Unincorporated Archuleta County, Colorado requires a county building permit for a home, issued by the Archuleta County Building Department.12 County zoning applies outside town limits, while the Town of Pagosa Springs sets its own zoning.34 Septic permits come from the county Water Quality Department throughout the county, not from the Building Department.5
At a glance
- Building permit
- Required in unincorporated Archuleta County1
- Zoning
- County zoning in unincorporated areas; the Town of Pagosa Springs zones its own land34
- Septic
- County Water Quality Department permit; no permit where public sewer is provided and feasible56
- Minimum lot size
- Set by zone district: 160 acres (AF) down to 3 acres (RR) and 8,000 sq ft (R)7
- Minimum residence size
- 400 square feet, excluding covered porches, patios and decks8
- Tiny house
- Regulated under Appendix Q of the residential code9
- Floodplain
- Floodplain Development Permit for any development in the floodplain10
- Private well
- A Colorado well permit is required for every new groundwater well11
Who to call
Building permits
Archuleta County Building Department
Building permits, plan review, inspections and certificates of occupancy
1122 Hwy. 84, P.O. Box 1507, Pagosa Springs, CO 81147
Septic permits
Archuleta County Water Quality Department
Onsite wastewater treatment system applications, design review and inspections
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 Archuleta 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 Archuleta County, Colorado?
Yes. Residential construction in unincorporated Archuleta County requires a county building permit.1 Like the counties around it in Colorado, Archuleta County requires a county building permit12.
Exemptions are narrow. The Building Department's current page says one-story detached storage buildings up to 120 square feet can be built without a permit and that an addition to an existing building needs one, while the 2024 residential packet allows detached accessory buildings up to 200 square feet; plan around the lower figure until the office confirms.131 Reroofing or residing 25% or more of the surface also needs a permit.13 Starting work without a required permit brings a fine equal to 100% of the permit fee.1
The county has adopted amended building codes, and permitted residential work gets inspections at footing, stem wall, rough framing and mechanical, insulation and final stages.1415 A single-family dwelling needs a certificate of occupancy, and using it before issuance carries a $100-per-day fine.16
Who issues building permits in Archuleta County, and who handles septic?
The Archuleta County Building Department issues building permits for a house, addition or other code-regulated construction in unincorporated Archuleta County. Call 970-264-1390 or visit 1122 Hwy. 84 in Pagosa Springs before preparing the application.2 Inside the Town of Pagosa Springs, the town sets its own zoning; we could not confirm who issues building permits there, so ask the town before assuming county rules apply.417
The residential permit packet calls for a completed application, a surveyor-prepared site plan, construction plans, engineered truss drawings, access approval, sanitation documentation and proof of ownership.18 Normal processing takes at least 15 business days.18 As of August 1, 2026, the Planning Department must review and approve a proposed site plan before it goes in with a building permit application.19
Fees are based on valuation and square footage and are due when the office accepts the plan submission; amounts come from the county fee schedule.2021
Does Archuleta County have zoning?
Yes. The county Planning Department administers the Archuleta County Land Use Regulations, including zoning, subdivision and floodplain rules, for unincorporated land.3 The Town of Pagosa Springs is outside that jurisdiction and zones its own land under its Land Use and Development Code.417
Standards depend on the parcel's zone district: AF, AR, AE, RR, R, MH, C or I.22 Minimum lot size is 160 acres in AF, 35 acres in AR, 5 acres in AE and 3 acres in RR, falling to 8,000 square feet in R.7 Front setbacks run from 100 feet in AF and 50 feet in AR to 25 feet in AE and 20 feet in RR.23 Maximum building height is 35 feet in AE, RR and R, with accessory buildings capped at 30 feet there.24 We could not confirm lot-coverage limits or an agricultural exemption; ask Planning.
Subdivision platting runs through Planning, and a building application on unplatted property under 35 acres requires chain-of-title research back to 1972 to show the parcel is legal.25
How do septic permits work in Archuleta County?
The Archuleta County Water Quality Department issues septic (onsite wastewater) permits throughout Archuleta County, including inside municipal limits.5 Call 970-264-8342 about applications and design review.26 An approved permit is required before installing, altering, expanding or repairing a system.6 No permit is issued where a municipality or special district provides public sewer service, unless that provider finds service infeasible or authorizes the permit.27 Pagosa Area Water and Sanitation District has its own fees and procedures for new construction.28
A permit expires after 1 year if construction has not started, and installation must finish within 2 years unless Water Quality extends it in writing.5 Water Quality can inspect the tank and soil treatment area before backfill, and septic work must be signed off before final building approval.2930
Soils make this an early question: only about 0.1% of county soils are rated "not limited" for a conventional drain field, a strict rating, so expect a site evaluation and possibly an engineered system.31
Can you live in an RV or tiny home in Archuleta County?
