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Residential Addition / Remodel Permit (including Basement Finish, Deck, Detached Garage) in Milliken, Colorado

Required for additions, remodels, basement finishes, decks, patio covers, and detached garages in Milliken. Categorized as a 'Residential Permit' under the Town's three-tier review structure, carrying the same 10-14 business day window as new construction.

Verified 2026-07-06 · Source

When you need this permit

  • Permit required for additions, remodels, and basement finishes, per the Town's Residential Building Permit application (purpose-of-permit checkboxes: New Building, Addition, Remodel, Repair, Basement Finish)
  • Decks, patio covers, and detached garages are explicitly listed as 'Residential Permits' on the Building Application Process page
  • Sheds larger than 200 sq ft require a permit (sheds 200 sq ft or less are grouped with the Residential Permit category per the Town's list, implying larger sheds follow the same track; sheds are exempt only via the size threshold, not the permit category)
  • All contractors must be registered with the Town via CommunityCore and be listed on the permit
  • Application requires two plot plans, two sets of building plans, and (for structural work) engineered foundation plans with a Colorado engineer's stamp

Required documents

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Fee schedule

Building Fee — Basement Finish (per sq ft)Town of Milliken Fee Schedule, effective May 1, 2026, Chapter 18, p.7
$45.00
Building Fee — Covered Porch (per sq ft)
$70.00
Building Fee — Covered Patio (per sq ft)
$50.00
Building Fee — Deck (per sq ft)
$35.00
Building Fee — Covered Deck (per sq ft)
$65.00
Building Fee — Patio (per sq ft)
$10.00
Building Fee — Garage (per sq ft)
$55.00
Plan Review — Residential (repeat submittal)
$50.00
Building Permit Admin. Fee
10% of combined Building, Electrical, Construction Meter, and Plan Review fees

Review timeline

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

How long did your Residential Addition / Remodel Permit (including Basement Finish, Deck, Detached Garage) permit actually take in Milliken?

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

Inspection process

  1. 1

    Structural/Framing Rough

    Framing complete before cover

  2. 2

    Electrical Rough / Mechanical Rough / Plumbing Rough

    Trade rough-ins, scope-dependent

  3. 3

    Electrical Final / Mechanical Final / Plumbing Final

    Trade finals

  4. 4

    Final Building

    All work complete per approved plans

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

Tips

  • Milliken's valuation table charges a different per-square-foot rate for each specific addition type (e.g., $35/sq ft for an uncovered deck vs. $65/sq ft for a covered deck vs. $70/sq ft for a covered porch) — confirm which line item matches your exact project scope before budgeting.
  • Sheds of 200 sq ft or less are grouped with the Residential Permit category rather than exempted outright — confirm current permit-exemption thresholds directly with the Building Department before assuming a small shed is permit-free.

Frequently asked questions

Milliken requires a residential addition / remodel permit (including basement finish, deck, detached garage) for: Permit required for additions, remodels, and basement finishes, per the Town's Residential Building Permit application (purpose-of-permit checkboxes: New Building, Addition, Remodel, Repair, Basement Finish); Decks, patio covers, and detached garages are explicitly listed as 'Residential Permits' on the Building Application Process page; Sheds larger than 200 sq ft require a permit (sheds 200 sq ft or less are grouped with the Residential Permit category per the Town's list, implying larger sheds follow the same track; sheds are exempt only via the size threshold, not the permit category); All contractors must be registered with the Town via CommunityCore and be listed on the permit; Application requires two plot plans, two sets of building plans, and (for structural work) engineered foundation plans with a Colorado engineer's stamp. If your project isn't listed, confirm with Town of Milliken Building Department (contracted operations administered by SAFEbuilt, formerly branded ProCode Inc.) at 970-587-4331 (Town Hall / general inquiries); 970-652-5224 (Building Permit Tech / Community Development); 970-305-3161 ext. 1 (Inspections, ProCode/SAFEbuilt) before starting work.

In Milliken, the published Building Fee — Basement Finish (per sq ft) is: $45.00. Additional published fees: Building Fee — Covered Porch (per sq ft) — $70.00; Building Fee — Covered Patio (per sq ft) — $50.00; Building Fee — Deck (per sq ft) — $35.00; Building Fee — Covered Deck (per sq ft) — $65.00; Building Fee — Patio (per sq ft) — $10.00; Building Fee — Garage (per sq ft) — $55.00; Plan Review — Residential (repeat submittal) — $50.00; Building Permit Admin. Fee — 10% of combined Building, Electrical, Construction Meter, and Plan Review fees. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

The Town's own Building Application Process page states Residential Permits (including additions, remodels, and basement finishes) carry a 10-14 business day review window.

You'll need: Residential Building Permit Application; Two Plot Plans; Two Sets of Building Plans. See the required-documents checklist on this page for details on each.

Milliken requires 4 inspection(s) for a residential addition / remodel permit (including basement finish, deck, detached garage), in order: Structural/Framing Rough, Electrical Rough / Mechanical Rough / Plumbing Rough, Electrical Final / Mechanical Final / Plumbing Final, Final Building. Schedule each through Town of Milliken Building Department (contracted operations administered by SAFEbuilt, formerly branded ProCode Inc.) (970-587-4331 (Town Hall / general inquiries); 970-652-5224 (Building Permit Tech / Community Development); 970-305-3161 ext. 1 (Inspections, ProCode/SAFEbuilt)).

Apply through Town of Milliken Building Department (contracted operations administered by SAFEbuilt, formerly branded ProCode Inc.) at 1101 Broad Street, Milliken, CO 80543 (Town Hall / Building Department); ProCode/SAFEbuilt regional office at 39 S. Parish Avenue, Suite 220, Johnstown, CO 80534. Phone: 970-587-4331 (Town Hall / general inquiries); 970-652-5224 (Building Permit Tech / Community Development); 970-305-3161 ext. 1 (Inspections, ProCode/SAFEbuilt), email: bldgdept@millikenco.gov (Building Department); COemail@safebuilt.com (SAFEbuilt general); jgesick@safebuilt.com and jogonzalez@safebuilt.com (Building Officials). Office hours: Monday-Friday, 8 a.m. to 5 p.m., per the Town's Building Department page. Official information: https://millikenco.gov/160/Building.

Milliken, Colorado has adopted: 2024 International Building Code (IBC) — Town of Milliken Inspections & Building Codes page, https://millikenco.gov/163/Inspections-Building-Codes; 2024 International Residential Code (IRC); 2024 International Existing Building Code (IEBC); 2024 International Fuel Gas Code (IFGC); 2024 International Property Maintenance Code (IPMC); 2024 International Mechanical Code (IMC); 2024 International Plumbing Code (IPC); 2024 International Swimming Pool and Spa Code (ISPSC); 2023 National Electrical Code (NEC); 2024 International Energy Conservation Code (IECC); 2024 International Fire Code (IFC); Code Amendments and Adopting — Ordinance No. 834 (adopted December 22, 2025), which brings the Town's codes into alignment with the respective 2024 ICC editions listed above; Milliken Municipal Code, Chapter 18 (Building Regulations). Local amendments apply — see the Milliken 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 Milliken building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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