Residential Building Permit (New Construction) in Lone Tree, Colorado

Lone Tree requires a residential building permit (new construction) for: Plans must comply with the 2021 IRC/IBC as adopted, and meet the City's Design Criteria: 30 psf ground snow load, 115 mph ULT wind speed (Exposure C), Seismic Design Category B, 36-inch minimum frost depth for foundations; Local amendment Section 105.3.8: a soils test of the building site, prepared by a Colorado-registered professional engineer, must be submitted with the permit application; an engineering geologist's report may additionally be required for hillside or geologically hazardous/steep-slope sites at the Building Official's discretion; If the site falls within a mapped fire-intensity zone under the Colorado Wildfire Resiliency Code, Class I or Class II wildfire mitigation requirements apply to new construction; Applicant must provide an estimated total permit value (materials plus labor) at application; the Building Official may deny an application judged to understate valuation absent supporting detailed estimates; Applications submitted exclusively via the City's Accela Citizen Access online portal; City Use Tax (2.5%) collected on construction materials before permit issuance, per Lone Tree Municipal Code Ch. 4, Art. III, Sec. 120. If your project isn't listed, confirm with City of Lone Tree Community Development Department, Building Division at 720-390-5211 before starting work.

In Lone Tree, the published Building/Mechanical/Electrical/Plumbing Permit Fee — valuation $1.00 to $500.00 is: $23.50. Additional published fees: Permit Fee — valuation $501.00 to $2,000.00 — $23.50 for the first $500 plus $3.05 for each additional $100 or fraction thereof, to and including $2,000.00; Permit Fee — valuation $2,001.00 to $25,000.00 — $69.25 for the first $2,000 plus $14.00 for each additional $1,000 or fraction thereof, to and including $25,000.00; Permit Fee — valuation $25,001.00 to $50,000.00 — $391.75 for the first $25,000 plus $10.10 for each additional $1,000 or fraction thereof, to and including $50,000.00; Permit Fee — valuation $50,001.00 to $100,000.00 — $643.75 for the first $50,000 plus $7.00 for each additional $1,000 or fraction thereof, to and including $100,000.00; Permit Fee — valuation $100,001.00 to $500,000.00 — $993.75 for the first $100,000 plus $5.60 for each additional $1,000 or fraction thereof, to and including $500,000.00; Permit Fee — valuation $500,001.00 to $1,000,000.00 — $3,233.75 for the first $500,000 plus $4.75 for each additional $1,000 or fraction thereof, to and including $1,000,000.00; Permit Fee — valuation $1,000,001.00 and up — $5,608.75 for the first $1,000,000 plus $3.65 for each additional $1,000 or fraction thereof; Plan Review Fee — 65% of the Building Permit Fee, minimum $100.00; City Use Tax — 2.5% of construction materials value; Cherry Creek Basin Water Quality Authority Fee — Varies, set annually by the Authority. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

The City does not publish a specific numeric turnaround time for residential building permit review. Colorado is a home-rule state with no statewide review-time statute, and Lone Tree's Building Division pages, fee schedule, and inspection-scheduling page do not state an SLA for this permit type.

You'll need: Building Permit Application; Soils Test Report; Construction Plan Set. Depending on your project, Lone Tree may also ask for: Engineering Geologist Report. See the required-documents checklist on this page for details on each.

Lone Tree requires 4 inspection(s) for a residential building permit (new construction), in order: Foundation, Framing, Rough Electrical / Plumbing / Mechanical, Final Inspection. Schedule each through City of Lone Tree Community Development Department, Building Division (720-390-5211).

Apply through City of Lone Tree Community Development Department, Building Division at 9220 Kimmer Dr., Suite 100, Lone Tree, CO 80124. Phone: 720-390-5211, email: building@cityoflonetree.com. Office hours: 7:00 AM - 4:00 PM, Monday-Friday, excluding holidays/weekends. Chief Building Official: Matt Archer. Community Development Director: Kelly First (kelly.first@cityoflonetree.com, 720-509-1274). General city line: 303-708-1818.. Official information: https://cityoflonetree.com/community-development/building/.

Lone Tree, Colorado has adopted: 2021 International Building Code (IBC), as amended — City of Lone Tree Design Criteria & Codes page; 2021 International Residential Code (IRC), as amended; 2021 International Fire Code (IFC); 2021 International Plumbing Code (IPC); 2021 International Mechanical Code (IMC); 2021 International Fuel Gas Code (IFGC); 2021 International Energy Conservation Code (IECC); 2023 National Electrical Code (NEC); 2017 ICC A117.1 Accessibility Code; Note on Chapter 18 (Building Regulations), Lone Tree Municipal Code: search-indexed content confirms the City has adopted the International Building Code, 2021 Edition, as amended, with a certified copy on file with the City Clerk; a local amendment adds Section 105.3.8 'Soils Test,' requiring a soils test prepared by a Colorado-registered professional engineer at building permit application, with an engineering geologist additionally required for hillside/geological-hazard/steep-slope sites at the Building Official's discretion. Full text of Chapter 18 could not be independently re-verified beyond this indexed excerpt because library.municode.com/co/lone_tree serves an Angular single-page app shell (empty of code text without JS rendering) and returned HTTP 403 to both a standard fetch and a full-browser-header curl retry — this is a partial-confidence caveat on the amendment-detail level only, not on the base code-edition list, which is independently confirmed on the City's own actively-maintained Design Criteria & Codes page.; HB22-1362 statewide energy floor (Colorado): as of 2026-07-06 (this review date), HB22-1362 requires that municipalities/counties updating their building code adopt an energy code achieving equivalent-or-better performance than the 2021 IECC + Model Electric and Solar Ready Code (effective window 7/1/2023-6/30/2026), stepping up to the Colorado Energy Code Board's Model Low Energy and Carbon Code (published 9/2/2025) as the new statewide minimum for any code update on or after 7/1/2026. Lone Tree's currently-published adopted energy code is the 2021 IECC (per its own Design Criteria & Codes page, most recent update not dated on-page) — this predates the 7/1/2026 Model Low Energy and Carbon Code trigger point and does not itself violate HB22-1362, since that stricter floor applies only when a jurisdiction next updates its code. Flagged honestly rather than assumed; confirm current status with the Building Division (720-390-5211) before relying on this for a 2026-cycle project, since Lone Tree could adopt updated codes at any time.. Local amendments apply — see the Lone Tree overview page for the full list.

The City of Lone Tree Community Development Department, Building Division issues all building, electrical, mechanical, and plumbing permits within city limits. Lone Tree is a home-rule city with its own permitting program, separate from unincorporated Douglas County.