As-Is vs Warm Shell vs Turnkey: Which Delivery Saves Me the Most?

What each delivery method actually means

The label on a listing is marketing, not a contract, so get the scope in writing before you compare a single dollar. As-is means the space transfers in its current condition — that might be raw concrete or a previous tenant's worn-out fit-out. You own every dollar of construction and every surprise behind the walls. Cold shell is the barest version: no HVAC distribution, no restrooms, no ceiling grid, no demising walls separating you from the next unit. It carries the cheapest base rent and the most expensive buildout.

Warm shell — sometimes called a vanilla shell or vanilla box — means the landlord delivers the core systems: HVAC, restrooms, fire sprinklers, electrical service, demising walls, and often a finished ceiling grid. You add the flooring, paint, lighting, casework, and branding on top of that base. Turnkey means the landlord builds the entire space to your approved plan and hands you the keys ready to operate; you bring furniture and inventory and essentially nothing else.

The most expensive mistake here is two landlords quoting "shell" who mean opposite things. One "warm shell" includes tonnage, ducting, and two finished restrooms; another is bare slab and an electrical panel. Always attach a delivery-condition exhibit to the lease that spells out exactly what is installed — slab condition, demising walls, electrical capacity in amps, HVAC tonnage, restroom count, and sprinkler coverage. Ambiguity in that exhibit is where five-figure surprises live, and "industry standard" is not a defense you can enforce in a dispute. Treat the exhibit as the real deal terms and the marketing label as noise.

The cost-shift math that actually decides it

Every delivery method moves cost between two buckets: your capital, a lump sum you pay now, and your rent, a stream you pay monthly for years. Nothing is genuinely free — the money changes which bucket it lives in and who holds the risk while the work happens. Understanding that shift is the whole game, because a quote sheet only shows you one bucket at a time.

Run representative numbers on a 5,000 sq ft deal. As-is or cold shell carries the lowest base rent — say $24/sq ft — but you fund roughly $120/sq ft of buildout from your own cash, which is about $600,000 out of pocket before you open the doors. Warm shell sits in the middle: base rent around $28/sq ft with roughly $70/sq ft of buildout on you, splitting the burden with a landlord who has already absorbed $35–$55/sq ft of base work. Turnkey carries the highest base rent — around $31/sq ft — but zero buildout cash from you. The landlord amortizes the construction into rent, typically at a 7–9% implied interest rate, and keeps the improved asset at the end of the term.

The honest total-cost comparison is stark. As-is might cost $500,000-plus in up-front cash but the lowest rent stream. Turnkey costs $0 up front but adds roughly $15,000–$30,000 per year in rent — about $150,000 over a seven-year term. The as-is tenant with capital comes out ahead on paper. The tenant without that capital is comparing a survivable operating expense against a company-ending capital expense, and for them the "more expensive" turnkey is the only path that keeps the business alive. The right answer is not universal; it is a function of your balance sheet.

When turnkey saves you the most

Turnkey wins when cash is the binding constraint and the landlord wants the deal badly enough to fund it. The clearest advantage is risk transfer on overruns. If a $600,000 buildout runs 20% over budget, that $120,000 is the landlord's problem, not yours — you agreed to a rent number, not a construction budget. You also avoid construction-loan interest on your side of the ledger, skip the general-contractor management headache entirely, and often open faster if the landlord has an in-house construction team that mobilizes quickly.

The cost of all that is the rent premium, and the discipline is to model it as an interest rate. Take the buildout the landlord is fronting, divide the annual rent premium by it, and you have the effective rate they're charging. If that implied rate over the lease term is less than your buildout cost plus the interest you'd actually pay to borrow the money yourself, turnkey is the cheaper path — not just the easier one. Do this arithmetic before you fall in love with the $0 up-front line.

On most five-to-ten-year deals for finish-heavy spaces, the math favors turnkey for anyone who isn't sitting on idle capital. It is also the right default for a first-time operator with no construction experience: the lowest sticker price is meaningless if a buildout you can't supervise stalls and pushes your opening date — and your first revenue — three months to the right. A predictable move-in date has real dollar value that a quote sheet never prices in.

