A toilet renovation in Singapore requires more than just selecting tiles and fixtures—it must also comply with strict renovation regulations, particularly for HDB flats and condominiums. These regulations ensure structural integrity, safety, and adherence to building codes. Failure to comply can lead to hefty fines, forced removal of renovations, or legal consequences.
This guide provides homeowners with a clear understanding of the renovation rules for HDB flats and condos, covering what is permitted, what requires approval, and how to navigate the application process smoothly.
HDB Toilet Renovation Regulations

As public housing, HDB flats are subject to strict guidelines to maintain uniformity and safety. Toilet renovations in HDB units must comply with the Housing and Development Board (HDB) regulations, which are designed to prevent issues such as water leakage, structural damage, and non-compliant modifications.
HDB-Approved Contractors Are Required
Homeowners must hire a contractor listed under the HDB Registered Renovation Contractors’ Scheme (RRCS) to ensure compliance with the required safety and building codes. Not all contractors can legally renovate an HDB toilet. Homeowners can verify their contractor’s status by checking the official HDB website. Unauthorized contractors may use non-compliant materials or unsafe construction methods, leading to penalties or forced rework. Homeowners looking for reliable professionals should review choosing the right contractor for your toilet renovation to avoid common pitfalls and ensure smooth project execution.
Waterproofing and Hacking Restrictions
Poor waterproofing and unauthorized hacking can lead to severe structural issues and costly penalties. Homeowners can avoid unnecessary expenses by understanding common toilet renovation mistakes and how to avoid them before starting their projects.
HDB has strict rules regarding waterproofing and hacking works to prevent structural damage and water leakage to lower-floor units. If floor tiles are being replaced, the waterproofing layer must also be redone using HDB-approved methods. Any hacking of walls, flooring, or structural elements requires prior approval from HDB. After waterproofing work is completed, an HDB-appointed inspector will conduct a mandatory water retention test before tiles can be installed.
Plumbing and Drainage Guidelines
Plumbing work must follow HDB’s drainage and sanitary system regulations to prevent blockages and leaks. Pipes cannot be relocated freely, and their placements must remain as per the original design unless specific approval is obtained. Public Utilities Board (PUB)-approved pipes and fittings must be used to maintain water efficiency. Floor traps must also remain accessible for maintenance and cleaning.
Renovation Permit Requirements for HDB Toilets
Certain renovation works in HDB flats require prior approval through a renovation permit application submitted by the contractor. Works that require a permit include hacking of floors, walls, or existing tiles, removal or repositioning of toilet walls, and major plumbing or drainage system modifications. However, minor works like replacing toilet fixtures, painting, or simple touch-ups do not require permits.
Condo Toilet Renovation Regulations
Unlike HDB flats, private condominiums are governed by the Management Corporation Strata Title (MCST), which enforces renovation rules that vary across different developments. Each MCST has its own set of guidelines to maintain safety and uniformity within the property.
Approval from MCST Is Mandatory
Before carrying out any toilet renovation, homeowners must seek approval from their condominium’s MCST office. Each development has unique rules, and some may be stricter than HDB regulations. MCST may impose restrictions on the timing of renovation works, material choices, and any hacking or alteration of structural walls. Homeowners must submit a renovation proposal along with detailed plans, contractor information, and an estimated work duration for approval.
Plumbing and Waterproofing Compliance
Condo management follows Building and Construction Authority (BCA) and Public Utilities Board (PUB) standards for plumbing and waterproofing. Waterproofing must be maintained to prevent leaks into adjacent units, and any modifications to the drainage system may require additional approval. Only licensed plumbers can carry out pipework to ensure compliance with water efficiency regulations.
Restrictions on Common Property Modifications
MCST has the authority to restrict any work that affects common property, including external bathroom windows, drainage outlets, and shared plumbing systems. If renovations affect a shared drainage system, additional approvals may be required. Some condominiums do not allow modifications to external-facing toilet windows or ventilation ducts to maintain a uniform building façade.
Key Differences Between HDB and Condo Toilet Renovation Rules
HDB and condo toilet renovations share similarities in requiring permits and compliance with waterproofing and plumbing standards, but key differences exist.
HDB renovations must be carried out by HDB-registered contractors, while condos do not have this requirement. However, condo homeowners must adhere to MCST rules, which vary by development. HDB requires a mandatory water retention test for waterproofing, while MCST may impose additional checks depending on their guidelines. Hacking walls and flooring in HDB units requires strict approval, whereas condo hacking restrictions depend on the specific MCST regulations. For plumbing, HDB enforces the use of PUB-approved materials, while condo regulations must follow both PUB and BCA standards.
Penalties for Non-Compliance
Homeowners who fail to comply with HDB or condo renovation regulations may face serious consequences, including fines, forced removal of non-compliant works, and delays in renovation completion. Fines for unauthorized renovations can range from SGD 1,000 to 5,000, depending on the severity of the violation. In some cases, homeowners may be required to restore the unit to its original condition at their own expense. Non-compliance issues can also result in work stoppages and extended project timelines, adding further costs and inconvenience.

How to Ensure a Smooth Toilet Renovation
To avoid issues, homeowners should check renovation guidelines early by reviewing HDB’s website or consulting their condo’s MCST before planning their renovation. Working with experienced contractors, especially HDB-licensed renovation contractors or firms with proven experience in condo renovations, can help ensure compliance. Submitting necessary permits before starting work prevents unnecessary delays or penalties. Scheduling renovations within approved hours helps avoid complaints or work stoppages. Finally, clarifying rules on plumbing and hacking before committing to modifications ensures a smoother process without unexpected obstacles.
Conclusion
Understanding the renovation regulations for HDB and condo toilets is essential for ensuring a smooth and compliant renovation process. While HDB has strict guidelines on waterproofing, plumbing, and hacking, condominiums follow MCST-specific rules, which vary across developments. Homeowners should always seek approval from the relevant authorities, hire experienced contractors, and plan renovations carefully to avoid fines, delays, or unnecessary rework. By following these best practices, homeowners can complete their toilet renovation efficiently while staying within legal and structural guidelines.