Bolthole Index

Grant County, New Mexico

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

44Index Score / 100
#12 of 33 in New Mexico

Construction in Grant County, New Mexico generally requires a building permit from the state Construction Industries Division, not Grant County.1 Grant County requires its floodplain-development process to be completed before CID will issue the building permit.2 Septic permits come from the New Mexico Environment Department.3

At a glance

Building permit
Required for covered work; issued by New Mexico CID1
Floodplain review
Complete the county process before CID issues a building permit2
Zoning
Countywide rules could not be confirmed; ask County Planning4
Septic
State permit required before installation or modification5
Tiny home
Permanent-foundation homes are allowed under state code; local placement remains unconfirmed6
Owner-builder
Available with a signed application and notarized responsibility form7
RV living
Long-term private-land occupancy could not be confirmed; ask County Planning4

Who to call

Building permits

New Mexico Construction Industries Division, Las Cruces

Building permits and inspections, including plumbing, mechanical and electrical trades, for Grant County

575-524-6320

Floodplain permits

Grant County Planning and Mapping Department

Floodplain development permits and county land-development questions

(575) 574-0007

1400 highway 180 East/PO Box 898 Silver City NM 88062

Septic permits

New Mexico Environment Department Silver City Field Office

Liquid-waste permit applications and permit searches for the Silver City area

575-388-1934

[email protected]

3082 32nd Street Bypass, Suite D Silver City, NM 88061

Contact details are copied from each office’s official page and were checked against it on September 27, 2026.

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

Yes. Buildings and structures covered by the New Mexico Residential Code generally need a permit before construction, alteration, repair, moving, improvement, removal, conversion or demolition begins.8 Grant County does not issue that building permit; the New Mexico Construction Industries Division office in Las Cruces manages the applications and inspections, including the plumbing, mechanical and electrical trades.9

Grant County adds an important first step: CID will not issue the building permit until the applicable floodplain-development process is complete.2 State-enforced codes include the New Mexico building, existing-building, energy, mechanical and plumbing codes listed in the county's permit guide.10 Some small accessory structures and other limited projects are exempt from the building permit, but separate trade permits may still apply.8

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

The New Mexico Construction Industries Division in Las Cruces is the building-permit office for work in Grant County; call 575-524-6320 about building, plumbing, mechanical and electrical permits or inspections.9 Grant County Planning and Mapping handles the county floodplain-development step; call (575) 574-0007 before filing with CID.11

CID permitting fees vary with the construction type, square footage, materials and construction cost.12 State permits can also be completed through CID's online permitting portal.13 After issuance, residential work proceeds through required inspections such as foundation, slab or under-floor, framing, weather-resistive barrier and final inspection, with final trade inspections preceding the final general inspection.14 Keep the permit information available when requesting inspections.14

Does Grant County, New Mexico have zoning?

We could not confirm a comprehensive zoning ordinance for all unincorporated Grant County, so do not treat a rural parcel as unrestricted.4 New Mexico law allows a county to zone territory outside a municipality's zoning jurisdiction, while municipal or extraterritorial rules can govern other locations.15 Grant County also administers land use, subdivision, floodplain, mapping, addressing and code-enforcement work through its planning function.11

Before relying on a listing's claim about permitted uses, ask Grant County Planning and Mapping to identify the controlling jurisdiction and any parcel-specific limits.11 We could not confirm countywide answers for minimum lot size, minimum dwelling size, setbacks, lot coverage or building height.4 Land division is regulated statewide through the county commissioners, subject to statutory exceptions.16

How do septic permits work in Grant County?

The New Mexico Environment Department permits on-site liquid-waste systems in Grant County, and the local contact is NMED's Silver City field office at 575-388-1934.317 A permit and fee are required before installing or modifying a covered septic system, and the application goes to the local NMED field office for review.518

NMED requires ownership documentation, a site diagram, a floorplan and supporting material with the application.19 Request the NMED inspection 48 hours, or 2 business days, ahead and do not cover the system before inspection; approval leads to a permit to operate.20 Only 2.3% of mapped county soils avoid a “very limited” rating for conventional drain fields, so make the site evaluation an early feasibility item rather than assuming a standard system will work.21

Can you live in an RV or tiny home in Grant County?

