BuildGrade Guide
Commercial Build-Out Levels: Why Two Similar Buildings Have Very Different Costs
Two 10,000 sqft buildings can have construction budgets that differ by hundreds of thousands of dollars. The building footprint isn’t the variable. The build-out level is. Here’s what each level actually includes — and what it costs.
By Alex Wright · Updated June 2026 · 10 min read
Cold Shell
$38–$62/sqft
Storage, warehouse, equipment
Vanilla Shell
$55–$80/sqft
Contractor bays, flex parks
Specialized
+$25–$80/sqft
Brewery, kitchen, coffee roaster
Why the Same Building Can Cost Very Different Amounts
Most early-stage development budgets start with square footage. That’s the right instinct, but building size explains less of the cost variance than most people expect.
Consider two developers, each building 10,000 sqft of commercial space on identical sites. One builds non-climate self-storage. The other builds a commercial kitchen facility for food entrepreneurs. From the road, the buildings look similar. The construction budgets won’t be.
Self-Storage (Cold Shell)
~$450K–$620K
Slab, steel shell, roll-up doors, basic lighting. No HVAC, no plumbing beyond a manager’s office, no interior finishes. The business model doesn’t require any of that.
Commercial Kitchen (Specialized)
~$950K–$1.6M
Same shell — plus grease interceptor, Type I hood with fire suppression, commercial plumbing throughout, food-safe flooring, upgraded electrical, and health department plan review. Same footprint. Different business requirements.
The difference isn’t the building. It’s what goes inside it — and specifically, what the tenant’s business actually needs to operate.
All cost ranges on this page reflect 2026 U.S. averages and vary significantly by region, building size, labor market conditions, utility availability, and local code requirements. Use as a planning reference, not a substitute for local contractor bids.
The Four Build-Out Levels
Each level represents a meaningful step in cost and tenant-readiness. The right level depends entirely on who is going to occupy the building and what their business requires.
| Level | Typical Cost | Tenant Ready? | Common Use |
|---|---|---|---|
| Cold Shell | $38–$62/sqft | No | Storage, warehouse |
| Shell | $44–$68/sqft | Partial | Large commercial, NNN with TI |
| Vanilla Shell | $55–$80/sqft | Mostly | Contractor bays, flex parks |
| Fully Built-Out | $80–$130/sqft | Yes | Professional office, medical |
| Specialized | $95–$160+/sqft | Depends | Kitchen, brewery, coffee roaster |
Cold Shell
Typically Includes
- ✓Concrete slab
- ✓Structural framing
- ✓Exterior walls and roof
- ✓Basic overhead and man doors
- ✓Minimal electrical rough-in
- ✓No interior finishes
Does Not Include
- –HVAC
- –Finished interior walls
- –Restrooms
- –Tenant plumbing
- –Lighting beyond code minimum
Best For
Self-storage, warehouses, equipment storage, agricultural buildings
Most self-storage facilities are cold shell by design. The business model doesn't require climate control or finished interiors — and that's where the cost efficiency comes from.
Shell
Typically Includes
- ✓Everything in cold shell
- ✓Utility service stubbed to the building
- ✓Electrical panel and basic distribution
- ✓Water and sewer connections
- ✓LED lighting throughout
- ✓Restroom rough-ins (no fixtures)
Does Not Include
- –Finished restrooms
- –HVAC distribution
- –Interior partitions
- –Office buildout
Best For
Multi-tenant commercial developments where tenants will self-finish; early-stage flex development with a known tenant
Shell delivery is common in larger commercial parks where tenants negotiate their own improvements as part of a long-term NNN lease. The landlord delivers the infrastructure; the tenant builds what their business needs.
Vanilla Shell
Typically Includes
- ✓Insulated walls and liner
- ✓LED lighting throughout
- ✓3-phase electrical service per bay
- ✓Finished restroom (shared or per unit)
- ✓Basic HVAC in office area
- ✓Tenant-ready overhead doors
Does Not Include
- –Specialty equipment or plumbing
- –Full warehouse HVAC
- –Industry-specific infrastructure
- –Custom office buildout
Best For
Contractor bays, multi-tenant flex parks, fitness studios, tutoring centers, professional offices with warehouse
Vanilla shell is the standard for multi-tenant flex parks. It's what most tenants mean when they say "move-in ready" — though the exact definition varies by market and contractor. Always confirm what's included before comparing bids.
