Unincorporated Lake County, Colorado requires building permits and applies county zoning12. Community Planning & Development issues building permits and runs zoning for the county, and the city of Leadville handles its own345. Lake County administers septic permits6. RV camping is temporary7.
At a glance
- Building permit
- Required for county-regulated construction in unincorporated Lake County1
- Zoning
- Yes; county zoning applies outside Leadville, which zones its own land25
- Septic permit
- Required; Lake County administers OWTS permits89
- RV living while building
- Temporary only: 15 consecutive days; a permit pathway exists for some camping during development710
- Tiny home
- Most districts require occupied structures to be at least 600 square feet11
- Owner-builder exemption
- Narrow state exemption for repair or maintenance on the owner's property12
- Well permit
- Subdivision approval may be denied if state well permits are unavailable13
- Driveway permit
- Required for a connection to a public roadway and for specified driveway changes14
Who to call
Building permits
Lake County Community Planning & Development
Building, plumbing, mechanical, roofing and solar permits, plus Lake County planning, zoning, subdivision and other land-use matters
Septic permits
Lake County OWTS Environmental Health
OWTS contractor information, septic permits and inspection scheduling
Roads & driveways
Lake County Building Department / Road & Bridge
County driveway permits, construction questions and driveway inspections
505 Harrison Avenue, Leadville, CO 80461
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 Lake 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 Lake County, Colorado?
Yes. Unincorporated Lake County requires a building permit for construction, alteration, occupancy and use of buildings and other structures covered by the county permitting system1. Permit approval depends on the Land Development Code, adopted building codes and other county specifications15. A fee established by the Board of County Commissioners must accompany a land-use application, and added expert-review or state-agency charges can apply16. Before a new building can be occupied or an existing building's use can change, the County Chief Building Official must issue a certificate of occupancy17. For a building without centralized sewer, final septic inspection and approval are also conditions of occupancy17. Community Planning & Development is the practical starting point because the office administers building, plumbing, mechanical, roofing and solar permits for both Lake County and the City of Leadville3.
Who is the Lake County building department, and how do you reach it?
Lake County Community Planning & Development is the building and land-use office for unincorporated land. Inside Leadville, the city's own rules and Planning and Zoning Department apply to building permits and zoning approval4. For the county: call (719) 486-2875 or email buildingpermits@co.lake.co.us for building permits3. The same department administers county planning, zoning, subdivision and other land-use matters3. For land-use review, the county determines whether an application is complete within 10 days after filing; an incomplete filing receives a deficiency notice and does not proceed until corrected18. A preapplication meeting may be required18. Lake County has adopted the 2018 ICC reference codes with local amendments19.
Does Lake County, Colorado have zoning?
Yes. Lake County administers zoning and land-use regulation in unincorporated areas through its Land Development Code2. Inside Leadville, the city sets its own zoning districts5. Uses, setbacks, lot sizes and development requirements vary by district202122. Most Lake County zoning districts require an occupied structure to contain at least 600 square feet, which rules out many small tiny homes23. An accessory dwelling unit is allowed by right on a legal parcel greater than one acre only when the parcel meets the underlying zone's minimum lot size and other county requirements; other ADUs need conditional-use review, and camping units cannot serve as ADUs24. Height limits are district-specific; near the airport, the Airport Protection Overlay caps structures at 35 feet in some areas and 100 feet in others25. Manufactured homes are limited: non-qualified units are prohibited, parks are capped at 6 units per acre, and a single-wide may serve as a temporary residence only in specified districts after a building permit for a permanent home26. Ask Community Planning & Development to confirm the parcel's district, dimensional standards and any lot-coverage limit3.
How do septic permits work in Lake County?
Lake County administers OWTS septic permits and related inspections for every address in the county, Leadville included627. The Lake County Public Health Agency licenses the OWTS contractors6. A new-build permit costs $800 plus a processing fee27. A valid permit is required to install or repair a septic system, and every septic permit requires a licensed OWTS contractor928. New systems and major repairs require engineered design and multiple inspections, while smaller repair categories have separate requirements9. New builds and major repairs require tank-and-pipe and final-grade inspections, with at least 48 hours' notice to OWTS Environmental Health2728. Septic feasibility deserves attention before purchase because only about 0.5% of Lake County soils are rated without severe limits for a conventional drain field29.
Can you live in an RV or tiny home on your land in Lake County?
Camping is not an open-ended residence on unincorporated Lake County land. Primary-use camping must be allowed by the zoning district and requires a parcel greater than 5 acres; occupancy is limited to 15 consecutive days and 30 days in a six-month period107. Accessory camping allows no more than 1 camping unit per parcel; two or more units become a campground7. On a parcel under 5 acres, accessory camping requires an established primary use, but an owner who has applied for a building permit may pursue a temporary-use permit to camp during development10. Most tiny homes do not satisfy the 600-square-foot minimum occupied-structure size that applies in most Lake County zoning districts11. State-approved tiny homes may be used for long-term living on a permanent or temporary foundation, but local zoning and site requirements still apply30.
