[Red Line for Balcony Decoration] Is the balcony extrapolation immediately demolished and illegally constructed? Popular Science "Apartment Building Management Regulations" Compliance Standards for Exterior Wall Protection, Window Restrictions and Invisible Anti-fall Nets

The temptation of space is precious: why does everyone want to extend the balcony?

In the greater Taipei area, as housing prices remain high all year round, many homeowners who buy old apartments or medieval buildings always feel that the indoor practical square footage is not enough. Looking at the space of about 1 to 2 square feet on the balcony, I often come up with the idea of ​​"extrapolating the balcony" - that is, removing the original floor-to-ceiling doors and windows of the balcony, knocking off the tiles on the parapet, paving the indoor wooden floor all the way to the outside, and adding an entire aluminum window on the exterior parapet, so that the balcony can be completely integrated into a part of the living room or bedroom. This practice was very common in early old houses in Taiwan, and some homeowners even considered it just a part of the interior decoration. However, under Taiwan's modern building regulations,there is always the risk of being reported for forced demolition. To properly use the balcony without stepping on the red line of the regulations, homeowners must understand the boundaries of the regulations.

Regulations and regulations: Standards for identification of illegal construction of balcony extrapolation vs. balcony windows

In Taiwan's legal practice, the balcony is a statutory "escape and refuge space" and is an accessory building in registration. Its changes are subject to strict restrictions in the "Construction Law" and "Apartment Building Management Regulations":
1. Balcony extrapolation: New illegal construction will be reported and demolished
- Remove the "partition wall" or "floor-to-ceiling window sash" adjacent to the balcony and indoors, and extend the indoor space outwards to the balcony exterior wall.
- This falls under the "change of building structure and the scope specified in the use license". In Taipei City and New Taipei City, all balconies built or renovated after January 1, 1995 (Republic of China 1995) will be classified as "new illegal construction" and will be subject to "immediate demolition" measures, leaving no room for delay in demolition. And even for old illegal buildings before 1995, the government still has the right to forcibly demolish them if they are reported to endanger public safety (such as blocking escape routes).
2. Adding windows to the balcony (adding windows to the parapet): There are different administrative red lines in the two norths
- Many homeowners do not recommend extrapolation, but just install aluminum windows above the original parapet (railing) of the balcony to protect them from wind and rain. In the Shuangbei area, Taipei City stipulates that for any building with a new construction license issued after 1995, it is "strictly prohibited to install windows" on the balconies, and any addition will be regarded as illegal construction. Article 8 of the "Apartment Building Management Regulations" further stipulates that changes to the exterior walls of an apartment building (including the installation of aluminum windows) must be restricted by regulations or resolutions of separate owners' meetings. If the management committee prohibits it, the owner will be in violation.
3. Legal solution: Install "invisible anti-fall net (anti-fall fence)"
- For the safety of young children or cats at home, if you want to prevent falls but cannot install aluminum windows, according to the provisions of Article 8, Item 2 of the "Apartment Building Management Regulations", At this time, the installation of "invisible anti-fall nets" that do not affect the appearance of the building and are stretched using stainless steel wires is a legally compliant protection solution, and the building management committee has no right to prohibit it.

Regulations and construction standards for balcony waterproofing and leakage prevention projects

The balcony is an area that is exposed to wind and rain for a long time. If no extrapolation is made, the waterproof waterway project is the top priority when renovating a compliant balcony:
1. After the balcony tiles are removed, at least three layers of elastic cement or polymer waterproofing materials must be painted, and the waterproofing height must be painted upwards at least 30 cm to 50 cm along the parapet and indoor partition walls to prevent water from penetrating the wall.
2. The balcony floor must have a drainage slope of at least 1/50, sloping towards the water head, and a "water-blocking cement pier (water-blocking threshold)" with a height of at least 3 cm should be constructed under the floor-to-ceiling door to prevent rainwater from crossing the boundary and pouring into the living room during heavy rains.