When as-is saves you the most

As-is wins when you have capital and the existing improvements carry real value. The strongest case is second-generation space: a former restaurant taken by a restaurant, a former clinic taken by a clinic. The plumbing, hoods, grease traps, exam-room sinks, and heavy electrical are already installed, and you inherit $50–$150/sq ft of prior-tenant work for the price of a cleanup and cosmetic refresh. Buying that infrastructure new would dwarf the rent you're saving, so the savings are real and immediate.

As-is also gives you control. You pick the trades, the finishes, and the quality level, and you don't pay a landlord's markup on complex or specialized work. Because you own the buildout outright, there's no rent premium riding on your monthly payment for the next decade — the payback is short and permanent. As-is deals also come with the lowest base rent, and a sharp tenant stacks a tenant improvement (TI) allowance on top of that low rent to offset the work they're self-performing, capturing the low rate and a landlord contribution at the same time.

The requirement is that you can genuinely fund and manage the project. As-is with no capital and no construction experience is not a bargain — it's a trap that looks like one on the quote sheet. The lowest headline rate turns into the highest total cost the moment an overrun or a delay you can't absorb lands on your desk, so be honest about your capacity to run a build before you sign for one.

How the math flips with lease length

The "cheapest" delivery method changes the moment you factor in how long you'll occupy the space, because turnkey's cost is amortized over the term. A $0-cash turnkey on a three-year lease can quietly cost more per month than an as-is deal you paid for and depreciated, because the landlord is recovering the full buildout — plus an 8–10% implied return — over just 36 months instead of 120. Time is the multiplier that either rewards or punishes each structure.

For a short lease (three years or less), lean turnkey or warm shell. You won't occupy long enough to recover a big out-of-pocket buildout, and sinking $150/sq ft into a space you're leaving soon is money you'll never earn back. Let the landlord carry the construction risk and walk away clean at expiration.

For a medium lease (five to seven years), you're in the negotiation sweet spot. Push for a TI allowance — commonly $30–$70/sq ft in many markets — layered on top of a warm shell, and self-perform the finishes you actually care about. You control quality on the parts that matter without funding the base systems, and you split the risk sensibly with the landlord.

For a long lease (ten years or more), as-is can win outright if the rent reduction is steep enough. You amortize your own buildout over a decade, keep control of every construction decision, and trade taking the space rough for a deeply discounted base rent. The quick rule: if the landlord's turnkey premium works out to more than roughly 7–8% annually on the buildout they're fronting, take the allowance and build it yourself — assuming you have the cash and the appetite to manage it.

The hidden costs that wreck the comparison

Base rent and buildout dollars are the headline; the line items below are where tenants get quietly skinned, and each one belongs in writing before you sign. "Warm shell" versus true warm shell isn't legally standardized, so a delivery-condition exhibit listing slab, demising walls, amps, HVAC tonnage, restroom count, and sprinkler coverage is your only protection against a paper-thin definition that saves the landlord money at your expense.

Permitting and code-trigger costs ambush as-is tenants the second they pull a permit. Current code often demands ADA-compliant restrooms, updated fire and life-safety systems, and accessible parking ratios the old space never had. These upgrades can run $15–$60/sq ft and are almost always your problem in an as-is or warm shell deal unless you negotiate the burden onto the landlord up front. Older second-generation space is especially exposed here.

Unused TI allowance is usually lost — most landlords let it evaporate rather than pay it out, which pressures tenants to overbuild just to spend it. Negotiate the right to apply leftover allowance to free rent instead. Ownership of the improvements at lease end matters too: in turnkey and TI-funded deals the landlord typically owns the fit-out, and a restoration clause can force you to rip it out and return the space to shell at your expense — a back-end cost that erases your front-end savings. Finally, soft costs — architect, MEP engineering, permit fees, project management — add 8–15% on top of hard construction. Turnkey buries them in the rent; as-is and warm shell put them squarely on your invoice.

The signature trap in each delivery type

Each method has a characteristic failure mode worth naming out loud. The as-is trap is hidden conditions: demand a building-condition assessment covering roof age, HVAC tonnage and remaining life, electrical capacity, ADA gaps, and any environmental issues. A $40,000 HVAC replacement you didn't know about wipes out the rent savings that made the deal attractive in the first place, and slab or roof problems can be far worse.

