Unincorporated Park County, Colorado requires a building permit and staged inspections from the Park County Building Department, and it zones its land; the towns of Fairplay and Alma fall outside that department and set their own zoning12345. Park County Environmental Health issues septic permits, which must come before the building-permit application when a home has no sewer service67. Applications go through CloudPermit83.
At a glance
- Building permit
- Required; the county handles construction outside Fairplay and Alma, and starting early doubles the fee193
- Zoning
- Yes in unincorporated Park County; Fairplay and Alma zone their own land101145
- Septic permit
- Required before a building permit for a home without sewer service; county Environmental Health issues it612
- RV and camping
- Vacant residential and mining parcels allow limited camping, with permits required for longer stays13
- Tiny home
- Colorado approval and local zoning compliance are required for long-term residential use14
- Minimum home size
- No county minimum square-footage requirement is stated, but building-code and zoning rules still apply15
- Owner-builder
- Allowed, with resale and one-dwelling-per-four-years restrictions16
- Accessory dwelling
- An ADU is permitted on lots of two acres or larger; smaller-lot units are treated as guest houses17
Who to call
Building permits
Park County Building Department
Building permits and building inspections for Park County except the towns of Fairplay and Alma
856 Castello Ave, P.O. Box 517, Fairplay, CO 80440
Zoning
Park County Planning and Zoning
Planning and zoning questions and development review
856 Castello Ave, P.O Box 1598, Fairplay, CO 80440
Septic permits
Park County Environmental Health
Septic permits, site evaluation and septic inspections
856 Castello Ave, P.O. Box 216, Fairplay, CO 80440
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 Park 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.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Park County, Colorado?
Yes. Unincorporated Park County requires a building permit to erect, construct, enlarge, alter, repair, move, remove, convert or demolish a building or structure18. The county has adopted the 2018 International Residential and Building Codes, among others, and the Building Department handles permits and inspections everywhere except the towns of Fairplay and Alma193. Detached one-story storage sheds up to 200 square feet, fences up to 6 feet and non-structural retaining walls up to 4 feet need no building permit, but they must still meet Park County land use regulations20. At least 50% of the permit fee is due when plans are submitted, and starting construction before the permit issues brings a double fee9. A development permit is valid for 1 year from issuance and may be voided if work lapses or inspections are skipped21. Owner-builders are allowed, but the dwelling cannot be offered for sale until its Certificate of Occupancy issues, and an owner-builder may build only one dwelling every four years22.
Who issues Park County building permits, and how do you reach them?
The Park County Building Department issues building permits and performs building inspections outside Fairplay and Alma3. The office is at 856 Castello Ave, P.O. Box 517, Fairplay, CO 80440, phone 719-836-42553. Owners and contractors submit applications and request inspections through CloudPermit, and incomplete applications are rejected83. Inspections must be scheduled no later than 5:00 p.m. the day before, and final inspection happens only after the state has approved electrical and plumbing23. Planning and Zoning handles land-use questions at 856 Castello Ave, P.O Box 1598, Fairplay, CO 80440, 719-836-429224. Environmental Health handles septic work and works with landowners on driveway permits from 856 Castello Ave, P.O. Box 216, Fairplay, CO 80440, 719-836-4267725. The county Building Department does not cover parcels inside Fairplay or Alma, so those parcels need the applicable town office3. We could not confirm who issues building permits or septic approvals inside either town, so ask the town and Environmental Health before you buy there.
Does Park County have zoning?
Yes. The unincorporated areas of Park County are divided into zone districts, each with its own use and development standards1011. Inside Fairplay and Alma, the towns administer their own zoning rather than the county45. The county rules below apply to unincorporated land. Park County states no minimum square-footage requirement for a residence, but residential building height is generally capped at 35 feet1526. In the Residential Zone District, principal and accessory structures have setbacks of 50 feet from watercourses, wetlands and state or federal highway rights-of-way; 30 feet from other road rights-of-way and side lot lines; and 20 feet from rear lot lines27. New residential lots have a slope-based minimum area: 5 acres when at least half the lot has a slope of 20% or less, 6 acres when more than half is at a 20% to 30% slope, and 8 acres when more than half exceeds a 30% slope28. Ask Planning and Zoning to identify the parcel's mapped district and applicable schedule before designing the site1124.
How do septic permits work in Park County?
Park County Environmental Health administers onsite wastewater treatment system permits and inspections, and the county code addendum places the regulations under Development Services2912. Septic permits for unincorporated land stay with the county. For a building with plumbing that lacks sewer service, obtain the septic permit before applying for the building permit6. Final inspection is required before backfilling, and occupancy approval for a building without sewer service waits for the local agency's final OWTS inspection and approval30. Only 4.9% of Park County soils are rated without severe limitations for a conventional drain field, so make the site evaluation an early feasibility step and expect that many parcels may need a more involved design31. Off-grid does not mean sanitation-free: buildings used for sleeping must have sanitation facilities and running water, and a composting or incinerating toilet may handle toilet waste only when an OWTS treats the remaining wastewater3233. Where a municipality or special district provides public sewer, an OWTS permit is generally unavailable unless sewer connection is not feasible32.
Can you live in an RV or tiny home on land in Park County?
