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EV Charger / Energy Storage System (ESS) Permit in Firestone, Colorado

Firestone publishes a dedicated 'Firestone Single Family EV Car Charger and/or Energy Storage System' requirements guide (Rev 3.26.2024), distinct from its general Building Guides. New residential EV charging systems and/or energy storage systems use an 'RES inspection type' for all inspections, with specific plan-review submittal items, a 2023-code local amendment requiring a heat detector interconnected to the home's smoke detector system when an attached garage has an EV charger (per NFPA 70 Article 625), and detailed ESS placement/energy-rating rules (IRC Section R327, locally amended). Billed under the same area-based Residential Electrical Permit fee table documented in the electrical-permit entry — no distinct EV/ESS fee line was found on the Fee Schedule.

Verified 2026-07-20 · Source

When you need this permit

  • Submit for plan review: (1) an electrical load calculation for the existing electrical panel, (2) specification documentation for the equipment to be installed, (3) a floor plan showing the location of the proposed equipment and the interconnected heat detector, and (4) a wiring diagram indicating point of connection, overcurrent protection, and wiring sizes/methods
  • Firestone 2023 Code Amendment to IRC R314.2.3: when an attached garage has an EV Power Transfer System car charger installed per NFPA 70 Article 625, a heat detector shall be wired to the home's smoke detector system
  • ESS-specific rules (IRC Section R327, as locally amended): ESS must be listed/labeled per UL 9540 (exempt if listed for residential use and under 1 kWh); individual units maximum 20 kWh; aggregate ratings capped at 40 kWh in utility closets/basements/storage, 80 kWh in garages/exterior walls/outdoors on the ground; minimum 3-foot separation between individual units; specific allowed locations (detached garages/accessory structures, attached garages on exterior walls only, or outdoors 3+ feet from doors/windows) with ESS prohibited in sleeping rooms or closets/spaces opening into sleeping rooms
  • Garage walls/ceilings require minimum 5/8-inch Type X gypsum board per Firestone's amended IRC Table R302.6 dwelling-garage separation table
  • Firestone-reviewed, stamped plans (printed from the online portal) and the permit card MUST be on-site for every required inspection — no inspection will be made without these
  • A document on company letterhead, signed by the master electrician, confirming all lugs and terminals were torqued to manufacturer specifications is required at inspection

Required documents

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Fee schedule

Residential Electrical Permit fee applies (area-based; no distinct EV/ESS line)Town of Firestone Building Division Fee Schedule (REV 01.2025); no separate EV charger or ESS fee line item was found on the fee schedule — EV/ESS installation is billed under the same Residential Electrical Permit table
$141.20 (not more than 1,000 sq ft) to $282.40 (1,501-2,000 sq ft), plus $14.12 per additional 100 sq ft over 2,000 sq ft — same area-based table as the electrical-permit entry

Review timeline

Plan review
Not published — contact the department

How long did your EV Charger / Energy Storage System (ESS) Permit permit actually take in Firestone?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    RES Inspection (single combined inspection type for EV/ESS)

    Confirms type of EV charger, amperage, wire/conduit size and location per approved documentation; minimum 5/8 Type X drywall throughout garage walls/ceilings; heat detector interconnected with smoke detectors; added load does not overload the existing panel; master-electrician torque-compliance letter on file

See the full Firestone inspection guide — scheduling & re-inspection fees →

Tips

  • Firestone treats EV chargers and energy storage systems as the same category — 'Both EV And ESS are Energy storage' per the Town's own guide — and both use the single 'RES inspection type.'
  • Don't skip the heat-detector interconnection requirement: it applies specifically when an EV Power Transfer System charger is installed in an attached garage, per Firestone's 2023 IRC R314.2.3 amendment.
  • ESS units are capped at 80 kWh aggregate in garages/exterior walls/outdoors and 40 kWh in utility closets/basements — confirm your battery system's rating against these locally amended thresholds before submitting plans.
  • No EV/ESS-specific fee line exists — budget using the standard area-based Residential Electrical Permit fee table.

Frequently asked questions

Yes, if the garage is attached to the home. Firestone's 2023 amendment to IRC R314.2.3 requires a heat detector wired to the home's smoke detector system when an attached garage has an Electric Vehicle Power Transfer System car charger installed per NFPA 70 Article 625.

