Colfax County, NM Building Permits, Zoning & Septic

Unincorporated Colfax County, New Mexico requires state building permits for covered residential construction because the county has no building department¹. County zoning is limited rather than countywide, so confirm the rules for the specific parcel before designing a home². Properties without community sewer need a New Mexico Environment Department Liquid Waste Permit before building³.

At a glance

Building permit: Required for covered work; issued by New Mexico CID because Colfax County has no building department¹
Zoning: Limited; confirm whether county, municipal or extraterritorial rules cover the parcel²
Septic permit: Required from the New Mexico Environment Department for a new or modified onsite system⁴
RV living: Long-term occupancy on private land is unconfirmed; ask the authority governing the parcel²
Tiny home: A permanent-foundation tiny house is allowed statewide when it meets the residential code and Appendix AQ⁵
Owner electrical work: Conditional homeowner permit available after plans, an application and the required CID exam⁶
Water well: A State Engineer permit is required before drilling⁷

Who to call

Building permits

New Mexico Construction Industries Division — Santa Fe Office

State building permits and inspections where no local building department has jurisdiction

(505) 476-4700

2550 Cerrillos Road – 3rd Floor, Santa Fe, New Mexico 87505

Online permits →

Septic permits

New Mexico Environment Department — Raton Field Office

Local NMED field-office contact for liquid-waste and onsite-wastewater questions

575-445-3621

[email protected]

1277A S 2nd Street, Raton, NM 87740

Online permits →

Roads & driveways

Colfax County Road Department

Permission for work within Colfax County-maintained rights-of-way and county driveway, culvert and encroachment forms

(575) 445-8292

207 Copper Ave, Raton, NM 87740

Contact details are copied from each office’s official page and were checked against it on September 28, 2026.

Do you need a building permit in Colfax County, New Mexico?

Yes. Covered residential construction in unincorporated Colfax County requires a permit from the New Mexico Construction Industries Division because Colfax County has no county building department¹. State rules require a permit before covered buildings are erected, enlarged, altered, repaired, moved, improved, removed, converted or demolished⁸. Limited exceptions include a one-story detached tool or storage shed no larger than 120 square feet, a fence no higher than 6 feet, and a detached deck no larger than 200 square feet when it is no more than 30 inches above grade and meets the other stated conditions⁸. Separate plumbing, electrical or mechanical permits may still be required even when the general building work is exempt⁸. Covered homes must comply with the New Mexico Residential Building Code⁹.

Who issues Colfax County building permits, and how do you reach them?

The New Mexico Construction Industries Division, rather than a Colfax County building department, handles residential building permits where the state has jurisdiction¹. The CID Santa Fe office is at 2550 Cerrillos Road – 3rd Floor, Santa Fe, New Mexico 87505, and its phone number is (505) 476-4700¹⁰. CID also provides an online permitting portal¹¹. A homeowner building-permit package requires planning and zoning approval, a completed state building application, complete plan sets and payment of the permit fee before processing¹². CID says fees vary with construction type, square footage, materials and construction cost¹³. Once permitted, residential work receives foundation, slab or under-floor, frame, weather-resistive-barrier and final inspections, with trade finals completed before the final general-construction inspection¹⁴.

Does Colfax County have zoning?

Colfax County has limited zoning rather than a single confirmed countywide zoning system: the Raton–Colfax County extraterritorial zoning ordinance and subdivision regulations apply, while much of the rural county is otherwise described as unzoned². New Mexico law allows a county zoning ordinance to cover county territory outside a municipality's zoning jurisdiction, while municipal extraterritorial authority can apply in specified areas¹⁵. That makes the parcel location decisive: land inside a municipality, an extraterritorial area or another regulated district can face different use, setback and placement rules from other unincorporated acreage¹⁵. Current countywide coverage, zoning districts, setbacks, minimum lot size and minimum dwelling size could not be confirmed; ask Colfax County and the relevant municipality which authority governs the parcel before relying on an “unzoned” listing². New Mexico also requires counties to regulate covered subdivisions, subject to statutory exceptions¹⁶.

How do septic permits work in Colfax County?

Colfax County onsite wastewater systems are permitted by the New Mexico Environment Department, not the county³. A new or modified onsite liquid-waste system requires an NMED permit before construction, and the application includes ownership proof, a site diagram, a floorplan and supporting technical information⁴. The NMED Raton Field Office can be reached at 575-445-3621 or [email protected] and is located at 1277A S 2nd Street, Raton, NM 87740¹⁷. NMED requires inspection notice at least 48 hours, or two business days, ahead, and the system must remain uncovered until inspection¹⁸. Only about 9.8% of county soils rate free of severe limitations for a conventional drain field, so obtain a site evaluation before treating a basic gravity system as a safe budget assumption¹⁹. The published fee for a conventional system with design flow up to 1,000 gallons per day is $225 under the cited schedule²⁰.

