thank you Mike for building our family this amazing custom kitchen. Were going to enjoy this kitchen for many years to come."

Christopher Intagliata

2022-12-06

"We did a complete gut remodel on a 1928 house, and trusted Mike Addition Building and Design with the project. They knocked it out of the park. Mike is a no-nonsense contractor - he was quick to come by for an estimate, and gave us very competitive pricing. We appreciated Mike's transparency as well. Unlike a lot of companies that ask you to pay 2-3k for them to draw up some plans before even giving you quotes for a scope of work, Mike had a detailed breakdown of costs in our hands for every element of the project, within a week of his visit to the property. About the job itself - Mike's core crew of builders are incredibly professional and do great work. And all the subs he uses for tile, flooring, cabinetry, countertops, plumbing and electric are top of class. We had lots of people from different trades coming and going from the property during renovations, and people from other trades would comment on the quality of the drywall work, the plaster, the tile, etc. I can't stress enough the craftsmanship these people brought to the job, and they did a gorgeous job incorporating the historical details and architecture of our house with the new modern elements. Finally, every time we had questions about any part of the process, Mike was available by phone or text to guide us through any concerns, from design to construction to permitting, and he stopped by the property at least once a week to check on the work and review progress with us. His years of experience are evident. Finally: Mike's team got this job done in record time, and when he promised us three months to completion, he came through. The project did go a little longer than initially quoted, but that's because we added a few extras onto the project after seeing what a nice job his team was doing. We wouldn't hesitate to use Addition Building Design again - and would wholeheartedly recommend hiring them for your job. You'll be in good hands."

Renee Goldin

2016-02-23

"Mike Ross is our first choice for contractors. He has nearly completed a home addition project of 1000 square feet including master bedroom suite, sun room and covered patio. He began with a very comprehensive professional contract, detailing every aspect of the project. That contract went through many revisions by my husband and I. Unfortunately we had experience other contractors that were dishonest and vague so we felt it necessary to have everything in writing which Mike Ross gladly provided. The workmanship of every team has been just as professional and exemplary as our personal experience with him. Mike has project managers and ours is Chris L., who is quite a gem. Day to day issues are met with the project manager however Mike follows the project closely and regularly pays site visits. He is very direct, honest and transparent. He does weekly updates on schedules and his crews work diligently to complete each phase on time. They provide a very clean work site and are sensitive to the chaos a large project presents to the homeowner. This is a top concern to the entire Addition Build and Design team. We cannot be more pleased the the outcome of our project. We are ever grateful for the personal and professional approach Mike Ross has to his company and his profession. He raises the bar for general contractors and we definitely would highly recommend him for your next home project."

Jenny Scahill

2012-07-09

"I needed an addition on my small guest house and when I found Mike I knew he was who I wanted. He gave me a clear proposal outlining what he would do each week, along with the payments that would be due. Mike always came to oversee the work and always kept me informed of what was going on with the work as well as with the city. His workers are very personable, professional, and clean. In all, my experience with Mike was great. We are very happy with our new addition and in the future will be coming back to Mike for any other work. I highly reccomend him to anyone looking for an honest contractor!"

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Specifics

Luxury Builds

Opening hours

Monday 7:00AM - 7:00PM

Tuesday 7:00AM - 7:00PM

Wednesday 7:00AM - 7:00PM

Thursday 7:00AM - 7:00PM

Friday 7:00AM - 7:00PM

Saturday 7:00AM - 7:00PM

Sunday 7:00AM - 7:00PM

Location

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About Addition Building & Design Inc.