The short answer: Cold shell, warm shell, vanilla box, and white box describe how finished a commercial space is when the landlord hands it over, from bare walls and a concrete floor up to a space with working HVAC, lighting, a ceiling, and restrooms. But none of these terms has one fixed meaning. The same phrase can mean different things to different landlords, brokers, and contractors. The only reliable way to know what you’re getting is an itemized description of the delivery condition in your lease or work letter.
Picture this. Your lease says the space will be delivered as a “vanilla shell.” You picture finished restrooms, a ceiling, lights, and air conditioning ready to go. On delivery day you find a concrete floor, plumbing stubbed out of the slab, and an HVAC unit on the roof with no ductwork inside.
Nobody necessarily lied. You and the landlord just meant different things by the same two words. Below: what each term usually means, why you can’t count on any of them, the items that cause the biggest surprises, and how to pin it all down before you sign.
Why don’t these terms have a standard meaning?
Because the industry never settled on one. Writing in the American Bar Association’s Probate & Property magazine, Stephen Liss notes that terms like grey shell, white box, warm white shell, bare shell, and arctic shell can “take on a different meaning even to those working in the same region.”
Even the shopping center industry’s trade group, ICSC, defines a vanilla box loosely. Liss quotes it describing a vanilla box as “a space partially completed by the landlord based on negotiations between tenant and landlord.” In other words, it’s whatever the lease says it is.
Broker websites don’t agree either. Some treat “white box,” “vanilla shell,” and “warm shell” as the same thing. Others treat a white box as one step more finished. That’s not a problem if your lease spells it out. It’s a big problem if it doesn’t.
What does each term usually mean?
Use this as a rough map, not a definition. Your landlord’s version may differ.
| Term you’ll hear | What it often includes | What’s often missing |
|---|---|---|
| Cold shell, gray shell, or dark shell | Exterior walls, roof, and a concrete floor; utilities may be brought to the building or the space | Working HVAC, ceiling, lighting, restrooms, interior walls, and finishes |
| Warm shell | The shell plus basic HVAC, electrical, and plumbing connections | Ductwork throughout, ceiling, lighting, restrooms, and finishes may or may not be included |
| Vanilla shell or vanilla box | A warm shell plus some combination of a ceiling, basic lighting, drywalled perimeter walls, restrooms, and fire sprinklers | Interior walls, final flooring, paint, data cabling, and anything specific to your business |
| White box | Often similar to a vanilla shell; some landlords include primed walls and a finished ceiling | Your layout, finishes, fixtures, and specialty systems |
| Second-generation space | Whatever the last tenant built, sometimes partly demolished | It depends entirely on what’s left and what condition it’s in |
| Turnkey | The landlord builds the space to an agreed plan for your use | Whatever the plan leaves out, which is why the plan matters |
Which items cause the biggest surprises?
These are the systems where “I assumed it was included” turns into an expensive surprise. Ask about each one by name.
| Item | Why it matters | What to ask |
|---|---|---|
| HVAC | A unit on the roof isn’t the same as cooling the whole space | What size is the equipment, how old is it, and does ductwork reach the space, or just a stub? |
| Electrical service | Your equipment may need more power than the space has | What size is the service and panel, and where exactly does the landlord’s work stop? |
| Plumbing | “Stubbed” lines still need fixtures, connections, and possibly trenching the slab | Where are the water, sewer, and vent lines, and are they sized for your use? |
| Restrooms | Count and accessibility depend on your use and occupant load | How many restrooms are included, and are they built to current accessibility rules? |
| Fire sprinklers and alarm | Heads and devices usually need to move once walls go in | Is the system in place, and who pays to modify it for your layout? |
| Ceiling and lighting | A “finished ceiling” can mean grid with no tiles | What ceiling type and light level are included? |
| Floor slab | Uneven or cracked concrete adds prep cost before flooring | Will the slab be level and patched, and who pays for trenching? |
| Walls and storefront | Perimeter walls may be bare studs or finished drywall | Are perimeter walls insulated, drywalled, taped, and ready for paint? |
If you’re opening a restaurant, add grease waste, exhaust, and gas to that list. Those are rarely part of a standard shell.