On a vacant MR, R, R-20, R-35 or Mining M parcel without a permitted dwelling, an owner may camp for up to 14 cumulative days per calendar year without a permit; a permit can allow up to 30 consecutive days, subject to wastewater, setback, access and other conditions13. Park County campgrounds and RV parks cannot allow full-time or permanent residential occupation of a campsite, camper, trailer or RV, apart from one caretaker or operator dwelling34. Those rules do not establish permanent RV residence on every private parcel, so ask Planning and Zoning before treating an RV as a home1324. A tiny home intended for long-term living needs Colorado Division of Housing plan approval before construction, compliance with state standards and local zoning, and site-specific certification14. Park County has no minimum residential square footage, but that does not waive zoning, building permits or septic review153516. An ADU is permitted on a lot of at least 2 acres; on a smaller lot, Park County treats the unit as a guest house17.
How do you build a home in Park County, step by step?
- Ask Planning and Zoning to confirm the parcel's mapped district, allowed residential use, setbacks, minimum lot standard and any separate land-use approval11272824.
- Confirm legal access and the driveway location; Park County requires a driveway permit before construction, and Environmental Health works with landowners to obtain it; direct access to a state highway also requires a Colorado Department of Transportation access permit362537.
- If the property needs a well, obtain the Colorado Division of Water Resources permit before drilling38.
- For a home with plumbing and no sewer service, obtain the Park County septic permit before applying for the building permit67.
- Submit complete building plans and the application through CloudPermit, and pay at least half the building-permit fee at plan submittal98.
- Wait for permit issuance before starting, because beginning early doubles the fee, then request inspections through CloudPermit as construction advances93.
What should you check before buying land in Park County?
Start with jurisdiction and zoning: verify whether the parcel is outside Fairplay or Alma, then have Planning and Zoning confirm its mapped district, allowed use, setbacks and slope-based lot standard3112728. Treat septic feasibility as a purchase contingency because only 4.9% of county soils are rated without severe limitations for a conventional drain field31. Check slope and clearing costs too: 33.3% of Park County land is at a slope of 15% or less, while 45.4% is wooded4041. Confirm legal access and whether the approach meets a county road, private road or state highway3637. A new groundwater well needs a state permit, so resolve water availability and permit conditions before assuming a well is viable38. Ask Planning and Zoning which flood review applies because the county's full floodplain-development rule could not be confirmed3524. If rental income matters, all Park County short-term rentals require a license and an online application with supporting property, septic, occupancy, parking, trash and snow-removal materials42. A parcel of 35 acres or larger can be created without county subdivision approval, but it remains subject to county zoning, setback, height, road and building-permit rules43.
Watch-outs
- Starting construction before the building permit issues brings a double fee, and at least half the permit fee is due at plan submittal9.
- Only 4.9% of Park County soils are rated without severe limitations for a conventional septic drain field, so septic feasibility can decide whether a parcel works for a home31.
- Vacant residential and mining parcels allow only limited camping, and Park County campgrounds and RV parks cannot provide permanent RV residence except for a caretaker or operator dwelling1334.
- An owner-builder may build only one dwelling every four years after the Certificate of Occupancy and cannot offer it for sale before that certificate issues16.
- Occupying a new structure before the Certificate of Occupancy issues is a code violation, and final inspection waits for state electrical and plumbing approval and for septic and driveway permits to be closed out39.
- Like the counties around it in Colorado, Park County requires a county building permit1.
Sources
- Park County 2018 Building Code Resolution and Local Amendments (2026 county census)
- Building, quoted and re-checked
- Park County Building Department (parkcountyco.gov)
- Town of Fairplay: Fairplay Municipal Code Sec. 16-26-20 Definitions (Park County), quoted and re-checked
- Town of Alma: Alma Municipal Code Sec. 16-1-70 Application of regulations (Park County), quoted and re-checked
- parkcountyco.gov, quoted and re-checked
- Park County Environmental Health (parkcountyco.gov)
- Building, quoted and re-checked
- Park County Development Services, quoted and re-checked
- Park County Land Use Regulations, Article V, quoted and re-checked
- Land Use Regulations, quoted and re-checked
- Environmental Health, quoted and re-checked
- Article V – Zoning and Use Regulations, quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Park County Frequently Asked Questions, quoted and re-checked
- Park County Frequently Asked Questions, quoted and re-checked
- Article V – Zoning and Use Regulations, quoted and re-checked
- Park County Development Services, quoted and re-checked
- Building FAQs, quoted and re-checked
- Park County Development Guide, quoted and re-checked
- Park County Development Services, quoted and re-checked
- Building FAQs, quoted and re-checked
- Park County Development Guide, quoted and re-checked
- Park County Planning and Zoning (parkcountyco.gov)
- Environmental Health, quoted and re-checked
- Park County Frequently Asked Questions, quoted and re-checked
- parkcountyco.gov, quoted and re-checked
- parkcountyco.gov, quoted and re-checked
- Environmental Health (2026 county census)
- Park County On-Site Wastewater Treatment System Regulations, quoted and re-checked
- 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
- Building FAQs, quoted and re-checked
- Building FAQs, quoted and re-checked
- parkcountyco.gov, quoted and re-checked
- Land Use Regulations, quoted and re-checked
- Development Guidelines, quoted and re-checked
- Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
- parkcountyco.gov, quoted and re-checked
- Park County Development Services, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Wooded share of land: Bolthole Index county data
- Short-Term Rentals, quoted and re-checked
- Article VI — Subdivision Regulations, 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.