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Accessory Dwelling Unit / Accessory Structure Permit — Gilcrest, Colorado · Requirements sheet
Reviewed 2026-07-06 · Source: https://townofgilcrest.org/wp-content/uploads/2018-IRC-Accessory-Structures-Guide.pdf
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Accessory Dwelling Unit / Accessory Structure Permit in Gilcrest, Colorado
Covers accessory structures (sheds, detached garages, and similar) in Gilcrest under the Town's own 2018 IRC 'Accessory Structures' guide (SAFEbuilt, Inc., rev. 5.10.2019). No Gilcrest-specific document naming a distinct 'Accessory Dwelling Unit' (habitable second dwelling) permit category, size threshold, or zoning use-standard was located during this review; this entry is scoped to the accessory-structure permit process the Town does publish, with the ADU-specific gap flagged honestly below rather than invented.
Reviewed 2026-07-06 · Source
When you need this permit
- Site plan showing dimensions and relationship to setback lines, easements, property lines; check with the zoning department for any location/size restrictions applicable to accessory structures
- A survey from a registered land surveyor is required if the project is in a protected area; an as-built survey is required if proposed within 12 inches of a required minimum setback
- Construction details required: foundation detail (Detail A or B per the Town's guide), framing/roof/wall specifications, and floor plan showing whether the space is heated (subject to local energy code requirements for conditioned accessory structures) or unheated
- Check with the Building Department for the size of structures exempt from permits entirely
- As owner-builder, the property owner is the responsible party of record; permits expire if no work is performed for longer than 180 days and are valid for work to begin within six months Owner-builder
Required documents
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Fee schedule
Building Permit Fee (valuation-based, general schedule)No separate flat fee for accessory structures/ADUs was found; billed under the general Building Permit Fee valuation schedule unless the structure qualifies for a listed Single Stop category
Per the 1997 UBC Table 1A-based valuation schedule, starting at $23.00 minimum
Plan Check Fee
30% of Permit Fee
Review timeline
Plan review
Not published — contact the department
Inspection process
- 1
Footings
After trenches excavated, forms erected, prior to placing concrete
- 2
Slab
Prior to placing concrete
- 3
Frame/Rough Inspection
After roof, framing, bracing, and fasteners are in place; includes utility inspections if installed
- 4
Final Inspection
After the structure is completed
See the full Gilcrest inspection guide — scheduling & re-inspection fees →
Tips
- Gilcrest's own published materials cover accessory STRUCTURES (sheds, detached garages) in detail, but no Town-published document located during this review specifically addresses a habitable Accessory Dwelling Unit (a second dwelling unit with its own kitchen/bath) as a distinct zoning or permit category — confirm directly with the Planning & Zoning Department (970-737-2426) whether ADUs are a permitted use in your zone district and what additional zoning-use requirements (beyond the building-permit process captured here) would apply before planning a habitable ADU project.
- Check with the Building Department for the size threshold below which an accessory structure is exempt from a permit entirely — this exemption size was referenced but not quantified in the Town's own guide.
Frequently asked questions
Gilcrest requires an accessory dwelling unit / accessory structure permit for: Site plan showing dimensions and relationship to setback lines, easements, property lines; check with the zoning department for any location/size restrictions applicable to accessory structures; A survey from a registered land surveyor is required if the project is in a protected area; an as-built survey is required if proposed within 12 inches of a required minimum setback; Construction details required: foundation detail (Detail A or B per the Town's guide), framing/roof/wall specifications, and floor plan showing whether the space is heated (subject to local energy code requirements for conditioned accessory structures) or unheated; Check with the Building Department for the size of structures exempt from permits entirely; As owner-builder, the property owner is the responsible party of record; permits expire if no work is performed for longer than 180 days and are valid for work to begin within six months. If your project isn't listed, confirm with Town of Gilcrest Planning & Zoning / Building Department (building inspection services contracted to SAFEbuilt, Inc.) at 970-737-2426 before starting work.
In Gilcrest, the published Building Permit Fee (valuation-based, general schedule) is: Per the 1997 UBC Table 1A-based valuation schedule, starting at $23.00 minimum. Additional published fees: Plan Check Fee — 30% of Permit Fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.
Gilcrest does not publish a plan-review timeline for this permit. Contact Town of Gilcrest Planning & Zoning / Building Department (building inspection services contracted to SAFEbuilt, Inc.) at 970-737-2426 for current turnaround.
You'll need: Town of Gilcrest Building Permit Application; Site Plan; Construction Details and Floor Plan. See the required-documents checklist on this page for details on each.
Gilcrest requires 4 inspection(s) for an accessory dwelling unit / accessory structure permit, in order: Footings, Slab, Frame/Rough Inspection, Final Inspection. Schedule each through Town of Gilcrest Planning & Zoning / Building Department (building inspection services contracted to SAFEbuilt, Inc.) (970-737-2426).
