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Change of Use / Change of Occupancy Permit in Castle Rock, Colorado

Required when a tenant space's use, or its IBC occupancy classification, changes without any accompanying construction work. Castle Rock genuinely splits this review into two independently priced tracks: the Building Division charges a flat Change of Occupancy fee (when the occupancy classification itself changes) or a lower Change of Tenancy fee (a pure tenant swap with no occupancy-classification change), while Castle Rock Fire and Rescue separately assesses its own 'Change of Use' plan-check-plus-inspection fee to re-verify fire code compliance for the new use.

Verified 2026-08-13 · Source

When you need this permit

  • No construction is proposed and the occupancy classification changes: Building Division 'Change of Occupancy' review applies ($250.00)
  • No construction is proposed and the occupancy classification does NOT change (a pure tenant swap): Building Division 'Change of Tenancy' review applies instead ($200.00) — the same fee line also documented in this file's Commercial Tenant Improvement Permit entry
  • Separately and in addition, Castle Rock Fire and Rescue conducts its own 'Change of Use' fire-code plan check and inspection to confirm the new use complies with the current International Fire Code as locally amended — this is a distinct fee line item on the Town's own Fire and Rescue Systems and Other Fees schedule, independent of the Building Division fee
  • If actual construction, demolition, or tenant-improvement work accompanies the change of use, the project is instead reviewed under the full Commercial Tenant Improvement Permit (this file's commercial-tenant-improvement-permit entry) rather than this construction-free change-of-use track
  • Food-service changes of use require a separate Douglas County Health Department Retail Food Establishment Program application, independent of both the Town's Building and Fire reviews
  • Application submitted electronically via the eTRAKiT Development Portal, consistent with the Town's other Building Division permits

Required documents

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Fee schedule

Change of Occupancy (Building Division)Town of Castle Rock Development Services Fee Schedule, effective July 1, 2026 — applies when no construction is proposed but the occupancy classification changes
$250.00
Change of Tenancy (Building Division)Fee Schedule effective July 1, 2026 — applies when there is no construction and no occupancy classification change
$200.00
Change of Use — Plan Check (Castle Rock Fire and Rescue)Fire and Rescue Systems and Other Fees, Miscellaneous Fees section
$156.56
Change of Use — Inspection (Castle Rock Fire and Rescue)
$347.31
Change of Use — Combined Total (Castle Rock Fire and Rescue)Fee Schedule effective July 1, 2026 — assessed independently of, and in addition to, the Building Division's Change of Occupancy/Tenancy fee above
$503.87

Review timeline

Plan review
Not published — contact the department

How long did your Change of Use / Change of Occupancy Permit permit actually take in Castle Rock?

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Inspection process

  1. 1

    Fire and Life Safety Change-of-Use Inspection

    Verifies the new use/occupancy against current Fire Code requirements; billed as the Fire Department's separate Change of Use inspection fee

  2. 2

    Building Final (if occupancy classification changes)

    Confirms the space meets applicable building/egress requirements for the new occupancy classification before sign-off

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

Tips

  • Budget for TWO separate fees, not one: the Building Division's $250 Change of Occupancy (or $200 Change of Tenancy) fee, PLUS Castle Rock Fire and Rescue's own separate $503.87 Change of Use plan-check-and-inspection fee — these are two different departments billing independently for the same underlying use change.
  • Whether you owe $250 (Change of Occupancy) or $200 (Change of Tenancy) hinges entirely on whether the IBC occupancy classification itself is changing, not on whether the business name/tenant is changing — confirm which applies with the Building Division before assuming the lower fee.
  • Any actual construction converts this into a full Commercial Tenant Improvement Permit instead of the lighter change-of-use-only track — the two are not interchangeable.

Frequently asked questions

Castle Rock requires a change of use / change of occupancy permit for: No construction is proposed and the occupancy classification changes: Building Division 'Change of Occupancy' review applies ($250.00); No construction is proposed and the occupancy classification does NOT change (a pure tenant swap): Building Division 'Change of Tenancy' review applies instead ($200.00) — the same fee line also documented in this file's Commercial Tenant Improvement Permit entry; Separately and in addition, Castle Rock Fire and Rescue conducts its own 'Change of Use' fire-code plan check and inspection to confirm the new use complies with the current International Fire Code as locally amended — this is a distinct fee line item on the Town's own Fire and Rescue Systems and Other Fees schedule, independent of the Building Division fee; If actual construction, demolition, or tenant-improvement work accompanies the change of use, the project is instead reviewed under the full Commercial Tenant Improvement Permit (this file's commercial-tenant-improvement-permit entry) rather than this construction-free change-of-use track; Food-service changes of use require a separate Douglas County Health Department Retail Food Establishment Program application, independent of both the Town's Building and Fire reviews; Application submitted electronically via the eTRAKiT Development Portal, consistent with the Town's other Building Division permits. If your project isn't listed, confirm with Town of Castle Rock Development Services, Building Division at 720-733-3527 before starting work.

