Due to the extensive construction work required, prepare to dig deeper into your pockets when undertaking a home addition project. Unlike ADUs, additions generally come with higher costs due to the need for new foundations, roofing, and integration with the existing structure.
In the City of Riverside, any residential property can add at least one Accessory Dwelling Unit, per State law. Properties developed with single-family homes can also add a Junior Accessory Dwelling Unit.
Percentage-Based Fees The percentage depends on the type of project but is typically between 6% and 15%, depending on the size and complexity.
Contractors who violate the law are subject to disciplinary action by CSLB, including civil penalty assessments of up to $8,000 per violation, an order of correction that requires payment of permit fees and any assessed penalties imposed by the local building department, and suspension or revocation of the license.
Generally, the state of California will require the following components before applying for a building permit: Professionally drawn blueprint. Site plan. ​​Floor Plan. Foundation Plan. Soil Inspection and Land Survey. Architect License (Required for homes over 3,000 sq ft. Engineering License Stamp.
Submit your application and 3 sets of plans with calculations and specifications to HCD's plan check section. Once the submittal is received in the plan check section, the plan will require 4 to 6 weeks for review.
Per the California Residential Code detached accessory structure not exceeding 120 square feet does not require a building permit if there is no plumbing, electrical, and or mechanical equipment. Please note, Sheds and/or Structures under 120 square feet do require a Planning Permit.