For R-4 zoned properties, what percentage of the side property line can be used for firewalls?

For R-4 zoned properties, the regulations typically allow for firewalls to occupy a significant portion of the side property line to ensure safety and compliance with fire codes. In many jurisdictions, particularly those adhering to established zoning laws for residential buildings like R-4, the typical allowance is indeed an 85% usage of the side property line for firewalls.

This percentage is crucial because it balances safety considerations, such as preventing the spread of fire between adjacent structures, while also respecting the rights of property owners to use their space effectively. By allowing a substantial portion of the side property line to be used for firewalls, the regulations support the construction of homes that can withstand fire hazards without sacrificing too much of the usable space.

Additionally, firewalls act as a structural and protective barrier, thus reducing risks in densely populated residential areas. Recognizing this percentage is vital not only for compliance with local building codes but also for maintaining community safety standards.