We could not confirm a Grant County rule allowing long-term RV residence or temporary camping on private land, so ask County Planning and Mapping about the specific parcel before moving an RV onto it.4 A tiny house used as a dwelling is allowed under the state residential code when it provides complete independent living facilities, complies with the New Mexico Residential Code and Appendix AQ, and sits on a permanent foundation.6

A tiny house with its permanent axle still attached is treated as a recreational vehicle under state rules; removing the axles and placing the unit on supports or a foundation brings the state tiny-house code into play.6 The state construction rule does not settle local placement or land-use approval, and we could not confirm Grant County's parcel-level occupancy rules.64 Septic approval still comes from NMED when the dwelling needs an on-site liquid-waste system.5

Building a home in Grant County: what are the steps?

  1. Ask Grant County Planning and Mapping which jurisdiction controls the parcel and complete the applicable floodplain-development process before seeking the building permit.211
  2. Confirm water and wastewater feasibility; obtain the NMED septic permit before constructing a dwelling that requires an on-site system.5
  3. Submit the state building-permit application and required project information to CID, then pay the valuation-based fee before issuance.22
  4. If acting as owner-builder, sign the permit application and notarize the Homeowner's Responsibilities Form; licensed subcontractors must separately permit their work.7
  5. Schedule the required foundation, under-floor or slab, framing, weather-barrier, trade and final inspections in the required sequence.14
  6. If the driveway connects directly to a state highway, obtain the New Mexico Department of Transportation access permit before constructing or modifying that access.23

What should you check before buying land in Grant County?

Start with legal access, the controlling land-use jurisdiction, floodplain status, water availability and septic feasibility.425 A driveway connecting directly to a state highway requires a state access permit, while we could not confirm a countywide rule for driveways on other roads.23

Grant County receives about 15.1 inches of precipitation annually, and severe drought occurred in 40.9% of measured years, making a reliable water plan central to rural-land due diligence.2425 We could not confirm the private-well permitting requirement, so ask the New Mexico Office of the State Engineer before treating a proposed well as assured.4 Conventional septic suitability is also tight: only 2.3% of mapped soils avoid a severe limitation rating.21 The effective property-tax rate is about 0.5%, with a median annual bill of $756.2627

Watch-outs

  • CID will not issue a Grant County building permit until the floodplain-development process is complete.2
  • Only 2.3% of mapped Grant County soils avoid a very-limited rating for conventional septic drain fields.21
  • Long-term RV residence, minimum dwelling size and parcel setbacks remain unconfirmed; ask Grant County Planning and Mapping before purchase.411

Sources

  1. Grant County Building Permits (2026 county census)
  2. Building Permits | Grant County, NM, quoted and re-checked
  3. NMED Liquid Waste (Septic) Permitting (2026 county census)
  4. (2026 county census)
  5. 20.7.3.401 NMAC — Permitting; General Requirements (New Mexico statewide rule), quoted and re-checked
  6. 14.7.3 NMAC — 2021 New Mexico Residential Building Code (New Mexico statewide rule), quoted and re-checked
  7. Building Permit Guide for Residential Construction, quoted and re-checked
  8. Building Permit Guide for Residential Construction, quoted and re-checked
  9. New Mexico Construction Industries Division, Las Cruces (grantcountynm.gov)
  10. Building Permit Guide for Commercial Construction, quoted and re-checked
  11. Grant County Planning and Mapping Department (grantcountynm.gov)
  12. Construction Industries Forms and Applications Fees (New Mexico statewide rule), quoted and re-checked
  13. Forms and Applications (New Mexico statewide rule), quoted and re-checked
  14. Building Permit Guide for Residential Construction (New Mexico statewide rule), quoted and re-checked
  15. Senate Bill 241, Final Version (New Mexico statewide rule), quoted and re-checked
  16. Senate Bill 176 — New Mexico Subdivision Act (New Mexico statewide rule), quoted and re-checked
  17. New Mexico Environment Department Silver City Field Office (env.nm.gov)
  18. Apply for a Permit, quoted and re-checked
  19. Apply for a Permit, quoted and re-checked
  20. Apply for a Permit, quoted and re-checked
  21. Share of soils without severe limits for a conventional septic drain field (USDA SSURGO): Bolthole Index county data
  22. Building Permit Guide for Commercial Construction, quoted and re-checked
  23. 18.31.6 NMAC (New Mexico statewide rule), quoted and re-checked
  24. Annual precipitation: Bolthole Index county data
  25. Share of years in severe drought: Bolthole Index county data
  26. Effective property tax rate: Bolthole Index county data
  27. Median property tax bill: Bolthole Index county data

Written September 27, 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.

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County locator

Grant County in New Mexico

44
County map
Grant County highlighted among the New Mexico counties · colored by Index score

How Grant County scores

Seclusion82100% ev.
Self-Sufficiency2794% ev.
Admin Boringness4668% ev.
Durability28100% ev.
Property Autonomy38100% ev.
Carry Cost89100% ev.

