Building permits, zoning and land rules in Cochise County, Arizona

At a glance

Building permit

Required for new residential construction in unincorporated areas¹⁶

County zoning

Yes; every parcel is assigned one of 34 zoning districts⁷³

Septic permit

Issued by the County Health Department on behalf of ADEQ⁴⁸

Owner-builder

Available in qualifying rural zoning districts, once every 5 years⁵⁹

RV living

Limited to 6 months a year with an existing home, and a permit is required¹⁰

Tiny homes

Allowed anywhere a single-family home is allowed¹¹

Floodplain permit

Required in mapped flood areas; $150 or $65 depending on hydrology study¹²

Who to call

Contact details are copied from each office’s official page and were checked against it on October 16, 2026.

Do you need a building permit in Cochise County, Arizona?

Yes. Unincorporated Cochise County requires a residential building permit to construct a new residential structure, and applications and plan submittals are completed online through the County's permitting portal⁶. The property must meet zoning requirements and residential use must be allowed before the County will issue the permit, and construction may start only after the permit is posted⁶. Depending on your site, you may also need floodplain, stormwater/drainage, access/driveway, septic or sewer, well, or fire-district approvals alongside the building permit itself⁶. Reach the Building Safety Division at Development Services for what your specific project needs¹³.

Who is the Cochise County building department, and how do you reach them?

Cochise County Development Services, at 1415 Melody Lane, Building F, in Bisbee, is the Building Safety Division that issues residential building permits for unincorporated land¹³. Inside Douglas, the city issues its own building permits and sets its own zoning¹⁴¹⁵; septic permits for every Cochise County address still come from the County Health Department¹⁶. Permit fees are published in the County's Development Services Fee Schedule, and online calculators estimate project costs separately from septic, right-of-way and floodplain fees¹⁷. Required inspections appear on the permit or inspection record card and are requested through the County portal; a final inspection closes the permit, and an eligible project may receive a Certificate of Occupancy after its required final inspections and verification of minimum requirements¹⁸¹⁹. Qualifying owner-builders have two paths, but all construction must still comply with County Building Safety Codes and zoning requirements²⁰. Option 1 keeps County plan review and key mechanical, electrical, plumbing and fire-prevention inspections²¹. Only Option 1 can receive a conditioned Certificate of Occupancy, and only once the dwelling is complete for occupancy and every required inspection is done and approved²². That certificate confirms a review of minimum life-safety elements, not full code compliance, so a lender, insurer or future buyer may ask for more documentation²³. If the house sits in a regulatory floodplain or FEMA special flood hazard area, a FEMA Elevation Certificate is also required before the certificate issues²². Option 2 has no County construction-plan review or building inspections and cannot receive a Certificate of Occupancy²⁴.

Does Cochise County have zoning, and what does that mean for your land?

Yes. The Planning and Zoning Division administers zoning and subdivision rules throughout unincorporated Cochise County; incorporated municipalities may administer their own rules²⁵². Every unincorporated parcel has one of 34 zoning designations, and published residential and rural minimum lot sizes range from 8,000 square feet to 36 acres depending on the district²⁶. Setbacks, lot coverage and allowable building height also vary by parcel, so use the zoning map or request a verification letter before laying out a project^27282930. Dividing land is regulated too: the applicable minor-land-division or subdivision process depends on how many parcels are created and their sizes³¹. Commercial agriculture is not a blanket escape from county rules: a zoning exemption can apply to a tract of at least 5 contiguous commercial acres used for crops or livestock, but septic, right-of-way, subdivision, floodplain and manufactured-home installation requirements remain³².

How do septic and well permits work in Cochise County?