Budget prices for Shuangbei anti-fall netting and balcony waterproofing projects

In the greater Taipei area, the reasonable budget prices for balcony safety and waterproofing renovations are as follows:
* The cost of continuous strip materials is about NT$ 7,000 to NT$ 12,000, depending on the density of the wires (such as 2.5cm or 5cm for anti-falling cats).
* The cost of a continuous strip of materials (one square meter in size) is about NT$ 25,000 to NT$ 45,000.
* Approximately NT$ 80,000 to NT$ 120,000 / trial (usually the probability of winning is very low, and it is strongly recommended to avoid it).

Commercial acquisitions and businessmen’s long-term asset thinking: extrapolating illegal construction is a landmine of discounts and asset impairment factors in transaction negotiations

For real estate businessmen who specialize in buying old apartments in Shuangbei for renovation, flip, or repackaging for sale, Under the strict construction management environment in the two poles, if a buyer discovers that the property has obvious "illegal construction of new balconies" when inspecting the property, they will often ask for the inclusion of "exemption and claim clauses for illegal construction and forced demolition" in the contract, and the buyer will even pick on the property and use it as a bargaining chip to "reduce the price by 500,000 yuan." The more serious risk is that if a neighbor reports the property before the transfer of ownership and the building management office orders forced demolition, the businessman must pay the demolition replacement fee, which will directly lead to CapEx losing control and prolong the removal cycle of the object on the market. When acquiring old houses, businessmen should try to retain the original balcony layout and plan compliant "invisible anti-fall nets" and "textured open balconies (with wood-plastic flooring and green plants)". This is not only completely legal and avoids the risk of forced demolition, but also can attract high-quality buyers who value the quality of life with the elegant atmosphere of the "balcony garden" and create a 5% to 8% house price premium. This is a stable real estate value-added strategy.

The latest standards for catching leaks and regulatory responsibilities in Shuangbei collective housing (2025-2026 practice)

According to Article 10 of the "Apartment Building Management Regulations" of the Ministry of the Interior and the trend of civil water leakage judgments in Shuangbei District Court in recent years, most water leakage disputes in old collective housing focus on the identification and definition of "exclusive parts" and "common parts". The roof platform and the public pipes are jointly owned by all separate owners, and the repair costs should be shared by public funds or all residents in proportion to their shares according to law; if the water supply and drainage pipes inside the floor slabs on the upper and lower floors are damaged, the pipes will be borne exclusively by the users or shared by the upper and lower floors.

At the engineering and technical level, modern professional leak detection has fully introduced non-destructive scientific testing, including "FLIR high-resolution infrared thermal imaging camera" (locating temperature difference leakage paths), "high frequency moisture meter" (measuring the moisture content of deep structures) and "pipeline air pressure and water pressure pressure test" (determining whether hot and cold water pipes are leaking). During construction, do not directly apply elastic cement or oil-based paint on the wet cement layer to seal it. Otherwise, the thermal expansion of internal water vapor will quickly cause the coating to blister and peel off, resulting in more serious powdery wall cancer. The standard construction method must first completely eliminate the water source, wait until the moisture content of the cement structure drops below 8%, and then apply the negative pressure resistant silicic acid permeability crystallized waterproof layer.

Recommendations on independent certificate storage and compensation process for water leakage repair

1. Take photos and videos as evidence immediately: Use rulers to record the leakage range, frequency of water discharge, direction of water mark diffusion, and keep time stamps.
2. Written notification and coordination survey: Officially notify the neighbors through the management committee or a certified letter, and agree on a professional third-party leak detection and appraisal unit recognized by both parties to conduct an on-site survey.
3. The contract states the warranty terms: When signing the contract for the project, be sure to clearly specify the waterproofing warranty period (usually 1 year for partial repairs, and 2 to 5 years for the whole room or roof re-construction), and specify the water test acceptance criteria (such as a 48-hour water storage test in the bathroom shower area) to protect your own asset rights.