Thermo Compliance is a division of Thermo Group that specialises in issuing Plumbing Certificate of Compliance
Plumbing Installation Certificate of Compliance (Water By-law Certificate) in Cape Town
If you are buying or selling a property within the City of Cape Town, a Water Installation Certificate of Compliance (Water By-law Certificate) is a legal requirement before the property can be transferred. In accordance with the City of Cape Town Water By-law, a valid certificate must be issued for every transfer to confirm that the property’s water installation complies with the applicable municipal regulations.
At Thermo Compliance, a division of Thermo Group, we provide professional Water Installation Certificate of Compliance inspections for residential and commercial properties across Cape Town. Our qualified inspectors conduct thorough assessments to ensure your property’s water installation meets the requirements of the City’s by-law, helping to avoid delays during the transfer process.
What Is a Water Installation Certificate?
A Water Installation Certificate confirms that the property’s potable water installation complies with the City of Cape Town’s Water By-law requirements. It is important to note that this certificate is not the same as a full plumbing certificate and does not cover every aspect of the plumbing system.
The certificate focuses specifically on municipal water compliance and is required each time ownership of a property changes within the City of Cape Town.
What We Inspect
During our inspection, we assess key components of the water installation, including:
- Visible water supply pipes and fittings
- Water leaks that result in the loss of potable water
- Geyser installations and required safety components
- Pressure control valves and vacuum breakers
- Cross-connections between potable and non-potable water systems
- Stormwater connections to ensure they do not discharge into the sewer system
- Other items required under the City of Cape Town Water By-law
If any non-compliant items are identified, we provide a detailed report and can arrange the necessary repairs before issuing the Water Installation Certificate of Compliance.
Water Installation Certificate vs Plumbing Certificate
Many people assume these certificates are the same, but they serve different purposes.
A Water Installation Certificate of Compliance:
- Is issued in accordance with the City of Cape Town Water By-law
- Applies specifically to property transfers within the City of Cape Town
- Covers the potable water installation only
- Identifies leaks that result in the loss of drinking water
- Includes checks on required water-related safety components
- Verifies that stormwater is not incorrectly connected to the sewer system
- Must be obtained every time the property is transferred
A Plumbing Certificate of Compliance, on the other hand:
- Covers the entire plumbing installation
- Includes wastewater and sewer systems
- Assesses waste traps, drainage systems, and sewer connections
- Identifies faults such as damaged sanitary fittings, leaking waste pipes, and defective plumbing components
- Ensures compliance with the applicable plumbing standards and regulations rather than only the municipal water by-law
Fast and Reliable Water By-law Inspections
Property transfers often operate under strict deadlines, and delays in obtaining a Water Installation Certificate can hold up the registration process. Thermo Compliance provides prompt inspections, professional reporting, and efficient remedial services to help ensure your property transfer proceeds without unnecessary complications. We issue Cape compliance certificates for electrical, plumbing, gas, electric fence, beetle and solar inspections.
Areas In Cape Town We Service
Compliance Certificate Pricing
Transparent, upfront pricing for every Certificate of Compliance we issue in Cape Town. Select your details below for an instant estimate, or scroll down and book your inspection directly. Booking more than one certificate for the same property? Save R50 on every additional certificate.
| Certificate | House — Cash Sale | Flat / Sectional — Cash Sale | House — Transfer | Flat / Sectional — Transfer |
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Prices correct as of 2026 and exclude any remedial work found to be required. A final quote is confirmed once your inspection is booked. Multiple certificates booked together for one property: R50 off each certificate after the first.
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Plumbing COC Cape Town: the short answers
What is a plumbing COC? A plumbing certificate of compliance confirms that a property's water installation (geyser, pipes, valves and fixtures) complies with the City of Cape Town Water By-law. It is required when a property changes ownership. Thermo Group has been qualified from 2007.
How much does it cost? Thermo Group plumbing COCs in Cape Town start from R550, with R50 off each extra certificate. Repairs, if any faults are found, are quoted separately.
Who pays? The seller usually arranges and pays, unless the sale agreement says otherwise.
