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Residential Addition / Remodel Permit in Firestone, Colorado

Required for additions, basement finishes, and remodels involving structural changes in Firestone. Reviewed under the 2018 IRC as locally amended. Basement Finish/Remodel and Addition are both explicitly listed among the Town's permits requiring plan review.

Verified 2026-07-06 · Source

When you need this permit

  • Basement Finish/Remodel and Addition are explicitly listed as requiring plan review on the Town's own fee schedule
  • One-Story Addition, Basement Finish, and Detached Garage each have a dedicated Town Building Guide (2018 IRC-based, Colorado Chapter ICC template) covering plan submittal basics: smoke/CO alarm requirements, safety glazing at specified locations, heating in all habitable rooms, and electrical service capacity disclosure
  • Window/Door Replacement requiring structural changes also requires plan review (versus the flat-fee non-structural window/door replacement permit)
  • A plot/site plan showing dimensions, relationship to existing structures, and utility line locations (electric, gas, sewer, water) is required — Public Service Utility Notification Center of Colorado (1-800-922-1987) can locate underground utility lines

Required documents

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Fee schedule

Building Permit Fee (same valuation-based table as new construction)Town of Firestone Building Division Fee Schedule (REV 01.2025)
$80 minimum, scaling per the valuation tiers
Plan Review Fee
65% of the Building Permit Fee
Administration Fee: Residential All Other
$25.00

Review timeline

Plan review
Not published — contact the department

How long did your Residential Addition / Remodel 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

    Foundation (if new footings)

    Before concrete pour; crawlspace/basement foundation detail per the Town's Building Guide (steel anchor bolts, rebar, vapor barrier)

  2. 2

    Framing

    Framing and connection to existing structure

  3. 3

    Rough Electrical/Plumbing/Mechanical

    Trade rough-ins before concealment

  4. 4

    Final Inspection

    All work complete per approved plans

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

Tips

  • Additions must not enclose existing bedroom or basement egress windows, per the Town's One-Story Addition Building Guide — confirm egress compliance before finalizing the addition footprint.
  • Existing electric and gas meter locations should be identified early; additions sometimes require a meter relocation or an electric service upgrade — indicate your main breaker size on the plan so the reviewer can flag this before construction starts.
  • Window/door replacement is a flat $132 fee if it involves 10 or fewer openings with no structural changes, but escalates to a full plan-review Addition/Remodel-type permit if structural changes are involved.

Frequently asked questions

Yes. Basement Finish/Remodel is explicitly listed among the permit types requiring plan review on the Town's Building Division Fee Schedule, and has its own dedicated Building Guide (2018 IRC).

In Firestone, the published Building Permit Fee (same valuation-based table as new construction) is: $80 minimum, scaling per the valuation tiers. Additional published fees: Plan Review Fee — 65% of the Building Permit Fee; Administration Fee: Residential All Other — $25.00. 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: Building Permit Application (Online Portal); Site Plan; Floor Plan and Building Section. See the required-documents checklist on this page for details on each.

Firestone requires 4 inspection(s) for a residential addition / remodel permit, in order: Foundation (if new footings), Framing, Rough Electrical/Plumbing/Mechanical, Final Inspection. 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.

Sources & verification

Verified against official sources. Last reviewed 2026-07-06.

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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