Can you live in an RV or tiny home on land in Colfax County?

Long-term RV occupancy on private land in Colfax County could not be confirmed, and the answer can depend on whether county, municipal or extraterritorial zoning applies to the parcel². Ask the land-use authority governing the parcel before moving an RV onto raw land or using one during construction². New Mexico's tiny-house rule provides a clearer route for a permanent dwelling: a tiny house with complete living facilities may be occupied when it sits on a permanent foundation and complies with the New Mexico Residential Code and Appendix AQ⁵. A tiny house on a chassis with its permanent axle still attached is treated as a recreational vehicle and must meet RV codes and licensing requirements⁵. A manufactured home follows a separate path and needs a Manufactured Housing Division installation permit and inspection²¹. These statewide construction approvals do not replace parcel-specific land-use approval⁵.

How do you build a home in Colfax County, step by step?

Identify whether the parcel lies in a municipality, an extraterritorial zoning area or another part of unincorporated Colfax County, then obtain any required planning and zoning approval²¹².

If the site lacks community sewer, apply to NMED for a Liquid Waste Permit before constructing or moving a dwelling onto the lot²².

Obtain a State Engineer permit before drilling a water well, and use a licensed well driller unless the stated exception applies⁷.

Submit the complete residential permit package to CID, including the state application, plans, zoning approval and fee¹².

For work in a county-maintained right-of-way, contact the Colfax County Road Department at (575) 445-8292 and use the applicable driveway, culvert or encroachment form²³. A connection to a state highway instead requires a New Mexico Department of Transportation access permit²⁴.

Keep the permit posted and schedule each required CID inspection as construction progresses¹⁴.

What should you check before buying land in Colfax County?

Start with water and septic feasibility: Colfax County averages about 17.1 inches of precipitation annually and has experienced severe drought in about 48.6% of years²⁵²⁶. A well requires a State Engineer permit before drilling, while only about 9.8% of county soils rate free of severe limitations for a conventional septic drain field⁷¹⁹. Terrain varies, although about 64.2% of the county is at a slope of 15% or less and about 38.7% is wooded²⁷²⁸. Confirm legal and physical access as well: county right-of-way work goes through the Road Department, while direct access to a state highway needs a state permit²³²⁴. Finally, verify zoning jurisdiction and floodplain status before closing because the county's zoning coverage is limited, and development in a mapped special flood-hazard area needs approval from the applicable local floodplain administrator²²⁹. The effective property-tax rate is about 0.6%, with a median annual property-tax bill of about $927³⁰³¹.

Watch-outs

Do not treat an 'unzoned' listing as proof that an RV, tiny home, setback or minimum lot rule is absent; confirm which land-use authority covers the parcel².
Only about 9.8% of Colfax County soils rate free of severe limits for a conventional septic drain field, so settle septic feasibility before fixing the house site or budget¹⁹.
The confirmed homeowner route applies to electrical work and requires an application, plans, a CID exam score of at least 75%, and personal performance of the work; ask CID about every other trade⁶.

Sources

Written September 28, 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.

How Colfax County scores

Seclusion93100% ev.

Self-Sufficiency31100% ev.

Admin Boringness4390% ev.

Durability35100% ev.

Property Autonomy38100% ev.

Carry Cost84100% ev.

Evidence strength: 98%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$253kTypical home

0.6%Property tax

$977Land / acre

17.1"Annual rain

48.6% of yrsSevere drought

1 / yr (+1)Mid-century 100°F days

25.4 daysMid-century dry spell

1.02" (+2.7%)Mid-century 1-day rain

1.33×Wildfire change factor

100%Forward climate coverage

$1,806Home insurance / yr

-0.5% / yrInsurance growth

1%Nonrenewal rate

county median (2+ published ZIPs)Insurance basis

1,129People within 30 min

59,665People within 2 hr

1,229Radius comparison (15 mi)

3.3People / sq mi

3.6%Federal land

64.2%Land at 15% slope or less

9.8%Septic soil without severe limits

224,700 acWorkable land screen

38.7%Wooded land

20.5 tonsBiomass / forest ac

47.9°FAvg temp

Answers from the rulebook for Colfax County

What the ordinances and state agencies actually say — one answer per question, each quoted from the official source and independently re-checked.

