Existing Building Expansion and New Construction

We help St. Louis property owners expand their buildings while keeping the project on time and within budget

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.

Metropolitan Build's Design-Build Construction team at a job site for a building renovation project

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.

Hotel amenity renovation

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.

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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.

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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.

Construction managers reviewing documents for program development
Pre-construction and renovation process

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.

Commercial renovation project equipment
Campbell House Museum Interior Renovation

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.

Why St. Louis Developers and Property Owners Have Trusted Metropolitan Build For 40+ Years

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Existing Building Specialists

We’re fluent in the language of existing buildings, unlocking their distinctive potential to meet your program’s needs and budget.

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Expertise in historic building preservation

We understand the specific challenges of historic building renovation, including the qualification and certification of your project.

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Strong understanding of funding programs

We know the government programs that will help you secure the maximum amount of funding and tax credits available.

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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.

Frequently Asked Questions

Metropolitan Build has experience expanding a wide range of property types across St. Louis and the Midwest, including schools, universities, medical facilities, hospitality properties, commercial office buildings, and so much more. If your building has room to grow vertically, horizontally, or through interior reconfiguration, we can help you explore expansion options.

A horizontal expansion extends the building’s footprint outward, typically requiring additional land area and new foundation work. A vertical expansion adds one or more floors on top of an existing structure and requires a careful assessment of the building’s current load-bearing capacity. Metropolitan Build evaluates both options during the feasibility phase to determine which best fits your site, budget, and program goals.

Yes. Metropolitan Build specializes in occupied facility construction, using phased construction strategies to allow active facilities to remain fully or partially operational throughout the project. We design construction sequences to minimize disruption to staff, tenants, customers, and day-to-day operations.

Existing building expansions can leverage your current property, infrastructure, utilities, and structural systems to preserve your brand equity and operational continuity. For property owners in the St. Louis Region, modifying a current building may be more efficient than starting from scratch in a new location.

Metropolitan Build is Ready to Be Your St. Louis Building Expansion Contractors

Contact our team today to learn more about our Existing Building Expansion and New Construction.