How long does it take? Most certificates are issued within a few working days, sooner if no remedial work is needed.
How do I book? Use the instant estimate above, or call 021 203 5337 or 082 302 0683. We call back the same day.
Plumbing COC Cape Town: quick answers
What is a plumbing (water) COC in Cape Town?
A plumbing COC, also called a water certificate of compliance, confirms that the water installation on your property (pipes, geyser, valves and fixtures) has been inspected and meets the City of Cape Town requirements. The City requires one when a property is transferred.
How much does a plumbing COC cost in Cape Town?
With Thermo Group, a plumbing (water) COC starts from R550 for a house and R480 for a flat on a cash sale, and from R680 for a house and R550 for a flat when the sale goes through transfer. Each extra certificate booked for the same property is R50 less. Prices exclude any remedial work found to be needed. Use the instant estimate above for your exact price.
Do I need a plumbing COC to sell my house?
Yes, most sellers in Cape Town need a plumbing (water) certificate for the transfer. Call us and we will tell you which certificates apply to your property.
How do I book a plumbing COC inspection in Cape Town?
Get your instant estimate above and fill in your details, or call Thermo Compliance on 021 203 5337 or 082 302 0683. Our office will call you back and arrange your inspection. Estate agents and attorneys can log in here to book faster.
Is a plumbing certificate required to sell a property in Cape Town?
Yes. The City of Cape Town Water By-law requires a water installation certificate of compliance when a property is sold or transferred.
What does the plumbing inspection cover?
The inspection checks the water installation, including the geyser, pipework, valves, taps and fixtures, and looks for leaks.
What happens if the inspector finds faults?
If something does not pass, the faults have to be put right before the certificate can be issued. We quote the repair work separately, and once the work is done the certificate can be issued.
Need other certificates too?
See all certificate types and prices on our Compliance Certificates Cape Town page.
Plumbing certificate of compliance in Cape Town: the City process, form and cost
In Cape Town, a Certificate of Compliance (COC) of the water installation must be submitted to the City before a property can be transferred to a new owner. Here is how it works, who does what, and what it costs with Thermo Compliance, a division of Thermo Group.
Process details below follow the City of Cape Town page Submit a certificate of compliance of water installation on transfer of ownership.
How the plumbing COC works in Cape Town, step by step
- The seller books the inspection. Use the instant estimate on this page, or call 021 203 5337 or 082 302 0683.
- The water installation is inspected. We check it against the City checklist and give you a report. If faults are found, repairs are quoted separately.
- The certificate is completed and signed once the installation complies.
- Your conveyancing attorney submits it. The City says the attorney emails the completed certificate to the City before transfer.
- The City may check. A City water inspector inspects selected properties and takes any non-compliance up directly with the plumber.
What the City water COC confirms
- There are no water installation defects relevant to the checklist at the time the certificate is issued.
- The water meter is registering water consumption.
- There are no stormwater discharges into the sewer system.
- There are no cross-connections between drinking water and any greywater, recycled water or ground-water systems.
- The water installation, for the items on the checklist, conforms to the national building regulations and the City water by-laws.
The City notes the certificate cannot be used as a quality control document for anything other than what is listed on the checklist.
Plumbing certificate of compliance form (PDF)
The City form is called the Certificate of Compliance of Water Installation on Transfer of Ownership. It is the checklist the plumber completes and signs, so you do not need to fill it in yourself. The City publishes the form on its website, and we complete it for you when we inspect your property.
How much does a plumbing certificate of compliance cost in Cape Town?
Thermo Group plumbing COCs in Cape Town start from R550 for a house and R480 for a flat on a cash sale, and R680 for a house and R550 for a flat on a transfer. You get R50 off each extra certificate, so booking plumbing with electrical, gas or beetle saves money. Repairs, if any faults are found, are quoted separately. See the full COC price list for Cape Town (2026).
Properties outside the City of Cape Town
The process above is the City of Cape Town process. Other municipalities have their own rules, so if your property is outside the City, ask your conveyancer what applies before you book.
Selling and need other certificates too?
