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Application for Secondary Dwelling/Accessory Dwelling Unit (ADU) (LU74)

When submitting to obtain Septic/Onsite Wastewater Treatment System (OWTS) approval from DEH for your proposed secondary dwelling/accessory dwelling unit (ADU), please provide the following:

  1. A completed Land Use Service Application
  2. One (1) copy of site plans to scale (1” = 20’). Plans must include:
    1. Proposed Septic/OWTS upgrades as required
    2. Location of existing septic tank and leachfield (As-built
    3. Scope of proposed building project
    4. Minimum setbacks as required on page 3.11 & 3.12 of the Onsite Systems Manual
    5. Approved water supply (well/public water)
    6. Any additional requirements, as detailed in the Onsite Systems Manual
  3. One (1) copy of proposed floor plans
  4. Additional soil testing may be required to determine minimum sizing and setbacks of Septic/OWTS by completion of one or more of the following:
    1. Site assessment
    2. Soil analysis
    3. Percolation testing (completed by REHS, Professional Civil Engineer, or Professional Geologist)
  5. Current (within last 3 years) Septic Pumper’s Report including 30-minute water test if existing Septic/OWTS is to be utilized
  6. Once all requirements have been completed and plans are ready for an approval stamp, additional copies (4) will need to be submitted.

Three (3) stamped copies are to be picked up and taken to the applicable jurisdiction’s Planning/Building Department for inclusion in the building packet.

NOTE: An onsite inspection may be scheduled for verification of minimum requirements. Additional fees and requirements may apply. All applicable fees must be paid in full prior to any services provided by DEH (inspections, plan reviews, approvals, etc.). Projects/Submittals are reviewed in the order received - with the exception of septic system failures.

Image of a newly constructed home with Septic Wastewater Treatment System being installed

Applicable fees:

PE  Amount     Description

SEPTIC/OWTS FEASIBILITY:

LU01

$603

Site Assessment

LU02

$603

Soil Analysis

LU06

$876

Percolation tests (up to 6 holes) 

PLAN REVIEW:

LU08

$329

Geological Technical Report Review (if slope >20%)

LU13

$986

Land Use Plan Check: Commercial Construction

LU14

$548

Land Use Plan Check: New Residential Construction

LU18

$219

Land Use Plan Check: Resubmittal

LU19

$986

Land Use Plan Check: Pump System Review

SEPTIC/OWTS PERMIT (To be collected at time of Building Permit Issuance):

LU22

$2,027

Residential Septic/OWTS Construction Permit

LU24

$2,410

Commercial Septic/OWTS Construction Permit

LU26

$2,956

Alternative Septic/OWTS Construction Permit (≤ 20% slope)

ADDITIONAL FEES:

LU93

$219

File Review (hourly)

LU96

$219

Consultation/Additional Field Time (hourly)

If modification to existing system is permitted:

SEPTIC/OWTS PERMIT (To be collected at time of Building Permit Issuance):

LU28

$1,205

Septic/OWTS Upgrade/Modification (> 50% of system)

LU29

$767

Septic/OWTS Upgrade/Modification (< 50% of system)

LU30

$1,205

Septic/OWTS Upgrade/Modification - Alternative System 

We will not begin any work until all the items noted above and payment are received.

Please forward all large/over-sized site-maps and necessary documents to the following:

FOR SOUTH COUNTY: (Morgan Hill, San Martin, Gilroy, Hollister, and Watsonville)

County of Santa Clara – DEH
RE: (Project number, once assigned)
80 Highland Av
San Martin, CA  95046

(** NOTE: This location is a satellite office, and only receives packages
and/or appointments 7:30 am – 9:00 am, Monday through Friday. **)

FOR ALL OTHER AREAS:

County of Santa Clara – DEH
RE: (Project number, once assigned)
1555 Berger Drive #300
San Jose, CA  95115

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