///Residential Tenant Improvement Application Requirements

Residential Tenant Improvement Application Requirements

If you are pulling a building permit on a property that is serviced by a septic system, you will need to complete the Tenant Improvement application and submit it to SNHD.

Appointment Details:
Plans are submitted over the counter and the meeting is an hour long. Appointments are located at the main SNHD building located at: 280 S Decatur Blvd. The fees for the plan review for a tenant improvement are $160 – whether approved, denied, or deferred. Payment of fees are required prior to meeting with the plan reviewer. Payment for the appointment can be made online or at the counter – online payments need to be requested prior to meeting. We accept most forms of payment – we DO NOT accept personal checks (business check is acceptable).

A Tenant Improvement Application is required for the construction of a new structure with or without plumbing or the remodel of an existing structure, prior to the issuance of a building permit or certificate of occupancy from the Building Department of the local jurisdiction. The septic remodel review consists of three parts:

  • Evaluation of the location of the proposed structure in relation to the existing septic system (i.e., are the required setbacks met?). A table of required setbacks is listed below – Minimum Horizontal Separation Distance.
  • Evaluation of septic system capacity to service the proposed plumbing changes (if applicable). If the property is served by a community well, an inquiry to the Nevada Division of Water Resources will be made for requests for improvements that require additional water demand. You can verify if your permit is overdrawn by contacting the Nevada Division of Water Resources at (702) 486-2770 or by visiting their website www.water.nv.gov
  • Evaluation of the existing septic system permit to determine whether the septic system in good standing and meeting the applicable regulations regarding proper maintenance and operation (see list of common permit violations below).

Submittal Requirements:
All applicants will need to submit a completed Tenant Improvement application in addition to the requirements listed below.
An updated site plan showing the existing septic system(s) and the proposed structures will need to be submitted – see below for requirements. Interior remodels where there is no change to the existing footprint or new structures added can use the existing plan on file for submittal IF AND ONLY IF the existing plans on file meet the requirements below. You can find a copy of the most recent plot plan here:

Find Septic Systems Plans

The plot plan is the bare minimum information required for submittal. Changes in plumbing (additions or deletions) will require a floor plan or plumber’s letter depicting the drainage fixture units that are being serviced by the septic system. The submittal requirements may vary for each lot as no two septic systems are installed the same. SNHD may require additional information for the plan reviewer to approve the remodel request.

Site / Plot Plan Requirements:
The plan must show the entire lot as well as the following information:

  • North directional arrow
  • Drawn in a standard Engineer or Architectural SCALE
  • (Engineering Scale Examples: 1”=10’ or 1”=20’ or 1”=40’)
  • (Architectural Scale Examples: 1/16”=1’ or 1/8”=1’ or 3/32”=1’)
  • All existing and proposed structures and their uses (house, garage, storage shed, temporary trailer, pool, retaining wall, etc.)
  • Location of all proposed driveways
  • Location of well and/or neighboring wells (if applicable)
  • Proposed location of water meter, water service lines, and fire hydrants
  • Watercourses (wash, flood control channel, irrigation ditch, etc.)
  • Street name(s) / Right of Ways and width of dedication to centerline
  • All Easements of Record
  • Distance from septic system to house, well, property line, water line, proposed swimming pool, etc.
  • Location of all existing and /or proposed septic system designs on the property.

Common Permit Violations:
Per SNHD Regulations Governing Individual Sewage Disposal Systems and Liquid Waste Management Section 3.7*, a Tenant Improvement approval request shall be denied if the existing septic system is in violation of any of these Regulations. Below is a list of the most common permit violations (please note this list is not exhaustive):

  • Presence of trees within 10’ of the septic tank and/or leach field
  • Traffic over the septic system
  • Heavy flatwork over the septic system
  • Pool or water line within 10’ of the septic tank or within 25’ of the leach field
  • Existing community well is being overdrawn (contact Nevada Division of Water Resources at (702) 486-2770 or visit their website (www.water.nv.gov) to determine if the well is good standing)

*The complete regulations can be found at: https://www.southernnevadahealthdistrict.org/download/eh/isds/sewage-regs.pdf
Building Department Clearance Requests:

Email septics@snhd.org with the jurisdictional building permit number (Example: BD20-5555) and the SNHD permit number (Example: ON0012345). Our staff will respond within one business day to requests for building clearance.

Fixture Unit Calculation – multiply each fixture you have by the number of units to get the Total Fixture Units. Note: If existing, the fixture unit count may be different.

Fixture Unit Calculator

Fixture TypeNumber of FixturesMultiply By Fixtures UnitFixtures unit
Bidet2 units0
Water closets (or Toilets)2 units0
Bathtubs2 units0
Showers2 units0
Lavs (or Hand Sinks)1 units0
Kitchen Sink2 units0
Clothes Washer2 units0
Laundry Tub1 units0
Vegetable Sink1 units0
Wet Bar1 units0
Floor Drain2 units0
Total Fixture Units0
Septic System Minimum Sizing
Percolation Rate* (Minutes per Inch)
Min. Septic Tank Size (Gallons)0
Min. Leach Field for Pipe and Gravel (Sq. Ft)0
Min. Leach Field for Chambers (Sq. Ft)0
*15 Minutes per inch is standard for Clark County without a percolation test. Do not change this number unless a percolation test was done by a Professional Engineer (PE) licensed in Nevada.

Recommended Dimensions of Pipe & Gravel Leach Field

775 square feet935 square feet1165 square feet1550 square feet1745 square feet1940 square feet
12 x 6512 x 78
18 x 4318 x 5218 x 6518 x 8618 x 97
24 x 3324 x 3924 x 4924 x 6524 x 7324 x 81
30 x 2630 x 3130 x3930 x 5230 x 5830 x 65
36 x 4336 x 4936 x 54
42 x 47

Minimum Horizontal Separation Distance

Minimum Horizontal Separation Distance From:Septic Tank (in feet)Shallow Absorption System*Deep Absorption System **
Building or Structure8820
Property Line101010
Water Supply – Wells100100150
Streams or Watercourses100100150
Soil Disposal Systems5
Community Water Main Lines102525
Individual Water Service Lines102525
* Four feet deep or less from ground surface to bottom of system
** Greater than 4 feet deep from ground surface to bottom of system two percolation tests and soil borings will be required.

Contact Information


Updated on: December 30, 2020

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