Apply through Town of Gilcrest Planning & Zoning / Building Department (building inspection services contracted to SAFEbuilt, Inc.) at 304 8th Street, Gilcrest, CO 80623. Phone: 970-737-2426, email: hana@townofgilcrest.org. Office hours: Monday-Friday 10:00 AM - 6:00 PM; Saturday 10:00 AM - 2:00 PM (Town Hall, 304 8th Street). Building inspection services are provided under contract by SAFEbuilt, Inc. (3755 Precision Drive, Suite 140, Loveland, CO 80538; main line 866-977-4111); inspection scheduling is handled via the inspection line printed on the issued permit card, not the Town's general office line.. Official information: https://townofgilcrest.org/departments/planning-zoning/.
Gilcrest, Colorado has adopted: 2018 International Residential Code (IRC) — confirmed as the operative residential code from the title block of the Town's own SAFEbuilt-published 'Building Guides for Homeowners' series (Re-Roofing, Additions to Single Family Dwellings, Accessory Structures, Patio Covers/Carports, Decks, Pole Barns, Window Replacement, Swimming Pools — all titled '2018 IRC' and published/revised 5.10.2019), which are the Town's own currently-linked permitting handouts as of this review; National Electrical Code: the Town's own 'Residential Electrical Wiring Guidelines' handout (SAFEbuilt Colorado, last revised 1/28/2010) cites 2008 NEC provisions (e.g., tamper-resistant receptacle requirements) and the Manufactured Housing Installation Permits handout separately states manufactured-home electric service 'shall be installed in accordance with 2008 National Electric Code (NEC)' — this is the most recent NEC edition citation found in any Town-published document; it is materially older than current NEC practice elsewhere in this corpus (2020/2023 cycles), and no more recent Town-published NEC edition citation could be located after checking the Building Permit Application, the Electrical Permit Resolution (2016-12), and both Contemporaneous Review Guidelines documents, none of which state a NEC edition themselves; Building Permit Fee valuation table: the Town's 'Building Inspection and Plan Review Fees' handout (undated, current as of this review since it is reproduced verbatim as an exhibit to the Amended 2025 Fee Schedule effective 5/1/2025) explicitly states fees are 'Based on Table 1A of the 97 Uniform Building Code' (i.e., the 1997 Uniform Building Code, a legacy pre-IRC/IBC code family) — this is a fee-calculation table only, not a statement that Gilcrest enforces 1997 UBC construction/life-safety provisions; the same handout separately states project valuations are based on 'the most current Building Valuation Data published by the International Code Council,' which is inconsistent with a static 1997-vintage fee table and is flagged here rather than silently reconciled; No IBC, IECC, IMC, IPC, or IFGC edition is cited in any Town-published document located during this review (Building Permit Application, all SAFEbuilt-branded IRC guide handouts, both fee schedules, both Contemporaneous Review Guidelines, the Electrical Permit Resolution, and the Mobile Home Permit Handout & Procedures) — Gilcrest's own published materials are residential/IRC-focused and do not name a commercial building/mechanical/plumbing/fuel-gas code edition; a plumbing code edition is likewise not stated, though the Plumber Contemporaneous Review Guidelines confirm plumbing permits are locally administered; Colorado is a home-rule state with no statewide-mandated building code edition; Gilcrest is a statutory (non-home-rule) town, so its own municipal code and adopted-code ordinance would govern, but the Town's Municipal Code (hosted on Municode) returned a 403 error on every direct access attempt during this review and could not be independently verified as a supplementary source for code-adoption ordinance language — see tipsAndGotchas for the chase trail; HB22-1362 statewide energy code floor (2021 IECC + electric-readiness/EV-ready/solar-ready requirements, effective window July 2023-July 2026): no Town-published document reviewed states an adopted IECC edition or references HB22-1362 compliance; the 2018 IRC guide series (Home Additions, Accessory Structures) does reference 'Energy Code Compliance Report (www.energycodes.gov) or REScheck calculations' as a required submittal item, which points toward some energy-code enforcement in practice, but no specific IECC edition or HB22-1362 statement was found in any Gilcrest-published source. This should be treated as an open item pending direct confirmation from the Building Department (970-737-2426) rather than assumed either way.. Local amendments apply — see the Gilcrest overview page for the full list.
No Gilcrest-published document reviewed (Planning & Zoning page, Doing Business/Forms page, Accessory Structures guide, zoning map, Municipal Code index) specifically names an ADU permit category or zoning standard distinct from a general accessory structure. Confirm directly with the Planning & Zoning Department whether an ADU is a permitted use in your zone district.
Sources & verification
Key facts 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 Gilcrest building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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