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Commercial Tenant Improvement Permit in Castle Rock, Colorado

Required for interior build-out, remodel or 'white box' finish of tenant spaces in existing commercial buildings in the Town of Castle Rock. This is a genuinely distinct track from new commercial construction: the Town's Development Procedures Manual lists 'Commercial - Tenant Improvement/Remodel/White Box' as its own building permit type (separate from 'Commercial/Multi-Family - Core and Shell'), the Building Division publishes a dedicated Commercial Tenant Improvement submittal checklist (revised 9/2024) alongside a separate Commercial Remodel checklist, and TI reviews carry their own — much faster — published review timeline, including a '10 days total in our hands or it's free' guarantee for spaces under 8,000 sq ft.

Verified 2026-08-02 · Source

When you need this permit

  • Completed application on the eTRAKiT Development Portal (etrakitt9.crgov.com); all submitted documents must be PDFs per the Electronic Submittal Guidelines - Commercial
  • Detailed narrative or scope of work explaining all proposed construction, installation, alterations and demolition
  • Combined and complete sealed Architectural, Structural, Plumbing, Mechanical and Electrical drawings from a Colorado Registered Design Professional, designed to all codes as adopted by the Town
  • Project data must include a full code analysis: construction type, use and occupancy classification, mixed-use strategy, occupant loads, means of egress, fire protection systems, energy compliance path and fixture counts
  • Name of business and address including suite number must appear on the plans
  • Completed Commercial Water Tap Size Certification sealed by a Colorado registered professional engineer, and Plum Creek Water Reclamation Authority approval
  • Food establishments must apply separately through the Douglas County Health Department's Retail Food Establishment Program
  • Fire protection work (sprinkler modifications, alarm, hood systems) is permitted separately through the Castle Rock Fire and Life Safety Division at CRFDFM.com; exterior changes may additionally require Planning approval through the Planning Pre-App Coordinator
  • Contractor must hold a valid ICC-equivalent license, current Town registration and insurance before applying

Required documents

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Fee schedule

Building Permit FeeFee Schedule effective July 1, 2026. The Town's Building Valuation Table does NOT apply to alterations or repairs of existing buildings, so TI valuation is based on actual construction cost rather than the per-sq-ft table
Valuation-based, same table as all building permits: $23.50 minimum; $391.25 at $25,000; $643.75 at $50,000; $993.75 at $100,000 + $5.60 per additional $1,000 to $500,000; $3,233.75 at $500,000 + $4.75 per additional $1,000 to $1,000,000
Plan Review FeeAdditional plan review (if applicable) $125.00 per hour, 1-hour minimum
65% of the Building Permit Fee (not of valuation)
Castle Rock Use TaxPaying use tax at permitting exempts the job from Town and county sales tax on building materials
1/2 valuation x 4.2%
Douglas County Use Tax
1/2 valuation x 1%
Change of OccupancyWhen no construction is proposed but the occupancy classification changes
$250.00
Change of TenancyWhen there is no construction and no occupancy classification change
$200.00
Temporary Certificate of Occupancy
Initial issuance free (expires after 90 calendar days); first and second extensions $500 per 60-day extension; third and up $1,000 per 60-day extension
Re-inspection FeeSame-day/after-hours inspections $125.00 per hour per inspection + $50.00 per hour each additional
$85.00 / $170.00

Review timeline

Plan reviewCastle Rock’s published plan-review target
10–14 business days

How long did your Commercial Tenant Improvement Permit permit actually take in Castle Rock?

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

Inspection process

  1. 1

    Underground / Under-slab Plumbing

    If the TI cuts the slab for new plumbing, inspected independently before cover

  2. 2

    Rough Inspections — Framing, Electrical, Plumbing, Mechanical

    Commercial inspections are scheduled per-discipline as needed; partial inspections are standard operating procedure, so trades do not all have to be ready at once

  3. 3

    Insulation / Energy

    Where the scope touches the envelope or the 2021 IECC compliance path requires it

  4. 4

    Fire and Life Safety Inspections

    Sprinkler/alarm/hood modifications inspected by Castle Rock Fire and Life Safety under separate fire permits; 24-hour notice required (303-660-1066)

  5. 5

    Final Inspections — All Disciplines

    Building and trade finals plus sign-offs from all authorities over the permit (Fire, Health Department for food service, Utilities, etc.)

