You Bought Land in Cochise County. Here Is the Order to Do Everything.

Most people arrive at this in the same state. They found four acres online for less than the price of a used truck, the photos showed grass and mountains, the closing was easy, and now they are standing on it with a folder of paperwork wondering which end to pull.

The order matters more than the individual steps. Almost every expensive mistake we get called out to fix in the Sulphur Springs Valley is a sequencing mistake — a pad graded before anyone checked where water goes, a driveway built to a corner that turned out to be seventy feet inside the neighbour's parcel, a septic location picked before the well location, a tank set on ground that moves.

This is the order. It is written for a typical parcel around Sunsites, Pearce, Willcox or Dragoon, on the assumption you are not connecting to a city sewer and probably not to a power line either.

Phase 1: Verify what you actually bought

Do all of this before you spend money on the ground. Every item here is free or nearly free, and every one of them has stopped somebody from building on a parcel they could not build on.

1. Confirm you have legal access

This is first because it is the one that cannot be fixed with money. A road drawn on a 1970s subdivision plat is not necessarily a road that exists, and it is not necessarily a road you have a legal right to use. Some parcels in this county are reached daily by a two-track that crosses somebody else's land with no recorded easement — which works fine until the day it does not.

What you want to see is a recorded easement or frontage on a county-maintained road, in writing, in the chain of title. Not a track on a satellite image. We wrote a whole article on how to check this, because it is the single most common way a cheap parcel turns out to be unbuildable.

2. Pull the well and water picture

ADWR's Wells 55 registry lets you draw a box around your parcel and read the depth and static water level of every registered well near it. This is public, free, and better information than any listing agent will give you. If the neighbouring wells were drilled to 300 feet in 1985 and 540 feet in 2019, that tells you something the parcel description never will.

Then find out which groundwater basin you are in, because it changed recently. Willcox, Pearce, Sunsites, Kansas Settlement and Dragoon are inside the Willcox Active Management Area, designated in January 2025. Benson, St. David, Sierra Vista and Tombstone are not in any AMA. Douglas, Elfrida and Sunizona are in the Douglas AMA. It does not stop you drilling a domestic well, but it changes the paperwork and it changes what the land around you can do.

3. Check the fissure map and the flood map

The Arizona Geological Survey maps earth fissures — ground cracks caused by aquifer subsidence — and the Willcox basin has more than fifty miles of them. Some are wide enough and deep enough to swallow a vehicle. The map is free and takes two minutes.

The county's flood zone map is the other one. On some 1960s subdivisions a meaningful share of the platted lots sit in a floodplain, which does not mean you cannot build, but it does mean a Floodplain Use Permit and a different construction standard.

4. Pull your soil map

NRCS Web Soil Survey gives you the soil map unit for your exact parcel, including the depth to a restrictive layer. In this valley that restrictive layer is usually caliche, and its depth is the single biggest unknown in every excavation quote you will receive. Knowing it in advance turns a surprise into a budget line.

Phase 2: Find the corners

You cannot plan a driveway, a pad, a septic field or a fence until you know where the boundary is, and on most parcels here there is nothing to see. The 1970s survey pins are under six inches of soil, under a mesquite, or gone.

Doing this properly means a licensed surveyor. Doing it approximately means GPS from the recorded plat, which is good enough to plan with and not good enough to build a fence on. Either way it happens before the machine arrives, not after. Moving a graded pad is a second grading job.

Phase 3: Decide where everything goes, on paper, at once

This is the step people skip, and it is where the sequencing errors get locked in. The locations of the well, the septic drainfield, the building, the driveway and the tank are not five independent decisions. They constrain each other:

• Well to septic: 100 feet minimum. That is a state rule and it is not negotiable.
• Septic to property line: 50 feet where you share a line with an adjoining lot on no common water system, reducible to 5 feet with the neighbour's agreement.
• Septic to any wash or drainage easement draining more than 20 acres: 50 feet, reducible to 25 with erosion protection.
• Well to property line in Cochise County, on parcels of 5 acres or less: 5 feet, and the county inspects and GPS-marks it.
• Septic to the building: 10 feet. Water main: 10 feet.
• Water storage uphill of the house if you want gravity pressure. Every 2.3 feet of elevation is about 1 PSI.
• Solar array clear of shade, which on a valley parcel is usually easy and on a parcel against a hill or with mature mesquite is not.

On a four acre parcel with a wash through it and a driveway coming in from one corner, those constraints intersect fast. Draw it once, properly, before anybody digs.

