Two buildings may offer the same floor space, access and location—but very different energy potential.
Commercial property has traditionally been judged by familiar factors:
- Location.
- Floor area.
- Access.
- Parking.
- Loading capacity.
- Tenant demand.
Energy was often treated as an operational expense rather than a defining feature of the property itself.
That distinction is beginning to disappear.
As electricity costs, sustainability requirements and demand for reliable power become more important, a new question may start influencing commercial property decisions:
How energy-ready is the building?
Two Warehouses. Two Very Different Assets.
Imagine two warehouses in the same industrial park.
They have the same floor area.
Similar access.
Comparable office space.
Similar rental potential.
From a traditional property perspective, they may appear almost identical.
But one has:
- A large, unshaded roof with strong solar exposure
- A roof structure capable of supporting a substantial PV system
- Space for inverters and battery storage
- Suitable grid capacity and electrical infrastructure
- Parking that can accommodate future EV charging
- Metering systems capable of measuring and managing energy use
The other does not.
Are these buildings still equally valuable?
Perhaps not.
One property can potentially become an electricity-generating asset with relatively little structural modification.
The other may require roof reinforcement, electrical upgrades, new distribution boards, trenching, transformer work or significant future capital expenditure before it can offer the same capability.
The difference is not simply whether solar panels have already been installed.
It is whether the building is capable of supporting the energy requirements of its future occupants.
Property Value Is Ultimately Connected to Income and Risk
Commercial property is not valued only by what it looks like.
Its value is closely connected to the income it can produce, the costs required to maintain it and the risk associated with that income.
This is where energy begins to matter.
A building that helps tenants reduce electricity costs may be more attractive to occupy.
A property that can provide reliable power may appeal to a broader range of businesses.
A building that requires fewer future energy upgrades may carry less capital expenditure risk for an investor.
And a rooftop solar system can potentially create an additional revenue stream where the landlord sells electricity to tenants, enters into an energy agreement or leases rooftop space to a third-party generator.
Updated RICS valuation guidance specifically recognizes that rooftop renewable-energy systems can affect commercial-property income, operating efficiencies, capital costs, tenant demand and obsolescence risk where those factors are material to the market.
Solar does not automatically increase a property’s value.
But the financial outcomes it creates might.
Lower Occupancy Costs Could Attract Better Tenants
For many commercial tenants, rent is only one part of the cost of occupying a building.
Electricity, backup generation, maintenance, water, security and municipal charges all affect the real cost of the property.
A building offering lower or more predictable energy costs may therefore compete differently from a building that simply offers a lower rental rate.
A tenant operating machinery, refrigeration, warehousing systems, manufacturing equipment or a growing electric-vehicle fleet may place significant value on a property capable of supplying and managing energy efficiently.
This creates an important change in how property may be compared.
The question may no longer be:
What is the rental per square meter?
It may become:
What is the total cost of operating from this building?
That could give energy-efficient and energy-producing properties an advantage in attracting tenants, reducing vacancies and protecting rental income.
South African research already shows a broader connection between green-building performance and commercial-property outcomes. According to the 2024 MSCI South Africa Green Annual Property Index, Green Star-certified prime and A-grade offices recorded lower vacancy rates, higher net operating income per square meter and higher capital values than comparable non-certified offices.
The study reported: