Bolthole Index

Jefferson County, Colorado

Building permits, zoning and land rules in Arvada, Colorado

Arvada, Colorado requires building permits for most construction, alterations, repairs, changes of use and demolition inside city limits.1 The city administers zoning and has adopted the 2024 International Codes with amendments.23 On Arvada land in Jefferson County, Jefferson County regulates septic systems and may require an onsite wastewater permit; that finding does not cover any Arvada address in Adams County.45

At a glance

Building permit
Required for most construction and alteration work inside Arvada1
Zoning
Administered by the City of Arvada under its Land Development Code2
Septic
Jefferson County regulates systems on the Jefferson County side of Arvada4
RV living
No RV as an accessory use on residential lots; street parking capped at 72 hours in a week6
Tiny homes
State approval still depends on Arvada zoning and site-specific requirements7
Minimum lot size
Varies by zoning district and subdistrict8
Water and sewer work
City permits and inspections are required for installation, repair or disconnection9
Permit fees
City fee schedule published, effective January 1, 202610

Who to call

Building permits

City of Arvada Building Services

City building permits, plan review and building inspections inside Arvada

720-898-7620

8101 Ralston Road, Arvada, CO 80002

Online permits →

Zoning

City of Arvada Community & Economic Development

Planning, zoning and review for compliance with Arvada's Land Development Code

720-898-7435

8101 Ralston Road, Arvada, CO 80002

Septic permits

Jefferson County Public Health - Environmental Health Services

Onsite wastewater treatment system permits and related public-health questions for the Jefferson County portion of Arvada

303-232-6301

100 Jefferson County Parkway, Suite 4500, Golden, CO 80419

Contact details are copied from each office’s official page and were checked against it on October 24, 2026.

Off-grid gear

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

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Do you need a building permit in Arvada, Colorado?

Yes. Inside Arvada, contractors, subcontractors and property owners must obtain a city building permit for new construction and covered alterations, movement, enlargement, replacement, repair, equipment, use or occupancy changes, relocation, removal and demolition.1 Arvada has adopted the 2024 International Codes with city amendments, so approval is based on the city's current code package rather than Jefferson County's rules for unincorporated land.3

A new single-family home, townhome or duplex needs a certificate of occupancy before anyone moves in, after required inspections and final compliance documents are complete.11 The City of Arvada Building Services counter is the right starting point for permit scope, plan review and inspections inside city limits.12 A property owner may apply for a permit, but we could not confirm a city owner-builder exemption from licensing, inspections or code compliance; ask Building Services how the contractor rules apply to the proposed work.

Who issues building permits in Arvada, and how do you apply?

City of Arvada Building Services issues building permits for work inside Arvada and can be reached at 720-898-7620 at 8101 Ralston Road, Arvada, CO 80002.12 Some applications can be filed online and others by email, while paper applications may be delivered to City Hall; permits are not processed over the counter.13 Final plans must be approved, and public improvements built, inspected and accepted under warranty, before permits issue on development projects.13

Fees are based on project specifications, and the city publishes a fee schedule effective January 1, 2026.10 The permit portal requires a login for applications and provides project records, payment and inspection functions.12 For zoning or development review, contact Community & Economic Development at 720-898-7435 at the same City Hall address; its Planning Division evaluates projects against the Land Development Code and Comprehensive Plan.14

Does Arvada have zoning, and what does it control?

Arvada administers its own Land Development Code and zoning districts inside city limits.2 The Residential Neighborhood district alone has 6 subdistricts, so the zoning label attached to the parcel matters before design begins.15 For newly created residential lots in those subdistricts, minimum lot area ranges from 4,000 to 32,500 square feet, and the standards apply to subdivision or resubdivision rather than automatically making an older legal lot unusable.816

The same Residential Neighborhood table sets maximum lot coverage from 25% to 40% and maximum principal-building height from 28 to 35 feet, depending on the subdistrict.1718 Those figures are not citywide averages and should not be applied to a parcel in another district. Ask the City of Arvada Planning Division to confirm the property's district, permitted use and site-specific standards before relying on a concept plan.14

How do septic permits work inside Arvada?

For an Arvada property in Jefferson County that is not served by sewer, Jefferson County regulates the onsite wastewater treatment system.4 A permit may be needed to install a new system, repair or replace an existing system, or make changes that affect it.5 Colorado also requires the applicable local public-health agency to issue an onsite wastewater permit before covered construction, alteration, installation, repair or use when a building is not served by a sewage treatment works.19

Jefferson County also requires an existing septic system installed more than 5 years before a sale to be inspected, with a use permit obtained, before the property sells.20 Contact Jefferson County Public Health at 303-232-6301 for the parcel-specific permit path on the Jefferson County side of Arvada.21 State law requires final inspection after permitted onsite wastewater work is complete and before the system is used.22 The available evidence does not identify the septic authority for any Arvada parcel in Adams County, so owners there should confirm jurisdiction before applying.

Can you live in an RV or tiny home in Arvada?

Arvada's residential land-use rule says a recreational vehicle cannot be used as an accessory use, so an RV is not a substitute backyard dwelling on residential property.6 The same rule also bars a mobile home or manufactured home from being used as an accessory use.6 A major recreational vehicle may not be parked or stored on a city street for more than 72 cumulative hours in any seven-day period, except on state highways.6 In the city's nonresidential and multifamily standards, a mobile home, manufactured home or recreational vehicle cannot be used as the principal building.23 Tents and similar shelters used for habitation are prohibited in the flood fringe sub-zone.24

Colorado approves qualifying tiny homes for long-term living, but plans must receive state approval before construction and the home must still meet local zoning and site requirements.7 That statewide approval does not establish that a tiny home is allowed on every Arvada lot. A dwelling unit in an accessory building is allowed only as Arvada's accessory dwelling unit section expressly permits.25 We could not confirm Arvada's complete tiny-home occupancy rules or a citywide minimum dwelling size; ask the Planning Division about the proposed unit, foundation, use and zoning district before buying land or ordering a home.14

Building a home in Arvada: what are the steps?

  1. Confirm that the address is inside Arvada and ask the Planning Division for the parcel's zoning, permitted residential use, lot standards and any development review.214
  1. Determine how the property will receive water and dispose of wastewater; Arvada requires city permits and inspections for water or sewer service installation, repair and disconnection.9
  1. If the Jefferson County property will use an onsite wastewater system, obtain the required approval from Jefferson County Public Health before building approval proceeds.426
  1. Submit the building-permit application and plans to City of Arvada Building Services through the method required for that project.1312
  1. Complete the required inspections and final compliance documents, then obtain the certificate of occupancy before occupying a new home.11

What should you check before buying land in Arvada?

Start with jurisdiction: the City of Arvada controls building permits and zoning inside city limits, while Jefferson County's building and zoning rules apply to unincorporated county land instead.1227 Verify the parcel's exact city and county before treating any permit answer as final.

Next, get the zoning district and confirm lot status, allowed use, coverage, height and development-review requirements with Arvada Planning.1581718 Confirm water and sewer availability; if the Jefferson County parcel needs an onsite wastewater system, contact Jefferson County Public Health before closing.94 Jefferson County's county-level soil data rates only 5.3% of soils as avoiding severe limitations for a conventional septic drain field, so a site evaluation matters where septic is proposed.28 In Arvada's regulatory floodplain, new homes need the lowest floor, basement and mechanical equipment at least 2 feet above base flood elevation.29 Work in a city right-of-way or easement, including driveway connections, needs City Engineer approval.30 We could not confirm Arvada's rules for private wells, so ask Building Services before planning one.12

Watch-outs

  • Arvada spans more than one county, and the verified Jefferson County septic authority applies only to Arvada land in Jefferson County.4
  • Residential Neighborhood lot size, coverage and height limits vary by subdistrict, so do not apply one subdistrict's figures to another parcel.81718
  • A Colorado-approved tiny home still must satisfy Arvada zoning and site requirements.7
  • Arvada requires a certificate of occupancy before a new single-family home, townhome or duplex may be occupied.11

Sources

  1. Building Permits | Arvada, CO (Arvada), quoted and re-checked
  2. Arvada Land Development Code Sec. 2-1-3-3. RN: Residential neighborhood (Arvada), quoted and re-checked
  3. Building Permits | Arvada, CO (Arvada), quoted and re-checked
  4. Septic Systems (Arvada), quoted and re-checked
  5. Septic Systems (Arvada), quoted and re-checked
  6. Supplemental Standards for Residential Land Uses (Arvada), quoted and re-checked
  7. Consumers of Manufactured Homes and Tiny Homes - HUD (Colorado statewide rule), quoted and re-checked
  8. RN: Residential neighborhood (Arvada), quoted and re-checked
  9. Sewer & Water Service Installations, Repairs, Disconnects (Arvada), quoted and re-checked
  10. Building Fee Schedule | Arvada, CO (Arvada), quoted and re-checked
  11. Building Permits | Arvada, CO (Arvada), quoted and re-checked
  12. City of Arvada Building Services (arvadaco.gov)
  13. Step 4: Construction | Arvada, CO (Arvada), quoted and re-checked
  14. City of Arvada Community & Economic Development (arvadaco.gov)
  15. Arvada Land Development Code Sec. 2-1-3-3. RN: Residential neighborhood (Arvada), quoted and re-checked
  16. RN: Residential neighborhood (Arvada), quoted and re-checked
  17. RN: Residential neighborhood (Arvada), quoted and re-checked
  18. RN: Residential neighborhood (Arvada), quoted and re-checked
  19. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  20. Use Permit Program, quoted and re-checked
  21. Jefferson County Public Health - Environmental Health Services (jeffco.us)
  22. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  23. Arvada Land Development Code Sec. 5-1-6-1. General limitations (Arvada), quoted and re-checked
  24. Arvada Land Development Code Sec. 4-1-2-7. Flood fringe sub-zone standards (Arvada), quoted and re-checked
  25. Arvada Land Development Code Sec. 5-1-5-1. General limitations (Arvada), quoted and re-checked
  26. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  27. Zoning Resolution, quoted and re-checked
  28. 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
  29. Arvada Land Development Code Sec. 4-1-2-7. Flood fringe sub-zone standards (Arvada), quoted and re-checked
  30. Step 4: Construction | Arvada, CO (Arvada), quoted and re-checked

Written October 24, 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.

Answers from the rulebook for Arvada

Arvada’s own rules

  • Building permitRequired

    New construction and listed building work inside Arvada city limits.

    • Most work requires a permit.
    • parameters are not a substitute for project-specific City determination.
    “In fact, most work requires a building permit.”
  • Building code adoptedAdopted (with conditions)

    Construction inside Arvada city limits.

    • 2024 International Codes apply with Arvada amendments.
    “The City of Arvada has adopted the 2024 International Codes with amendments.”
  • Certificate of occupancyRequired

    New single-family homes, townhomes, duplexes, specified occupancy/use changes, tenant finish, new commercial, and multifamily projects inside Arvada city limits.

    • Required inspections and final compliance documents must be completed/provided; issuance can take up to five business days.
    “a certificate of occupancy is required to be issued before occupancy is permitted.”
  • Local zoningPresent (with conditions)

    Land inside Arvada city limits.

    • Applicable district standards govern development.
    “The Residential Neighborhood zoning district is divided into six subdistricts (RN-32.5, RN-12.5, RN-7.5, RN-6, RN-4, and RN-D)”
  • Zoning districtsPublished (with conditions)

    Arvada city limits; cited schedule specifically identifies RN subdistricts.

    • Other zoning districts may apply by parcel.
    “The Residential Neighborhood zoning district is divided into six subdistricts (RN-32.5, RN-12.5, RN-7.5, RN-6, RN-4, and RN-D)”
  • Minimum lot sizeDistrict specific (with conditions)

    Single-family residential lots in the RN district: RN-32.5, RN-12.5, RN-7.5, RN-6, RN-4, and RN-D.

    • The standards apply to creation of new residential lots by subdivision or resubdivision.
    • Existing legally established lots may be treated differently under the code.

    minimum lot area RN-32.5: 32500 square feet · minimum lot area RN-12.5: 12500 square feet · minimum lot area RN-7.5: 7500 square feet · minimum lot area RN-6: 6000 square feet · minimum lot area RN-4: 4000 square feet · minimum lot area RN-D: 6000 square feet

    “Min. Lot Area | 32,500 sf. | 12,500 sf. | 7,500 sf. | 6,000 sf. | 4,000 sf. | 6,000 sf.”
  • Lot coverageDistrict specific (with conditions)

    Single-family residential lots in the RN district, by RN subdistrict.

    • New residential buildings must comply with the table's lot-coverage standards.

    maximum lot coverage: 25-40 percent (RN-32.5 25%; RN-12.5 35%; RN-7.5/RN-6/RN-4/RN-D 40%)

    “Max. Lot Coverage | 25% | 35% | 40% | 40% | 40% | 40%”
  • Building heightDistrict specific (with conditions)

    Single-family residential principal buildings in the RN district, by RN subdistrict.

    • New residential buildings must comply with the table's building-height standards.
    • Existing buildings may be subject to separate nonconformity provisions.

    maximum principal-building height: 28-35 feet (RN-32.5 35 feet; all other listed RN subdistricts 28 feet)

    “Max. Height, Principal Building | 35 ft. | 28 ft. | 28 ft. | 28 ft. | 28 ft. | 28 ft.”
  • Living in an RVLimited

    RV use as a principal or accessory use and RV parking on streets inside Arvada city limits.

    • For nonresidential and multifamily land uses, no recreational vehicle may be used as a principal building.
    • For residential land uses, no recreational vehicle may be used for an accessory use.
    • A major recreational vehicle may not be parked or stored on a street, highway, or roadway for more than 72 cumulative hours within any seven-day period.
    • Street rule does not apply on a state highway within the city.

    maximum street parking/storage: 72 hours within any seven-day period (Cumulative and need not be consecutive; state highways are excluded.)

    “No mobile home, manufactured home, or recreational vehicle shall be used for an accessory use.”
  • Accessory dwellingsLimited

    Accessory buildings and accessory structures on residential-use lots inside Arvada city limits.

    • A dwelling unit in an accessory building or structure is allowed only as expressly allowed by Sec. 5-1-5-2, Accessory Dwelling Units.
    “Except as expressly allowed by Section 5-1-5-2, Accessory Dwelling Units, no dwelling unit shall be located in any accessory structure or accessory building.”
  • Mandatory utility hookupConditional

    Water and sewer service work for properties inside Arvada city limits.

    • Installation, repair, and disconnection of water and sewer services require city permits and inspections.
    • Right-of-way work has additional contractor, traffic-control, locate, and fee requirements.
    “Permits and inspections for the installation, repair or disconnects of water and sewer services are required by the City of Arvada.”
  • Subdividing landRegulated (with conditions)

    Creation of new residential lots by subdivision or resubdivision inside Arvada city limits.

    • RN lot area and lot width standards apply to creation of new residential lots by subdivision or resubdivision.
    “The lot area and lot width standards in Table 2-1-3-3A, Residential Neighborhood Lot and Building Standards, apply to the creation of new residential lots by subdivision or resubdivision.”
  • Driveway accessLimited

    Driveway-related work in a City right-of-way or easement inside Arvada city limits.

