Adding a side-house roof extension in compliance with regulations.
When planning a side-roof extension, homeowners should be aware of the legal regulations before starting the project—especially since adding a side roof or awning is a popular choice for expanding usable space.
Simply hiring a professional contractor to build the roof you envision is not enough; homeowners must first research and understand the regulations and design options associated with side-roof extensions.
It is important to assess the site, determine the appropriate roof style, and plan the project in a way that avoids compromising the home's overall structure or disturbing neighbors.
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Side-Roof Extensions and Relevant Laws
Generally, extending a home to increase usable space without official permission is a violation of the Building Control Act B.E. 2522 (1979), which governs building modifications and extensions. However, there are five specific exceptions where a permit is not required:
1. “Increasing” or “decreasing” the floor area on any single level by a total of no more than 5 square meters, provided there is no addition or removal of columns or beams. This means that if the area exceeds 5 square meters, a permit is required.
2. “Increasing” or “decreasing” the total roof area by no more than 5 square meters, provided there is no addition or removal of columns or beams. This means that if the area exceeds 5 square meters, a permit is required.
3. Altering the building structure using materials, sizes, quantities, and types identical to the original. This means that if the structural alteration involves materials different from the original, a permit is required.
4. Changing any part of the home’s interior that is not part of the structural framework, using either the same type of material as the original or a different material that does not increase the load on the existing structure by more than 10% of the original weight. This means that... If you modify any part of the house using materials different from the original or increase the weight by more than 10% of the original weight, a permit is required.
5. Modifications, extensions, or alterations to any area of the house that do not affect the building's structural components and do not increase the load on the structure by more than 10% of the original weight do not require a permit. Conversely, if you modify, extend, or alter an area using materials different from the original or increase the weight by more than 10%, a permit is mandatory.
If the backyard extension does not meet the criteria mentioned above, a construction permit is not required.
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Why is extending the side roof important?
Extending the roof on the side of the house—or any other part of the home—is a major undertaking that requires significant time and effort. Nevertheless, such extensions are important and should be pursued when deemed truly necessary. These extensions offer various benefits, including:
1. Enhancing Structural Strength
Homes that have been built and occupied for many years inevitably deteriorate over time; they are particularly vulnerable to damage from natural disasters. Planning a roof extension provides an opportunity to inspect the home's structure—including walls, columns, and beams—to determine if the overall structure remains sound. It allows you to assess what repairs or additions are needed to strengthen the house and prevent further deterioration.
2. Increasing Usable Space
If a newly purchased home has limited space or does not quite suit your lifestyle, a roof extension can solve this problem by expanding and optimizing the available area. For example, consider a home with an enclosed kitchen where cooking odors often permeate the living areas.
By extending the roof outward, you can create additional kitchen space. An open-concept kitchen, for instance, offers better ventilation. Alternatively, if you want a proper garage at the front of the house, extending the roof can protect your vehicle from constant exposure to sun and rain.
3. Commercial Use
If your home is not located in a housing development with restrictions on converting residential space for commercial use—and you plan to run a small private business from home—you might consider extending the roof and other areas to create a home office, a small restaurant, or a shop, as appropriate.
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How to Extend a Side Roof Without Disturbing Neighbors
The key to managing side-roof extensions without causing issues with neighbors is to thoroughly study and understand the relevant laws. Here are the legal guidelines and precautions regarding side-roof extensions to help minimize potential disputes:
1. Eaves or Awning Clearance: A minimum distance of 50 centimeters must be maintained between the roof edge and the property boundary line.
2. Upper-Floor Balcony Extensions: If you are extending a roof over an upper-floor balcony, a minimum distance of 2 meters must be maintained between the balcony and the property boundary line.
Furthermore, if any extension work might impact neighbors, the homeowner should discuss the plans and seek their consent beforehand. In some cases, obtaining a written letter of consent from neighbors is advisable to prevent future conflicts.
As you can see, extending a roof or renovating a property is not just about meeting the residents' needs; it is also about ensuring happiness and avoiding causing trouble for neighbors.
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Special thanks to DD Property for the useful information.
