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
An RV cannot be used as an accessory use on residential land6
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

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 10, 2026.

Off-grid gear

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

These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.

Do you need a building permit in 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.10 The City of Arvada Building Services counter is the right starting point for permit scope, plan review and inspections inside city limits.11 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 80002.11 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.12

Permits that do not need plan review are typically issued within 3 business days after a complete application, while the first review for major projects may take 4 to 6 weeks.12 The permit portal requires a login for applications and provides project records, payment and inspection functions.11 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.13

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.14 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.815

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.1617 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.13

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.18

Contact Jefferson County Public Health at 303-232-6301 for the parcel-specific permit path on the Jefferson County side of Arvada.19 State law requires final inspection after permitted onsite wastewater work is complete and before the system is used.20 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 In the city's nonresidential and multifamily standards, a mobile home, manufactured home or recreational vehicle cannot be used as the principal building.21

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. 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.13

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.213
  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.422
  1. Submit the building-permit application and plans to City of Arvada Building Services through the method required for that project.1211
  1. Complete the required inspections and final compliance documents, then obtain the certificate of occupancy before occupying a new home.10

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.1223 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.1481617 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.24 Finally, development in a regulatory floodplain must meet local rules at least as strict as federal minimum design and construction criteria.25

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.81617
  • 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.10

Sources

  1. Building Permits (Arvada), quoted and re-checked
  2. RN: Residential neighborhood (Arvada), quoted and re-checked
  3. Building Permits (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 Permits (Arvada), quoted and re-checked
  11. City of Arvada Building Services (arvadaco.gov)
  12. Building Permits (Arvada), quoted and re-checked
  13. City of Arvada Community & Economic Development (arvadaco.gov)
  14. RN: Residential neighborhood (Arvada), quoted and re-checked
  15. 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. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  19. Jefferson County Public Health - Environmental Health Services (jeffco.us)
  20. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  21. library.municode.com (Arvada), quoted and re-checked
  22. Title 25 - Public Health and Environment - Colorado Revised Statutes 2024 (Colorado statewide rule), quoted and re-checked
  23. Zoning Resolution, quoted and re-checked
  24. 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
  25. SB24-179 Floodplain Management Program (Colorado statewide rule), quoted and re-checked

Written October 10, 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

    Construction, alteration, demolition, change of use, change of occupancy, or repair of buildings and accessories inside Arvada.

    • A permit grants permission for the described work; project-specific permit requirements vary.
    “Contractors, subcontractors, and property owners are required by law to pull a permit for new construction projects, alterations, movement, enlargement, replacement, repair, equipment, use and occupancy, location, removal, and demolition.”
  • Building code adoptedAdopted

    Building construction inside Arvada city limits.

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

    New single-family homes, townhomes, duplexes, change-of-use permits, changes of occupancy, tenant finishes, new commercial buildings, and multifamily buildings inside Arvada.

    • The certificate must be issued before occupancy is permitted.
    • Issuance can take up to five business days.
    • Required inspections and final compliance documents must be complete.
    “For New Single Family homes, townhomes, duplexes, change of use permits, changes of occupancy, tenant finish permits, new commercial buildings, and multifamily buildings a certificate of occupancy is required to be issued before occupancy is permitted.”
  • Local zoningPresent

    Land inside Arvada city limits; the city administers its own Land Development Code and zoning districts.

    “The purpose of the Residential Neighborhood (RN) zoning district is to maintain the character of mature, established neighborhoods in locations where residents expect that the character be relatively stable and allow development, redevelopment, and/or public projects that are consistent with a neighborhood's architectural character.”
  • Zoning districtsPublished

    Arvada zoning districts, including the RN residential district and its six subdistricts.

    • The RN district has subdistricts RN-32.5, RN-12.5, RN-7.5, RN-6, RN-4, and RN-D.
    • The supplied code section is not the complete city zoning-district inventory.
    “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) in order to reflect and preserve the existing development patterns within each subdistrict, while allowing for redevelopment and expansions of existing buildings at scales that are not disruptive of the surrounding neighborhood fabric.”
  • 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.”
  • Manufactured homesLimited

    Manufactured-home occupancy inside Arvada city limits.

    • A manufactured home may not be used as a principal building in the nonresidential and multifamily land-use standards section.
    • A manufactured home may not be used for an accessory use in residential land-use standards.
    • Manufactured homes in the regulatory floodplain have additional elevation, anchoring, and park/subdivision conditions.
    “No mobile home, manufactured home, or recreational vehicle shall be used as a principal 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.”
  • Permit processPublished (with conditions)

    Arvada building permit applications.

    • Some applications are online and others by email.
    • Paper applications may be dropped at City Hall.
    • Permits are not processed over the counter.
    • eTRAKiT requires a login.
    • Permits not requiring plan review are typically issued within three business days; major projects require plan review and the first review may take four to six weeks.

    typical issuance without plan review: 3 business days (Completed application submission) · first plan review for major projects: 4-6 weeks (New single-family and commercial projects)

    “Permits that do not require a plan review are typically issued within three business days of a completed application submission.”

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.

  • 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.”

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-performed building work inside Arvada.
  • Inspections — Building projects inside Arvada city limits.
  • Minimum dwelling size — Single-family residential development inside Arvada city limits.
  • Tiny homes — Tiny-home occupancy inside Arvada city limits.
  • Accessory dwellings — Accessory dwelling units inside Arvada city limits.
5 more unanswered
  • Septic inspection
  • Off-grid sanitation
  • Well permit
  • Agricultural exemption
  • Driveway access

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