Commercial Build-Out in Miami: Process, Costs & Inspections for Restaurants, Spas and Retail Spaces

Signing a lease on a commercial space in Miami is only the first step. Between the day you get the keys and the day you open your doors, there is a build-out: design, engineering, permits, construction and a series of inspections that all have to line up. When one of them slips, rent keeps running while revenue doesn’t.

As a Miami general contractor that has delivered restaurant, bakery and spa build-outs across South Florida, we’ve seen what keeps these projects on schedule and what pushes opening day back by months. This guide walks you through the full process, the requirements for different business types, the main cost drivers and the inspections you’ll need to pass.

What Is a Commercial Build-Out?

A commercial build-out is the construction work that turns an empty or previously used commercial space into a functional space for a specific business. It typically includes interior walls, ceilings, flooring, lighting, plumbing, electrical, HVAC, fire protection and finishes, all tailored to how the tenant will operate.

The scope depends heavily on the condition of the space when you lease it.

Gray Shell vs. White Box vs. Second-Generation Space

Gray shell (cold shell). The landlord delivers the structure, roof and exterior walls, often with a bare concrete floor and utilities stubbed to the space. Almost everything else is on the tenant. This gives you full design freedom but the largest scope and budget.

White box (vanilla shell). The space comes with basic finished walls, a ceiling grid, standard lighting, restrooms and base HVAC. You add the layout, specialty systems and finishes. Most retail and office build-outs start here.

Second-generation space. The space was previously built out for another tenant, often in the same industry. A former restaurant with an existing hood and grease interceptor can save significant time and money, but only if those systems meet current code and fit your layout. Always have a contractor evaluate them before signing.

Tenant Improvement (TI) Allowance Explained

Many landlords offer a tenant improvement allowance, a set amount per square foot that they contribute toward the build-out. Before you negotiate the lease, get a preliminary budget from your contractor. That way you know whether the TI allowance covers a realistic share of the work, which items the landlord pays for directly, and who owns improvements when the lease ends.

The Commercial Build-Out Process Step by Step

1. Site Evaluation and Lease Review

Before you sign, a contractor should walk the space and check electrical capacity, water and sewer connections, HVAC tonnage, ceiling heights, roof access for equipment, and ADA access to the entrance and restrooms. A space that looks perfect can require a costly electrical service upgrade or a new sewer line, and those findings belong in the lease negotiation.

2. Design and MEP Engineering

Next, an architect develops the layout, and engineers design the mechanical, electrical and plumbing (MEP) systems. For restaurants and spas, MEP design is where most of the complexity lives. Equipment selections should be finalized early, because hood size, gas loads and electrical circuits depend on them.

3. Permitting in Miami-Dade and Broward

Commercial build-outs require building permits plus separate trade permits. Depending on the business, you may also need approvals from the fire department, the health authority and environmental or utility agencies. Miami-Dade and Broward are also in the High-Velocity Hurricane Zone, so any exterior openings, rooftop equipment or storefront changes must meet stricter product-approval standards.

Permit review is one of the most common sources of delay. Our guide to avoiding permit delays in Miami covers the most frequent reasons submissions get sent back. If you want this handled for you, our permit assistance and plan review team prepares and tracks submissions from start to finish.

4. Construction Phase

Once permits are issued, construction typically moves through demolition (if needed), framing, rough-in of MEP systems, inspections, drywall, ceilings, flooring, millwork, finishes and equipment installation. In occupied shopping centers, work hours, deliveries and noise often have to follow the landlord’s rules, which affects the schedule.

Good project scheduling and coordination matters most here, because long-lead items such as kitchen equipment, storefront systems and electrical gear can hold up the entire job.

5. Final Inspections and Certificate of Occupancy

The build-out is complete only when all final inspections pass and the building department issues a Certificate of Occupancy (CO) or Certificate of Completion. Without it, you cannot legally open to the public.

Build-Out Requirements by Business Type

Restaurants and Bakeries

Food service build-outs are the most complex. Key requirements include:

• Commercial kitchen hood and exhaust designed to NFPA 96, with a fire suppression system over cooking equipment.
• Grease interceptor or grease trap sized to your operation and approved by the local utility.
• Plumbing fixtures such as hand sinks, three-compartment sinks, mop sinks and floor drains in the right locations.
• Health and food-safety approval. Public food service establishments in Florida generally need plan review and licensing through the state; some retail food operations, such as certain bakeries, fall under a different agency. Confirm which applies before design is finalized.
• Make-up air and HVAC sized for the heat and exhaust of the kitchen.