  6. 6

    Certificate of Occupancy / Completion

    Per the Commercial CO Checklist, issued within 24 hours once all approval letters are in, all authorities have signed off and the inspection card is approved

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

Tips

  • Castle Rock's TI review is unusually fast on paper — the Town guarantees spaces under 8,000 sq ft a complete review within 10 business days 'in our hands or it's free' — but the clock only runs while a complete submittal is with the Town, so incomplete first submittals are what blow the schedule
  • A tenant swap with no construction still needs Town paperwork: a $200 Change of Tenancy permit (no construction, no occupancy change) or a $250 Change of Occupancy permit (occupancy classification changes without construction)
  • If the new use requires a Use by Special Review, the tenant-finish-level Site Development Plan fee is $720 — confirm zoning fit with the Planning Division (303-660-1393) before signing a lease
  • Put the business name and suite number on every plan sheet — it is an explicit checklist item and a common correction
  • Restaurant TIs run three parallel tracks: Building Division (this permit), Castle Rock Fire (hood suppression), and Douglas County Health Department (retail food program) — start the county health application early since it is fully separate
  • Schedule per-discipline partial inspections as areas become ready rather than waiting for all trades — the Town explicitly treats partial commercial inspections as normal procedure

Frequently asked questions

Yes — a $200 Change of Tenancy permit if nothing is built and the occupancy classification stays the same, or a $250 Change of Occupancy permit if the classification changes. Any actual construction triggers the full TI permit.

In Castle Rock, the published Building Permit Fee is: Valuation-based, same table as all building permits: $23.50 minimum; $391.25 at $25,000; $643.75 at $50,000; $993.75 at $100,000 + $5.60 per additional $1,000 to $500,000; $3,233.75 at $500,000 + $4.75 per additional $1,000 to $1,000,000. Additional published fees: Plan Review Fee — 65% of the Building Permit Fee (not of valuation); Castle Rock Use Tax — 1/2 valuation x 4.2%; Douglas County Use Tax — 1/2 valuation x 1%; Change of Occupancy — $250.00; Change of Tenancy — $200.00; Temporary Certificate of Occupancy — Initial issuance free (expires after 90 calendar days); first and second extensions $500 per 60-day extension; third and up $1,000 per 60-day extension; Re-inspection Fee — $85.00 / $170.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Castle Rock's published plan-review target for a commercial tenant improvement permit is 10–14 business days.

You'll need: Tenant Improvement Permit Application (eTRAKiT); Detailed Narrative / Scope of Work; Sealed Combined Plan Set; Supporting Sealed Documents; Commercial Water Tap Size Certification; Plum Creek Water Reclamation Authority Approval. Depending on your project, Castle Rock may also ask for: Douglas County Health Department Application. See the required-documents checklist on this page for details on each.

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.

Yes. The Town lists 'Commercial - Tenant Improvement/Remodel/White Box' as its own permit type, publishes a dedicated TI submittal checklist, and gives TIs their own review timeline (10 business days total under 8,000 sq ft; first comments within 2 weeks over 8,000 sq ft) versus 4 weeks to first comments for new construction/additions.

The initial TCO is issued at no fee and expires after 90 calendar days; extensions cost $500 per 60 days for the first two and $1,000 per 60 days after that.

Castle Rock Fire and Life Safety Division, under separate fire permits submitted directly at CRFDFM.com — the Building Division TI permit does not cover fire protection systems. Food-service tenants also need Douglas County Health Department approval.

Sources & verification

Verified against official sources. Last reviewed 2026-08-02.

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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