Understanding the 30% Rule in Interior Home Remodeling

The 30% rule is commonly discussed as a planning guideline suggesting that a remodeling project may become more complex when its scope reaches a substantial portion of an existing home. It is not a universal substitute for project-specific review. The actual implications can depend on the proposed work, local requirements, existing conditions, structural changes, and whether architectural or building permits are needed.

No. The phrase may be used differently depending on the context, jurisdiction, or professional discussing it. Interior finish updates, cabinetry, alterations, additions, and structural work can have different design and permitting considerations. A project should be evaluated based on its actual scope rather than a percentage alone, with the appropriate municipal requirements reviewed before design and construction decisions are finalized.

It can. Permit requirements may apply when remodeling involves changes to building systems, layout, structure, life-safety elements, or other regulated work. Requirements vary by project and municipality. Ortiz Mexia Projects, Inc. provides building permit procurement and guidance for residential projects, helping coordinate design information with clients, consultants, contractors, and municipal agencies.

The guideline can encourage homeowners to define priorities before selecting finishes or expanding the work. A clear scope helps establish which rooms, systems, architectural elements, and interior details are included. During design, the team can then evaluate how remodels, additions, cabinetry, built-ins, and construction requirements relate to the existing home and to the intended long-term result.

Not every interior project requires an architect, but architectural guidance can be valuable when a remodel includes alterations, additions, permitting, coordination with contractors, or an integrated design vision. Ortiz Mexia Projects, Inc. works across interior design and residential architecture, helping connect spatial planning, materials, cabinetry, sustainability, and construction guidance within a coordinated project.

Yes. Custom cabinetry and built-ins can be developed as part of a broader interior remodeling project or as carefully integrated elements within a home. Their design can respond to storage needs, spatial proportions, material choices, and the character of adjacent rooms. Ortiz Mexia Projects, Inc. provides coordinated cabinetry and built-in design with an emphasis on practical, lasting solutions.

Yes. The practice provides construction administration and project guidance, coordinating with clients, consultants, and general contractors through the project phases. This support helps maintain alignment between the design intent, documentation, permitting, and implementation. Services may extend from initial design through construction completion and, where applicable, the Certificate of Occupancy.

The company’s listed service areas are Los Angeles, CA, and Roaring Fork Valley, Colorado. Specific projects are arranged by appointment and may involve remodels, additions, alterations, interiors, cabinetry, furniture, and related residential design support. Homeowners should discuss their property and project scope during an initial conversation to determine whether the practice is a suitable fit.