Tenant Building Considerations (Triple-Net Leases)

Quick Answer: Commercial solar on triple-net lease buildings has a fundamental problem: the tenant pays utilities and therefore captures the electricity savings, while the owner pays the capex. Without restructuring the lease, the owner's financial case depends almost entirely on tax benefits and resale value, not operating savings. Solutions include green lease amendments, solar service agreements, waiting for lease renewal, or PPA structures that bill the tenant directly. Property managers should treat the lease structure question as the first decision point, ahead of system sizing.

A 200 kW solar array on a triple-net warehouse can save the tenant $40,000 per year while costing the owner $400,000 in capex. That math doesn't work for the owner unless the lease structure is addressed. This article walks through the lease structures that affect commercial solar economics, how to restructure for solar, and the workarounds when restructuring isn't feasible.

At a Glance

Quick Facts:

• Triple-net lease structure: Tenant pays property tax, insurance, and operating costs (including utilities)

• Default solar outcome: Tenant captures savings, owner pays capex

• Green lease prevalence: Increasingly common in newer commercial leases

• Solar service agreement model: Owner bills tenant for solar electricity at sub-utility rate

• PPA-to-tenant structure: Third party bills tenant directly, owner gets building value uplift

• Lease renewal opportunity: Cleanest moment to restructure for solar

How Triple-Net Leases Affect Solar Economics

A standard triple-net lease (NNN) makes the tenant responsible for three categories beyond base rent: property tax, building insurance, and operating costs. Utilities typically fall under operating costs.

When solar is installed in this structure:

• Owner pays the solar capex and captures tax benefits

• Tenant's utility bill decreases due to solar production

• Owner sees no operating savings; tenant sees all of them

• Building value may increase, benefiting owner on resale

• Net effect for owner: tax benefits plus resale uplift, minus capex

This math can still work in some cases (long hold, strong ITC capture, premium-property value uplift), but it's significantly weaker than owner-occupied solar economics.

The mistake is installing solar on a triple-net lease building without addressing the structure, then discovering the financial case looks much weaker than the proposal suggested.

The Five Approaches to Tenant Building Solar

Five paths address the structural problem.

1. Green lease amendment. Modify the existing lease to include a "green rent" component that captures a share of solar savings back to the owner. Tenant still benefits (lower net cost than utility rate); owner recovers capex. Common in newer commercial leases; can sometimes be negotiated mid-term.

2. Solar service agreement. Owner installs the array as a building service. Tenant pays the owner for solar electricity at a rate below the prevailing utility rate. Owner recovers capex plus margin; tenant saves on electricity. Structured as separate from the base lease.

3. Lease renewal restructure. Wait for lease turnover. New lease incorporates solar as a building feature with appropriate rent structure. Cleanest restructure but timing-dependent.

4. Third-party PPA to tenant. A PPA provider installs the array and bills the tenant directly at a sub-utility rate. Owner pays no capex and captures building value uplift. Tenant saves on electricity. PPA provider captures incentives and earns return.

5. Wait for owner-occupied transition. If the building is likely to become owner-occupied within 5 years (current tenant lease ending, owner planning to occupy), defer the solar project until the transition.

Green Lease Amendments

The green lease approach has become more common as commercial sustainability has matured.

Typical structure 

Lease amendment adds a "sustainability rent" line item that captures a portion of demonstrated utility savings from owner-funded sustainability investments. Often expressed as a percentage of savings (e.g., 50% to 70% of solar savings flow back to owner as green rent).

Tenant motivation 

Tenant still saves money (the portion not flowing back to owner is net savings). Tenant gains sustainability credentials. Tenant often gets first refusal on remaining lease term at the time of amendment.

Owner motivation 

Recovers capex through the green rent stream. Building gains long-term sustainability infrastructure. Solar costs are partially amortized through rent rather than entirely from operating savings.

Documentation 

Requires baseline utility data to demonstrate savings against, ongoing measurement and reporting, and clear scope definition for what counts as solar savings.

For long-term tenants in stable lease relationships, green lease amendments are often the cleanest solution.

Solar Service Agreement Approach

A solar service agreement treats solar electricity as a building service distinct from base rent.

Typical structure

Owner installs and operates the solar array. Separate service agreement with tenant covers solar electricity supply. Tenant pays for actual kWh consumed from solar at a contracted rate (typically 10% to 25% below utility rates).

Capex recovery 

The contracted rate is set to recover capex over the agreement term while providing tenant savings versus the utility rate. Term often runs 10 to 20 years.

Service responsibilities 

Owner maintains the array. Performance shortfalls flow back to the tenant through rate adjustments or service credits.

Lease interaction 

Service agreement runs alongside the base lease. Tenant changes or lease terminations require service agreement transition provisions.

Effective for buildings where the owner wants direct involvement in the solar economics rather than transferring to a third-party PPA provider.

