Addition Building & Design, Inc. stands as a premier residential design-build firm headquartered in Sherman Oaks, California. Specializing in high-end custom home construction, complex hillside developments, and large-scale renovations, the company has established a reputation as a "one-stop shop" for homeowners in the Greater Los Angeles area, including Beverly Hills, Malibu, and the Hollywood Hills. Under the leadership of founder Mike Ross and managing principal Christine Ross, the firm integrates architectural design, structural engineering, and construction management into a unified process.

The Design-Build Model as a Strategic Advantage

The traditional construction process often involves a fragmented approach where a homeowner hires an architect and a general contractor separately. This frequently leads to communication breakdowns, budget overruns, and finger-pointing when design plans encounter structural realities. Addition Building & Design Inc utilizes the design-build model to mitigate these risks.

By maintaining all phases of a project—from initial concept and permitting to the final walkthrough—under a single contract, the firm ensures that the design is feasible within the client's budget from day one. This integration allows for real-time adjustments. For instance, if a specific material or structural element exceeds the projected cost during the design phase, the construction team can immediately propose alternatives without the need for lengthy back-and-forth between independent entities.

Specialized Expertise in Hillside and Difficult Lot Construction

Building in Los Angeles presents unique geographical challenges, particularly in desirable areas like Pacific Palisades and Studio City. Hillside construction requires a deep understanding of soil stability, complex foundation systems, and strict municipal grading regulations.

Addition Building & Design Inc has carved out a niche in managing these "difficult" lots. Their expertise includes:

  • Caisson and Grade Beam Foundations: Utilizing deep-drilled piers to anchor structures into stable bedrock on steep inclines.
  • Retaining Wall Systems: Designing and engineering walls that manage lateral earth pressure while maintaining the aesthetic integrity of the property.
  • Environmental Compliance: Navigating the specific environmental impact reports and hillside ordinances required by the Los Angeles Department of Building and Safety (LADBS).

Fire-Resistant Home Building Strategies

In the wake of increasing wildfire risks across Southern California, the firm has prioritized fire-resistant construction methodologies. This is not merely about compliance with Chapter 7A of the California Building Code; it is about proactive resilience. Their approach includes the use of non-combustible exterior cladding, specialized eave venting designed to resist ember intrusion, and interior fire suppression systems. For homeowners rebuilding after a loss, the firm provides specialized consultation on site selection to minimize future risks through defensible space planning and fire-resistant landscaping.

Leadership Rooted in Legacy and Innovation

The operational success of Addition Building & Design Inc is driven by a blend of generational experience and modern technological adoption.

Mike Ross: Decades of Construction Excellence

With over 30 years in the industry, Mike Ross is recognized as a leader in residential construction. His background is characterized by a commitment to craftsmanship and an early adoption of sustainable building practices. His leadership has seen the company recognized repeatedly by Qualified Remodeler magazine as one of the Top 500 companies in the United States.

Christine Ross: Integrating Technology and Client Experience

Managing Principal Christine Ross has been instrumental in modernizing the firm’s workflow. Named to Professional Builder Magazine’s "Top 40 Under 40," she has implemented advanced project management software that bridges the gap between the construction site and the homeowner. This technology provides clients with daily digital updates, including photos and schedule milestones, ensuring total transparency throughout the lifecycle of the build.

Comprehensive Residential Services

The firm’s portfolio spans a wide array of residential needs, catering to both new builds and the transformation of existing structures.

Custom Home Design and New Construction

The firm handles projects ranging from $2.5 million to over $20 million. Each custom home is treated as a unique living experience, tailored to the client’s specific lifestyle and aesthetic preferences—whether that be ultra-modern contemporary, Mediterranean, or traditional Spanish restoration.

Whole House Renovations and Additions

For homeowners looking to expand their footprint without moving, Addition Building & Design Inc specializes in:

  • Second-Story Additions: Seamlessly integrating new levels into the existing architectural style.
  • Primary Suite and Great Room Expansions: Creating modern, open-concept living spaces with high-performance features.
  • Accessory Dwelling Units (ADUs): Leveraging California's ADU laws to create guest houses, home offices, or rental units that match the quality of the main residence.

Award-Winning Kitchen and Bathroom Remodels

Recognized nationally for interior design, the firm focuses on "chef-inspired" kitchens and "spa-like" bathrooms. These renovations often include custom cabinetry, smart home automation, high-end appliance integration, and luxury finishes like steam showers and heated flooring.

The "No Change Order" Guarantee and Pricing Transparency

One of the most significant pain points in residential construction is the "change order"—unexpected costs added during construction that were not in the original bid. Addition Building & Design Inc addresses this through a "No Change Order" guarantee for their construction contracts.

This is achieved through a rigorous pre-construction phase. Before a single shovel hits the ground, the firm establishes precise costs and design specifics. Their transparency extends to their bidding process; they share actual subcontractor bids with the client before applying their own management fees. This level of financial disclosure is rare in the luxury construction market and serves to build long-term trust with high-net-worth clients.

Sustainable Building and Green Certifications

As a member of the National Green Building Council and certified by "Build It Green" in California, the firm emphasizes energy efficiency and sustainability. This involves:

  • High-Performance Envelopes: Advanced insulation and window systems to reduce HVAC loads.
  • Sustainable Materials: Utilizing reclaimed wood, low-VOC paints, and recycled content materials where possible.
  • Smart Systems: Integrating home automation that manages lighting and climate control to optimize energy consumption.

Regional Reach and Community Impact

While based in Sherman Oaks, the firm’s impact is felt across Los Angeles County. They serve a diverse range of neighborhoods, from the coastal retreats of Santa Monica and Redondo Beach to the historic districts of Hancock Park and Pasadena. Their work on historic restorations (HPOZ) demonstrates a respect for architectural heritage combined with the necessity of modern structural upgrades.

Summary of the Design-Build Experience

Addition Building & Design Inc provides a sophisticated, technology-driven approach to luxury residential construction. By combining architectural creativity with rigorous engineering and transparent project management, they eliminate the typical stressors associated with building a home in Los Angeles. Their focus on hillside expertise, fire-resistant design, and a "No Change Order" policy positions them as a strategic partner for homeowners seeking precision and peace of mind.

Frequently Asked Questions

What is the typical cost of a project with Addition Building & Design Inc?

Project costs vary significantly based on scope. Custom homes typically range from $2.5 million to $20 million. Whole house renovations generally fall between $150,000 and $2 million, while high-end kitchen remodels can range from $150,000 to $750,000.

How long does the design-build process take?

A comprehensive project involving both design and construction can take anywhere from 12 to 24 months. This includes the initial design phase (3-6 months), the permitting process with the city (which varies by jurisdiction), and the actual construction (9-18 months).

Does the firm handle the permitting process?

Yes. As part of their design-build service, the firm manages all aspects of permit expediting, including structural plans, architectural drawings, and negotiations with local building departments and homeowners' associations (HOAs).

Can they build on steep hillside lots?

Yes, hillside and "difficult" lot construction is one of the firm's core specialties. They have extensive experience in the Hollywood Hills, Malibu, and other areas requiring advanced engineering and foundation work.

What is the "No Change Order" guarantee?

This guarantee means that once the construction contract is signed and work begins, the firm will not charge extra for items that were included in the original scope of work. This protects the homeowner from the common industry practice of low-balling a bid and then increasing the price via change orders during construction.