Building permits, zoning and land rules 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 Organizations^1,10. 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 occupancy¹⁰. No building permit does not mean no rules: zoning, setbacks, septic and road access still apply^1,7,10,11. Inside city limits the picture differs: Paonia and Crawford each issue their own building permits^3,4.

Delta County Planning and Community Development is the first stop for zoning, property development, subdivisions, access and land-use applications¹². Reach the office at 970-874-2110 or planning@deltacountyco.gov, or visit 295 W. 6th Street, Delta, CO 81416¹². 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 hearing¹³. 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 Health^5,14. Published land-use fees include $500 for a Conditional Use Permit, $250 for a rezone and $250 for each requested variance¹⁴.

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 apply¹¹. 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 size⁸. 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 years⁸. 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 ditch¹⁰. A legal lot with a single-family home may have one accessory dwelling unit, no larger than the primary residence and not sold separately⁸. Ask Planning to identify the district and parcel history before you design the site¹².

Delta County Environmental Health processes septic permits for every structure with a restroom or sewer drain, anywhere in the county^5,7. 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 $600¹⁵. A site inspection and a final inspection are required, and final approval must come before occupancy⁵. Reach Environmental Health at 970-874-2165 or visit 255 West 6th Street, Delta, CO 81416¹⁶. 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 expectation¹⁷. 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 system¹⁸.

Delta County treats an RV as a dwelling unit only when it is connected to permanent water, wastewater and electricity¹. 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 occupancy¹². 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 site^6,19. 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 mind¹². 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 permit⁸.

1. Confirm the parcel is unincorporated, then ask Delta County Planning for its zoning district, plat notes and highway-overlay status^1,12.
2. Follow the published county sequence: confirm the application, gather documents, submit with fees, and complete staff review or any required hearing¹³.
3. Check that the site plan meets the district's lot standards and setbacks^8,10.
4. Secure legal access; each connection to a county, state or federal road needs a permit from the entity controlling the road¹¹.
5. Prove adequate water with a water tap or a state well permit, and make sure a well permit covers every dwelling it will serve¹.
6. Get an address, then obtain the septic permit and site inspection before construction^5,7.
7. Obtain state electrical and plumbing permits and, in either highway overlay district, the county building permit¹.
8. Complete the final septic inspection before occupancy⁵.

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 diligence¹⁷. 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 unit¹. 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 Commissioners¹. Compare the deed and map with the zoning district and its minimum lot size⁸. Check mapped flood hazards, since building or septic work in a floodway or floodplain may require a county permit¹⁰. Verify access, because every connection to a county, state or federal road needs approval from the entity controlling it¹¹.