Our Maestro Italian Bakery project is a good example of how kitchen equipment, utilities and customer-facing design come together in one build-out.

Spas and Salons

Spas and salons look simpler than restaurants but carry their own requirements: added plumbing for shampoo bowls, pedicure stations or wet rooms; ventilation for chemicals and humidity; soundproofing between treatment rooms; and ADA-compliant restrooms and treatment spaces. Establishment licensing rules may also affect layout. See how we handled these in our luxury spa build-out, completed on a tight timeline.

Retail Spaces

Retail build-outs usually focus on storefront, lighting, fitting rooms, display fixtures, stockrooms and point-of-sale areas. The main risks are storefront product approvals, signage permits and coordination with the landlord’s design criteria.

How Much Does a Commercial Build-Out Cost in Miami?

There is no single price per square foot. Cost depends on the starting condition of the space, the business type and the level of finish.

Main Cost Drivers

• Starting condition of the space (gray shell vs. second-generation).
• Kitchen hood, exhaust and fire suppression.
• Electrical service upgrades and gas lines.
• Grease interceptor and plumbing relocation.
• HVAC capacity and rooftop work.
• Storefront and impact-rated openings.
• Finish level and custom millwork.
• Permit, impact and utility connection fees.

The best way to protect your budget is to price these items before signing the lease, not after.

Inspections You Need to Pass Before Opening

A typical commercial build-out goes through:

• Building inspections at each stage: framing, insulation, drywall and final.
• Trade inspections: electrical, plumbing, mechanical and gas, both rough-in and final.
• Fire inspections: fire alarm, sprinklers, hood suppression, exit signs and emergency lighting.
• Health or licensing inspections for food service and personal care businesses.

Inspections that fail add days or weeks, because re-inspections must be rescheduled. Our quality control and site inspections process checks work internally before the official inspector arrives. When the space is finished, use our final walkthrough checklist (потрібно вставити посилання зі статті 6) to confirm everything is complete before you accept it.

Common Mistakes That Delay Opening Day

1. Signing the lease before a site evaluation. Hidden electrical, sewer or HVAC upgrades surface after it’s too late to negotiate.
2. Changing equipment after design. A new oven or larger hood can mean redrawn plans and resubmitted permits.
3. Underestimating permit time. Restaurant and spa permits involve several agencies, not just the building department.
4. Ordering long-lead items late. Kitchen equipment, storefront systems and electrical panels can take weeks to arrive.
5. Hiring an unverified contractor. Always verify your contractor’s license and insurance before signing.

Real Projects: Maestro Italian Bakery and Luxury Spa Build-Out

Two recent CoreExec projects show the range of commercial work in South Florida. At Maestro Italian Bakery, the focus was on production equipment, utilities and a customer-facing retail area. The Luxury Spa Build-Out required careful plumbing, ventilation and finish coordination on a fast schedule. In both cases, early planning and tight coordination kept the owners on track to open.

FAQ

How long does a commercial build-out take in Miami? Small retail build-outs can take a few months from design to opening. Restaurants and spas usually take longer because of specialty systems and extra approvals. Permit review is often the longest single step.

Who pays for a commercial build-out, the landlord or the tenant? It depends on the lease. Many landlords provide a tenant improvement allowance, and the tenant covers the rest. Get a contractor’s estimate before you negotiate so you know what to ask for.

Can I reuse equipment from a previous restaurant in the space? Sometimes. Existing hoods, grease interceptors and walk-in coolers must meet current code and fit your layout. A contractor should inspect them before you count on reusing them.

Do I need a general contractor for a small retail build-out? Most permitted commercial work in Florida must be performed by a licensed contractor. A general contractor also coordinates trades, inspections and the landlord’s requirements.

What is a Certificate of Occupancy? It’s the document from the building department confirming the space meets code and can be occupied. You need it before opening to the public.

Ready to Start Your Build-Out?

CoreExec manages commercial build-outs across Miami-Dade and Broward, from site evaluation and permits to final inspections. Explore our commercial construction solutions or contact us for a consultation before you sign your next lease.