We could not confirm Archuleta County's rules for temporary camping or long-term RV occupancy on private land. Ask the Planning Department how the parcel's zone district applies to the stay, utilities and wastewater before relying on an RV during construction. We also could not confirm the county's manufactured-home or accessory-dwelling rules; Colorado allows a HUD manufactured home anywhere local zoning allows it.32
For a permanent residence, county materials set a minimum floor area of 400 square feet, excluding covered porches, patios and decks.8 A tiny house of 400 square feet or less is regulated under Appendix Q of the residential code, not exempt from permits.9 Colorado also allows state-approved tiny homes for long-term living where local zoning permits the installation.33 The county page we reviewed does not establish a general owner-builder exemption; ask Building before assuming one.
Building a home in Archuleta County: what are the steps?
A practical order for an unincorporated Archuleta County home:
- Ask Planning to confirm the parcel's zone district, legal-lot status, setbacks and floodplain status.22252310
- Confirm access. Ask the Archuleta County Road and Bridge Department whether a county access permit is needed; the county fee schedule lists an Access Permit at $120.34 Direct access to a state highway needs a state access permit, with a $50 fee for single-family residential.35
- Resolve wastewater: public sewer where provided, otherwise a Water Quality septic permit.627
- If using groundwater, get a Colorado Division of Water Resources well permit.11
- Get Planning's site-plan approval, then assemble the surveyor site plan, construction documents, access approval and ownership evidence for Building.1918
- Allow at least 15 business days for normal processing.18
- Schedule the building and septic inspections and obtain the certificate of occupancy before moving in.153016
What should you check before buying land in Archuleta County?
Start with the parcel, not the listing. Confirm the zone district, legal-lot history, minimum lot size, setbacks and height limit with Archuleta County Planning.222572324 Check the floodplain: any development, including homes and agricultural or accessory structures, on a floodplain parcel requires a Floodplain Development Permit.10 Confirm whether wastewater will be public sewer or an onsite system, and budget for a site evaluation.2731
Water and access can control the schedule. A new groundwater well needs a Colorado permit, and the state says an augmentation plan may be needed for wells that are not senior enough.11 Terrain matters too: about 45.3% of county land is at a slope of 15% or less, so verify the actual building envelope.36 The nearest city of 100,000 or more is about 135 miles away.37 For carrying costs, the countywide effective property-tax rate is about 0.3%, with a median annual bill of about $1,541.3839
Watch-outs
- Starting required construction without a permit can add a fine equal to 100% of the permit fee.1
- Since August 1, 2026, the Planning Department must approve a proposed site plan before the building permit application is submitted.19
- Any development on a floodplain parcel, including a home or accessory structure, requires a Floodplain Development Permit.10
- We could not confirm county rules for RV living, temporary camping, accessory dwellings or short-term rentals; ask the Planning Department before buying for those uses.3
Sources
- 2024 Residential Building Packet, quoted and re-checked
- Archuleta County Building Department (archuletacounty.gov)
- Development Services- Planning (4341) – Archuleta County Finance Portal, quoted and re-checked
- Town of Pagosa Springs: Pagosa Springs Land Use Code Art. 3 Zoning Districts (Archuleta County), quoted and re-checked
- Archuleta County On-site Wastewater Treatment System Regulations 2024, quoted and re-checked
- Archuleta County On-site Wastewater Treatment System Regulations 2024, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Development Services- Planning (4341) – Archuleta County Finance Portal, quoted and re-checked
- Colorado Division of Water Resources — Water Administration, quoted and re-checked
- Building Department – Archuleta County (2026 county census)
- Building Department – Archuleta County, quoted and re-checked
- Building Department – Archuleta County, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Development Services- Planning (4341), quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Building Department – Archuleta County, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Archuleta County Resolution 2019-82, Amended Building Codes, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Development Services- Planning (4341), quoted and re-checked
- Archuleta County Water Quality Department (archuletacounty.gov)
- archuletacounty.gov, quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Archuleta County On-site Wastewater Treatment System Regulations 2024, quoted and re-checked
- Development Services- Water Quality (4342) – Archuleta County Finance Portal, 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
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
- 2024 Residential Building Packet, quoted and re-checked
- Access Permits | Frequently Asked Questions (Colorado statewide rule), quoted and re-checked
- Share of land at 15% slope or less: Bolthole Index county data
- Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
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.