The retail-to-restaurant conversion wave is hitting Palm Beach County hard. Landlords who once held out for national retail tenants are now actively courting food and beverage operators. Strip centers along PGA Boulevard, Military Trail, and US-1 are turning into dining destinations — and for good reason. But here's what most prospective restaurant owners don't hear until they're already committed to a lease: converting a vanilla retail shell into a functioning restaurant is one of the most technically complex and cost-intensive construction projects in commercial real estate.

This isn't a renovation. It's a full systems overhaul. If you're planning a retail-to-restaurant conversion in South Florida, this guide will walk you through every major scope item, realistic cost ranges, permit requirements, and the timeline you should actually plan for — not the one your leasing agent described.

The Scope of a Retail-to-Restaurant Conversion

1. Structural Work

Most retail boxes are built as open, column-free spaces with suspended ceilings at 9–10 feet. Restaurant kitchens have completely different spatial requirements. You may need to:

  • Open or relocate walls to create the kitchen footprint, service corridor, and dining zones
  • Reinforce existing floors to support heavy commercial kitchen equipment — walk-in coolers, commercial ranges, and hood systems can collectively weigh thousands of pounds
  • Raise ceilings in the kitchen area to accommodate commercial hood systems, which typically require 7–8 feet of clearance above the cooking surface plus duct chase space above that
  • Core-drill concrete slabs for new plumbing penetrations — a significant cost item that surprises first-time restaurant developers

In older retail buildings common along South Florida's strip centers, structural surprises are frequent. Always get a structural engineer of record on board before finalizing your kitchen layout design.

2. Plumbing — The Grease Trap Issue

This is where most retail-to-restaurant conversion budgets get blown. Florida law and Palm Beach County Utilities require a grease interceptor (grease trap) on all food service establishments. This is not optional and is not negotiable.

Key facts every restaurant developer needs to understand:

  • Size is code-driven, not preference-driven. Palm Beach County Utilities sizes interceptors based on fixture count — the number of sinks, floor drains, and dishwashers connected to the interceptor. A 1,500-gallon in-ground interceptor is typical for a mid-size restaurant; larger operations may require 2,000–3,000 gallons.
  • In-ground excavation is required in most cases. This means cutting through concrete slab, excavating, setting a precast concrete vault, and backfilling. If the site has underground utilities, poor soil conditions, or a high water table (very common in South Florida), costs escalate significantly.
  • Trench drains are required throughout the kitchen floor and must slope to the interceptor. This involves extensive concrete cutting and re-pouring — budget $15,000–$40,000 for slab work alone depending on kitchen size.
  • Hand-wash sinks, a three-compartment sink, a mop sink, and dishwasher rough-in are all required by Florida Department of Business and Professional Regulation (DBPR) for food service licensing.

3. Mechanical — Hood Systems, HVAC, and Fire Suppression

Commercial kitchen mechanical work is its own specialty. A standard retail HVAC system is completely inadequate for restaurant use — and replacing it is one of the largest line items in any conversion.

  • Type I Exhaust Hood: Required over all cooking equipment that produces grease-laden vapors (ranges, fryers, grills, griddles). Type I hoods capture both heat and grease and connect to a dedicated grease duct that must be fully welded and enclosed in a fire-rated chase. Health department requires hoods to be NSF-listed (National Sanitation Foundation certified).
  • Make-Up Air Unit: For every CFM of air exhausted through the hood, a corresponding volume of conditioned or tempered make-up air must be supplied. Undersizing make-up air is the most common mechanical error in restaurant construction — it creates negative pressure, causes doors to be hard to open, and fails health inspection.
  • HVAC Upgrade: Commercial kitchens generate enormous heat loads. The existing retail HVAC will not be sufficient. Plan for a dedicated kitchen exhaust/make-up air system plus separate dining room HVAC, often requiring rooftop unit replacement or addition.
  • Fire Suppression (Ansul System): Required inside the hood over all cooking equipment. The system must be designed by a licensed fire suppression contractor, reviewed by the fire marshal, and integrated with the building's fire alarm system. Inspection and certification required before health department approval.

4. Electrical — Service Upgrades and Dedicated Circuits

Commercial kitchen equipment is power-hungry. A standard retail space typically arrives with 200-amp service. A full-service restaurant kitchen may require 400-amp to 600-amp service, depending on equipment. This means coordinating with FPL for a service upgrade — a process that can add 4–8 weeks to your project timeline if not initiated early.

Every major piece of kitchen equipment requires its own dedicated circuit:

  • Walk-in cooler and freezer condensing units
  • Commercial ranges, ovens, and fryers
  • Dishwasher (often 3-phase)
  • Hood make-up air unit and exhaust fan
  • Ice machines, reach-in coolers
  • POS systems, lighting controls, music/AV systems

Bar areas with ice wells, speed rails, and under-counter refrigeration add further electrical complexity. If you're building a full bar, budget for a dedicated panel sub-feed to the bar area.