All septic and alternative onsite wastewater systems in Cochise County are reviewed and permitted by the County Health Department, which holds delegated authority from ADEQ, rather than the state agency itself¹⁶⁸. A soil and site evaluation must be completed before you apply, and applications are processed through Cochise Health and Social Services³³. If you ever sell a home on septic, the seller must hire a certified inspector to perform a transfer-of-ownership inspection within six months before the sale closes, and the buyer must submit a completed Notice of Transfer and pay the fee within 15 calendar days after transfer³⁴. Composting toilets and other alternative systems can be approved, but typically only where site conditions such as high groundwater support that design, and a composting toilet doesn't eliminate the need for an approved system to handle kitchen and sink drain water³⁵. Soils are a real constraint here: only about 12.3% of Cochise County's soils carry no severe limitations for a conventional septic drain field³⁶. For wells, a parcel of five acres or less needs an Environmental Health Department well review permit in conjunction with the state (ADWR); larger parcels are reviewed by ADWR alone. Wells must sit at least 5 feet from property lines and at least 100 feet from septic-system components³⁷.

Can you live in an RV or tiny home on your land in Cochise County?

Long-term RV living has real limits here. Cochise County allows temporary occupancy of one RV only in connection with an existing principal use, such as a house, or one under construction under an approved building permit, and that occupancy is capped at six months in a calendar year when there's already a home on the property¹⁰. A stay of 15 consecutive days or less tied to a permitted principal use doesn't need a separate temporary-use permit, but longer stays do, and the RV may not be rented out¹⁰. Camping isn't allowed on vacant land at all — the County requires a house or some other established use on the property before any camping, in an RV or otherwise, is permitted³⁸. Tiny homes are a different, more settled answer: Cochise County permits tiny homes as single-family dwellings anywhere a single-family home is allowed under the parcel's zoning, provided the home meets applicable building-code, sewer or septic, and water-supply requirements¹¹. A manufactured or rehabilitated mobile home can also serve as an accessory dwelling unit, but only in the zoning districts where that's a permitted use and only alongside an existing single-family home and the County's other ADU standards³⁹.

How do you build a home in Cochise County, step by step?

1. Get a zoning verification letter or check the County zoning map to confirm your parcel's district, allowed use, lot size, setbacks, coverage and height standards before designing^30272829.
2. If you plan to build it yourself, check whether your parcel qualifies for the Owner-Builder Amendment; it generally requires a zoning district allowing one dwelling per four acres or larger, and an individual can use it once every 5 years⁹.
3. Apply online for your residential building permit through the County's permitting portal once your plans are ready¹³⁴⁰.
4. Apply for a septic permit through the County Health Department, or a well-review permit through Environmental Health if your parcel is five acres or less¹⁶³³³⁷.
5. If your lot lies within a mapped floodplain, get a Floodplain Use Permit before construction begins, and be ready to elevate the lowest floor at least 1 foot above the base flood water surface elevation⁴¹¹².
6. If you need driveway access across a county-maintained road ditch, get a right-of-way permit from the Engineering & Natural Resource Department before installing a culvert⁴¹⁴².
7. Schedule each required inspection through the County portal as you build, and complete the final inspection to close the permit and obtain a Certificate of Occupancy if the project is eligible; owner-builders on Option 1 also need a FEMA Elevation Certificate first if the house is in a floodplain¹⁹²².

What should you check before buying land in Cochise County?

Cochise County farmland runs about $2,695 an acre, with a typical home value around $264,829⁴³⁴⁴. This is dry country: annual precipitation is only about 14 inches, and severe drought has hit roughly 36.5% of years, so water planning matters⁴⁵⁴⁶. The land is fairly gentle, with about 71.9% at 15% slope or less, but lightly wooded at just 13.8%⁴⁷⁴⁸. Federal land covers a notable 26.3% of the county, which can affect what adjoins a parcel and how it is accessed⁴⁹. Population density is about 20.1 people per square mile, and the nearest city of 100,000 or more is about 67 miles from the county's center⁵⁰⁵¹. Property taxes run an effective rate near 0.6%, with a median annual bill around $1,325⁵²⁵³. Before you close, get a zoning verification letter for the exact parcel³⁰, check floodplain status on the County's interactive map and confirm with Engineering if you're unsure⁴¹, and budget for a site evaluation given that only about 12.3% of soils here are free of severe septic drain-field limitations³⁶.

