Commercial Water Systems and Lease Obligations

Water interruptions are no longer rare events in Johannesburg. With Johannesburg Water reporting non-revenue water of 44.8% in its 2024/25 audited figures — a sign of systemic pressure on ageing infrastructure — and the city’s reservoir buffer sitting at roughly 27 hours of citywide storage, the question of who keeps the taps running in a commercial building has moved from a footnote to a core lease concern.

Yet most standard commercial leases in South Africa are silent on backup water. They cover rent escalation, maintenance obligations, and sometimes electrical supply, but water continuity is typically left undefined. That silence costs both sides money and creates disputes that could have been avoided with a few clear clauses.

This article is not legal advice. It sets out the practical and technical questions tenants and landlords should be raising — and recommends getting a lease reviewed by a qualified property attorney before signing.

Why Municipal Supply Alone Is Not Enough for Commercial Tenants

A business that depends on continuous water — a restaurant, a medical practice, a hair salon, a commercial laundry — faces direct revenue loss when supply drops. Unlike a residential tenant who can fill a bath as a short-term buffer, commercial operations often cannot queue water-intensive tasks.

Johannesburg’s infrastructure position makes this a real operational risk rather than a theoretical one. Planned maintenance, pipe failures, and pressure drops affect commercial areas as much as residential ones, and the city’s own figures on non-revenue water suggest the network is under sustained stress.

For tenants, the question is: does the lease require the landlord to maintain water supply, or does it simply require the landlord to keep the building connected to the municipal main? Those are very different obligations, and the standard lease usually only promises the latter.

What Leases Typically Say — and What They Leave Out

Most commercial leases in South Africa follow templates that were drafted when municipal services were more reliable. Common clauses:

• Landlord obligation: maintain the building’s internal plumbing in good working order.
• Tenant obligation: not to waste or misuse water; pay municipal accounts (or pay the landlord who pays the municipality, depending on the metering arrangement).
• Force majeure: interruptions caused by the municipality are typically excluded from the landlord’s liability.

What is usually absent:

• Any obligation on either party to install backup storage.
• Ownership of backup systems installed during the lease.
• Cost-sharing formulas for shared infrastructure like jojo tanks or borehole systems.
• What happens to installed equipment at lease-end.

These gaps are not a legal judgement on either party’s good faith — they simply reflect that the templates predate the current supply environment.

The Ownership Question for Installed Backup Systems

This is where disputes most commonly arise. A tenant installs a 5,000-litre tank and a booster pump to keep their business running. The lease ends. Is that equipment a fixture that stays with the building, or is the tenant entitled to remove it?

South African common law generally treats permanently affixed fixtures as part of the immovable property, but the test involves the degree of annexation and the intention of the parties. A tank bolted to a concrete plinth and connected to the building’s main supply line is more likely to be treated as a fixture than a free-standing unit with quick-release fittings.

Without a written clause, both parties face uncertainty. The practical solution is to agree before installation:

Question	Recommended lease clause approach
Who funds the installation?	Name the party and specify any rent adjustment or contribution
Who owns the equipment?	State explicitly: tenant’s movable asset or landlord’s fixture
Who maintains it?	Assign responsibility and define the standard
What happens at lease-end?	Removal, purchase option, or donation to landlord at agreed value

For larger systems — borehole installations, for instance, which typically run R40,000–R150,000 for a complete system in Johannesburg — leaving ownership undefined is a significant financial risk for both sides.

Regulatory Obligations Neither Party Can Contract Away

Regardless of what the lease says, certain obligations sit with the property owner under South African law and Johannesburg Water’s bylaws. These include:

• Ensuring the building’s connection to the municipal supply complies with the city’s standards.
• Any borehole registered and used on the property must comply with registration requirements under the National Water Act; this obligation generally falls on the landowner.
• Drinking water provided to occupants must meet SANS 241 (2024 edition), the South African drinking-water quality standard. If a landlord installs a treatment or storage system and then supplies water to tenants, they take on a quality-of-supply responsibility that a simple municipal connection does not carry.

The Consumer Goods and Services Ombud (CGSO) handles disputes between consumers and service providers, but commercial lease disputes typically fall outside its jurisdiction and into the domain of the Rental Housing Tribunal or the courts — another reason to resolve ambiguities in the lease itself rather than rely on external resolution.

For a broader look at how backup systems and responsibilities are structured for office and commercial buildings, the overview of commercial water solutions covers system types and cost ranges in more detail.

If you're responsible for water continuity in a commercial property, getting independent installer quotes helps you understand real costs before lease negotiations. Compare 3 free quotes — vetted installers, no obligation.

Practical Checklist Before Signing or Renewing a Commercial Lease

Neither party should sign a commercial lease in Johannesburg’s current water environment without working through the following:

For tenants:

• Ask whether the building has backup water storage, and what its capacity is relative to your daily demand.
• Request a clause confirming minimum water availability or a rent reduction mechanism if supply falls below a defined threshold.
• If you intend to install your own backup system, negotiate the ownership and removal clause before signing.
• Check whether your business interruption insurance covers municipal water outages — many policies do not without an endorsement.

For landlords:

• Audit the building’s current storage buffer and consider whether it is adequate for your tenant mix.
• Clarify in new leases who is responsible for backup system maintenance and at what standard.
• If you install shared infrastructure, decide whether to recover costs through service charges and document this clearly.
• Consult a property attorney to update template leases to reflect current municipal supply realities.

The article on water security for office buildings provides practical guidance on system sizing and the types of backup infrastructure most commonly used in Johannesburg commercial properties — useful reading when preparing for lease negotiations.

Understanding system costs before you negotiate gives you a realistic position at the table. Get free installer quotes — no obligation, vetted Johannesburg suppliers.

Water Quality and Liability When Landlords Supply Stored Water

One underappreciated risk: once a landlord moves from simply connecting to the municipal main to actively storing and re-supplying water through tanks or a borehole, they become a water supplier in a practical sense. SANS 241 (2024 edition) sets the national quality standard for drinking water. If tenants use stored water for drinking, food preparation, or patient care, and quality is inadequate, liability questions become serious.

The responsible approach is to test stored water regularly, display the results, and specify in the lease what quality standard the landlord undertakes to maintain — or, equally clearly, that stored water is for non-potable use only and that potable supply remains the tenant’s responsibility.

“Test first, treat second” applies here: a basic potability test before any stored or borehole water goes into service, and regular follow-up testing thereafter. The cost of testing is modest compared to the liability exposure of supplying untested water in a commercial premises.

The Bigger Picture

Johannesburg’s water infrastructure position means that commercial tenants and landlords are, in effect, co-managing a supply risk that was once entirely the municipality’s problem. Leases that were adequate ten years ago do not reflect that changed reality.

The good news is that the technical solutions exist — storage tanks, booster pumps, and borehole systems are all well-established in the local market — and the costs, while material, are quantifiable. Backup tank-and-pump systems typically run R20,000–R40,000 for smaller installations, with whole-building examples typically around R55,000; larger borehole systems typically run R60,000–R100,000 for most Johannesburg installations, though costs vary and should be confirmed via quotes.

What lags behind is the legal documentation. Updating lease templates to address water continuity, ownership of backup equipment, quality obligations, and cost recovery is not a large legal exercise — but it is one that protects both sides from disputes that are becoming increasingly common as supply pressures persist.