Skip to main content
PermitBase

Residential Addition Building Permit in Town of Carbondale, Colorado

Required for additions to existing single-family, duplex, or townhouse structures in Carbondale. Uses the same valuation-based Building Permit fee table as new residential construction, plus Planning Department review (unlike a straight remodel).

Verified 2026-07-19 · Source

When you need this permit

  • Addition to an existing residential structure within Town limits
  • Planning Department approval prior to Building Department review, per the Town's document center ('Residential Addition — After Planning Approval')
  • Impervious Surface Calculations Table and Addition Permit Submittal Guide and Checklist

Required documents

Check off what you have — your progress is saved on this device.

Not ready yet — 0 of 3 required documents checked.

This checker covers one permit. A full project usually triggers several — our paid checklist will assemble all of them, from $29 →

Fee schedule

Building Permit FeeAppendix A, Building Department Fees table.
Per the same valuation-based bracket table as new residential construction (see residential-building-permit)
Plan Review FeeAppendix A, Fee Schedule.
65% of the Building Permit Fee
Town of Carbondale Use TaxAppendix A, Fee Schedule, item 1.
Declared construction material value x 3.5%

Review timeline

Plan reviewTown of Carbondale’s published plan-review target
42–42 business days

How long did your Residential Addition Building Permit permit actually take in Town of Carbondale?

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

Inspection process

  1. 1

    Framing

    Structural framing inspection for the addition.

  2. 2

    Final

    Final building inspection.

See the full Town of Carbondale inspection guide — scheduling & re-inspection fees →

Tips

  • An addition requires Planning Department review (1 week estimated) that a same-scope remodel does not — confirm with Building Department staff (msikes@carbondaleco.net) whether a given project counts as an 'addition' or 'remodel' before budgeting timeline.

Frequently asked questions

Town of Carbondale requires a residential addition building permit for: Addition to an existing residential structure within Town limits; Planning Department approval prior to Building Department review, per the Town's document center ('Residential Addition — After Planning Approval'); Impervious Surface Calculations Table and Addition Permit Submittal Guide and Checklist. If your project isn't listed, confirm with Town of Carbondale Building Department at 970-963-2733 (Town Hall); Inspection line 970-510-1210 (call by 5:00 PM the business day prior to the requested inspection) before starting work.

In Town of Carbondale, the published Building Permit Fee is: Per the same valuation-based bracket table as new residential construction (see residential-building-permit). Additional published fees: Plan Review Fee — 65% of the Building Permit Fee; Town of Carbondale Use Tax — Declared construction material value x 3.5%. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Town of Carbondale's published plan-review target for a residential addition building permit is 42–42 business days.

You'll need: Building Permit Application; Addition Permit Submittal Guide and Checklist; Impervious Surface Calculations Table. Depending on your project, Town of Carbondale may also ask for: Radon - Soils Gas Control (Residential and Commercial). See the required-documents checklist on this page for details on each.

Town of Carbondale requires 2 inspection(s) for a residential addition building permit, in order: Framing, Final. Schedule each through Town of Carbondale Building Department (970-963-2733 (Town Hall); Inspection line 970-510-1210 (call by 5:00 PM the business day prior to the requested inspection)).

Apply through Town of Carbondale Building Department at 511 Colorado Avenue, Carbondale, CO 81623. Phone: 970-963-2733 (Town Hall); Inspection line 970-510-1210 (call by 5:00 PM the business day prior to the requested inspection), email: msikes@carbondaleco.net (Mary Sikes — submit all application documentation in one email as PDF attachments, with the property address in the subject line). Office hours: Town Hall: Monday-Friday, 8:00 AM to 5:00 PM. Fax: 970-963-9140.. Official information: https://www.carbondalegov.org/departments/building/.

Town of Carbondale, Colorado has adopted: 2021 IBC (International Building Code), adopted by Ordinance No. 3/2025 amending Chapter 18 of the Carbondale Municipal Code, effective 7-1-2025, per the Town's Building Department page (carbondalegov.org/departments/building/).; 2021 IRC (International Residential Code), effective 7-1-2025, per the same ordinance.; 2021 IPC (International Plumbing Code), effective 7-1-2025.; 2021 IMC (International Mechanical Code), effective 7-1-2025.; 2021 IECC (International Energy Conservation Code), effective 7-1-2025.; 2021 IEBC (International Existing Building Code), effective 7-1-2025.; 2021 IFGC (International Fuel Gas Code), effective 7-1-2025.; 2021 ISPSC (International Swimming Pool and Spa Code), effective 7-1-2025.; The most current electrical code adopted by the State of Colorado (Carbondale does not maintain its own separately-numbered local electrical code amendment; electrical permitting and inspection in Carbondale is handled by the Colorado State Electrical Board, not the Town — see the 'electrical-permit' entry below).; 2021 IFC (International Fire Code) and the 2025 Colorado Wildfire Resiliency Code (rendered 'CWFC' on the Town's own Building page, elsewhere labeled 'CWRC' and cross-referenced to Municipal Code Article 14) — both became effective 7-1-2026 per the Town's Building Department page, which as of this file's verification date is already in effect (the page's own text is still phrased as 'WILL BE EFFECTIVE 7-1-2026', but that date has now passed).. Local amendments apply — see the Town of Carbondale overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-19.

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 Town of Carbondale building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Town of Carbondale

New Single-Family Dwelling, Duplex, or Townhouse Building PermitResidential Remodel Building PermitNew Commercial Building PermitCommercial Remodel / Tenant Finish PermitCommercial Addition PermitMechanical PermitPlumbing PermitSolar Photovoltaic (PV) PermitRe-roof, Window, and Door Replacement PermitFence PermitDemolition PermitElectrical Permit (State-Issued)EV Charger / EVSE Permit

Residential Addition Building Permit in other cities

South Jordan, UtahWoods Cross, Utah

Compare residential addition building permit fees across Colorado →

Look up this fee in a different city →

Embed this data card →

Now live

Build your Town of Carbondale project checklist

Describe your project once and get every permit, document, and fee it triggers in Town of Carbondale — in one checklist. Sign up and pay once to generate it, or go unlimited with Pro.

Get started →