Watch-outs

• Cochise County's former tiny-home rule set a 296-square-foot minimum under the 2018 residential code, but we could not confirm that minimum continues under the 2024 code now in effect; ask Building Safety which standard applies to a new tiny-home application⁵⁴¹³.
• Whether short-term rentals are allowed, limited or prohibited in unincorporated Cochise County was not confirmed on an official source; ask Development Services before you plan on one³⁰.
• No countywide requirement to connect to public water or sewer was confirmed; wells, cisterns and community water systems all appear in County materials as options, so confirm what's available for a specific parcel¹⁶.
• RV occupancy tied to an existing home is capped at 6 months a year and requires a permit beyond 15 days; camping is not allowed on land with no house or other established use at all, so a bare lot isn't a place to park and live while you plan a build¹⁰³⁸.

Sources

1. Residential Projects (2026 county census)
2. Development Services, quoted and re-checked
3. Summary of Zoning Districts, quoted and re-checked
4. Our Services (2026 county census)
5. Owner Builder Amendment (2026 county census)
6. Residential Projects, quoted and re-checked
7. Development Services (2026 county census)
8. Our Services, quoted and re-checked
9. Owner Builder Amendment, quoted and re-checked
10. Development Services Code Compliance FAQs, quoted and re-checked
11. Tiny Houses, quoted and re-checked
12. Developing Your Floodplain Property, quoted and re-checked
13. Cochise County Development Services — Building Safety Division (cochise.az.gov)
14. Douglas: Building Safety and Planning and Zoning FAQs (Cochise County), quoted and re-checked
15. Douglas: Planning & Zoning (Cochise County), quoted and re-checked
16. Cochise County Health Department — Environmental Health Services (cochise.az.gov)
17. Frequently Asked Questions - Development Services Building Safety, quoted and re-checked
18. Residential Projects, quoted and re-checked
19. Residential Projects, quoted and re-checked
20. Owner Builder Amendment, quoted and re-checked
21. Owner Builder Amendment, quoted and re-checked
22. Owner Builder Amendment, quoted and re-checked
23. Owner Builder Amendment, quoted and re-checked
24. Owner Builder Amendment, quoted and re-checked
25. cochise.az.gov, quoted and re-checked
26. Summary of Zoning Districts, quoted and re-checked
27. Planning & Zoning Division, quoted and re-checked
28. Planning & Zoning Division, quoted and re-checked
29. Planning & Zoning Division, quoted and re-checked
30. Cochise County Planning & Zoning Division (cochise.az.gov)
31. Subdividing Property, quoted and re-checked
32. Agricultural Exemptions & Agritourism, quoted and re-checked
33. Septic Systems, quoted and re-checked
34. Inspection and Notice of Transfer, quoted and re-checked
35. Cochise County FAQs, quoted and re-checked
36. Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
37. Well Review Permit, quoted and re-checked
38. cochise.az.gov, quoted and re-checked
39. Accessory Dwelling Units — Restrictions, quoted and re-checked
40. Residential Projects, quoted and re-checked
41. Cochise County Engineering & Natural Resource Department (cochise.az.gov)
42. cochise.az.gov, quoted and re-checked
43. Farmland value per acre (USDA census): Bolthole Index county data
44. Typical home value (Zillow): Bolthole Index county data
45. Annual precipitation: Bolthole Index county data
46. Share of years in severe drought: Bolthole Index county data
47. Share of land at 15% slope or less: Bolthole Index county data
48. Wooded share of land: Bolthole Index county data
49. Federal land share: Bolthole Index county data
50. Population density: Bolthole Index county data
51. Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
52. Effective property tax rate: Bolthole Index county data
53. Median property tax bill: Bolthole Index county data
54. FAQs - Cochise County, quoted and re-checked

Written October 16, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.