The warm shell trap is vague scope — insist the delivery exhibit specify how many tons of HVAC, ducted where, and controlled how, rather than the single word "HVAC." The turnkey trap is cheap finishes and change-order games: attach your finish schedule and plans as a lease exhibit, define an allowance per finish category, and require that the landlord pay for any change order that deviates from the approved plans, so a "value-engineered" substitution isn't sprung on you at handoff.

The universal trap applies to all three: rent commencing before the space is usable. Tie rent start to substantial completion, verified by your architect's sign-off — not to the lease date, not to a calendar target, and never to the landlord's own say-so. Every week of rent on a space you can't operate in is pure loss, and it is the single most common way a good delivery deal turns sour at the finish line.

Related questions

How do I decide fast when the quotes are already in front of me?

Score four questions instead of staring at per-square-foot numbers: Do I have capital and the stomach to manage construction? How specialized are my space needs? How long am I staying? How motivated is the landlord? The answers point to one method more reliably than any single price line on the sheet.

Does NNN change which delivery method saves the most?

Not the buildout math directly. Triple net means you pay your share of taxes, insurance, and maintenance on top of base rent regardless of delivery type. But a low as-is base rent with heavy NNN charges can erase its savings, so fold NNN into your true monthly cost before comparing options.

Should I still push for a TI allowance on a turnkey deal?

Usually the allowance is the turnkey — the landlord's build is the contribution. Where TI shines is warm shell: a $30–$70/sq ft allowance layered on low base rent lets you self-perform finishes without funding base systems. Always confirm whether unused TI is forfeited, amortized, or refundable.

What if the market is soft and vacancy is high?

Push hard for turnkey and free rent together. Landlords in soft markets absorb buildout costs to fill space, so leverage sits with you. In a tight market with low vacancy, a warm shell plus a modest TI allowance may be the best terms you can realistically extract.

What's the fastest way to compare two delivery quotes fairly?

Convert both to a single number: total occupancy cost over the full term, including buildout cash, the rent stream, NNN, soft costs, and any restoration liability. Divide by months to get a true blended monthly figure. The lower blended number wins, regardless of which headline rate looked cheaper.

FAQ

What's the actual difference between as-is, warm shell, and turnkey? As-is means you take the space exactly as it sits and pay for every improvement yourself. Warm shell means the landlord delivers core systems — typically HVAC, basic electrical, and a finished envelope — but interior buildout is on you. Turnkey means the landlord builds the space to your agreed specs and hands you the keys ready to operate.

Which delivery method is cheapest up front? As-is almost always has the lowest face rent, because you're absorbing the construction risk and cost. But "cheapest quote" and "cheapest deal" aren't the same thing — a low as-is rate can cost more once you fund the buildout yourself. Compare total cost over the lease term, not the headline rate.

Where does the tenant improvement (TI) allowance fit in? TI is the dollar amount a landlord contributes toward your buildout, and it shows up most in warm shell and turnkey deals. A larger TI allowance can make a higher rent worth it if it offsets construction you'd otherwise self-fund. Always pin down whether unused TI is forfeited, amortized into rent, or paid back to you.

Is turnkey worth the higher rent? It can be, if you lack the capital or appetite to manage construction and want a predictable move-in date. You're trading higher ongoing rent for the landlord carrying the build risk and cost. For tenants with thin reserves or no construction experience, that trade often pays off over the term.

How does NNN affect which option saves the most? NNN means you pay your share of taxes, insurance, and maintenance on top of base rent, regardless of delivery method. It doesn't change the buildout math directly, but it affects your true monthly cost, so fold it into any comparison. A low base rent with heavy NNN charges can erase the savings of an as-is deal.

What's the most common mistake when choosing a delivery method? Picking by which quote looks cheapest instead of by who controls the construction risk and cost. Tenants underestimate buildout expenses, overruns, and timeline delays they take on with as-is or warm shell. Decide based on your capital, your tolerance for managing a project, and the total cost across the lease term.

Sources

• https://www.cbre.com/insights
• https://www.us.jll.com/en/trends-and-insights
• https://www.cushmanwakefield.com/en/united-states/insights
• https://www.naiop.org/research-and-publications
• https://www.boma.org/
• https://www.irem.org/
• https://www.sba.gov/business-guide/manage-your-business/buy-lease-commercial-space
• https://www.ada.gov/

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