Evidence strength: 93%. This reports direct-source completeness and fallback use; it is separate from the score and is not a confidence interval. How it works →

$180kTypical home
0.5%Property tax
$575Land / acre
15.1"Annual rain
40.9% of yrsSevere drought
13.1 / yr (+10.3)Mid-century 100°F days
41.8 daysMid-century dry spell
1.1" (+7.4%)Mid-century 1-day rain
1.22×Wildfire change factor
100%Forward climate coverage
$1,093Home insurance / yr
-0.2% / yrInsurance growth
1.23%Nonrenewal rate
county median (2+ published ZIPs)Insurance basis
1,528Radius comparison (15 mi)
6.9People / sq mi
47.6%Federal land
53.5%Land at 15% slope or less
2.3%Septic soil without severe limits
21,576 acWorkable land screen
39.8%Wooded land
12.9 tonsBiomass / forest ac
56.4°FAvg temp

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Answers from the rulebook for Grant County

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

Grant County rules

  • Building in a floodplainRequired

    Building construction in Grant County subject to the county floodplain-development process

    • The Grant County building-permit page states CID will not issue a building permit until the Floodplain Development Permit Application process is completed.
    • The appropriate municipality or Grant County Planning Department may provide process information.
    “However, CID will not issue building permits until the Floodplain Development Permit Application process has been completed. Please contact the appropriate municipality or the Grant County Planning Department for more information regarding this process.”

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.”
    One more reviewed finding on this topic
    • Required — Buildings and structures regulated by the New Mexico Residential Code in Grant County
      “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.”
  • Owner-builder exemptionAvailable (with conditions)

    A homeowner requesting a homeowner construction permit for a residential project in Grant County

    • The homeowner must sign the application and notarize the Homeowner’s Responsibilities Form.
    • A homeowner permit may not be used where a GB-2 or GB-98 contractor acts as general contractor.
    • Subcontractors must be licensed and separately permit their work.
    • The homeowner may not perform electrical, plumbing, or mechanical work without applying for and passing the required CID exam.
    “The qualifying party for the licensed contractor requesting the permit or the homeowner requesting a homeowner construction permit must sign the application. The homeowner must also sign and notarize the HOMEOWNER’S RESPONSIBILITIES FORM, FOR BUILDING A HOME OR FOR ALTERATIONS, and REPAIRS OR IMPROVEMENTS TO A HOME WITH A HOMEOWNER'S PERMIT form.”
  • 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.”
    2 more reviewed findings on this topic
    • Adopted (with conditions) — Construction in Grant County subject to New Mexico Construction Industries Division enforcement
      “The Construction Industries Division currently enforces the following codes: 2021 NM [International] Commercial & Residential Building Code; 2021 NM [International] Existing Building Code; 2018 NM [International] Commercial Energy Conservation Code; 2021 NM [Uniform} Mechanical Code (IAPMO); 2021 NM [Uniform] Plumbing Code (IAPMO).”
    • 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.”
  • 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”
    One more reviewed finding on this topic
  • Certificate of occupancyRequired

    Commercial buildings and structures in Grant County subject to the New Mexico building code

    • No building or structure may be used or occupied, and no occupancy classification change may be made, until certification of occupancy is issued under 14.5.3.13 NMAC.
    “No building or structure shall be used or occupied, and no change in the existing occupancy classification of a building or structure or portion thereof shall be made, until the building official has issued a certification of occupancy as provided per 14.5.3.13 NMAC.”
  • 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”
  • 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”
  • 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.”
    One more reviewed finding on this topic
    • State (with conditions) — On-site liquid-waste systems in Grant County
      “Submit to Local NMED Field Office for review. NMED will notify applicant of actions taken on the permit application. Actions may included granting the permit, granting with conditions, or denial.”
  • 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.”
    One more reviewed finding on this topic
    • Required — Installation, modification, or operation of individual liquid-waste systems in Grant County
      “Application – Print and fill out an Application for Liquid Waste Permit, Section 20.7.3.401 NMAC”
  • Septic inspectionRequired

    Permitted on-site liquid-waste systems in Grant County

    • Inspection must be requested from NMED 48 hours, or two business days, in advance.
    • The system must not be covered before inspection.
    • An approved inspection results in a Permit to Operate.
    “Request Inspection by NMED 48 hours (2 business days) in advance (DO NOT COVER BEFORE INSPECTION)”
  • 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.”
  • 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.”
  • 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;”
  • 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.”
  • 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.”
  • Permit feesPublished (with conditions)