Two department fees typically apply: the Building Division charges $250 (Change of Occupancy, if the classification changes) or $200 (Change of Tenancy, if it doesn't), and Castle Rock Fire and Rescue separately charges its own Change of Use plan-check-and-inspection fee, totaling $503.87, per the Town's own Fee Schedule.

Castle Rock does not publish a plan-review timeline for this permit. Contact Town of Castle Rock Development Services, Building Division at 720-733-3527 for current turnaround.

You'll need: Plan Review and Construction Permit Application (eTRAKiT) — Building; Plan Review and Construction Permit Application — Fire. Depending on your project, Castle Rock may also ask for: Douglas County Health Department Retail Food Application. See the required-documents checklist on this page for details on each.

Castle Rock requires 2 inspection(s) for a change of use / change of occupancy permit, in order: Fire and Life Safety Change-of-Use Inspection, Building Final (if occupancy classification changes). Schedule each through Town of Castle Rock Development Services, Building Division (720-733-3527).

Apply through Town of Castle Rock Development Services, Building Division at 100 N. Wilcox St., Castle Rock, CO 80104. Phone: 720-733-3527, email: buildingcounter@crgov.com. Office hours: Development Services Building Counter (Town Hall): Monday-Friday, 8 a.m. to 5 p.m. Inspection scheduling line: 303-660-1341.. Official information: https://www.crgov.com/1887/Building.

Castle Rock, Colorado has adopted: The Town of Castle Rock is a home-rule municipality that runs its OWN Building Division — it is a separate prequalified building department from Douglas County (confirmed via the Colorado Division of Fire Prevention and Control's Prequalified Building Departments list, which shows both 'Douglas County' and 'Town of Castle Rock' as distinct entries; Joseph Montoya is the Town of Castle Rock's listed prequalified contact, jmontoya@crgov.com, 720-733-2225). Source: Colorado DFPC Prequalified Building Departments list, https://dfpc.colorado.gov/sites/dfpc/files/Current%20Prequalified%20Building%20Departments.pdf; 2024 International Building Code (IBC), as amended by Ordinance No. 2026-017, adopted by Town Council June 2, 2026, effective June 30, 2026 (amending Castle Rock Municipal Code Title 15, Chapter 15.04); 2024 International Residential Code (IRC) for One- and Two-Family Dwellings, as amended by Ordinance No. 2026-017 (Castle Rock Municipal Code Chapter 15.06); 2024 International Plumbing Code (IPC); 2024 International Mechanical Code (IMC); 2024 International Fuel Gas Code (IFGC); 2024 International Fire Code (IFC), enforced by Castle Rock Fire and Rescue Department; 2024 International Existing Building Code (IEBC); 2024 International Swimming Pool and Spa Code (ISPSC); 2021 International Energy Conservation Code (IECC) — Castle Rock has adopted the 2024 editions of most I-Codes but retains the 2021 IECC rather than a newer edition; 2023 Colorado Model Electric-Ready and Solar-Ready Code, adopted by reference as new Castle Rock Municipal Code Chapter 15.15 via Ordinance No. 2026-017; applies to all new residential and commercial buildings and to additions/substantial remodels requiring a building permit; 2026 National Electrical Code (NEC); 2017 ICC A117.1 Accessible and Usable Buildings and Facilities (Ordinance No. 2026-017 adds a new Section 1102, Compliance, specifying the 2017 edition); 1997 Uniform Code for the Abatement of Dangerous Buildings; ASME A17.1-2022 (Safety Code for Elevators and Escalators), ASME A18.1-2020 (Platform Lifts and Stairway Chairlifts), ASME A17.3-2023 (Existing Elevators and Escalators); 2021 Automated People Mover Standards (ASCE 21, Parts 1-4); 2025 Colorado Wildfire Resiliency Code, effective July 1, 2026 (Castle Rock Municipal Code Chapter 15.20, per Ordinance No. 2026-017 amendments); Source for the full current adopted-code list and effective dates: Town of Castle Rock Adopted Building Codes page, https://www.crgov.com/2178/Adopted-Building-Codes, and Ordinance No. 2026-017 (full amendment text), https://www.crgov.com/ArchiveCenter/ViewFile/Item/2870. Local amendments apply — see the Castle Rock overview page for the full list.

Yes. Castle Rock Fire and Rescue lists 'Change of Use' as its own distinct line item on the Fire and Rescue Systems and Other Fees schedule, separate from and in addition to the Building Division's Change of Occupancy/Change of Tenancy review.

Sources & verification

Verified against official sources. Last reviewed 2026-08-13.

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 Castle Rock building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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