We can inspect for several certificates in one booking: electrical, gas, beetle and electric fence. See every type on our Cape Town compliance certificates page.
More plumbing certificate questions
Where can I get the plumbing certificate of compliance form (PDF) for Cape Town?
The City of Cape Town form is called the Certificate of Compliance of Water Installation on Transfer of Ownership. It is the checklist the plumber completes and signs after the inspection, so you do not need to fill it in yourself. The City publishes the form on its website, and we complete it for you when we inspect your property.
Who submits the plumbing certificate to the City of Cape Town?
According to the City of Cape Town, the completed certificate is submitted by the conveyancing attorney by email. The plumber inspects and signs the certificate, and your attorney sends it to the City before transfer.
Does the City check plumbing certificates after they are issued?
The City says a water inspector inspects selected properties to confirm compliance and takes any non-compliance up directly with the plumber. We inspect against the City checklist and sort out any faults before the certificate is signed.
Need a compliance certificate in Cape Town?
Electrical, plumbing, gas, fence and beetle certificates. Same-day call-back, no obligation. Qualified from 2007.
Why Choose Thermo Compliance
Trusted by Homeowners, Estate Agents & Attorneys
Thermo compliance has earned the trust of homeowners, estate agents, property practitioners, and conveyancing attorneys across Cape Town by consistently delivering reliable compliance inspections, quality workmanship, and exceptional customer service. Our reputation is built on professionalism, integrity, and completing every job to the highest standard.
Quality Workmanship You Can Rely On
We are committed to delivering workmanship that meets and exceeds South African industry standards. Every inspection and repair is completed with meticulous attention to detail, using quality materials and proven practices to ensure your property is safe, compliant, and built to last.
Customer-First Service
At Thermo Compliance, customer satisfaction is at the heart of everything we do. From your initial enquiry through to the completion of your inspection or repairs, our team provides clear communication, honest advice, and prompt service to make the entire process as seamless and stress-free as possible.
Need a Plumbing Certificate of Compliance?
Areas We Service
Thermo Compliance proudly serves homeowners, businesses, and property managers throughout Cape Town, including Cape Town City Centre Bishopscourt, Constantia, Camps Bay, Clifton, Bantry Bay, Sea Point, Green Point, Newlands, Pinelands, Claremont, Rondebosch, Hout Bay, Fish Hoek, Noordhoek, Simons Town, Durbanville, Plattekloof, Edgemead, Century City, Bloubergstrand, Stellenbosch, Somerset West, Strand and surrounding areas.
For plumbing compliance certificates specifically, visit Thermo Plumbing, our dedicated plumbing compliance site for Cape Town.
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What is a Water Installation Certificate?
A Water Installation Certificate is an official document confirming that a property’s water installation complies with the City of Cape Town Water By-law at the time of inspection. It certifies that the water system has been inspected by a qualified plumber and meets the municipal requirements for property transfers.
Is a Water Installation Certificate required when selling a property in Cape Town?
Yes. In the City of Cape Town, a Water Installation Certificate is required when ownership of a property is transferred. The seller is responsible for providing this certificate to the conveyancing attorney before the transfer can be finalised, unless otherwise agreed in the sale contract.
Who is responsible for obtaining the Water Installation Certificate?
In most cases, the seller is responsible for arranging and paying for the Water Installation Certificate before the property transfer takes place. However, the Offer to Purchase may contain different arrangements, so it is important to review the sale agreement carefully.
What is inspected during a Water Installation Certificate inspection?
A qualified plumber will inspect various aspects of the property’s water installation to ensure compliance with the City of Cape Town’s Water By-law. This typically includes checking:
- Visible water leaks
- Geyser installation
- Pressure control valves
- Isolation valves
- Water meter operation
- Stormwater connections
- Cross-connections between potable and non-potable water
- Plumbing fittings and pipework
- Compliance of the hot and cold water systems
The inspection helps ensure the property is not wasting water and complies with municipal regulations.
Why is a Water Installation Certificate important?
A Water Installation Certificate helps protect both buyers and sellers by confirming that the property’s plumbing installation complies with municipal requirements. It also assists in identifying hidden leaks, faulty plumbing components, and other issues that could result in water wastage, increased municipal bills, or expensive repairs after the property has been sold.