Fully Built-Out
Typically Includes
- ✓Finished offices and conference rooms
- ✓Full HVAC throughout
- ✓Completed restrooms
- ✓Flooring, paint, and interior finishes
- ✓Reception and common areas
- ✓Full electrical distribution
Does Not Include
- –Industry-specific specialty infrastructure
- –Tenant furniture and equipment
Best For
Medical offices, professional services, educational facilities, retail with storage
Full buildout is appropriate when the tenant profile demands it and local rents support the higher cost. Over-building for tenants who would have been satisfied with vanilla shell is one of the most common budget mistakes in flex development.
The “vanilla shell” definition problem
Vanilla shell is the most misunderstood term in commercial construction. Two contractors can both call their scope a “vanilla shell” and be $80,000 apart on a 10,000 sqft building — because one includes 3-phase electrical service to each bay and the other doesn’t. Always get a line-item scope alongside any per-sqft number, and confirm what’s in and out before comparing bids.
What Actually Drives the Cost Difference
Building size is a starting point. These line items explain most of the variance between two buildings of similar square footage.
HVAC
8–15% of total costThe range is wide because decisions vary enormously. No warehouse HVAC vs. full building conditioning adds roughly $14/sqft averaged over total building area — on a 10,000 sqft building, that's $140,000. Office-only HVAC (the most common approach for flex) adds roughly $6/sqft. Most flex developers heat the warehouse with tenant-installed gas unit heaters and HVAC only the office component.
Plumbing
5–12% of total costStandard restrooms run $8,000–$18,000 each. Commercial kitchens triple or quadruple this. Breweries and food producers require floor drains throughout, upgraded water service, and sometimes sewer pre-treatment. Plumbing scope is the most variable cost item between tenant types.
Electrical Service
4–9% of total cost3-phase service to each bay, individual sub-metering for NNN leases, and higher-amperage service for industrial tenants. Budget $30,000–$45,000 for a standard 10-bay flex building; specialty uses can push this to $80,000–$120,000.
Office Buildout Percentage
5–15% of total costFinished office space typically costs $50–$65/sqft more than vanilla warehouse space. At 20% office on a 10,000 sqft building, that's 2,000 sqft × $55/sqft premium = $110,000 in additional cost. Pushing to 30% office adds another $55,000. The office percentage decision has a larger budget impact than most developers initially expect.
Specialty Tenant Improvements
10–30% of total costEverything from grease interceptors to floor drains to fire suppression systems to tasting room finishes. These are the items that make a specialized build-out cost 2× a vanilla shell. They're also the items most likely to be underestimated or left out of early-stage budgets.
Site Utilities and Connections
4–7% of total costOn many commercial sites, bringing utilities to the building costs more than the connections themselves. 3-phase electrical upgrades at the transformer can run $8,000–$25,000. Sewer capacity upgrades for high-discharge uses are highly site-specific — get a utility quote before site selection, not after.
Specialized Build-Outs: What Each Business Actually Needs
Beyond the four standard levels, specialized uses require infrastructure that standard tenants never need. This is where the cost gap between “same building” scenarios becomes very real.
Contractor Bay
Overhead door (12×14 ft standard), concrete apron, basic electrical, small office. The baseline case. Designed for contractors who need to drive in, work, and drive out.
Key Cost Items
- ·Overhead door: $1,500–$3,500 per door
- ·Concrete apron: $3–$5/sqft outside the door
- ·3-phase electrical: included in vanilla shell
- ·Small office buildout: $3,000–$8,000 per bay
Watch Out For
Undersizing bay depth is the most common mistake. 40 ft deep feels adequate on paper; 50 ft deep is the right minimum once you account for trucks with trailers.
