You found the perfect office space. The location is right, the floor plate works for your layout, the rent is within budget, and the landlord has been accommodating on the lease terms. You sign, you engage your interior designer, and three weeks into the renovation your contractor calls to say the existing electrical supply is not enough for what you need.
Now you are looking at a supply upgrade that could take weeks, cost a small fortune, and push your move-in date into the next quarter. This happens far more often than it should, and the frustrating part is that a simple assessment before signing the lease could have caught it.
What the Lease Actually Tells You
Most commercial leases will reference the electrical supply allocated to the tenanted unit. It might be described in terms of the incoming supply capacity, the type of supply, or simply a reference to the existing distribution board (DB) that comes with the unit. On the surface, this seems like useful information. You know what you are getting, right?
Not really. The lease tells you what the building provides to your unit. It does not tell you whether that provision is sufficient for what you plan to do with the space. And that gap – between what is provided and what is needed – is where things get expensive.
Think about it this way. A unit that previously housed a small consultancy with a dozen desks and a pantry has a very different electrical profile from one that needs to support a tech company with a server room, a large AV-equipped meeting room, a staff kitchen with commercial-grade appliances, and charging stations throughout the workspace.
The supply that was perfectly adequate for the previous tenant may be nowhere near enough for yours. But the lease does not care about your plans. It describes the existing provision, and the rest is your problem to figure out.
The Difference Between Supply and Demand
Tenants often overlook the core issue: their fit-out’s electrical demand differs from the unit’s incoming supply. These two numbers need to align, and in most commercial lease situations, nobody checks whether they do until the renovation is already underway.
Your incoming supply is essentially the capacity allocated to your unit by the building’s main electrical infrastructure. Your demand is the total load created by everything you plan to plug in, switch on, and run simultaneously – lighting, air conditioning, power outlets, server racks, pantry equipment, AV systems, and anything else your business needs. When demand exceeds supply, things do not work the way you need them to.
The tricky part is that demand is not just the sum of everything at full power. It involves understanding which loads are continuous, which are intermittent, which create high inrush current on startup, and how different systems interact.
A server room that runs continuously has a very different load profile from a kitchen where the oven, microwave, and kettle might all be on at the same time during the lunch rush. This is why a proper load assessment matters – not a back-of-napkin calculation, but a structured review of what you actually need.
For commercial tenants in Singapore, companies like Mr Electrician SG conduct these assessments as a standard part of their pre-fitout electrical scope, which means supply issues get flagged before a single cable is pulled.
Honestly, this is one of those things where spending a relatively small amount upfront on a proper assessment saves you from discovering the problem at the worst possible time.
Why Tenants Discover This Too Late
There are a few reasons why this particular problem keeps catching people out in the commercial leasing market. The first is that most tenants are not electrical engineers, and they reasonably assume that a commercial office unit comes with enough power for a commercial office. That is a fair assumption for a basic setup, but “basic” might not describe what your business needs.
The second reason is timing. In a typical lease negotiation, the focus is on rent, tenure, renovation period, reinstatement clauses, and maybe car park allocation. Electrical capacity does not make the conversation because it feels like a technical detail that can be sorted out later.
By the time someone actually looks at the electrical supply – usually the renovation contractor during the fitout – the lease is signed, the renovation period clock is ticking, and there is no easy way to pause.
The third reason is that landlords are not obligated to tell you whether the existing supply meets your needs. They provide what the building infrastructure supports for that unit, and it is on the tenant to assess whether it is adequate. This is not a criticism of landlords – it is simply how commercial leasing works. But it means the due diligence falls entirely on you, and most tenants do not know to ask.
How Does It End?
So, what happens when you discover the shortfall mid-renovation? The renovation contractor stops the electrical work because there is no point wiring a DB that cannot handle the load. You engage someone to assess the upgrade requirements.
An application may need to go to the building management and potentially to the relevant authorities depending on the scope. The upgrade gets scheduled, which has its own lead time.
