Standard Plans

for Accessory Dwellings/Farmworker Housing

General Information Fact Sheet

___________________________________________________________

Standard plans are available for three different sizes and accessory dwelling unit configurations:

1. 700 square foot, one-bedroom unit 2. 900 square feet, two-bedroom unit 3. 1,200 square feet, three-bedroom unit

When an applicant applies for permits to construct an accessory dwelling unit using one of the standard plans, the standard plan cannot be modified in any way.

A separate building permit is required for each unit constructed. Also, a geotechnical/soils report must be prepared for the 1,200 sq. ft. standard plan.

Building permits for Accessory Dwelling Units will only be issued to the property owner or to a licensed contractor who has been contracted to do the work. If the permit is issued directly to the owner, the owner must do the construction.

The Accessory Dwelling housing plan is not to be used for construction of homes in the Lockwood Valley area or other areas above the 4,000 ft. elevation. The Ventura County Building Code does not allow approval of these standard plans in those areas. These standard plans are not to be used for construction of homes in the La Conchita area or other areas with adverse geotechnical conditions. The foundations for these structures have not been designed to accommodate adverse geotechnical forces or movement.

Standard Plans for Accessory Housing

Checklist for using a Standardized Plan

___________________________________________________________

Conduct Initial Review

Step 1: Verify the lot status and if the zoning for the property allows this type of building. Contact or visit the County’s Planning Division to check zoning consistency and legal lot status. Each Zone has development standards requiring appropriate building setbacks, lot coverage, etc. that must be met.

Step 2: Verify that the property is not subject to adverse geotechnical conditions and meets slope setback requirements. Contact or visit the Building & Safety Division. In some cases, you may then be referred to the Public Works Agency.

Step 3: Verify that the property will have adequate water supply. For properties served by a private water well (1-4 connections, less than 25 people served annually) located on the property, obtain clearances from County’s Watershed Division and a Certification of Water Quality from the Environmental Health Division. Separate review fees will apply. Private water wells must meet minimum flow and water quality standards to obtain approval. For properties connected to a public water system, obtain a clearance or Will Serve letter from your local water purveyor.

Step 4. Verify that the property will have adequate sewage disposal. If the property is served by an on-site waste treatment system (septic system), contact or visit the County’s Environmental Health Division. Separate review fees will apply. See attached table for preliminary septic system design information. If served by a pubic sewer entity, a clearance from that entity must be provided.

Step 4. Verify if the building must have a fire sprinkler system and if fire access and water flow are adequate on the site. Contact the Fire Protection District.

Obtain Final Clearances…Obtain the following permits/clearances and pay associated fees:

• Planning – Zoning Clearance, and tree permit, if necessary; if standards are met, this is usually issued in one day.

• Environmental Health (septic system) – approved septic system plan; Environmental Health staff will review the septic system design and geotechnical report. The review process takes approximately two weeks and is followed by the issuance of a permit to construct a new septic system, or a full certification of an existing septic system.

• Environmental Health (well water) – approved certification of water quality; Environmental Health staff will review information such as: water quality results, an approved pump and recovery test, and a site plan. The certification process takes approximately two weeks, includes a site inspection, and is followed by an approved certification of water quality form.

Standard Plans for Farmworker and Accessory Dwelling Units in

Unincorporated Ventura County

Ventura County Board of Supervisors MeetingOctober 24, 2017

Standard Plans for Accessory/Farmworker Dwellings

Project Objectives:

• Address concerns raised by the farming community that the development of farmworker housing was too difficult

• Fulfill Housing Element Program 3.3.3-5(9) to develop pre-approved building plans for second dwelling units.

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WINDOW AND DOOR SCHEDULE

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ASSESSORY DWELLING UNIT SEPTIC SYSTEM SIZING GUIDELINES

For farmworker dwellings with </= 25 plumbing fixture units Septic tank size = 1,000-gallon capacity

Size of Dwelling

(Square Feet) Percolation Rate

(minutes/inch) Leach Line Length in Feet

Based on Standard leach line size: (3 feet wide, 30 inches or 2.5 feet of rock below pipe)

700

Up to 45 50 60 55

900

5 50 15 63 30 83 45 100 60 110

1,200

5 63 15 95 30 125 45 150 60 165

Dwelling specifications: 700 ft2 = 1 bedroom, 1 full bath, kitchen, washer

900 ft2 = 2 bedrooms, 1 full bath, kitchen, washer

1,200 ft2 = 3 bedrooms, 2 full baths, kitchen, washer

This chart should only be used for general guidance where:

✓ Highest groundwater is at least 10 feet below surface. ✓ 5-foot separation exists between bottom of leach line(s) and bedrock. ✓ Surface waters, such as streams, drainage channels, ponds, subsurface drainage systems

are at least 100 feet from the leach line(s). ✓ All water wells are at least 150 feet from the leach line(s). ✓ Surface slope does not exceed 25%. ✓ Available public sewer is greater than 200 feet from the parcel.

NOTES:

1. The information on this chart is not a full listing of applicable requirements; local conditions may result in differing requirements.

2. All septic systems must be designed by a California Registered Professional Engineer or Registered Environmental Health Specialist and installed in conformance with Appendix Chapter H of the Ventura County Building Code.

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