Light Manufacturing
3-phase power (required for most equipment), clear height of 16–18 ft minimum, grade-level loading access, and a durable concrete floor. Most light manufacturers prioritize floor area and electrical capacity over office space — a 10% office footprint is typical vs. 20–25% for standard flex.
Key Cost Items
- ·3-phase electrical (200–400A per bay): $8,000–$18,000
- ·Clear height upgrade to 18 ft: +$1–$2/sqft over 14 ft clear
- ·Overhead crane rough-in (if required): $5,000–$15,000
- ·Compressed air distribution: $2,500–$6,000
Watch Out For
CNC equipment, laser cutters, and other precision machinery often have high single-circuit amperage draws that undersized panels can't support. Confirm the electrical capacity before signing a lease or finalizing the panel design — under-spec'd electrical service is the most common manufacturing tenant complaint.
Coffee Roaster
Natural gas service, specialty ventilation for roasting exhaust, upgraded electrical for roasting equipment (often 200–400A per unit), loading access, and a retail/tasting area if the concept includes direct sales.
Key Cost Items
- ·Gas service stub and meter: $3,000–$8,000
- ·Specialty ventilation (make-up air + exhaust): $15,000–$35,000
- ·Upgraded electrical service: $8,000–$18,000
- ·Loading dock or grade-level door: included in vanilla
Watch Out For
The ventilation system often requires city or county approval for commercial roasting — especially in suburban areas with noise and odor ordinances. Confirm permitting requirements before finalizing utility plans.
Brewery or Distillery
High clear height (18–24 ft for fermentation tanks), floor drains throughout, upgraded water service, sewer capacity for high-volume discharge, specialty ventilation, 3-phase power, and often a tasting room requiring commercial finish.
Key Cost Items
- ·Floor drains throughout: $8–$18/sqft
- ·Sewer capacity upgrade: $15,000–$50,000+ (site-dependent)
- ·High-ceiling structural upgrade: $3–$6/sqft
- ·Water service and backflow prevention: $5,000–$15,000
- ·Tasting room finish (if applicable): $45–$75/sqft for that area
Watch Out For
Sewer capacity is the most unpredictable cost item. The local utility's requirements for high-volume discharge vary significantly — some require on-site pre-treatment. Get a sewer capacity determination from the utility before signing a brewery lease.
Commercial Kitchen
Grease interceptor, Type I exhaust hood with fire suppression, upgraded electrical (400–600A typical), commercial plumbing throughout, floor drains, food-safe floor finishes, and health department plan review before construction begins.
Key Cost Items
- ·Grease interceptor: $8,000–$20,000
- ·Type I hood + Ansul fire suppression: $25,000–$60,000
- ·Commercial plumbing (drains, fixtures, sinks): $20,000–$45,000
- ·Upgraded electrical: $12,000–$28,000
- ·Food-safe flooring (epoxy or tile): $6–$14/sqft
Watch Out For
Commercial kitchens are the highest TI cost per sqft of any common flex tenant type. The health department review process can also add 2–4 months to the permitting timeline. Budget accordingly.
Woodshop or Fabrication
Dust collection system (can be tenant-installed), upgraded electrical service (3-phase and high-amperage circuits), clear height 16 ft minimum (18 ft preferred for CNC equipment), compressed air distribution, and durable concrete floor with no coatings that trap dust.
Key Cost Items
- ·Electrical service upgrade (200–400A per bay): $8,000–$18,000
- ·Dust collection rough-in (landlord-provided): $3,000–$8,000
- ·Compressed air rough-in: $2,500–$6,000
- ·Clear height upgrade to 18 ft: +$1–$2/sqft over 14 ft clear
Watch Out For
Tenant-installed dust collection is the norm — most landlords provide the rough-in but leave the equipment to the tenant. Confirm electrical capacity covers both the machines and the dust collector; under-spec'd panels are common.
Fitness Studio
Full HVAC with higher-than-standard air exchange rates, resilient sprung or rubber flooring, upgraded restrooms (showers typically required), sound insulation between units in multi-tenant buildings, and parking ratios that may be higher than standard industrial code.
