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Flex Industrial Office Ratio Calculator

Flex industrial has office buildout mixed with warehouse — ratio drives blended rent.

Total sqft

Office % of total

Warehouse rent / sqft

Office rent / sqft

TI / sqft office

Blended rent / sqft

$15.25

Total TI exposure

$225,000

Total annual rent

$305,000

How the math works

Blended rent = (warehouse sqft × WH rate + office sqft × office rate) / total.

5,000 × $28 + 15,000 × $11 = $305,000 / 20,000 = $15.25 blended. TI = 5,000 × $45 = $225k.

Editorial noteMaintained by EveryCalc - Reviewed June 2026

EveryCalc calculators are designed for fast, practical estimates with transparent inputs and no required account. We use plain formulas, visible assumptions, and related tools so visitors can check the result from more than one angle.

Results are informational only. For financial, tax, legal, medical, construction, or other high-impact decisions, verify the output against primary sources or a qualified professional.

Learn more about our review process on the EveryCalc methodology page.

How this calculator works

What this page estimates

This Flex Industrial Office Ratio Calculator is built to give a quick, browser-based estimate for flex industrial office ratio. Flex industrial has office buildout mixed with warehouse — ratio drives blended rent. The inputs stay on the page during normal use, and the result should be treated as an estimate for planning, comparison, or education rather than professional advice.

Calculation approach

The calculator applies the standard relationship implied by the inputs, then formats the answer so it can be checked and reused. For finance tools, the most important step is using consistent units, rates, time periods, and assumptions before comparing the result with another calculator or outside quote.

Example workflow

For example, start with a realistic value you already know, change one input at a time, and watch how the answer moves. That makes it easier to tell whether the result is being driven by the main amount, the rate, the time period, or a unit conversion.

Practical checks

Use current, real-world numbers when the result affects money, health, tax, or legal decisions.
Run a low, base, and high case when the inputs are estimates.
Check the related calculators below when the next decision depends on a different assumption.

How to interpret the flex industrial office ratio result

Best use

Use the result as a planning number for comparing payments, rates, returns, tax reserves, or cash-flow choices before you request a quote or make a commitment.

Cross-check

Compare the answer with the contract, lender estimate, tax form, brokerage statement, payroll record, or invoice that will control the real-world outcome.

Watch for

Do not rely on a single optimistic rate, return, or fee assumption. Money pages work best when you run low, base, and high cases and keep professional advice separate from the estimate.

This page belongs to the Finance calculator library, so the answer should be read in the context of the decision you are modeling rather than as a universal rule.

Before relying on this flex industrial office ratio estimate

Most calculator mistakes come from the inputs, not the arithmetic. Use this short audit before you reuse the answer in a spreadsheet, quote, application, or important conversation.

Confirm source numbers

Match balances, rates, fees, taxes, income, and payment dates against the lender quote, payroll record, tax form, statement, invoice, or contract.

Separate cash flow from total cost

A lower monthly payment can still cost more over time if fees, interest, taxes, or a longer term are hidden in the structure.

Run conservative cases

Test at least one higher-cost or lower-return case before using the output for a purchase, refinance, investment, loan, or tax decision.

Rerun this page when the rate, price, term, fee, tax rule, income, expense, or expected holding period changes.

How to Use

Enter total sqft.
Enter office % of total.
Enter warehouse rent per sqft.
Enter office rent per sqft.
Enter TI per sqft office.
Read blended rent and TI exposure.

Frequently Asked Questions

Flex industrial defined?

Flex industrial: single-tenant or multi-tenant building with mix of office (administrative, sales, design) + warehouse (storage, light assembly, showroom). Office typically 15-35% of sqft. Contrast with: pure warehouse (<10% office), light industrial manufacturing (40-60% office), office/R&D (60-80% office). Flex tenants: service contractors, HVAC, plumbing, landscaping, electrical contractors, light manufacturers, distributors.

Typical office ratios?

Light industrial/distribution tenant: 10-20% office. Manufacturing with engineering/design: 20-35% office. Service contractor (plumbing, HVAC): 25-40% office (admin/sales heavy). Showroom/retail-adjacent: 35-55% office. Tech-industrial (prototyping, light mfg): 40-60% office. Match office % to tenant — oversized office = stranded capex; undersized = tenant rejects space.

Rent differentials?

Office portion: $20-40/sqft depending on finish quality. Warehouse: $6-14/sqft depending on clear height. Blended flex rent: $12-22/sqft. Office-heavy flex (30-40% office): $18-28/sqft. Pure warehouse: $8-12/sqft. Spec office finishes: basic (drop ceiling, standard HVAC): $25-40/sqft build. Premium (exposed ceiling, upgraded HVAC, executive): $40-80/sqft build.

TI amortization?

Office TI in flex: $25-75/sqft. On 5,000 sqft office × $40 TI = $200k. Amortize over 7-year lease at 8% = $3,200/mo = $7.68/sqft/yr premium. Tenant effective office rent: $35 + $7.68 = $42.68 (vs advertised $35 rate). TI required for second-gen tenants who don't fit prior layout — often 30-50% of prior TI. Careful planning: modular office design enables 2-3 tenant cycles with minimal TI.