BUILDING DESIGN AND CIVIL ENGINEERING CONSULTING

A building code is a set of laws and regulations that controls how buildings are designed, constructed, and maintained. It covers things like structural safety, electrical and plumbing systems, heating and ventilation, fire protection, and safe exits. The main purpose is to ensure that buildings are safe for the people who live or work in them by establishing minimum safety standards.

In general, a property owner or someone authorized by the owner must get a building permit before doing most significant construction-related work on a building or structure. That includes work such as:

• Building something new
• Expanding or remodeling
• Repairs
• Moving or demolishing a structure
• Changing how the building is used or occupied

The owner or agent must apply to the local building official and receive approval before starting the work.

There are some specific exceptions where a permit is not required under the International Code Council’s International Residential Code (IRC). However, even if a permit is not required, the work still must comply with all applicable building codes, laws, and local ordinances.

The following building works are exempt from the building permit requirement as stated in 2021 IRC:

• One-story detached accessory buildings where limited to 200 square feet in floor area(other than storm shelters)
• Fences not over 7 feet high
• Retaining walls not over 4 feet high
• Water tanks supported directly on grade, if the capacity does not exceed 5,000 gallons and the height to diameter ratio does not exceed 2 to1
• Sidewalks and driveways
• Painting, papering, tiling carpeting,  Cabinets, Counter tops and similar finish work
• Prefabricated swimming pools less than 24 inches deep
• Swings and other playground equipment
• Window awnings supported by an exterior wall that do not project more than 54 inches from the exterior wall
• Decks, if (1) 200 square feet maximum, (2) limited to 30 inches above grade, (3) not attached to a dwelling and (4) not serving the required exit door.

Many residential buildings are exempt from the requirements of the International Building Code (IBC) because they fall under a different code: the International Code Council’s International Residential Code (IRC).

Under the IRC, the following types of residential structures are covered:

• Detached single-family homes
• Detached duplexes
• Townhouses
• Accessory structures associated with those buildings (such as garages, sheds, etc.)

To qualify under the IRC, the buildings must generally:

• Be no more than three stories above grade plane
• Have individual means of egress

The IRC provides comprehensive prescriptive requirements for:

• Building construction
• Plumbing systems
• Mechanical systems
• Electrical systems
• Energy efficiency

Structures outside these limits or occupancies are typically regulated by the International Building Code (IBC) instead.

Required Building Inspections

The inspection function is one of the most critical activities in the entire code enforcement process. At various stages of construction, inspectors provide the final verification that a building complies with safety-related code requirements. When appropriate, the building official may accept inspection reports from approved agencies that verify compliance with applicable code provisions. These agencies must be highly qualified and reliable.

Required Inspections (where applicable)

1. Foundation Inspection
   Inspect setback from lot lines; Inspect footing dimensions; Inspect reinforcement; soil conditions (suitable soil and base materials); Vegetation, loose soil, and debris removed; sufficient depth for frost protection; and foundation construction before concrete placement.
2. Plumbing, Mechanical, Gas, and Electrical Inspections
   Ensures all systems are installed according to code and safety standards before concealment.
3. Floodplain Inspection
   For flood hazard areas, confirm compliance with flood hazard area regulations and required elevation standards. Elevation certificate prepared and sealed by a registered design professional before work proceeds above.
4. Frame and Masonry Inspection
   Checks structural framing, masonry work, connections, and load-bearing components.
5. Fire-Resistance Rated Construction Inspection
   Verifies fire-rated assemblies, penetrations, fire stopping, and related protection systems.
6. Other Inspections Required by the Building Official
   Additional inspections may be required depending on the project type, complexity, or local regulations.
7. Elevation Documentation Inspection
   Reviews elevation certificates or related documentation to confirm compliance with floodplain requirements.
8. Final Inspection
   Conducted upon project completion to verify the building is safe and ready for occupancy. Inspect comfort heating, cooling, and ventilation equipment and systems; Inspect plumbing fixtures and systems; Inspect electrical circuits, devices, and fixtures; Inspect stairs, railings, landings, and other means of egress components; Inspect smoke alarms; Inspect emergency escape and rescue openings; Inspect other items regulated by the code.

Site development in designated flood hazard areas must meet special requirements for flood-resistant construction to minimize damage during a flood event. State or local floodplain management ordinances often supersede the IRC provisions for flood-resistant construction. Requirements are similar, however, and are designed to satisfy the minimum standards set forth in the National Flood Insurance Program (NFIP), managed by the Federal Emergency Management Agency (FEMA) (Figure 3-8). [Ref. R322].