Phase 4: Permits, in this order

5. Right-of-way permit, before the driveway

If your access comes off a county road you need a Right-of-Way Permit from Cochise County Engineering & Natural Resources before you cut the driveway or set a culvert. The fee starts at $100. The permit conditions cover sight distance, drainage, traffic control and surfacing.

Two things about culverts that catch people out: the county does not buy, install, maintain or clean driveway culverts — that is entirely the property owner — and the permit has to be approved before you buy the pipe, not after.

6. Soil and site evaluation, before the septic permit

Cochise County requires a soil and site evaluation by a state-certified evaluator before you apply for a septic permit. That means at least three test pits — two in the primary disposal area and one in the reserve field — dug to twelve feet or to an impervious layer, whichever comes first.

That "impervious layer" clause is where caliche enters the story. If the evaluation finds a cemented layer at four feet, your conventional drainfield may be off the table and you may be looking at an engineered or alternative system, which is a different budget entirely. Better to learn that from a test pit than from a failed system.

Note also: a composting toilet does not exempt you. Kitchen drain water is not classed as greywater in Arizona, so you still need a small septic system.

7. Notice of Intention to Drill, before the driller

A domestic well with a pump capacity of 35 gallons per minute or less does not need a groundwater permit, even inside the Willcox AMA. It does need a Notice of Intention to Drill filed with ADWR, and the work has to be done by a licensed well-drilling contractor. On parcels of five acres or less in Cochise County the application goes through the county first, which verifies setbacks and takes GPS coordinates.

Phase 5: Now bring the machines

With access confirmed, corners known, layout drawn and permits in hand, the ground work runs in a sensible order:

1. Driveway and access first. Everything else arrives on it — the drill rig, the septic tank, the water tank, the lumber. Building the driveway last means every delivery churns up your finished ground.
2. Clearing. Selectively, to the extent the layout needs. See the note below on what not to remove.
3. Rough grading and drainage. Get water moving away from where the structures will be before you build anything for it to move toward.
4. Pad, cut and compacted. Compaction is not optional and it is not eyeballed.
5. Trenching, for water line, conduit and any propane, while there is still open ground to work in.
6. Well and septic, both of which need rig access — another reason the driveway went in first.
7. Tank pad and tank. A poly tank full of water is roughly 8.3 lb per gallon; a 2,500 gallon tank is over ten tons sitting on whatever you put under it.
8. Erosion control on everything you disturbed, before the next monsoon, not after.

Phase 6: The address, and why it comes late

Most vacant property in Cochise County has no address. Addresses are normally assigned through the building permit process — which creates an obvious problem, because you often need an address to get a utility account, a delivery, or an emergency response.

There is a route around it: contact Development Services directly and request an address on the grounds that it is needed for utilities. If your access road has no official name or the wrong one, a road name petition has to be filed first, which takes longer than people expect. Start that conversation earlier than feels necessary.

Phase 7: Power

Grid or solar is a genuine calculation here, not an ideology. SSVEC will engineer a line extension quote for a $150 design fee on a residential run up to 400 feet, plus $0.20 a foot beyond that — and the quote that comes back is the real number, because every extension is individually engineered for permitting, easements, materials and trip charges.

Get that quote. Then compare it against an off-grid system sized for this location, which is a genuinely favourable place for solar: about 6.8 peak sun hours a day on a fixed array tilted 32 degrees south. Sometimes the pole line wins. On a parcel half a mile from the nearest transformer, it usually does not.

The two steps everybody gets backwards

Grading before drainage planning. A level pad is easy. A level pad that sheds water away from the building in a monsoon cell that drops an inch in forty minutes is a design. Fifty-seven percent of the annual rainfall at Pearce–Sunsites arrives between July and September. Plan for that quarter of the year, not the other three.

Septic before well. The 100-foot separation is measured from the well, and the well location is constrained by geology and rig access in ways the drainfield is not. Site the well first, then place the septic around it. Doing it the other way means either a compromised well location or a redesigned drainfield.

What this costs, honestly

We are not going to print a per-acre number here, because the honest answer is that the range on a Cochise County parcel is enormous and driven by things you can find out in advance: caliche depth, mesquite density, driveway length, wash crossings, whether there is water on site, and how far the equipment has to travel.

What we will say is that the sequence above is the cheap part. Verification in Phase 1 costs almost nothing and routinely saves five figures. The expensive mistakes are all downstream of skipping it.

If you have a parcel and a folder of paperwork and you want somebody to walk it with you before you commit to a layout, that is a conversation we have most weeks.