    • Applies to work in a right-of-way or easement for City-approved development construction; City Engineer approval is required.
    “A DEV permit is required for work in the right-of-way or easement for any development in the City of Arvada that has been approved by the City Engineer for construction.”
  • Short-term rentalsLimited

    Short-term rentals inside Arvada city limits.

    • An STR is rented for less than 30 nights with a minimum stay of two nights.
    • A City STR permit and business license are required.

    minimum stay: >= 2 nights · rental period: < 30 nights

    “A short-term rental (STR) is a unit rented for a period of less than 30 nights, with a minimum of 2 nights.”
  • Permit feesPublished (with conditions)

    Building permits inside Arvada city limits.

    • Fees are based on project specifications; additional fees may apply.
    • Schedule is effective January 1, 2026.
    “Most Permit fees are based on the project valuation; there are some fees that are a flat rate.”
  • Permit processPublished (with conditions)

    Commercial and residential construction inside Arvada city limits.

    • Final plans must be approved; public improvements must be constructed, inspected, and placed under initial warranty acceptance before permits issue.
    “Permits can only be issued after your final plans are approved and public improvements are constructed, inspected and placed under initial warranty acceptance.”

Rules another office applies inside Arvada

Arvada does not set these itself; the county, a health district or the state does, and they apply to every address inside its limits.

  • Camping on your landProhibited

    Flood fringe sub-zone inside Arvada city limits.

    • Applies to tents and other makeshift structures, enclosures, or similar shelters used for human habitation in the flood fringe sub-zone.
    “Tents and other makeshift structures, enclosures, or other similar shelters used for human habitation are also prohibited in the flood fringe sub-zone.”
  • Manufactured homesLimited

    Nonresidential, vertically mixed-use, and multifamily lots inside Arvada city limits.

    • The cited standard applies to lots developed with nonresidential uses, vertically mixed-use buildings, and multifamily buildings.
    “No mobile home, manufactured home, or recreational vehicle shall be used as a principal building.”
  • Who permits septicCounty (with conditions)

    Arvada city land located in Jefferson County.

    • The source states that Jefferson County regulates septic systems; this claim does not extend to Arvada land in Adams County.
    “Jefferson County regulates septic systems to help make sure they are installed, used and maintained safely.”
  • Septic permitLimited

    New, repaired, replaced, or materially changed OWTS on Arvada land in Jefferson County.

    • The county page says property owners may need a permit; the exact trigger depends on the proposed work.
    “Property owners may need a permit to install a new system, repair or replace an existing system or make changes that affect the system.”
  • Building in a floodplainLimited

    New residential construction and substantial improvements in the Regulatory Floodplain inside Arvada city limits.

    • Lowest floor, basement, mechanical equipment, and attendant utilities must be at or above two feet above base flood elevation; Flood Zone AO has stated alternate elevation/drainage requirements.

    residential flood protection elevation: >= 2 feet above base flood elevation (Additional Zone AO and unavailable-elevation conditions apply.)

    “New construction and substantial improvement of any residential structure within or moved into the Regulatory Floodplain shall have the lowest floor (including the basement and any mechanical equipment or attendant utilities) constructed at or above the flood protection elevation of two feet above the base flood elevation.”

Still unanswered

We looked and could not find an official answer yet. Silence is not permission; ask Arvada or Jefferson County directly.

  • Owner-builder exemption — Owner-built residential construction inside Arvada city limits.
  • Inspections — Building projects inside Arvada city limits.
  • Minimum dwelling size — New dwellings inside Arvada city limits.
  • Tiny homes — Tiny-home occupancy inside Arvada city limits.
  • Septic inspection — Septic systems on Arvada land in Jefferson County.
3 more unanswered
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption

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.

Unanswered questions are usually a sign that Arvada publishes no rule on the point, not that none exists. Jefferson County’s page lists the county offices to call.

← All of Jefferson County: county rules, score and offices