Key Cost Items
- ·Full HVAC upgrade: $8–$14/sqft over office-only
- ·Resilient flooring (rubber or sprung): $5–$12/sqft
- ·Shower-capable restrooms: $8,000–$18,000 per restroom
- ·Sound insulation between party walls: $3–$6/sqft of party wall
Watch Out For
Parking ratios for fitness studios are typically set by commercial, not industrial, zoning standards — often 1 per 150–200 sqft rather than 1 per 300 sqft. Verify before selecting a site, as this can significantly affect how many studio sqft your site can legally support.
Estimating specialized build-outs before you have a contractor
Specialized build-outs have more estimation uncertainty than standard construction because the cost drivers are highly site- and market-specific. A commercial kitchen buildout that runs $55,000 in the Southeast might run $90,000 in the Pacific Northwest once local labor rates, health department requirements, and utility connection conditions are factored in.
Getting estimates from two or three local commercial contractors matters more here than for a standard flex build — and the selection process should go beyond the number. Ask specifically: have they permitted a commercial kitchen with the local health department before? Have they coordinated a brewery’s sewer capacity upgrade with the local utility? The gap between contractors who’ve done it before and those who haven’t tends to show up in surprises during construction, not in the initial bid.
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Which Build-Out Level Fits Your Tenant
Developers who build too little struggle to attract tenants. Developers who build too much spend capital on improvements tenants never needed. The goal is matching build-out level to the actual requirements of the tenant type you’re targeting.
Self-Storage
Month-to-month tenants storing goods need weather protection and a lock. HVAC and finishes add cost with no corresponding rent upside in most markets.
Warehouse / Distribution
Standard industrial users typically handle their own improvements. A shell gets them utility connections they need without expensive finishes they don't.
Contractor Bay
Contractors need 3-phase power, overhead doors, a functional restroom, and basic lighting. Vanilla shell delivers all of this — over-building adds cost with no meaningful rent upside.
Light Manufacturing
Power and clear height are the primary requirements. A well-spec'd vanilla shell (3-phase, 16 ft clear) handles most light manufacturing uses; heavy equipment and specialized processes add cost from there.
Fitness Studio
HVAC upgrade and resilient flooring are required; everything else from vanilla shell works. Plan for higher parking requirements.
Coffee Roaster
Ventilation and gas service are the key additions. A well-designed vanilla shell is the right starting point; gas and ventilation are the specialty layer.
Brewery / Distillery
High ceilings, floor drains throughout, and sewer capacity drive the cost. The building infrastructure investment is significant — but brewery tenants tend to be long-term and invest heavily themselves.
Commercial Kitchen
The highest TI cost per sqft of any common tenant type. Hood, suppression, grease interceptor, and health department requirements make this one of the most expensive build-outs in the flex universe.
Professional Office
Office tenants expect move-in-ready finishes: reception, conference rooms, restrooms, flooring. Delivering anything less typically means a longer lease-up or lower rents.
Education / Enrichment
Preschools and tutoring centers need finished interiors, accessible restrooms, appropriate HVAC, and parking/drop-off circulation that often requires additional civil engineering.
Common Build-Out Mistakes
Assuming every tenant wants the same finish level
A contractor who pulls trucks in and out doesn't need drywall. A tutoring center can't function in a cold shell. Understanding what your target tenants actually require — before you build — is the most cost-effective research you can do.
Not defining 'vanilla shell' before comparing bids
Two contractors can both call their scope a 'vanilla shell' and be $80,000 apart on a 10,000 sqft building. What's included varies by contractor, market, and project. Always get a line-item scope alongside any per-sqft number.
Ignoring utility requirements during site selection
A brewery that needs sewer capacity upgrades, a commercial kitchen that needs a grease interceptor connected to a main line, a coffee roaster that needs gas service — these utility requirements vary dramatically by site location. Discovering them after contract can be very expensive.
