Residential Addition / Basement Finish Permit in Keenesburg, Colorado

Keenesburg requires a residential addition / basement finish permit for: Plan review required (not eligible for One-Stop same-day issuance); Plot plan / site plan showing the addition's dimensions and relationship to existing structures and property lines; Architectural and structural plans reflecting the scope (Colorado Licensed Design Professional / Engineer stamps required for structural work per the New Residential Home checklist pattern); Energy code compliance documentation for any new conditioned floor area; Basement finish guide (2018 Basement Guide) covers egress window requirements, ceiling height, and smoke/CO detector placement for below-grade habitable space. If your project isn't listed, confirm with Town of Keenesburg Building Department at 303-732-4281 ext. 2 before starting work.

In Keenesburg, the published Building Permit Fee (same valuation-based schedule as new construction) is: $33.80 minimum, scaling per the valuation tiers in the Building Permit Fee Schedule. Additional published fees: Initial Plan Review Fee — 65% of total permit fees; Use Tax — 3% of gross purchase price of building materials. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Keenesburg does not publish a plan-review timeline for this permit. Contact Town of Keenesburg Building Department at 303-732-4281 ext. 2 for current turnaround.

You'll need: General Building Permit Application. Depending on your project, Keenesburg may also ask for: Residential Basement Finish Guide; Residential One-Story Addition Guide. See the required-documents checklist on this page for details on each.

Keenesburg requires 4 inspection(s) for a residential addition / basement finish permit, in order: Foundation (additions with new footings only), Rough Frame, Rough Electrical / Plumbing / Mechanical, Final Inspection. Schedule each through Town of Keenesburg Building Department (303-732-4281 ext. 2).

Apply through Town of Keenesburg Building Department at 91 W. Broadway Avenue, Keenesburg, CO 80643. Phone: 303-732-4281 ext. 2, email: stevejones@caa.inc. Office hours: As of 6/11/2026, permits are processed and issued on Wednesday and Friday only. Building Official Steve Jones is a contract official with Charles Abbott Associates (CAA), a third-party municipal building-department staffing firm; direct line 720-810-5751. Inspections are usually performed the next business day if the inspection request is submitted by 3:00 p.m., via the Town's online Google Forms-based 'Request an Inspection' portal.. Official information: https://www.townofkeenesburg.com/departments/building_department/index.php.

Keenesburg, Colorado has adopted: 2018 International Building Code (IBC) — Town of Keenesburg Building Department page ('Keenesburg Adopted Building Codes' list); 2018 International Residential Code (IRC); 2018 International Plumbing Code (IPC); 2018 International Mechanical Code (IMC); 2018 International Fuel Gas Code (IFGC); 2018 International Energy Conservation Code (IECC); 2018 International Fire Code (IFC); 2018 International Existing Building Code (IEBC); 2018 International Property Maintenance Code; 2018 International Swimming Pool and Spa Code; 2009 ICC A117.1 Accessible and Usable Buildings and Facilities; 2023 National Electrical Code (NEC) — the only code on the list not on the 2018 cycle; the live Building Department webpage lists 2023 NEC specifically, though the Town's own 'Solar Submittal Requirements' PDF (a separate, older document) still references 2020 NEC in its REFERENCE section — the actively-maintained Building Department webpage's 2023 NEC citation is treated as current per this corpus's policy of preferring the department's live page over a static, undated-revision handout.; Note on HB22-1362 (Colorado's statewide 2021 IECC energy-code floor, phased in via a jurisdiction's next code-adoption cycle rather than a blanket calendar deadline): Keenesburg's actively-maintained Building Department page still lists 2018 IECC as the adopted energy code, with no visible update to 2021 IECC or later. HB22-1362 requires jurisdictions to adopt a qualifying energy code (2021 IECC or equivalent, with electric/EV-ready/solar-ready provisions) only when the jurisdiction next updates ANY of its building codes — it does not retroactively force an update on a fixed date for towns that have not re-adopted since the law passed. No Town of Keenesburg ordinance updating its I-codes past the 2018 cycle (except the NEC swap to 2023) was found on the Town's Ordinances or Resolutions pages after direct review, so 2018 IECC is reported here as the honestly-current adopted code, with this note flagging the HB22-1362 gap rather than assuming compliance or silently upgrading the figure.. Local amendments apply — see the Keenesburg overview page for the full list.

Yes. Basement finishes are listed under 'Residential and Commercial Permits Requiring Plan Review,' not the same-day One-Stop Permit category, and the Town publishes a dedicated Basement Finish building guide covering egress and ceiling-height requirements.