Ventura County ADU Guide

Moorpark

The City offers three ADU standard plans at approximately 700, 900 and 1,188 square feet.

Official source verified 2026-08-16Official jurisdiction resource ↗
01 / Plan path

Choose the right production starting point.

The City offers three ADU standard plans at approximately 700, 900 and 1,188 square feet.

Express PlanStarting at $4,500

For a qualifying jurisdiction preapproved plan adapted into the property-specific architectural production set.

Custom PlanStarting at $6,500

For an original floor plan and architectural production set developed around the property and homeowner.

02 / Size + fee checkpoints

Size affects more than floor area.

Standard plan sizes indicate the range the City has already reviewed. The objective standards that apply to a custom unit require confirmation with Community Development.

Plan check requires approvals from the Ventura County Fire Department, the Ventura County water and sanitary district and the Moorpark Unified School District, alongside site plans, solar panels and mechanical, electrical and plumbing plans. Contact the Planning Division at 805-517-6258.
500 SFConfirm school-fee assessment rules750 SFState impact-fee protection checkpoint1,000 SFTwo-bedroom state minimum allowance1,200 SFCommon local upper-range checkpoint
03 / Site conditions

Property conditions can change the path.

  • Ventura County Fire Department review
  • Water and sanitary district approval
  • School district fee assessment
  • Zoning and lot configuration
  • Solar requirements
04 / Consultant screen

Likely disciplines to evaluate.

  • Structural engineering
  • Title 24 energy documentation
  • MEP design as required at plan check
  • Survey where boundaries require it

Consultants are retained only when required by the property, design, or reviewing agency. Their proposals and coordination are separate from the architectural production fee unless stated otherwise in the agreement.

05 / Property-specific next step

Turn the guide into a preliminary project report.

Enter the address to screen jurisdiction, mapped constraints, likely agencies, drawing requirements, consultants, and the preliminary fee path.

Check the property →Email Bennett Design Studio →
Important: This guide is general planning information, not a zoning determination, permit approval, fee quote, or guarantee of feasibility. Current parcel records, adopted codes, agency interpretations, utility requirements, site investigation, and written agency confirmation control.