Colfax County rules

County-wide zoningPresent
County zoning is limited: the Raton-Colfax County Extraterritorial Zoning Ordinance (1981, as amended) plus subdivision regulations apply; much of the rural county is otherwise unzoned.
Colfax County Ordinances ↗Scouted from the county site, not yet independently re-checked

New Mexico rules that apply here

Building permitRequired
Buildings and structures regulated by the New Mexico Residential Code, including residential construction, alterations, repairs, additions, moves, improvements, removals, conversions, and demolitions, and state-administered commercial construction.
- A permit must be obtained before covered work begins.
- Residential exceptions include one-story detached accessory buildings used as tool or storage sheds, playhouses, and similar uses not exceeding 120 square feet; fences not over 6 feet high; specified retaining walls; certain water tanks, sidewalks, driveways, finish work, shallow prefabricated pools, playground equipment, window awnings, and detached decks.
- Unless otherwise exempted, separate plumbing, electrical, and mechanical permits may still be required for otherwise exempted residential work.
- Commercial applicants must be validly licensed with the appropriate license classification, submit the state building permit application, obtain any required city or county zoning approval, and pay the valuation-based fee before permit issuance.
residential accessory-building exemption floor area: <= 120 square feet (One-story detached accessory buildings used as tool and storage sheds, playhouses, and similar uses.) · fence exemption height: <= 6 feet · water-tank exemption capacity: <= 5000 gallons (Height-to-diameter or width ratio must not exceed 2:1.) · detached-deck exemption area: <= 200 square feet (Deck must not be more than 30 inches above grade, must not be attached to a dwelling, and must not serve the required exit door.)
“Except as specified in Section 105.2 IRC, no building or structure regulated by this code shall be erected, constructed, enlarged, altered, repaired, moved, improved, removed, converted, or demolished unless a permit has first been obtained from the building official.”
Building Permit Guide for Residential Construction ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- Required — Residential building-permit applications handled by the New Mexico Construction Industries Division, including projects in Colfax County where CID is the permitting authority.
  “The submittal requirements for a homeowner’s building permit are as follows:”
  Construction Industry Frequently Asked Questions ↗Re-checked Sep 26, 2026
Owner-builder exemptionConditional
A homeowner seeking to obtain a homeowner electrical permit for work on the homeowner's house.
- The homeowner must submit an electrical homeowner application.
- Plans or drawings showing electrical equipment on the floor plan and panel schedule are required.
- The homeowner must pass the CID electrical homeowner examination with a minimum score of 75%.
- Electrical work under the homeowner permit may only be performed by the permittee.
minimum passing score: >= 75 percent
“Once the plans are approved, the permit may be issued to the homeowner only if the homeowner passes the electrical exam for homeowners administered by CID, with a minimum passing score of 75%.”
Construction Industry Frequently Asked Questions ↗Re-checked Sep 26, 2026
Building code adoptedAdopted (with conditions)
Commercial construction, alteration, relocation, enlargement, replacement, repair, equipment, use and occupancy, location, removal, and demolition of buildings or structures in New Mexico subject to the jurisdiction of the Construction Industries Division.
- The 2021 New Mexico Commercial Building Code applies on or after July 14, 2023.
- The rule does not apply when performed pursuant to a permit for which an application was received by CID before July 14, 2023.
- Detached one- and two-family dwellings and multiple single-family dwellings (townhouses) not more than three stories high with separate means of egress, and their accessory structures, must comply with the 2021 New Mexico Residential Building Code instead.
- Existing buildings not subject to the residential code undergoing a change of occupancy, repair, alteration, or addition must comply with either the commercial building code or the existing building code, as applicable.
- The rule adopts the 2021 International Building Code by reference, as amended by the rule.
effective date: 2023-07-14 (unless a later date is cited at the end of a section) · adopted reference code: 2021 International Building Code (as amended by 14.7.2 NMAC)
“14.7.2.5 EFFECTIVE DATE: July, 14, 2023, unless a later date is cited at the end of a section. [...] 14.7.2.8 ADOPTION OF THE 2021 INTERNATIONAL BUILDING CODE: A. This rule adopts by reference the 2021 International Building Code, as amended by this rule.”
Rules, Laws, and Building Codes ↗Re-checked Sep 11, 2026
2 more reviewed findings on this topic
- Adopted (with conditions) — Construction in Colfax County subject to New Mexico state building-code jurisdiction.
  “2021 New Mexico Commercial Building Code NMAC 14.7.2 2021 New Mexico Residential Building Code NMAC 14.7.3”
  Rules, Laws, and Building Codes ↗Re-checked Sep 26, 2026