Over-building for a tenant you don't have yet
Building a specialized commercial kitchen on spec, hoping a food tenant shows up, is a high-risk strategy in most markets. Vanilla shell with thoughtful utility rough-ins (gas stub, floor drain rough-in, upgraded electrical panel) gives you flexibility without the full specialty TI cost.
Underestimating the office percentage cost impact
Adding 10% more finished office to a 12,000 sqft flex building is 1,200 sqft × $55 premium = $66,000. Developers running quick per-sqft estimates often miss this because the office cost is buried in a blended rate.
Next Step
Model the build cost for your specific project
Use the BuildGrade calculators to get a cost estimate adjusted for your building size, finish level, and region. The flex space calculator lets you dial in bay configuration, office percentage, and HVAC scope — the three levers that drive most of the variance.
If you want to go one step further on underwriting assumptions, this DealForge guide on how to analyze a flex space investment is a solid companion to the build-out framework above.
Related Guides & Calculators
Frequently Asked Questions
What is the difference between a cold shell and a vanilla shell?
A cold shell is the bare structure — slab, framing, exterior walls, roof, and basic doors with minimal electrical. It's weather protection and little else. A vanilla shell adds insulation, LED lighting throughout, 3-phase electrical service per bay, a functional restroom, and HVAC in the office area. Vanilla shell is the standard for multi-tenant flex parks and contractor bay developments. Cold shell is more common for self-storage, warehouses, and owner-occupied industrial builds.
How much more does a commercial kitchen cost to build than a contractor bay?
A contractor bay at vanilla shell finish runs $55–$80/sqft. A commercial kitchen build-out typically runs $95–$160/sqft all-in — a $40–$80/sqft premium driven by the grease interceptor ($8,000–$20,000), Type I hood with fire suppression ($25,000–$60,000), commercial plumbing throughout, and food-safe floor finishes. Commercial kitchens are the highest-TI tenant type in the flex universe.
What is a vanilla shell in commercial real estate?
Vanilla shell is a commercially finished but tenant-neutral space. In most markets it includes insulated walls, LED lighting, 3-phase electrical service, a functional restroom, and basic HVAC in any office area. The exact definition varies by market and contractor — always confirm line-item inclusions before comparing bids. Vanilla shell is the de facto standard for multi-tenant flex parks, contractor bay developments, and smaller commercial retail centers.
Why does a brewery cost so much more to build than a standard flex bay?
The building shell isn't the expensive part of a brewery — the utility infrastructure is. Breweries require floor drains throughout (not just one in a corner), significantly higher water and sewer capacity, high clear heights for fermentation tanks (18–24 ft vs. the standard 14–16 ft), and specialty ventilation. Sewer capacity upgrades alone can run $15,000–$50,000+ depending on what's at the property line. Plan the utility scope before you commit to a lease or site.
Should I build vanilla shell on spec or wait for a tenant?
For contractor bays and standard flex, building vanilla shell on spec is the most common approach in supply-constrained markets — the tenant pool is broad and lease-up is typically fast. For specialized build-outs (commercial kitchen, brewery, coffee roaster), the conventional wisdom is to identify a committed tenant before investing in the specialty infrastructure. The one exception: a few well-designed utility rough-ins (floor drain stub, gas service, oversized electrical panel) add modest cost but make your vanilla shell space much more attractive to specialty tenants later.
How does office percentage affect flex space build cost?
Finished office space costs $50–$65/sqft more than vanilla warehouse space. At 20% office on a 10,000 sqft building — that's 2,000 sqft — you're adding $100,000–$130,000 to the project. Going from 10% to 20% office on the same building adds $50,000–$65,000. The office percentage decision has a larger budget impact than most early-stage estimates show, because the premium is often left out of blended per-sqft numbers.
What does a fully built-out commercial space include?
A fully built-out space is ready for immediate occupancy: finished offices, conference rooms, reception, full HVAC throughout, completed restrooms, flooring, paint, and all interior finishes. Typical cost ranges from $80–$130/sqft depending on finish quality and market. Fully built-out delivery is most appropriate for professional offices, medical users, and educational facilities — tenant types that need move-in-ready space and can support rents that justify the higher construction cost.