Unincorporated Delta County, Colorado generally does not require a county building permit, except in the Highway 92 and Highway 50 Overlay Districts1. Zoning on unincorporated land comes from the county Land Use Code, while the Town of Paonia sets its own zoning and Paonia and the Town of Crawford issue their own building permits234. Septic permits for every address in the county come from Delta County Environmental Health5.
At a glance
- Building permit
- Generally not required in unincorporated areas; required in the Highway 92 and Highway 50 Overlay Districts1
- Zoning
- Yes; the county Land Use Code governs unincorporated land6
- Septic permit
- Required for every structure with a restroom or sewer drain; issued by county Environmental Health7
- RV living
- Conditional; a principal RV residence needs permanent power, water and sewer or a permitted septic system89
- Manufactured home
- Allowed with utilities, septic approval and a state installation permit10
- Accessory dwelling
- One per legal lot, no larger than the main home11
- Owner-builder exemption
- State exemption covers only repair or maintenance on the owner's property; no county new-home exemption confirmed12
- Well
- A domestic well or spring requires a state Division of Water Resources permit13
Who to call
Building permits
Delta County Planning and Community Development
Land use, zoning, development applications, subdivisions, access, addressing and floodplain questions for unincorporated Delta County
295 W. 6th Street, Delta, CO 81416
Septic permits
Delta County Environmental Health Services
Septic systems, drinking water, water quality and other environmental health services in Delta County
255 West 6th Street, Delta, CO 81416
Contact details are copied from each office’s official page and were checked against it on October 16, 2026.
Off-grid gear
Going off-grid in Delta County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
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Do you need a building permit in Delta County, Colorado?
Most construction in unincorporated Delta County does not require a county building permit; development in the Highway 92 Overlay and the Highway 50 Overlay requires one1. Delta County has not adopted building codes for unincorporated areas, so county building inspections are not part of ordinary construction, but state electrical and plumbing permits are still required through the Division of Professions and Organizations1415. The county issues no certificates of occupancy for unincorporated construction; in the two overlay districts, the county asks for a Certificate of Inspection Completion, which is not identified as a certificate of occupancy16. No building permit does not mean no rules: zoning, setbacks, septic and road access still apply1718719. Inside city limits the picture differs: Paonia and Crawford each issue their own building permits34.
Who handles Delta County building and land-use permits?
Delta County Planning and Community Development is the first stop for zoning, property development, subdivisions, access and land-use applications20. Reach the office at 970-874-2110 or planning@deltacountyco.gov, or visit 295 W. 6th Street, Delta, CO 8141620. The county has no general building-permit program for unincorporated land1. The published process is to contact Planning, confirm which application or review applies, gather documents, submit the application with fees, and then go through staff review and any required hearing21. Applications for property inside an incorporated city or town go to the municipality, not the county, though septic permits for every address in the county come from Delta County Environmental Health225. Published land-use fees include $500 for a Conditional Use Permit, $250 for a rezone and $250 for each requested variance22.
Does Delta County have zoning?
Yes. Delta County's Land Use Code, also called zoning, guides how unincorporated land is used and developed, and applications submitted after February 21, 2024 fall under the updated code6. Municipalities may run separate rules inside their limits; the Town of Paonia, for one, zones by district under its own municipal code2. Published county districts include A35, A20, A5, RI/C, A-2.5 and RES-1.0, and overlays or site-specific rules may also apply23. Minimum lot sizes for newly created lots run from 35 acres in A35 down to 1 acre in RES-1.0; lawfully created older lots stay conforming whatever their size24. The county may approve a nonconforming new lot only if the subdivision meets the other Code requirements and the final plat bars further variance for at least 10 years24. Standard setbacks are 25 feet from a road right-of-way, 15 feet from interior property lines (5 feet for some non-habitable accessory structures at the Director's discretion), 50 feet from a waterway and 25 feet from an open unlined irrigation ditch18. A legal lot with a single-family home may have one accessory dwelling unit, no larger than the primary residence and not sold separately11. Ask Planning to identify the district and parcel history before you design the site20.
How do septic permits work in Delta County?
Delta County Environmental Health processes septic permits for every structure with a restroom or sewer drain, anywhere in the county57. The parcel needs an address first; then the septic application and an engineer's design go to Environmental Health, and a conditional permit is issued before construction begins7. The published residential fee for installing or replacing the tank and soil treatment area is $60025. A site inspection and a final inspection are required, and final approval must come before occupancy26. Reach Environmental Health at 970-874-2165 or visit 255 West 6th Street, Delta, CO 8141627. Only about 4.3% of Delta County soils are rated not limited for a conventional drain field, so a site evaluation is a sensible purchase contingency and an engineered system is a realistic expectation28. Colorado requires adequate sanitary sewage disposal for any occupied structure, so an off-grid plan still needs an approved sanitation path, and we could not confirm whether the county accepts alternatives to a permitted septic system29.
Can you live in an RV or tiny home in Delta County?