Who pays for what starts from a colder shell?
Generally, the less the landlord delivers, the more of your budget goes to base building systems before you get to anything your customers will see. That’s one reason build-out quotes for similar-sized spaces can be so far apart. Our guide to what a commercial build-out costs in Los Angeles and Orange County breaks down where the money usually goes.
A colder shell isn’t automatically a bad deal. It may come with lower rent, a larger tenant improvement allowance, or more freedom to lay out the space your way. The point is to compare offers on the same basis: what’s delivered, plus what you’ll have to build, plus how the allowance covers it.
Does a shell space come with permits for my build-out?
Usually not. The shell and your tenant improvement are typically permitted separately, and your build-out needs its own plans, permits, and inspections.
The City of Los Angeles is one example. A Department of Building and Safety bulletin on core and shell certificates of occupancy says tenant improvement permits are required for areas not built out as part of the core and shell. If your use isn’t one the shell’s certificate of occupancy already identifies, the bulletin says you’ll need a separate change of use permit and a certificate of occupancy for your space. Other cities handle this their own way, so check with yours.
That matters for scheduling. “Delivered” from the landlord’s side doesn’t mean “ready to open” from the city’s side.
How do I get the delivery condition in writing?
The fix is simple: replace labels with lists. Liss’s advice in the ABA piece is to use “a work letter containing a definite description of the required condition of the premises,” rather than terms both sides think they understand but don’t.
Before you sign, make sure your lease or work letter includes:
- An itemized list of landlord work, system by system, not just a label like “vanilla shell”
- Equipment sizes and capacities (HVAC, electrical service, water and sewer line sizes)
- Drawings or a spec sheet attached as an exhibit
- A clear line between landlord work and tenant work, item by item
- Whether landlord work will be permitted and inspected, and finished before delivery
- A delivery date and what happens if the landlord is late
- A walkthrough at delivery and a list of deficiencies the landlord must fix
- Who pays for code upgrades your build-out may trigger
For the bigger picture of what to verify before signing, see our pre-lease checklist for a space you’ll build out.
What can I check myself, and when should I bring in help?
You can usually handle: walking the space with a camera, reading the delivery language in the lease, asking the landlord or broker the questions above, and requesting any drawings or equipment information they have.
Bring in help when: you need to know whether the HVAC, power, or plumbing can actually support your business (a contractor or design professional), when the lease language is vague or one-sided (your attorney or broker), and when you’re comparing two spaces delivered in different conditions and need real numbers for each.
Frequently asked questions
What is the difference between a cold shell and a warm shell? A cold shell usually has walls, a roof, and a concrete floor with little or no working HVAC, lighting, or restrooms. A warm shell usually adds basic HVAC, electrical, and plumbing connections. The exact line depends on your lease.
What does vanilla shell mean in a commercial lease? It usually means a space with basic building systems and some finishes, such as a ceiling, lighting, and restrooms, ready for the tenant’s own layout and finishes. There’s no standard definition, so get the specifics in writing.
Is a white box the same as a vanilla shell? Sometimes. Some landlords and brokers use the terms interchangeably, while others treat a white box as slightly more finished. Ask for an itemized list.
Does a shell space include restrooms? Not always. A cold shell often has none. Many vanilla shells include them, but the number and whether they meet current accessibility rules vary.
Do I need my own permit if the landlord delivers a shell? Usually, yes. Your build-out typically needs its own plans, permits, and inspections, and a new use may need its own certificate of occupancy. Rules vary by city.
Looking at a space and not sure what you’re really getting?
The best time to find out what a “warm shell” actually includes is before the lease is signed, while there’s still room to negotiate the work letter, the allowance, or the rent.
De Sisto Construction, Inc. is a California licensed general contractor (CSLB #803545) serving greater Los Angeles and Orange County since 2001, with commercial work including tenant improvements, build-outs, offices, retail, and restaurants. We put together step-by-step outlines and line-item project costing, so you can see what a space will take to open before you commit. Learn more about our commercial build-out services for businesses.
Give us a call at 562-425-1050 or email us at info@desistogc.com (dcidirect.net)