Commercial Build-Out Cost Drivers: How to Budget a St. Louis Interior Project

Commercial build-out budgets vary because two spaces with the same square footage can require completely different amounts of construction. Existing conditions, demolition, partition density, ceiling systems, finish selections, plumbing locations, electrical requirements, fire protection changes and schedule constraints are usually more important than raw floor area alone.

Interior construction costs increase when walls extend to structure, multiple layers of Type X gypsum board are required, ceilings are high, specialty acoustical systems are specified, finishes are premium or work must occur after hours. Retail, restaurant, medical and franchise projects can also carry detailed brand standards and coordination requirements.

The safest budgeting process is trade-by-trade. Separate demolition, carpentry, framing, drywall and finish, ACT, painting, flooring and finish carpentry, then identify MEP and specialty scopes separately. That makes scope gaps easier to see and gives the owner or GC a more useful basis for value engineering.

Salem Developments provides commercial general contracting and interior construction services for tenant improvements, retail and franchise build-outs, offices, medical spaces, restaurants, industrial interiors and multifamily/commercial renovation in the St. Louis market.

Related services and next steps: Commercial Tenant Improvements • Commercial Build-Outs • Request a Commercial Bid