What are the most common reasons a property fails a Water Installation Certificate inspection?
Some of the most common defects include:
- Leaking taps or pipes
- Faulty toilet cisterns
- Incorrectly installed geysers
- Missing or defective pressure control valves
- Stormwater connected to the sewer system
- Missing vacuum breakers
- Cross-connections between potable and alternative water supplies
- Visible plumbing leaks
- Non-compliant plumbing alterations
Most defects can be repaired before the certificate is issued.
What happens if my property fails the inspection?
If non-compliant items are identified, the inspector will provide a report explaining the defects that require attention. Once the necessary plumbing repairs have been completed, the installation can be re-inspected and the Water Installation Certificate issued once the property complies with the applicable requirements.
Can Thermo Compliance carry out the plumbing repairs?
Yes. If your property does not comply during the inspection, Thermo Compliance can arrange for qualified plumbing professionals to complete the required repairs. Once the defects have been rectified, the property can be re-inspected and the Water Installation Certificate issued.
How long does a Water Installation Certificate inspection take?
The inspection time depends on the size and complexity of the property. Most residential inspections take between 30 minutes and one hour. Larger homes or commercial properties may require additional time.
How long is a Water Installation Certificate valid?
A Water Installation Certificate confirms that the property’s water installation complied with the City of Cape Town Water By-law at the time of the inspection. There is no fixed legal expiry period, but a new certificate is generally required each time ownership of the property is transferred.
Does every property in Cape Town need a Water Installation Certificate?
Yes. Most residential properties being transferred within the City of Cape Town require a Water Installation Certificate before transfer can be completed. This requirement forms part of the City’s efforts to reduce water wastage and ensure compliance with municipal plumbing regulations.
Does a Water Installation Certificate guarantee there are no future plumbing problems?
No. A Water Installation Certificate confirms that the visible water installation complied with the applicable municipal requirements at the time of the inspection. Plumbing systems can develop leaks or faults over time, so regular maintenance is still recommended.
Can a leaking tap cause the property to fail?
Yes. Even seemingly minor plumbing defects, such as leaking taps, leaking toilets, or visible pipe leaks, may need to be repaired before a Water Installation Certificate can be issued. These issues contribute to unnecessary water wastage and are considered during the inspection.
Are geysers inspected during the Water Installation Certificate inspection?
Yes. The geyser installation is an important part of the inspection. The inspector will assess whether the geyser installation complies with the applicable plumbing requirements, including components such as pressure control valves, drip trays where required, overflow pipework, and visible plumbing connections.
What areas does Thermo Compliance service for Water Installation Certificates?
Thermo Compliance provides Water Installation Certificate inspections throughout Cape Town and surrounding areas, including Bellville, Durbanville, Parow, Goodwood, Edgemead, Plattekloof, Milnerton, Table View, Blouberg, Century City, Claremont, Constantia, Brackenfell, Kraaifontein, Somerset West, Stellenbosch, and many other suburbs. If you are unsure whether we cover your area, please contact our friendly team.
Why should I choose Thermo Compliance for my Water Installation Certificate?
Thermo Compliance offers professional Water Installation Certificate inspections with a focus on quality, honesty, and excellent customer service. We work with homeowners, estate agents, conveyancers, and property managers across Cape Town to provide prompt inspections, clear reporting, and practical solutions where repairs are required. Our goal is to make the compliance process as straightforward and stress-free as possible.
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How much does a Water/Plumbing Certificate of Compliance cost in Cape Town?
Pricing depends on the size of the property and the plumbing installation being inspected. Contact us for a fast, no-obligation quote.
Can I get my Plumbing Certificate done together with my Electrical, Gas or Beetle Certificate?
Yes — we can often arrange your Water/Plumbing Certificate of Compliance alongside your Electrical Certificate of Compliance, Gas Certificate of Compliance and Beetle Certificate in a single visit, saving time during a property transfer.
Did your inspection fail? Read what happens after a failed electrical COC inspection and how we get you your certificate.