In Firestone, the published Residential Electrical Permit fee applies (area-based; no distinct EV/ESS line) is: $141.20 (not more than 1,000 sq ft) to $282.40 (1,501-2,000 sq ft), plus $14.12 per additional 100 sq ft over 2,000 sq ft — same area-based table as the electrical-permit entry. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Firestone does not publish a plan-review timeline for this permit. Contact Town of Firestone Building Division (plan review/permit administration by Town staff; building inspections contracted to SAFEbuilt Colorado) at 303-833-3291 for current turnaround.

You'll need: Firestone Single Family EV Car Charger and/or Energy Storage System (Building Guide, Rev 3.26.2024); Electrical Permit Application (Online Portal). See the required-documents checklist on this page for details on each.

Firestone requires 1 inspection(s) for an ev charger / energy storage system (ess) permit, in order: RES Inspection (single combined inspection type for EV/ESS). Schedule each through Town of Firestone Building Division (plan review/permit administration by Town staff; building inspections contracted to SAFEbuilt Colorado) (303-833-3291).

Apply through Town of Firestone Building Division (plan review/permit administration by Town staff; building inspections contracted to SAFEbuilt Colorado) at 9950 Park Avenue, Firestone, CO 80504. Phone: 303-833-3291, email: building@firestoneco.gov. Office hours: Monday through Friday, 8 a.m. to 5 p.m. (Town Hall hours); SAFEbuilt Colorado's local office is at 11409 Business Park Circle, Suite 350, Firestone, CO 80504, phone 303-774-1388 (per SAFEbuilt's own site); Firestone-specific SAFEbuilt inspection contact: firestone-building@safebuilt.com / 303-774-0454, and Building Official Tim Moroney, tmoroney@safebuilt.com / 970-545-3555 (per SAFEbuilt/search-indexed contact listing — recommend confirming current staffing directly with the Town before publishing to end users, as this level of detail was not independently re-confirmed on a live SAFEbuilt staff-directory page during this extraction). Official information: https://www.firestoneco.gov/425/Building-Permits-Fees.

Firestone, Colorado has adopted: 2018 International Building Code (IBC), adopted by reference and locally amended as the 'Firestone Building and Construction Code' (FBCC) — Town of Firestone Building Guides page, https://firestoneco.gov/294/Building-Guides, and Ordinance No. 1029, https://firestoneco.gov/DocumentCenter/View/9387; 2018 International Residential Code (IRC), adopted by reference and locally amended; 2018 International Plumbing Code (IPC); 2018 International Mechanical Code (IMC); 2018 International Existing Building Code (IEBC); 2018 International Fuel Gas Code (IFGC); 2018 International Property Maintenance Code (IPMC); 2018 International Swimming Pool and Spa Code (ISPSC); 2018 International Energy Conservation Code (IECC); 2018 International Fire Code (IFC), per Ordinance No. 1029 chapter list (Chapter 15.32); 2023 National Electrical Code (NEC), adopted by reference per Ordinance No. 1029 (replacing the previously-adopted 2020 NEC); Ordinance No. 1029 (adopted following a June 21, 2023 public hearing) repealed and reenacted Firestone Municipal Code Chapters 15.04 (IBC), 15.06 (IRC), 15.08 (NEC), 15.10 (IEBC), 15.12 (IFGC), 15.14 (IMC), 15.16 (IPC), 15.18 (IPMC), 15.32 (IFC), 15.20 (ISPSC), and 15.36 (IECC) — source PDF, https://firestoneco.gov/DocumentCenter/View/9387/1029-AN-ORDINANCE-OF-THE-BOARD-OF-TRUSTEES-OF-THE-TOWN-OF-FIRESTONE-COLORADO. Local amendments apply — see the Firestone overview page for the full list.

Firestone doesn't have a separate EV-only permit type or fee, but it does publish a dedicated 'Firestone Single Family EV Car Charger and/or Energy Storage System' requirements guide with its own plan-review checklist, 2023 code amendments (heat detector interconnection for garage-installed EV chargers), and inspection checklist. The permit itself is processed and billed as a Residential Electrical Permit.

Sources & verification

Verified against official sources. Last reviewed 2026-07-20.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Firestone building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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