Condo living · Repair responsibility
By Winfred Quek, Associate Marketing Consultant · CEA R073319H · Crestbrick Pte Ltd (L31010886H) · Published 13 July 2026
Facts verified: 13 July 2026 · Classifications differ by development's by laws · Sources attributed below
Of all the questions I get from condo owners, "is this my bill or the MCST's" comes up more than almost any other, usually triggered by something specific: a hairline crack appearing on an external wall, a window that no longer closes properly, a pipe leaking somewhere inside a wall cavity. The frustrating truth is that Singapore does not have one universal answer that applies to every condo. The Building Maintenance and Strata Management Act sets the general framework, but the precise boundary for specific items is drawn by each development's own by laws, and those genuinely differ. This guide sets out the general logic and flags the items most worth double checking against your own development's rules.
The general principle: structure and shared elements versus your own fixtures
The starting framework is reasonably intuitive once stated plainly. Common property, broadly the building's structure, shared facilities, common corridors, lifts, the roof, and infrastructure serving multiple units such as main risers, is the MCST's responsibility, funded through the maintenance fund that every owner contributes to via monthly maintenance fees. Anything that exists solely within your unit and serves only your unit, internal finishes, fittings, appliances, non structural partition walls, is your own responsibility as the owner.
Where this gets complicated is that a meaningful number of everyday repair items sit right on the boundary, physically located at the edge of your unit but arguably part of the building's shared structure or facade. These are exactly the items that generate the most disputes, and where you genuinely cannot assume the answer without checking your specific development's classification.
Windows: often the owner's, but not always
Window frames and glazing are one of the most commonly disputed items precisely because they physically form part of the building's external envelope while also functioning entirely within a single unit's use. Many developments classify windows serving a single unit as the owner's responsibility, on the logic that only that owner uses and benefits from them, even though the window is technically part of the facade. Other developments take the opposite position, treating windows as common property, particularly where maintaining a uniform facade appearance across the building is a priority for the MCST.
Because this classification genuinely varies, if your window develops a fault, a stuck mechanism, a failed seal, cracked glazing, check your development's by laws or ask the managing agent directly before assuming either way. Getting this wrong in either direction, paying for a repair the MCST should have covered, or waiting on the MCST for a repair that is actually your responsibility, wastes time either way.
External walls: structure is common, your finishes are yours
The structural external wall itself, the load bearing concrete or masonry that forms part of the building's shape, is almost universally treated as common property, since it is structurally shared across the development regardless of which unit sits behind it. Where the split occurs is at the internal finish layer: the paint, wallpaper, tiling or built in fittings you have applied to the internal face of that wall within your own unit are your responsibility to maintain, even though the wall behind them is common property.
This distinction matters practically when a structural issue, water seepage through the external wall, for instance, damages your internal finishes. In that scenario, the underlying structural repair is generally the MCST's responsibility, but restoring your own finishes afterward, repainting, retiling, may fall to you unless the MCST's by laws or insurance arrangements specifically cover consequential damage to unit finishes, which some do and some do not.
Pipes within walls: the trickiest category
The practical approach when a pipe related issue surfaces is the same one used for leak disputes generally: engage a qualified party, sometimes coordinated by the MCST, to trace the actual plumbing layout and confirm whether the affected pipe serves your unit alone or forms part of shared infrastructure. Once that is established, responsibility follows logically, your own dedicated supply or waste pipe is your bill, a shared riser is the MCST's, funded through the maintenance fund rather than billed to you individually.
Aircon ledges: a genuinely mixed picture
Air conditioning ledges sit in a similarly ambiguous position to windows, physically attached to the building's exterior but used exclusively by the unit whose condenser sits on them. Some developments classify the ledge structure itself as common property while treating the condensing unit and its immediate fittings as the owner's responsibility. Others place the entire ledge, structure included, within the unit owner's maintenance scope. Rust, cracking or structural concerns with an aircon ledge are worth raising with the managing agent early, both to establish who is responsible and because a genuinely deteriorating ledge can become a safety issue that the MCST has an interest in addressing regardless of the formal classification.
How to find your development's actual classification
- Request the by laws and the strata title plan. The by laws set out the specific classification rules, and the strata title plan shows the legal boundary of your unit versus common property, which is the definitive reference for genuinely disputed items.
- Ask the managing agent before committing to a repair. A quick query before you engage a contractor can save you from paying for something the MCST should have funded, or from waiting on the MCST for something that was always your bill.
- Check the maintenance fund's scope of coverage. Some MCSTs publish a maintenance schedule outlining what the fund covers, which is a useful practical reference alongside the formal by laws.
- When genuinely unclear, get it in writing. If the managing agent gives you a verbal answer on a borderline item, ask for written confirmation before proceeding, particularly for anything above a modest repair cost.
Why this matters when buying a resale unit
A buyer evaluating a resale unit should factor in more than the asking price and the visible condition. If a development classifies windows, aircon ledges or unit level pipework as the owner's responsibility, an older unit with aging original fittings in those categories carries a real future repair cost that a newer, better maintained unit in a development with a more MCST inclusive classification would not. This is a genuinely underweighted factor in most resale purchase decisions, and worth a direct question to the managing agent during your due diligence rather than an assumption either way.
Frequently asked questions
Who pays for window repairs in a Singapore condo, the owner or the MCST?
Window frames and glazing serving a single unit are often treated as the owner's responsibility in many developments, even though windows form part of the building's external envelope, because the by laws frequently designate them as part of the unit rather than common property. Some developments classify windows differently, particularly where uniform facade appearance is a concern. Always check your specific development's by laws rather than assuming a universal rule, since this is one of the most commonly varied classifications.
Is the external wall of my unit common property or mine?
The structural external wall itself is typically common property, since it forms part of the building's structure and facade shared across the development. However, internal finishes applied to that wall within your unit, paint, wallpaper, built in fittings, are usually your own responsibility to maintain and repair.
Who is responsible for pipes that run inside my walls?
It depends on whether the pipe serves only your unit or forms part of a shared riser serving multiple units. A dedicated supply or waste pipe serving your unit alone is typically your responsibility, while a shared riser is typically the MCST's, funded through the maintenance fund. Because the two look identical from the outside, proper investigation of the plumbing layout is the only reliable way to establish which applies.
Who maintains an aircon ledge, the owner or the MCST?
This varies by development. Some classify the ledge structure as common property while treating the condensing unit and its fittings as the owner's responsibility. Others place the entire ledge within the owner's maintenance scope. Check your development's by laws, and raise any structural concern, rust or cracking, with the managing agent early regardless of formal classification.
How do I find out my development's specific repair responsibility rules?
Request the by laws and the strata title plan from the managing agent, which together set out the classification rules and the legal boundary of your unit versus common property. For any borderline item, ask the managing agent directly before committing to a repair, and get the answer in writing for anything above a modest cost.
Evaluating a resale condo and want to understand the real ownership costs?
Maintenance fees, repair classifications and a unit's age all shape true holding cost. A Property Portfolio Analysis puts the full picture against your budget before you commit.
Book a free analysis callWinfred Quek is Associate Marketing Consultant at Crestbrick Pte Ltd, advising Singapore upgraders, investors and families. CEA R073319H. The information on this page is general and does not constitute legal or financial advice. Repair responsibility classifications are set individually by each MCST's by laws and can change. Verify current classifications with your managing agent before committing to any repair.