Building a home in Lake County: the steps, in order
- Ask Community Planning & Development to identify the parcel's zoning district, allowed residential use, setbacks and required land-use review320.
- Confirm that the lot was legally created; Lake County regulates subdivisions, and non-minor subdivisions generally should provide at least two means of access unless the Board approves an exception31.
- Resolve water and wastewater early: subdivision approval may be denied when Colorado Division of Water Resources well permits are unavailable, and an off-sewer project needs county OWTS approval1327. Subdivision lots within 400 feet of centralized water or sewer must connect when the operator is willing and able to serve them32.
- Have a licensed OWTS contractor prepare the septic submission; new construction requires engineered design928.
- Submit the building-permit package and fee, correcting any completeness deficiencies before review continues118.
- Obtain the driveway permit, complete required inspections and secure final OWTS approval and a certificate of occupancy before moving in143317.
What should you check before buying land in Lake County?
Start with buildability rather than acreage alone: only 24.4% of Lake County land is at a slope of 15% or less, and only about 0.5% of soils are rated without severe limitations for a conventional septic drain field3429. Confirm zoning, legal access, driveway geometry, water and septic before closing2014359. If rental income matters, unincorporated Lake County requires a short-term-rental license, while the City of Leadville uses a separate process36. Check mapped flood conditions because regulated floodplain development must meet local standards at least as strict as federal minimum criteria37. About 77.2% of Lake County is federal land, so verify that apparent access across neighboring ground is legally documented38. The effective property-tax rate is about 0.4%, the median annual property-tax bill is about $1,544 and the typical home-insurance premium is about $1,858 per year394041.
Watch-outs
- Primary-use camping in unincorporated Lake County requires a parcel greater than 5 acres and remains temporary10.
- Only about 0.5% of Lake County soils are rated without severe limitations for a conventional septic drain field, so make septic feasibility a purchase contingency29.
- Lake County driveway inspections cannot be performed from October through May, and the final driveway inspection must be complete before a certificate of occupancy is issued14.
- Colorado's owner exemption covers repair or maintenance on the owner's property, not a general exemption for constructing a new home42.
Sources
- Chapter 3: Development Review & Approval Procedures, quoted and re-checked
- Community Planning & Development, quoted and re-checked
- Lake County Community Planning & Development (lakecountyco.gov)
- Leadville: Leadville Code 15.04.030 - Amendment to 2018 International Residential Code (Lake County), quoted and re-checked
- Leadville: Leadville Code 17.48.010 - Designated (Table 1 uses by zoning district) (Lake County), quoted and re-checked
- Community Planning & Development, quoted and re-checked
- lakecountyco.gov, quoted and re-checked
- Septic System Permitting | Lake County, CO (2026 county census)
- Septic System Permitting, quoted and re-checked
- lakecountyco.gov, quoted and re-checked
- lakecountyco.gov, quoted and re-checked
- Colorado Revised Statutes 2026, Title 30, § 30-11-125 (2026 county census)
- Chapter 6 Development Standards - 2025 LCLDC, quoted and re-checked
- Driveway Permit, quoted and re-checked
- Chapter 3: Development Review & Approval Procedures (2026 county census)
- Chapter 3: Development Review & Approval Procedures, quoted and re-checked
- Chapter 3: Development Review & Approval Procedures, quoted and re-checked
- Land Use, quoted and re-checked
- Building Code Adoption & Resolution, quoted and re-checked
- Land Development Code, quoted and re-checked
- Chapter 4 District Regulations, quoted and re-checked
- Chapter 4 District Regulations, quoted and re-checked
- lakecountyco.gov, quoted and re-checked
- Chapter 5: Use Regulations, quoted and re-checked
- Chapter 4: District Regulations, quoted and re-checked
- lakecountyco.gov, quoted and re-checked
- Septic System Permitting | Lake County, CO, quoted and re-checked
- Lake County OWTS Environmental Health (lakecountyco.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
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Community Planning & Development, quoted and re-checked
- lakecountyco.gov, quoted and re-checked
- Septic System Permitting, quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Water Administration (Colorado statewide rule), quoted and re-checked
- Community Planning & Development, quoted and re-checked
- SB24-179 Floodplain Management Program (Colorado statewide rule), quoted and re-checked
- Federal land share: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Typical home insurance premium: Bolthole Index county data
- Colorado Revised Statutes 2026, Title 30, § 30-11-125 (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.