5. Permitting — Multiple Agencies, Simultaneous Submissions

A retail-to-restaurant conversion in Palm Beach County requires permits from multiple agencies, often submitted simultaneously to avoid sequential delays:

  • Building permit (architectural, structural drawings) — from your local municipality (City of WPB, Palm Beach Gardens, North Palm Beach, Lake Park, or unincorporated Palm Beach County)
  • Plumbing permit — covers grease interceptor, drain lines, fixtures
  • Mechanical permit — covers hood system, make-up air, HVAC
  • Electrical permit — covers panel upgrades, circuits, lighting
  • Fire suppression permit — reviewed by the local fire marshal, separate from building department
  • Health department plan review — Florida DBPR reviews kitchen layout, equipment specifications, and plumbing for food service licensing; this is separate from building permitting and runs on its own timeline

Having all drawings coordinated and submitted simultaneously — rather than sequentially — can save 4–8 weeks on project timeline.

6. ADA Compliance

A retail space typically has one accessible restroom. A restaurant with more than a minimum occupancy threshold generally requires two separate accessible restrooms (one per gender, or two gender-neutral accessible restrooms). This often means building or significantly expanding restrooms — a significant cost in a conversion where restroom plumbing is being added from scratch.

Realistic Cost Ranges

These ranges reflect South Florida market conditions as of 2025–2026 and include all hard and soft costs (construction, permits, architect/engineer fees) but not equipment, furniture, or FF&E:

  • Basic food service (counter service, café, fast casual) from vanilla retail shell: $140–$200 per square foot
  • Full-service restaurant with full kitchen and bar from vanilla retail shell: $200–$325 per square foot
  • Premium or high-design full-service restaurant with bar: $325–$450+ per square foot
  • Add $30–$50 per square foot for dark shell conversions (spaces with no existing MEP infrastructure)

A 2,500 sqft full-service restaurant build-out from a vanilla retail shell will typically run $500,000–$800,000 in hard construction costs before equipment and FF&E. That is the realistic number. Anyone quoting significantly below this range is either missing scope or has not accounted for South Florida labor and material costs.

Timeline: What to Actually Expect

  • Space planning and design: 4–8 weeks
  • Engineering and permit document preparation: 4–8 weeks (concurrent with design)
  • Permit review and approval: 6–14 weeks depending on municipality and complexity
  • Construction: 16–26 weeks for a full-service restaurant
  • Health department inspection and food service license: 2–4 weeks after construction complete
  • Total from lease signing to open doors: 6–12 months

Tenants who sign a lease expecting to open in 90 days consistently face financial distress. Your rent clock starts at lease execution. Build your pro-forma around 8–10 months of pre-opening carrying costs.

The Three Budget Killers in Retail-to-Restaurant Conversions

1. Undersized Grease Trap

Health department and utilities review your menu, fixture count, and seating — and they size the interceptor accordingly. What looked like a 1,000-gallon interceptor in early planning often becomes a 2,000-gallon vault once engineering is complete. The excavation and concrete work to accommodate the larger vault can add $20,000–$50,000 to the project.

2. Inadequate Electrical Service

FPL service upgrades take time and cost money. If your existing retail space has 200-amp service and your kitchen load requires 400-amp, the FPL upgrade process — application, engineering, installation — can take 8–16 weeks. Not discovering this until mid-construction is a serious schedule risk.

3. HVAC Capacity Discovered Late

Existing rooftop units may be physically incapable of being upsized. If the roof has structural constraints or inadequate equipment wells, you may be looking at supplemental systems, new roof penetrations, and significant mechanical re-engineering. This is best caught in pre-construction, not during framing.

Why Pajaziti & Associates for Your Restaurant Conversion

We've built and converted restaurant spaces throughout Palm Beach County, and we understand the full technical scope from the first conversation. We don't hand you a number that looks good in a lease negotiation and then walk it up during construction. We identify the grease trap size, the electrical service requirements, and the HVAC load in pre-construction — before you sign anything that commits your money.

Our team manages all permit submissions simultaneously across building, plumbing, mechanical, electrical, fire, and health departments. We coordinate directly with Palm Beach County Utilities on interceptor sizing and with FPL on service upgrade timelines. We know what North Palm Beach's building department needs, what the Palm Beach Gardens fire marshal looks for, and how to move through unincorporated county permitting without unnecessary delays.

If you're evaluating a retail space for restaurant conversion anywhere in Palm Beach, Broward, or Martin County, get us in the door before you sign your lease. A one-hour pre-lease walkthrough can save you six figures in budget surprises.