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Residential Addition / Remodel Permit in Timnath, Colorado

Covers home additions, basement finishes, decks, covered patios/porches, pole barns/accessory structures, and similar remodel work in Timnath. Governed by 2018 IRC design guides published by SAFEbuilt/the Town for each project type.

Verified 2026-07-06 · Source

When you need this permit

  • Home Additions: complete set of construction drawings including engineered foundation plans, site plan, floor plan, permit application
  • Basement Finish: submittal requirements per the Town's dedicated Basement Finish Submittal Requirements document and 2024 Basement Finish guide
  • Decks/Uncovered Porches: site plan, house attachment details, guardrail details, footing details, cross-section deck plan, permit application
  • Accessory Structures (sheds, detached garages, pole barns): site plan, construction details, floor plan, permit application; check with Building Department for size thresholds exempt from permits
  • A foundation designed by a licensed Engineer or Architect may be required depending on project specifics
  • General contractor must hold a current Town of Timnath Contractor License and be listed on the permit Contractor

Required documents

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Fee schedule

Base Building Permit FeeAppendix 4-A to Chapter 4 of the Municipal Code; contact buildings@timnathgov.com or 970-224-3211. Valuation for additions/decks calculated via the Town's Valuation Calculator: Additional Floors $150.87/SF, Covered Porch $22.86/SF, Deck $22.86/SF, Covered Deck $45.72/SF, Garage $39.28/SF
Not published online

Review timeline

Plan reviewTimnath’s published plan-review target
15–15 business days

How long did your Residential Addition / Remodel Permit permit actually take in Timnath?

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

Inspection process

  1. 1

    Footings

    After trenches excavated and forms erected, prior to concrete placement

  2. 2

    Frame/Rough Inspection

    After roof, framing, bracing, and fasteners (and any utility rough-ins) are in place

  3. 3

    Final Inspection

    After the structure/addition is completed

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

Tips

  • Timnath's accessory-structure and deck guides are both keyed to the 2018 IRC and specify exact construction details (fastener spacing, sill plate size, footing dimensions) expected in the plan submittal — reviewing the applicable SAFEbuilt-published guide before submitting can materially speed up review.
  • As an 'owner-builder,' the homeowner is the responsible party of record on the permit; hiring a licensed contractor to apply in their own name is recommended to limit liability. Owner-builderContractor
  • A Site Grading Certification is required before Certificate of Occupancy for new residential structures — confirm whether your addition project triggers this requirement.

Frequently asked questions

Generally yes for accessory structures, though the Town's guide notes to check with the Building Department for the specific size threshold below which a structure is exempt from permitting.

In Timnath, the published Base Building Permit Fee is: Not published online. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Timnath's published plan-review target for a residential addition / remodel permit is 15–15 business days.

You'll need: Building Permit Application; Site Plan / Plot Plan; Construction Details / Cross-Section Plan. See the required-documents checklist on this page for details on each.

Timnath requires 3 inspection(s) for a residential addition / remodel permit, in order: Footings, Frame/Rough Inspection, Final Inspection. Schedule each through Town of Timnath Building Services (Community Development Department; building administration contracted to SAFEbuilt Colorado) (970-224-3211).

Apply through Town of Timnath Building Services (Community Development Department; building administration contracted to SAFEbuilt Colorado) at Timnath Town Center, 4750 Signal Tree Drive, Timnath, CO 80547. Phone: 970-224-3211, email: buildings@timnathgov.com. Office hours: Weekdays, 8:00 a.m. to 4:30 p.m. Building Permit Technician direct line 970-449-4639; Building Official direct line 970-566-4674; SAFEbuilt, Inc. inspection line 970-674-1036 (call/email by 4:00 p.m. the prior business day for next-business-day scheduling); SAFEbuilt Colorado regional office 970-686-7511 (561 E. Garden Drive, Unit C, Windsor, CO 80550 — SAFEbuilt's own Northern Colorado office, not a separate Timnath location).. Official information: https://timnath.org/building-and-construction-services/.

Timnath, Colorado has adopted: 2024 International Building Code (IBC), adopted by reference with local amendments — Ordinance No. 19, Series 2025, effective January 1, 2026. Source: Town of Timnath Building and Construction Services page, https://timnath.org/building-and-construction-services/, and https://timnath.org/wp-content/uploads/2026/03/Ord-19-2025.pdf; 2024 International Fire Code (IFC), adopted by reference with local amendments — Ordinance No. 11, Series 2025 and Ordinance No. 23, Series 2025, effective January 1, 2026. Source: https://timnath.org/wp-content/uploads/2026/03/Ord-11-2025.pdf and https://timnath.org/wp-content/uploads/2026/03/Ord-23-2025.pdf; Colorado Wildfire Resiliency Code, adopted with local amendments — Ordinance No. 5, Series 2026, effective July 1, 2026. Source: https://timnath.org/wp-content/uploads/2026/03/Ord-5-2026.pdf; 2018 International Residential Code (IRC), with amendments — per the Town's own 'Design Criteria and Adopted Codes' summary sheet (dated 2023, most recently modified 8/17/2023). Source: https://timnath.org/wp-content/uploads/2023/08/Design-Criteria-and-Adopted-Codes.pdf; 2018 International Energy Conservation Code (IECC), with amendments — same source; 2021 International Plumbing Code (IPC), with amendments — same source; 2018 International Mechanical Code (IMC), with amendments — same source; 2018 International Fuel Gas Code (IFGC), with amendments — same source; 2018 International Existing Building Code (IEBC), with amendments — same source; 2018 International Property Maintenance Code (IPMC), with amendments — same source; 2018 International Swimming Pool and Spa Code (ISPSC), with amendments — same source; 2023 National Electrical Code (NEC), adopted at the State of Colorado level and enforced by the Town — same source; Design guides published by SAFEbuilt/the Town for specific project types (accessory structures, re-roofing, decks/porches, home additions, basement finishes, PV systems) are explicitly keyed to the 2018 IRC, indicating the IRC edition has not yet been updated to 2024 alongside the IBC/IFC. IMPORTANT: the Town's live Building Division page (checked directly, current as of this extraction) names ONLY the 2024 IBC, 2024 IFC, and Colorado Wildfire Resiliency Code as recently updated — it does NOT state that the IRC, IECC, NEC, IPC, IMC, IFGC, IEBC, IPMC, or ISPSC editions have changed from the 2023-dated 'Design Criteria and Adopted Codes' sheet. Confirm current IRC edition directly with Building Services (970-224-3211) before relying on this for a specific project, since the 2023 sheet predates the confirmed 2024 IBC/IFC adoption and may itself be stale for the other codes.; Local amendments to all adopted codes are codified in Timnath Municipal Code Chapter 18 (Building Regulations) via Municode, https://library.municode.com/co/timnath/codes/municipal_code?nodeId=CD_CH18BURE — this page is a JavaScript-rendered CivicPlus codification app that could not be scraped directly in this session; specific amendment text should be pulled from Municode interactively or via the adopting ordinances themselves.. Local amendments apply — see the Timnath overview page for the full list.

Yes — homeowners may act as an 'owner-builder' and apply for the permit themselves, including for all trade work, per the Town's Uncovered Decks & Porches guide.

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

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