- Adopted (with conditions) — Detached one- and two-family dwellings, multiple single-family dwellings (townhouses) not more than three stories high with separate means of egress, and their accessory structures in New Mexico subject to the jurisdiction of the Construction Industries Division.
  “14.7.3.5 EFFECTIVE DATE: July 14, 2023, unless a later date is cited at the end of a section. From the date of publication of this rule in the New Mexico register, until December 14, 2023, permits may be issued under either the previously adopted rule, or this rule. After December 14, 2023, permits may be issued only under this rule. [...] A. This rule adopts by reference the 2021 International Residential Code, as amended by this rule.”
  Rules, Laws, and Building Codes ↗Re-checked Sep 11, 2026
InspectionsRequired
State-administered residential and commercial construction requiring building permits.
- Residential inspections include foundation, concrete slab or under-floor, frame, weather-resistive barrier, and final inspection.
- Final electrical, plumbing, and mechanical inspections must occur before the final general construction inspection.
- The building official or Construction Inspector may require additional inspections to establish compliance with the New Mexico Building Code and other enforced laws.
- Inspection requests require the permit number, inspection type, requestor contact information, and confirmation that work is complete and the permit is affixed near the front exterior door.
“REQUIRED INSPECTIONS To request an inspection e-mail us at [email protected] or call 505-222-9813 or 877-243-0979”
Building Permit Guide for Residential Construction ↗Re-checked Sep 12, 2026
Tiny homesAllowed (with conditions)
Tiny houses used as single dwelling units with complete independent living facilities and placed on a permanent foundation statewide in New Mexico.
- The unit must provide permanent provisions for living, sleeping, eating, cooking, and sanitation.
- The tiny house must comply with the New Mexico Residential Code and Appendix AQ.
- Tiny houses constructed in New Mexico or transported into New Mexico must be inspected for compliance with New Mexico Residential Code requirements.
- A tiny house on a chassis with a permanent axle is treated as a recreational vehicle and must meet recreational-vehicle codes and licensing requirements while the axle remains in place.
- If axles are removed and the unit is placed on supports or a foundation, it must comply with the code requirements for tiny houses on a permanent foundation.
- The rule applies to construction, use, and occupancy subject to the jurisdiction of the Construction Industries Division; construction not addressed in the residential code must comply with the New Mexico Commercial Building Code.
maximum floor area excluding lofts: <= 400 square feet (The definition excludes loft area and excludes recreational vehicles.) · minimum habitable-space and hallway ceiling height: >= 6 feet 8 inches (Loft ceiling heights may be lower.) · minimum bathroom, toilet-room, and kitchen ceiling height: >= 6 feet 4 inches (None stated in the cited passage.)
“This appendix shall be applicable to tiny houses used as single dwelling units providing complete independent living facilities for one or more persons”
14.7.3 NMAC — 2021 New Mexico Residential Building Code ↗Re-checked Sep 12, 2026
Manufactured homesAllowed (with conditions)
Installation and resulting residential use and occupancy of new or pre-owned manufactured homes statewide in New Mexico, subject to the Manufactured Housing Division's permitting and inspection rules.
- An installation permit or combined installation and permanent-foundation inspection permit must be obtained before installation.
- The permit must identify the licensees performing installation work and the consumer's name and address; a map is required when the address is a post-office box or rural route.
- An unlicensed homeowner working on the homeowner's own principal residential property must perform the work personally or use division-approved licensees, execute the required acknowledgment, and assume responsibility for applicable federal, state, local, code, and inspection requirements.
- Final inspection must certify that the manufactured home meets the minimum standards for use and occupancy under the act and regulations.
- Permits are valid for 180 days, subject to possible time extension for weather or re-manufacturing or permanent-foundation inspections.
- Each new or pre-owned manufactured home installed in New Mexico requires an installation permit.
- Failure to obtain a permit subjects the homeowner, dealer, or installer to a fine of double the permit fee.
- Local requirements, codes, and inspections still apply; the cited state rule does not establish local land-use placement or zoning permission.
installation permit validity: 180 days (A time extension may be granted for weather-related delay or inspections involving a home being re-manufactured or installed on a permanent foundation.) · permit for certain alteration, modification, or repair: 15 USD (Available upon written request and excludes warranty work performed under a previous permit and installation.) · fine for installation without permit: double the permit fee (Applies to the homeowner, dealer, or installer.)
