How far you can change a pre-owned condo's floor plan depends on the building's structure and its management rules (kanri kiyaku). Just because a space is your exclusive-use area doesn't mean you're free to change anything about it — checking before you buy is essential. Below, we cover the constraints imposed by structure, the conditions around moving plumbing fixtures, the constraints in the management rules, and the parts you simply can't touch.
- How much freedom you have to change a floor plan depends on the building's structure and its management rules — even your exclusive-use area comes with constraints.
- A rigid-frame structure (rāmen kōzō), supported by columns and beams, tends to make partition walls easier to move, while a wall structure (kabe-shiki kōzō) tends to have more load-bearing walls you can't remove.
- Moving the kitchen, bathroom, or toilet is constrained by drainage slope and the position of the pipe space (PS).
- Windows, sashes, the outer face of the entrance door, and balconies count as common areas, and as a rule you can't replace or alter them on your own.
Conclusion
How far you can change a pre-owned condo's floor plan comes down to two factors: the building's structure and its management rules. Since owning the exclusive-use area doesn't mean you can change anything you like, checking in advance is essential if you're considering a purchase with renovation in mind. Before picturing your ideal layout, the starting point is understanding the outline of what you can and can't do.
The Limits Set by Structure
In a rigid-frame structure (rāmen kōzō), where columns and beams support the building, partition walls often play no structural role, so they tend to be relatively easy to move. A wall structure (kabe-shiki kōzō), where the walls themselves support the building, is more common in low-rise condos and tends to have more load-bearing walls that can't be removed. Which type of structure a building has, and which walls are load-bearing, needs to be confirmed from the as-built drawings (shunkō zumen). If it's hard to judge from the drawings alone, you can also ask the management company or an experienced renovation contractor to check for you.
Moving Plumbing Depends on the Pipes
Moving plumbing fixtures such as the kitchen, bathroom, or toilet is constrained by drainage slope and the location of the pipe space (PS). Even where a physical move is possible, extending the piping distance can push construction costs up considerably. It's worth understanding in advance that "it can be moved, but the cost jumps" is a common pattern when considering a property with renovation in mind. Getting quotes from several contractors and comparing both feasibility and cost is a reassuring step to take early on.
Constraints from the Management Rules
Even renovation work confined to your exclusive-use area is normally subject to the management rules. There's a lot to check: specified sound-insulation ratings for flooring, which days and hours construction is allowed, and the procedures for notifying and getting approval from the management association before work starts. If you don't understand the management rules in advance, your renovation plan itself may turn out to be impossible to carry out. Depending on the scope of work, some management associations also require greeting neighboring units before construction begins.
The Parts You Can't Touch
Windows and sashes, the outer face of the entrance door, and balconies may look like they belong to your exclusive-use area, but as a rule they're actually common areas (kyōyō bubun). You can't replace or change these on your own judgment. When planning a renovation, it's important to accurately understand where the line falls between exclusive-use and common areas. If you want work done on a common area, you'll generally need to apply through the management association. It's worth setting aside the assumption that "it's my exclusive area, so I can do what I like" and confirming the boundary in both the drawings and the rules.
Choosing a Property with Renovation in Mind
If you're buying a pre-owned condo with a floor-plan change in mind, checking the as-built drawings, management rules, and any past renovation history before you buy is essential. If you're serious about renovating, another option is to bring a renovation contractor along from the viewing stage so they can check structural and plumbing constraints on the spot. Taking the time to check thoroughly before you buy helps prevent unexpected trouble after the contract is signed.
FAQ
Can any wall in a condo be removed?
No. Load-bearing walls in a wall structure, and structural walls even in a rigid-frame structure, cannot be removed. You need to check the structure from the as-built drawings.
Can the kitchen or bathroom be relocated?
It depends on the drainage slope and the position of the pipe space. Even where it's physically possible, costs can rise significantly, so checking both the site and the drawings beforehand is essential.
Can I renovate my exclusive-use area however I like?
You're still subject to the management rules. It's common for these to specify the sound-insulation rating for flooring, permitted construction hours, and a notification-and-approval process.
Summary
How far you can change a pre-owned condo's floor plan is determined by the building's structure and its management rules. We recommend checking the as-built drawings and management rules before you buy, and gauging the feasibility of your renovation plans before committing. Letting go of the assumption that your exclusive-use area is yours to change freely is what leads to a property choice you won't regret.