Delta County treats an RV as a dwelling unit only when it is connected to permanent water, wastewater and electricity9. A principal RV residence in unincorporated Delta County needs permitted power, water, and either sewer or a permitted septic system8. During construction, the property owner or constructing contractor may occupy an RV for up to 24 months while an active plumbing or electrical permit remains in place; permanent infrastructure removes that time limit8. We could not confirm a separate rule for recreational camping on private land, so ask Planning before relying on an RV stay that is neither a principal residence nor construction occupancy20. Colorado-approved tiny homes may be used for long-term living, but plans need state approval before construction and county zoning still applies to the site306. We could not confirm a county-specific tiny-home rule or a minimum dwelling size, so ask Planning about zoning, utilities and setbacks for the unit you have in mind20. A manufactured home is allowed if it is safe and fit for residential use, sits at least 10 feet from any other structure, has approved utility connections and septic approval, and is installed under the state Manufactured Home Installation Program with a certified inspector and permit10.
Building a home in Delta County: the steps, in order
- Confirm the parcel is unincorporated, then ask Delta County Planning for its zoning district, plat notes and highway-overlay status201.
- Follow the published county sequence: confirm the application, gather documents, submit with fees, and complete staff review or any required hearing21.
- Check that the site plan meets the district's lot standards and setbacks3118.
- Secure legal access; each connection to a county, state or federal road needs a permit from the entity controlling the road19.
- Prove adequate water with a water tap or a state well permit, and make sure a well permit covers every dwelling it will serve913.
- Get an address, then obtain the septic permit and site inspection before construction726.
- Obtain state electrical and plumbing permits and, in either highway overlay district, the county building permit14.
- Complete the final septic inspection before occupancy26.
What should you check before buying land in Delta County?
Start with wastewater: only about 4.3% of Delta County soils are rated not limited for a conventional drain field, which makes a septic site evaluation central to due diligence28. Water comes next: a development application needs proof of adequate water, and a domestic well or spring needs a state permit that covers the proposed use, including any secondary unit913. Confirm the parcel was created legally, because splitting it is regulated: a two-lot minor plat gets administrative review, while a split into 3 or more lots goes to the Planning Commission and the Board of County Commissioners32. Compare the deed and map with the zoning district and its minimum lot size3124. Check mapped flood hazards, since building or septic work in a floodway or floodplain may require a county permit33. Verify access, because every connection to a county, state or federal road needs approval from the entity controlling it19.
Watch-outs
- A parcel in the Highway 92 or Highway 50 Overlay District needs a building permit even though most unincorporated Delta County construction does not1.
- A county-road access permit is required, and direct access onto a Colorado state highway needs a separate state access permit1934.
- A well permit must include water for the proposed use, such as a second dwelling, so size the permit for an accessory unit before you drill13.
- Colorado's owner exemption applies only to repair or maintenance on the owner's property under a county contractor-licensing program; it does not establish an exemption for building a new home12.
Sources
- deltacountyco.gov, quoted and re-checked
- Town of Paonia: Paonia Municipal Code Sec. 16-1-80 Application of regulation (Delta County), quoted and re-checked
- Town of Paonia: Paonia Municipal Code Sec. 18-2-30 Amendments (Residential Code) (Delta County), quoted and re-checked
- Town of Crawford: Crawford Municipal Code Sec. 18-1-30 Building permits—Variances—Enforcement (Delta County), quoted and re-checked
- Water/Wastewater, quoted and re-checked
- Land Use Regulations, quoted and re-checked
- Water/Wastewater, quoted and re-checked
- 2024 Delta County Land Use Code, quoted and re-checked
- Water/Wastewater, quoted and re-checked
- 2024 Delta County Land Use Code, quoted and re-checked
- 2024 Delta County Land Use Code, quoted and re-checked
- Colorado Revised Statutes 2026, Title 30, § 30-11-125 (2026 county census)
- Water/Wastewater, quoted and re-checked
- deltacountyco.gov, quoted and re-checked
- Building/Land Use/Subdivision, quoted and re-checked
- Building/Land Use/Subdivision, quoted and re-checked
- Land Use Regulations, quoted and re-checked
- 2024 Delta County Land Use Code, quoted and re-checked
- deltacountyco.gov, quoted and re-checked
- Delta County Planning and Community Development (deltacountyco.gov)
- Planning and Community Development, quoted and re-checked
- Land Use Forms & Applications, quoted and re-checked
- 2024 Delta County Land Use Code, quoted and re-checked
- 2024 Delta County Land Use Code, quoted and re-checked
- Building/Land Use/Subdivision, quoted and re-checked
- Water/Wastewater, quoted and re-checked
- Delta County Environmental Health Services (deltacountyco.gov)
- 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
- content.leg.colorado.gov (Colorado statewide rule), quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Land Use Regulations, quoted and re-checked
- Building/Land Use/Subdivision, quoted and re-checked
- Building/Land Use/Subdivision, quoted and re-checked
- Access Permits | Frequently Asked Questions (Colorado statewide rule), 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.