“inspectors shall certify on the permit, or upon any inspection report, that the manufactured home meets the minimum standards for use and occupancy”
14.12.9 NMAC — Inspections ↗Re-checked Sep 12, 2026
Who permits septicState
On-site liquid waste systems and effluent receiving 5,000 gallons or less per day and not requiring a discharge plan or NPDES permit.
- 20.7.3 NMAC identifies the New Mexico Environmental Improvement Board as the issuing agency and defines the department as the New Mexico Environment Department.
- More stringent city or county requirements may also apply.
maximum regulated flow: <= 5000 gallons per day (Systems requiring a discharge plan under 20.6.2 NMAC or an NPDES permit are outside this part.)
“20.7.3.1 ISSUING AGENCY: New Mexico Environmental Improvement Board.”
20.7.3 NMAC — Liquid Waste Disposal and Treatment ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- State (with conditions) — Onsite wastewater and septic systems in Colfax County.
  “The Onsite Wastewater Bureau ensures septic systems are adequately installed and maintained in a manner that is protective of public health and the environment.”
  Onsite Wastewater Program ↗Re-checked Sep 26, 2026
Septic permitRequired
Installation or modification of a new or existing on-site liquid waste system, including residential or commercial units on lots for which such a system is required.
- A permit issued by the New Mexico Environment Department, including payment of the permit fee, is required before construction or modification.
- A permit is not required for graywater discharges or systems meeting 20.7.3.810 NMAC.
- A dwelling may not be constructed, modified, or transported onto a lot requiring an on-site liquid waste system unless the department has issued the permit beforehand.
- Other state, city, county, or federal approvals may also be required.
- The department generally acts within 10 working days after a completed conventional-system application, subject to the rule's extension for potentially more stringent requirements.
maximum regulated flow: <= 5000 gallons per day (20.7.3.2 NMAC scope limitation) · permit application completeness determination: 5 working days (Conventional systems) · conventional permit decision: 10 working days (After receipt of a completed application; review may extend to 20 working days when more stringent requirements may be necessary)
“No person shall install or have installed a new on-site liquid waste system or modify or have modified an existing on-site liquid waste system, unless that person obtains a permit issued by the department, including payment of the permit fee, prior to construction of such installation or modification.”
20.7.3.401 NMAC — Permitting; General Requirements ↗Re-checked Sep 12, 2026
One more reviewed finding on this topic
- Required — New or modified onsite wastewater systems in Colfax County.
  “Application – Print and fill out an Application for Liquid Waste Permit, Section 20.7.3.401 NMAC”
  Apply for a Permit ↗Re-checked Sep 26, 2026
Septic inspectionRequired
Permitted onsite wastewater systems in Colfax County before the system is covered and placed into operation.
- Inspection must be requested from NMED at least 48 hours or two business days in advance.
- The system must not be covered before inspection.
- After an approved inspection, NMED issues a Permit to Operate.
- NMED may conduct a pre-inspection by request or if required.
inspection notice: >= 48 hours (two business days)
“Request Inspection by NMED 48 hours (2 business days) in advance (DO NOT COVER BEFORE INSPECTION)”
Apply for a Permit ↗Re-checked Sep 26, 2026
Off-grid sanitationLimited
Privies, permitted on-site liquid waste systems, and qualifying private residential graywater discharges statewide.
- A privy may dispose of human excreta and toilet paper but not other liquid wastes.
- Untreated liquid waste must go to a permitted and approved enclosed system, permitted and approved treatment unit, or public sewer, except qualifying graywater.
- Graywater under 250 gallons per day may be used for household gardening, composting, or landscaping irrigation only if all listed conditions are met, including no runoff, no spraying, no watercourse discharge, floodway exclusion, five-foot groundwater separation, local ordinance compliance, 24-hour storage limit, and specified well setbacks.
- Graywater use for purposes other than irrigation or composting requires a department permit.
private residential graywater discharge: < 250 gallons per day (Qualifying graywater discharge under 20.7.3.810 NMAC) · graywater setback from private domestic well: >= 100 feet · graywater setback from public water supply well: >= 200 feet · graywater storage before discharge: <= 24 hours
“A privy may be used for the disposal of human excreta and toilet paper, but not for the disposal of other liquid wastes.”
20.7.3 NMAC — Liquid Waste Disposal and Treatment ↗Re-checked Sep 12, 2026
Well permitRequired
Water wells drilled in Colfax County.
- A permit to drill must be obtained from the Office of the State Engineer before drilling.
- Domestic wells are allowed by state law unless prohibited by a local ordinance.
- A permit generally expires unless the well is completed within one year of issuance; an expired permit requires a new application and additional filing fee.
