How should HVAC costs be split between office and warehouse in a flex space lease?

Office portions of flex buildings require full heating and cooling year-round at comfort standards (68–76°F). Warehouse portions typically require minimal or no air conditioning, only basic heating for code compliance and worker safety. HVAC costs should be split proportionally based on conditioned square footage and system capacity, not total building square footage. Request the HVAC system design documentation to verify how capacity is allocated between the two zones.

Who is responsible for loading dock door replacement in a flex lease?

Loading dock overhead doors and dock levelers are building infrastructure, capital equipment with a useful life of 10–20 years. Their replacement is a capital expenditure that belongs to the landlord in most NNN and modified gross flex leases unless the lease explicitly assigns dock door replacement to the tenant. Routine maintenance (lubrication, spring adjustment, minor repairs) is typically tenant responsibility. Challenge any invoice that describes a full door or leveler replacement as "maintenance."

How should HVAC costs be split between office and warehouse in a flex space lease?

Office portions of flex buildings require full heating and cooling year-round at comfort standards (68–76°F). Warehouse portions typically require minimal or no air conditioning, only basic heating for code compliance and worker safety. HVAC costs should be split proportionally based on conditioned square footage and system capacity, not total building square footage. Request the HVAC system design documentation to verify how capacity is allocated between the two zones.

Who is responsible for loading dock door replacement in a flex lease?

Loading dock overhead doors and dock levelers are building infrastructure, capital equipment with a useful life of 10–20 years. Their replacement is a capital expenditure that belongs to the landlord in most NNN and modified gross flex leases unless the lease explicitly assigns dock door replacement to the tenant. Routine maintenance (lubrication, spring adjustment, minor repairs) is typically tenant responsibility. Challenge any invoice that describes a full door or leveler replacement as "maintenance."

Flex Space Lease CAM Audit Guide

Tenants in Flex Space Lease structures face specific overcharge risks tied to how expenses are allocated and billed. CamAudit runs 12 forensic detection rules on your reconciliation statement to identify every recoverable dollar.

Formal Definition

A lease for "flex" industrial-office properties, buildings designed to accommodate a mix of office (typically 20–30% of the square footage) and industrial/warehouse use (70–80%). The lease structure is typically modified gross or NNN, with expense allocation reflecting the property's hybrid nature: the office portion may be subject to different HVAC and utility standards than the warehouse portion.

Expense Pass-Throughs

Varies by lease: modified gross structures typically leave utilities and interior maintenance with the tenant; NNN structures pass all operating expenses. Flex properties often have separate metering for the office and warehouse portions, with different utility consumption profiles. Property taxes and insurance are typically passed through on a pro-rata share basis if multi-tenant.

CAM Calculation & Billing

For multi-tenant flex parks, CAM is calculated identically to standard NNN, monthly estimate based on prior year actuals, annual reconciliation, pro-rata share by GLA. For single-tenant flex, the tenant pays 100% of all operating costs. Roof and structural responsibility varies significantly: some flex leases assign HVAC and dock door replacement to tenants.

Most Common Overcharge

HVAC allocation ambiguity, office HVAC is typically HVAC year-round at standard comfort levels, while warehouse HVAC (if any) is minimal. When a landlord installs a unified HVAC system and charges costs without submetering or allocation, the office tenant can be billed for warehouse climate costs and vice versa. Loading dock door replacement is also commonly mischaracterized as maintenance.

Common Industries

→E-commerce / last-mile logistics
→Light manufacturing with showroom
→Technology companies with lab/testing space
→Biotech / life sciences with wet lab

Audit Focus

Verify HVAC costs are allocated between office and warehouse portions proportionally. Confirm loading dock door replacements are classified as capital expenditures and excluded from maintenance CAM. Review pro-rata share calculations to ensure the denominator includes all flex buildings in the park, not just the occupied ones.

Red Flags to Watch

▶HVAC costs billed at the same rate per square foot for office and warehouse portions
▶Loading dock door or overhead door replacement billed as "door maintenance"
▶Pro-rata denominator excluding vacant flex bays from the park calculation
▶Office tenant billed for heavy warehouse power consumption without separate metering

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Related Resources

ResourcesCAM Audit by Tenant Type ToolsFree CAM Audit Tools GlossaryCAM Glossary ToolsPro-Rata Share Calculator

Frequently asked questions

This page provides general educational information. It is not legal advice and may not reflect the most current law in your state. Consult a licensed attorney for advice specific to your situation.