And your renovation period, which the lease defines in weeks or months, starts burning while you wait. Ever watched rent accrue on a space you cannot occupy because of an infrastructure issue nobody flagged? It is not a pleasant experience.
What a Load Study Actually Involves
A load study – sometimes called a load assessment or electrical capacity study – is the process of mapping out every electrical load in your planned fitout and comparing the total demand against the available supply. It sounds simple, and conceptually it is. But doing it properly requires someone who understands both the technical side and the practical reality of how commercial spaces use power.
The assessment starts with your fitout plans. What equipment are you bringing in? How is the space being used? Where are the heavy loads concentrated? What runs continuously versus intermittently? From there, the assessor calculates the total connected load, applies the appropriate diversity factors – because not everything runs at full capacity simultaneously – and arrives at a demand figure that represents your realistic power requirement.
That figure gets compared against the incoming supply. If the supply exceeds the demand with reasonable headroom, you are fine. If it does not, you need to understand your options before the renovation goes any further.
Getting this done before you commit to a fitout design means any supply issues surface early enough to address without blowing up your timeline.
What Happens When You Need More Power
If the load study reveals that your incoming supply is not enough, you have a few paths forward. None of them are instant, and all of them cost money, but some are significantly more disruptive than others depending on when you catch the problem.
The most common scenario is requesting a supply upgrade through the building management. Most commercial buildings allocate main switchboard capacity to individual units and may reallocate spare capacity to yours.
This is the best-case scenario because it keeps the upgrade within the building’s existing infrastructure. The process involves the building’s facilities team, potentially their electrical consultant, and some paperwork – but it is usually the fastest route.
If the building does not have spare capacity, or if your needs exceed what the building can provide, you are looking at a more involved process. This might require application to the relevant authorities, infrastructure work beyond your tenanted unit, and coordination between your electrical contractor, the building management, and potentially the power utility. The timeline for this kind of upgrade is not measured in days. It can stretch across weeks or even longer depending on the scope and the approvals required.
The key point is that either scenario is manageable if you know about it before the renovation starts. It becomes a planning input rather than a crisis. But if you discover it mid-fitout, you are managing a crisis while paying rent on a space you cannot use.
The Landlord Conversation You Should Have Before Signing
Before you sign a commercial lease – or at least before you start the renovation – there is a conversation worth having with the building management about the electrical provision for your unit. You want to understand what is coming in, what the building’s capacity situation looks like, and what the process would be if you needed more.
Landlords and building managers deal with this regularly, and most are happy to provide the information if you ask. The problem is that most tenants do not ask because they do not know it matters. Sharing a basic understanding of your electrical needs helps facilities teams quickly determine if the existing provision suffices.
By engaging an EMA LEW from mrelectrician.sg, you’ll get professional help to review your building’s electrical documentation and compare it against your fit-out requirements. The guessing game becomes a clear assessment. And the cost of this pre-lease check is trivial compared to the cost of a mid-renovation supply upgrade.
Planning for Growth, Not Just Opening Day
There is one more angle that is worth considering, and it is one that most tenants completely overlook: your electrical needs on day one is probably not your electrical needs in year three.
Businesses grow. You add people, which means more desks, more monitors, more phone chargers, and more demand on the air conditioning. You add equipment, maybe a larger server setup, maybe a video production studio, maybe a staff gym with treadmills. Each change increases electrical demand; if your initial installation lacks headroom, every growth step requires a new electrical project.
The smart approach is to factor growth into your initial load assessment. Not wild speculation about what you might need in a decade, but a realistic view of your trajectory over the lease term. If your business plan calls for doubling headcount in two years, your electrical design should accommodate that from the start. Designing for a larger load upfront costs less than upgrading a fully operational office later.
Your office lease gives you a space to operate your business. But the electrical capacity that comes with that space is not a guaranteed match for what your business needs. Treat the electrical assessment as part of your due diligence, right alongside the lease review and the fit-out design. It is a straightforward step that prevents one of the most avoidable and expensive surprises in commercial tenancy.
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