Expand Your Space. Grow Your Reach.
Whether it’s expanding student housing, a commercial property accommodating increased foot traffic, a historic facility integrating ADA and safety code requirements, or a historic residence adding modern amenities, our team of building expansion specialists is here to assist.
Expert Building Expansion Construction Services Across St. Louis and the Midwest
Every commercial building expansion is carefully planned to ensure architectural continuity, structural integrity, and minimal downtime for your ongoing operations during execution.

Vertical & Horizontal Building Expansion
We help with strategic building additions that can increase your building’s usable square footage with vertical or outward additions.

Structural Additions & Tie-Ins
New building sections are seamlessly integrated with existing structural systems and layouts through high-quality engineering and construction.
Occupied Facility Expansion
Phased construction allows spaces like hotels, schools, and healthcare buildings to remain in use throughout the expansion process.
Foundation & Structural Systems Expansion
Updated or new foundations and load-bearing systems are included in the design and engineering to ensure support for building growth.
Updated Building Systems
From roofing to mechanical, we ensure your building systems are built to function well in the additional space. This can mean expanding or updating your electrical, plumbing, sprinkler, sewer, water, or fire protection systems for your project.
Exterior Envelope Matching & Extension
We ensure building aesthetics and architecture are matched and transition well throughout extensions of façades, roofing systems, and exterior materials.
Expansion of historic structure and non-profit museum
Featured Project
Campbell House Museum Renovation and Expansion
“Their performance was an A+. I couldn’t have asked for more.”
Metropolitan Build worked with the Campbell House Museum on their historic renovation and expansion project. This structure is the oldest free-standing residential structure and has been converted to one of the top tourist attractions in the St. Louis area. The collaboration added an accessible entrance and elevator, as well as space for additional programming.
Our Building Expansion Process
Whether you need end-to-end support or a contractor for a specific phase, Metropolitan Build delivers.
Program Development
We begin by conducting an in-depth assessment of your vision, objectives, and available resources, while carefully considering budgetary constraints and specific benefits and challenges of the site. This analysis informs the development of a comprehensive program document, which serves as a guide for the project’s continued progress.
Preliminary Design, Budgeting, and Pre-Construction
We conduct feasibility studies, assist in pro forma development, identify specific supplemental funding sources, assemble a highly qualified team, and initiate preliminary design work. At every stage, we ensure that the project aligns with program requirements, functional objectives, design standards, and budgetary constraints.
Design Build Construction
Once construction is underway, we execute the pre-construction plan with precision, upholding the highest standards of care, quality, and craftsmanship. We oversee every facet of the renovation, ensuring seamless coordination among contractors and specialists.
Post-Construction and Project Support
Our post-construction services encompass warranty management that ensures long-term peace of mind regarding the health and performance of your building, as well as additional renovations or expansions.
Markets We Serve for Building Expansion
We have decades of experience expanding a large array of building types and industries.
Why St. Louis Developers and Property Owners Have Trusted Metropolitan Build For 40+ Years
Existing Building Specialists
We’re fluent in the language of existing buildings, unlocking their distinctive potential to meet your program’s needs and budget.
Expertise in historic building preservation
We understand the specific challenges of historic building renovation, including the qualification and certification of your project.
Strong understanding of funding programs
We know the government programs that will help you secure the maximum amount of funding and tax credits available.
Full Service Design-Build Partner
We engage a talented and experienced team to foster inspiration, drive creative problem solving, and deliver comprehensive project support.
Have Other Questions?
We’re happy to talk through your project needs or renovation timeline. Call to speak with our team.