- Wells must be drilled by a licensed well driller, subject to the stated driven-well exception.
permit completion period: 1 year (unless the permit is otherwise extended under applicable rules)
“A 72-12-1.1 domestic well permit shall automatically expire unless the well is completed and the well record is filed with the state engineer within one year of the date of issuance of the permit.”
Drilling Your Water Well ↗Re-checked Sep 26, 2026
Mandatory utility hookupConditional
Residential and commercial units using an on-site liquid waste system when a public sewer is available and connection is required by the local authority with jurisdiction.
- A public sewer is deemed available when it has capacity and is located in a thoroughfare, right-of-way, or easement abutting the lot.
- The on-site system must be properly abandoned within 30 days after connection.
- The state rule does not itself identify which local authority will require connection.
abandonment deadline after sewer connection: 30 days
“All residential and commercial units utilizing an on-site liquid waste system shall connect to a public sewer upon availability and if required in accordance with the local authority that has jurisdiction.”
20.7.3 NMAC — Liquid Waste Disposal and Treatment ↗Re-checked Sep 12, 2026
Agricultural exemptionConditional
Statewide agricultural exemption from the New Mexico Subdivision Act for the sale, lease, or other conveyance of a parcel of at least 35 acres.
- The parcel must be thirty-five acres or larger.
- The conveyance must occur within a twelve-month period covered by the statutory exception.
- The land must have been used primarily and continuously for agricultural purposes, in accordance with Section 7-36-20 NMSA 1978, for the preceding three years.
minimum parcel size: >= 35 acres · agricultural use duration: >= 3 years (land must have been used primarily and continuously for agricultural purposes in accordance with Section 7-36-20 NMSA 1978) · conveyance period: 12 months (within any twelve-month period)
“the sale, lease or other conveyance of any parcel that is thirty-five acres or larger in size within any twelve-month period; provided that the land has been used primarily and continuously for agricultural purposes, in accordance with Section 7-36-20 NMSA 1978, for the preceding three years;”
Senate Bill 176 — New Mexico Subdivision Act ↗Re-checked Sep 12, 2026
Subdividing landRegulated (with conditions)
Division of land statewide in New Mexico into two or more parcels for sale, lease, other conveyance, or building development, subject to the New Mexico Subdivision Act and its statutory exceptions.
- The source defines subdivision as division of a surface area of land, including land within a previously approved subdivision, into two or more parcels for sale, lease or other conveyance or for building development, whether immediate or future.
- The Act contains exceptions, including certain agricultural conveyances, grazing or farming divisions, municipal-boundary divisions, family transfers, divisions creating no parcel smaller than 140 acres, and other listed exceptions.
“The board of county commissioners of each county shall regulate subdivisions within the county's boundaries.”
Senate Bill 176 — New Mexico Subdivision Act ↗Re-checked Sep 12, 2026
Driveway accessRequired
Permanent or temporary direct vehicular access from property in close proximity to or adjoining a New Mexico state highway.
- An access permit must be issued by the New Mexico Department of Transportation before constructing or modifying covered access.
- Access permits are issued only when the application complies with 18.31.6 NMAC.
- The department or an approved issuing authority may impose terms and conditions.
- The rule concerns state highways under the jurisdiction of the state transportation commission; it does not establish a universal permit requirement for every non-state roadway.
- For additional traffic from expansion or redevelopment, the property owner must contact the department to determine whether a new application or access modification is required; no new application is required if the department determines modifications are unnecessary.
“no person shall construct or modify any permanent or temporary access [...] without an access permit issued by the New Mexico department of transportation.”
18.31.6 NMAC ↗Re-checked Sep 12, 2026
Building in a floodplainRequired
Construction or development within a FEMA Special Flood Hazard Area in a New Mexico community, and proposed construction or other development in communities where FEMA has not defined a Special Flood Hazard Area.
- Approval by the local community Floodplain Administrator is required before construction or development within any Special Flood Hazard Area.
- Where FEMA has not defined the Special Flood Hazard Area, the community must require permits for all proposed construction or other development, including manufactured homes, to determine whether the activity is in a flood-prone area.
- Approval is intended to ensure compliance with the National Flood Insurance Program and the community’s floodplain management ordinance.
- The source identifies 104 New Mexico communities participating in the National Flood Insurance Program; the administering official is the applicable local community Floodplain Administrator, not the state agency.