    New Mexico liquid-waste permits applicable in Grant County

    • The page labels the schedule as effective 7/1/20.
    • Fees vary by system type and design flow.
    • The page also lists annual operating, reinspection, unpermitted-system, variance, and other fees.

    conventional liquid-waste system up to 1,000 gpd: 225 USD (fee schedule effective 7/1/20) · conventional liquid-waste system 1,001 to 2,000 gpd: 325 USD (fee schedule effective 7/1/20) · conventional liquid-waste system 2,001 to 5,000 gpd: 500 USD (fee schedule effective 7/1/20)

    “Permit Fees (20.7.11 NMAC) Effective 7/1/20”
    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.”
  • Permit processPublished (with conditions)

    State building-permit process applicable to construction in Grant County

    • Applicants must submit the state building-permit application and required project information.
    • Zoning approval may be required before applying for the state building permit.
    • Fees are calculated from project valuation and payment is required before issuance.
    “To obtain a permit, the applicant shall fill out an APPLICATION for STATE BUILDING PERMIT supplied by the Construction Industries Division office.”
    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.”
  • 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;”
  • 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.”

Still unanswered

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

  • County-wide zoning — Countywide zoning in Grant County
  • Local zoning — Aggregate local zoning across Grant County municipalities and unincorporated areas
  • Zoning districts — Published zoning districts in Grant County
  • Minimum dwelling size — Minimum dwelling size in Grant County
  • Minimum lot size — Minimum lot size in Grant County
8 more unanswered
  • Setbacks
  • Lot coverage
  • Building height
  • Living in an RV
  • Camping on your land
  • Accessory dwellings
  • Well permit
  • 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 Grant County

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

Over-appropriated / declining

The aquifer here is over-appropriated and declining. A domestic well is usually still permit-exempt, but long-term supply is a genuine risk.

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 ↗
  • Mimbres Basin (Deming-Columbus Administrative Area)partial of county

    Declared basin managed by block administration with Critical Management Areas and OSE closed areas where 'no unappropriated water exists'; new non-domestic appropriations are denied inside CMAs. A 72-12-1.1 household domestic well is expressly exempt and still permitted (reduced ~20 ft water column assumed).

    NM OSE Deming-Columbus Administrative Area Guidelines ↗
  • Lordsburg 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 guidelines apply block administration with a 1.5 ft/yr allowable water-level decline over 40 years; guidelines expressly exempt 72-12-1.1 domestic wells.

    NM OSE Lordsburg Basin Guidelines (2019) ↗
  • Gila-San Francisco 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. Gila/San Francisco drainages; appropriation and transfer are tightly constrained by the Gila adjudication and the federal Arizona Water Settlements Act.

    NM OSE Article 7 (Declared Underground Water Basins) ↗
  • Hatchita Underground Water Basinlocalized 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. Bootheel OSE-declared basin (Order 163, 2005); new non-domestic appropriations need an OSE permit.

    NM OSE Article 7 (Declared Underground Water Basins) ↗

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 Grant County, New Mexico

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

Grant County scores 44/100 on the Bolthole Index, a marginal county profile. Its strengths: manageable long-term carry cost and sparse surroundings — about 1,528 people within 15 miles. Watch-outs: thin water margin (15.1″/yr rainfall) and elevated mid-century heat, water, rain, or wildfire exposure.

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

Grant County generally requires a residential building permit. Onsite septic is permitted by New Mexico Environment Department (NMED) 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 Grant County, New Mexico?

Land in Grant County runs about $575 per acre, based on the latest county data.

What is the water situation in Grant County?

Grant County gets about 15.1" of rain a year, with severe drought in roughly 40.9% of years. On water rights, Grant County lies in the Mimbres Basin (Deming-Columbus Administrative Area) — Declared basin managed by block administration with Critical Management Areas and OSE closed areas where 'no unappropriated water exists'; new non-domestic appropriations are denied inside CMAs. A 72-12-1.1 household domestic well is expressly exempt and still permitted (reduced ~20 ft water column assumed)..

How remote is Grant County?

A typical private-land location has about 1,528 people within 15 miles and 1,588,152 within 100 miles. These radius catchments are the published fallback where road routing is unavailable.

Off-grid gear

Going off-grid in Grant County means bringing your own water and power. The kit we’d start with:

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How Grant compares in New Mexico

Compare side-by-side →See all 33 New Mexico counties ranked →