When Does the Subdivision Process Apply?

The County subdivision process applies when a property owner splits a parcel into:

  • Six or more parcels; and
  • Any one of these parcels is smaller than 36-acres.

 Purpose of the Subdivision Process

  • Promote orderly growth and sensitive design;
  • Provide for adequate roads, utilities, water and wastewater treatment;
  • Ensure structures are not built in areas that are subject to flooding;
  • Divide a large parcel into smaller lots for sale; and
  • Obtain a density bonus when subdividing ten or more lots.

It is helpful to schedule a preliminary meeting with County staff to answer questions before formal subdivision submittal

What is a Tentative Plat?
The tentative plat is the working map of the new subdivision. It shows the lay out of road and lots, topography and the location of utility easements and common areas.

Who Reviews the Tentative Plat?
The tentative plat is reviewed by a number of agencies, including the County Assessor’s Office, and the County Health and Highway & Floodplain Departments, State, and other agencies such as the Fire Department or School District when appropriate, to ensure that it conforms to the Subdivision Regulations and to determine the level of on and off site improvements needed.

Who Approves the Tentative Plat?
The Planning Commission, a 9-member board appointed by the Board of Supervisors (BOS), reviews and approves the plat at their regular meetings on the2nd Wednesday of each month. Their task is to ensure that the plat conforms to the Subdivision Regulations and addresses public safety issues such as emergency vehicle access, safe roads and adequate water.

What is a Final Plat?
The final Plat is a formal map that is recorded in the Recorder's Office. Once recorded, it defines the legal boundaries of each lot and records public roads and utility easements. The final plat must be substantial conformance to the approved tentative plat.

Final Plat Approval & Waivers
The BOS approves the final plat at their meetings each Tuesday of the month (except the 5th Tuesday) at 9:00 a.m.  (Click here for the BOS meeting calendar.)  Only the BOS can grant a waiver from requirements of the Subdivision Regulations. A waiver can be heard in advance of the final plat meeting or it can be heard at the same time as the plat is presented to the Board. If heard before the plat a fee is charged.

Please Note: tentative and final plat must be drafted by a surveyor or engineer registered in the State of Arizona.

Improvements and Lot Sales
The subdivider is responsible for all drainageway and road improvements, street signs, lot staking, water and waste disposal systems and other improvements. If warranted by the size of the subdivision, the subdivider can also be asked to pay the fair share of off-site improvements such as paving a dirt road.

After a final plat approval and recordation, lots will be released for sale when:

All public improvements are completed and certified by the subdivision engineer to be in conformance with plans approved by the County Engineer, and

The County Engineer inspects and accepts the improvements.

Please note: the subdivision engineer is responsible for scheduling County inspections throughout the construction of improvements.

When is a Homeowner's Association Required?
A homeowner's association is required whenever the subdivision has private common areas that are not maintained by the County. Common areas can include private roads or commonly owned open space.

Submittal Requirements

Tentative Plat

  • 8 full size copies of the Tentative Plat (15 copies if the County sends to the utility companies instead of the developer) (1 reduced copy of the final version of the Plat)
  • Letter of Intent Describing the Subdivision
  • Soil Percolation Tests
  • Hydrology & Hydraulic Report (reviewed by the Highway & Floodplain Department)
  • Proof of Ownership Showing Clear Title to the Land & that Property Taxes are paid
  • Legal Description
  • Copy of Arizona Department of Water Resources Application for Water Adequate Determination
  • Deed Restriction, if any
  • Comments from any city located within 3 miles of the site

Final Plat

At least 4 copies of the full sized Final Plat

  • Fee
  • Copy of Arizona Department of Water Resources Water Adequacy Determination
  • Method to pay for Improvements such as Improvement Bond with cost estimates, or Agreement with County to Assure Improvements before Sale of Lots
  • Legal Description with Boundary Closures
  • Mylar and Reduced Copies of Plat and Recording Fees to be provided before the BOS meeting.

 Other items may be required such as a Traffic impact Report when warranted by the size of the subdivision. Processing will begin when fees and all review information are submitted.

Conservation Residential Subdivision Option

A conservation Subdivision Option is available in all residential zoning district that:

Allow for design flexibility in harmony with the terrain

Can result in more cost effective development due to decreased grading and more efficient placement of roads and utilities

Offers a 34% density bonus in Rural Zoning Districts, and

Provides 25% minimum open space for private or community use

(See Section 1814 of the Zoning Regulations)