“Approval by the local community Floodplain Administrator is required before construction or development begins within any Special Flood Hazard Area.”
Flooding ↗Re-checked Sep 12, 2026
Permit feesPublished (with conditions)
New Mexico liquid-waste permits applicable to Colfax County.
- The NMED page labels the schedule as effective 7/1/20.
- Fees vary by system type and design flow.
- The page also lists re-inspection and unpermitted-system inspection fees.
conventional system design flow up to 1,000 gpd: 225 USD (fee schedule effective 7/1/20) · re-inspection fee: 125 USD (fee schedule effective 7/1/20) · unpermitted system inspection fee: 250 USD (fee schedule effective 7/1/20)
“Conventional system, register, construct, or modify design flow up to 1,000 gpd | 7/1/20 | $225.00”
Apply for a Permit ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Variable (with conditions) — New Mexico Construction Industries Division permitting fees for covered construction work statewide.
  “Permitting Fees are based upon type of construction, square footage, type of materials and construction costs.”
  Construction Industries Forms and Applications Fees ↗Re-checked Sep 12, 2026
Permit processPublished (with conditions)
NMED liquid-waste permitting process applicable to Colfax County.
- Applicants submit to the local NMED field office.
- Conventional systems may take up to five business days for completeness review and ten business days for a decision.
- Advanced Treatment Systems may take up to ten business days for completeness review and twenty business days for a decision.
- A variance process may take at least twenty days.
- Appeals must be filed with the NMED Secretary within 15 working days after notice of NMED action.
appeal deadline: 15 working days (after notice of NMED action)
“Conventional Systems may take up to five (5) business days for completeness check and ten business (10) days to return a decision.”
Apply for a Permit ↗Re-checked Sep 26, 2026
One more reviewed finding on this topic
- Published (with conditions) — Construction Industries Division permit applications in New Mexico.
  “Permits can also be completed using our online permitting portal.”
  Forms and Applications ↗Re-checked Sep 12, 2026
county zoning authorityGeneral
New Mexico counties may adopt zoning ordinances for all or any portion of county territory that is not within a municipality's zoning jurisdiction.
- The county zoning authority's ordinance applies only to territory not within the zoning jurisdiction of a municipality.
- Municipalities may have concurrent extraterritorial zoning authority in specified circumstances, including population-based distances, overlapping extraterritorial jurisdictions, and additional territory placed under municipal jurisdiction by county-municipal agreement.
- Concurrent municipal authority is exercised pursuant to an extraterritorial zoning authority or joint powers agreement and may be exercised whether or not the county has enacted a comprehensive zoning ordinance.
- In the absence of a county zoning ordinance, a qualified-elector petition signed by at least twenty-five percent of votes cast for governor at the preceding general election may require the board of county commissioners to adopt a county zoning ordinance within one year.
“A. a county zoning authority may adopt a zoning ordinance applicable to all or any portion of the territory within the county that is not within the zoning jurisdiction of a municipality;”
Senate Bill 241, Final Version ↗Re-checked Sep 21, 2026
county building authorityLimited
New Mexico counties that qualify as an authority having jurisdiction may administer permitting, inspection, and enforcement for residential construction in unincorporated areas and enforce applicable New Mexico construction codes.
- A county must have a full-service building department employing a full-time certified building official and have permitting, inspection, and enforcement authority over general construction, electrical, and mechanical-plumbing trades.
- A county established as an authority having jurisdiction before July 1, 2009 may continue with authority over specified trades without a full-service building department until it relinquishes that authority.
- Construction work subject to the Construction Industries Licensing Act and applicable rules requires the applicable permit before construction or specified installation, alteration, repair, maintenance, or demolition work begins, unless an applicable statute or rule provides otherwise.
- The statewide rule is effective March 10, 2022, unless a later date is cited at the end of a section.
- A permit may be issued to a homeowner only subject to the limitations of 14.5.2.18 NMAC and an annual permit under 14.5.2.19 NMAC.
““Authority having jurisdiction” “AHJ” means the state or a municipality, county or other political subdivision that has a full-service building department employing a full-time certified building official and has permitting, inspection and enforcement authority over the general construction, electrical and mechanical-plumbing trades within its jurisdiction.”
14.5.1 NMAC, Construction Industries General Provisions ↗Re-checked Sep 21, 2026