PPA Structures for Tenant Buildings

PPA arrangements can sometimes be structured to bill the tenant directly, bypassing the owner's financial flow entirely.

Typical structure 

Third-party PPA provider installs the array on the owner's roof. Tenant signs the PPA agreement and pays the PPA provider for solar electricity. Owner provides roof access and gets building value uplift but takes no capex and no operating flow.

Owner benefits

Zero capex, zero operational involvement, building value uplift, ESG positioning, no incentive capture concerns.

Owner concerns

Long-term roof access commitment to PPA provider. Lease assignment provisions when tenants change. Removal cost responsibility at PPA end.

Tenant benefits 

Direct electricity savings vs. utility. No long-term capex commitment from tenant either (PPA absorbs all of it). Sustainability positioning.

Tenant concerns 

Long-term commitment to a third-party provider. Service quality and dispute resolution.

This structure works well for owners who can't easily restructure the lease but want the building to have solar for ESG, market positioning, or future buyer appeal.

Multi-Tenant Buildings

Buildings with multiple tenants have additional complexity.

Common-area solar only 

Owner installs solar sized to common-area load (lobby, parking, HVAC). Owner pays utilities for common areas, so owner captures common-area solar savings directly. Simpler structure but limits system size.

Building-wide solar with allocation

Solar production allocated proportionally to tenants based on consumption. Requires sophisticated metering and allocation methodology. More complex but scales to building-wide system size.

Per-tenant solar

Each tenant has an individual solar service agreement matching their lease structure. Most complex but most flexible.

Future tenant planning 

Vacancy periods, tenant turnover, and lease renewals all affect long-term solar economics in multi-tenant buildings.

Multi-tenant buildings typically benefit from more sophisticated structuring than single-tenant buildings. The complexity is justified by the larger scale and longer lifecycle of multi-tenant commercial properties.

How Property Managers Should Approach Tenant Solar

For property managers and asset managers handling solar evaluation on tenant buildings, tenant building considerations should be part of the planning process from the start. A recommended sequence:

1. Audit lease structures across the portfolio. Identify which buildings are triple-net, modified net, gross lease, or owner-occupied. Each structure has different solar implications.

2. Identify lease renewal timing. Buildings with leases renewing within 24 months are the easiest restructuring opportunities.

3. Engage tenants early. Tenant cooperation makes restructuring straightforward; tenant

resistance can make it expensive. Early conversation reveals which buildings are good candidates.

4. Model multiple structures. Direct purchase with green lease amendment, solar service agreement, and PPA-to-tenant all have different financial profiles. Modelling all three for the same building identifies the right approach.

5. Sequence the easiest buildings first. Single-tenant buildings with cooperative tenants and short lease renewals are the easiest projects. Multi-tenant buildings with complex leases are typically last in the sequence.

Frequently Asked Questions

Can I install solar on a triple-net lease building?

Yes, but the lease structure needs to be addressed. Without restructuring, the tenant captures the electricity savings while you pay the capex. Solutions include green lease amendments, solar service agreements, or third-party PPA structures that bill the tenant directly.

What's a green lease amendment?

A modification to an existing commercial lease that adds a sustainability rent component capturing a portion of utility savings from owner-funded sustainability investments. The tenant still benefits from lower net costs; the owner recovers capex through the rent flow. Increasingly common in newer commercial leases.

Will my tenant agree to a solar restructure?

Often yes, especially if the structure preserves tenant savings while sharing some benefit with the owner. Tenants gain sustainability positioning and lower net utility costs. Pure capex transfer (tenant pays nothing additional) is less likely; shared-benefit structures are more workable.

Can I just install solar and let the tenant benefit?

You can, but the financial case for you will depend almost entirely on tax benefits and resale value uplift, not operating savings. For some owners this works; for most, the math is better with restructuring.

What happens to the solar arrangement when the tenant changes?

It depends on the structure. Green lease amendments typically transfer to new tenants with the building. Solar service agreements can be assigned or terminated with the tenant's departure. PPA-to-tenant structures usually require new agreements with replacement tenants.

About Superior Roofing: Superior Roofing Ltd. provides Calgary commercial solar installation throughout the city, specializing in tenant-building project structuring, lease-aware system sizing, and combined roofing and solar capability delivered by Red Seal Journeymen for property owners and asset managers requiring trusted, structurally appropriate projects.

Ready to evaluate commercial solar on your Calgary tenant building? Superior Roofing helps property owners and asset managers think through lease structure implications, model multiple economic scenarios, and execute projects that work for both owner and tenant, backed by 25+ years of local commercial experience.

Contact us today at 403-464-3812 to book your free commercial solar feasibility consultation.

Disclaimer: Roofing involves safety risks; consult licensed professionals for work beyond ground-level visual checks. Costs and specifications provided are estimates based on typical Calgary market conditions and may vary based on specific project requirements and current material pricing.