Still unanswered

We looked and could not find an official answer yet. Silence is not permission — ask the county directly.

Certificate of occupancy — Certificate-of-occupancy requirements for construction in Colfax County.
Local zoning — Aggregate local zoning across Colfax County municipalities, extraterritorial areas, and unincorporated areas.
Zoning districts — Published zoning districts applicable in Colfax County.
Minimum dwelling size — Minimum dwelling size in Colfax County.
Minimum lot size — Minimum lot size in Colfax County.

7 more unanswered

Setbacks
Lot coverage
Building height
Living in an RV
Camping on your land
Accessory dwellings
Short-term rentals

Each answer was extracted from an official source and independently re-checked against that source by a second reviewer. That is an evidence check, not legal advice. Rules change; confirm with the authority before you buy or build.

Water rights & wells in Colfax County

Whether a new home can legally get its own water here — the sub-state groundwater regime, from New Mexico’s water agency.

Actively managed

This basin is under active state management — new water use is scrutinized, though a domestic well is usually still allowed.

Household wellPermit required (issued by right)

Nearly all developed New Mexico lies inside an OSE 'declared' underground water basin, but a household 72-12-1.1 domestic well is a by-right permit the State Engineer issues even in closed/over-appropriated basins (metering can be required). The by-right amount is cut to 0.25 acre-ft/yr in a declared Domestic Well Management Area, and a few basin-specific orders cap it further (Gallup Order 197, Zuni Order 199) or stop issuing new domestic permits entirely (Hot Springs Order 198).

Limit: 1 acre-ft/yr by right (NMSA 72-12-1.1); 0.25 acre-ft/yr in a declared Domestic Well Management Area

NM OSE domestic well rules, 19.27.5 NMAC ↗

Tucumcari Underground Water Basinpartial of county
OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. OSE-declared basin centered on Quay County (Order 155, 1998).
NM OSE Article 7 (Declared Underground Water Basins) ↗
Canadian River Underground Water Basinpartial of county
OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. Canadian River drainage in NE NM (Order 161, 2005), administered under the Canadian River Compact.
NM OSE Article 7 (Declared Underground Water Basins) ↗
Clayton Underground Water Basin (Eastern portion)partial of county
OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. OSE 2019 guidelines apply block administration to the thin (<50 ft) Ogallala/High Plains aquifer; guidelines expressly exempt 72-12-1.1 domestic wells.
NM OSE Eastern Clayton Basin Guidelines (2019) ↗

Prior-appropriation state (first in time, first in right). Groundwater rules change and basin boundaries follow the aquifer, not the county line — confirm current well and appropriation rules with the New Mexico state water agency before you buy or drill.Groundwater governance as of Jul 2026, cited to each administering agency.

Living off-grid in Colfax County, New Mexico

Is Colfax County a good place to live off-grid or homestead?

Colfax County scores 50/100 on the Bolthole Index, a solid county profile. Its strengths: deep seclusion — about 1,129 people within a 30-minute drive and manageable long-term carry cost. Watch-outs: thin water margin (17.1″/yr rainfall) and elevated current hazard exposure.

Do you need a building permit in Colfax County, New Mexico?

Colfax County generally requires a residential building permit, and it enforces county zoning. Onsite septic is permitted by New Mexico Environment Department, Onsite Wastewater (Liquid Waste) Program. Owner-builders may act as their own contractor to build their home. These answers are quoted from official sources and independently re-checked. Rules change and cities within the county differ — always confirm with the county before you buy or build.

How much does land cost in Colfax County, New Mexico?

Land in Colfax County runs about $977 per acre, based on the latest county data.

What is the water situation in Colfax County?

Colfax County gets about 17.1" of rain a year, with severe drought in roughly 48.6% of years. On water rights, Colfax County lies in the Tucumcari Underground Water Basin — OSE-declared Article-7 groundwater basin; new non-domestic (72-12-3) appropriations require an OSE permit showing unappropriated water. The 72-12-1.1 household domestic well remains by-right — no Domestic Well Management Area is declared in New Mexico. OSE-declared basin centered on Quay County (Order 155, 1998)..

How remote is Colfax County?

A representative private-land location has about 1,129 people within a 30-minute drive and 59,665 within two hours. The road-network catchments count population across county lines and clusters of smaller cities; straight-line radius values remain available as a comparison.

Building permits, zoning and land rules in Colfax County, New Mexico

At a glance

Who to call

Do you need a building permit in Colfax County, New Mexico?

Who issues Colfax County building permits, and how do you reach them?

Does Colfax County have zoning?

How do septic permits work in Colfax County?

Can you live in an RV or tiny home on land in Colfax County?

How do you build a home in Colfax County, step by step?

What should you check before buying land in Colfax County?

Watch-outs

Sources

Colfax County in New Mexico

How Colfax County scores

Find land. Bring the promising ones back.

Parcel due diligence

Answers from the rulebook for Colfax County

Colfax County rules

New Mexico rules that apply here

Still unanswered

Water rights & wells in Colfax County

Living off-grid in Colfax County, New Mexico

Is Colfax County a good place to live off-grid or homestead?

Do you need a building permit in Colfax County, New Mexico?

How much does land cost in Colfax County, New Mexico?

What is the water situation in Colfax County?

How remote is Colfax County?

How Colfax compares in New Mexico