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Accessory Dwelling Unit (ADU) Permit — Hudson, Colorado · Requirements sheet
Verified 2026-07-23 · Source: https://hudsonco.gov/193/Permits-and-Licenses
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 (ADU) Permit in Hudson, Colorado
Required for accessory dwelling unit development in Hudson. The Town's Permits and Licenses page explicitly lists 'ADU (accessory dwelling unit) development' among residential building-permit application categories, though a distinct ADU-specific fee line or standalone requirements packet was not found separately from the general residential building permit process.
Verified 2026-07-23 · Source
When you need this permit
- Reviewed under the 2018 IRC as locally amended (same code base as other residential construction)
- Subject to Planning Department zoning/land-use review (setbacks, lot coverage) in addition to Building Department plan review, per the Town's general permitting structure separating Zoning and Building review
- Foundation, site plan, and drainage-certificate requirements applicable to new residential construction apply where the ADU is a new structure
Required documents
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Fee schedule
Building Permit Fee (valuation-based, same schedule as new residential construction)No standalone ADU-specific fee line was found; billed under the general Sec. 18-19(a) valuation schedule. Re-chased 2026-07-23 against the Town's current 2026 Fee Schedule (effective 1/1/2026, DocumentCenter View/6464, the actual town-council-resolution-adopted fee document) and the Town's dedicated 'Development Guide: Accessory Dwelling Units (ADUs)' (DocumentCenter View/6585, updated 6/12/26, covering zoning/process/submittal requirements): neither publishes a distinct ADU dollar fee. The Town's live Permits & Licenses page explicitly lists the 'ADU Development Guide' line item's Fee column as 'Variable' under its Residential building-permit fee table, directly confirming ADUs are billed under the general valuation-based schedule rather than an unpublished separate figure.
$35.00 minimum, scaling per the valuation tiers in the Building Permit Fees schedule
Plan Review Fee
60% of Permit Fee
Use Tax
4% of project valuation
Review timeline
Plan reviewHudson’s published plan-review target
7–14 business days
Inspection process
- 1
Foundation
Before concrete pour, if the ADU is a new structure
- 2
Framing
Structural framing complete before cover
- 3
Rough Electrical / Plumbing / Mechanical
Trade rough-ins before concealment
- 4
Final Inspection
All work complete per approved plans
See the full Hudson inspection guide — scheduling & re-inspection fees →
Tips
- Confirm zoning eligibility (lot size, setbacks, occupancy limits) with the Planning Department before submitting a Building Department ADU permit application — these are two genuinely separate review tracks in Hudson.
- No dedicated ADU fee schedule was found separate from the general residential valuation-based fee table — budget using the same tiers as new construction. Confirmed 2026-07-23 against the current 2026 Fee Schedule and the Town's Permits & Licenses page, which lists the ADU line item's fee as 'Variable.'
- Per the Town's ADU Development Guide: ADUs are generally allowed in the R-1, R-2, MU, MUR, and A-2 zone districts, limited to one ADU per primary residence, capped at 1,000 sq ft gross floor area and two bedrooms (one additional bedroom possible if utilities support the demand), and require owner occupancy of either the primary residence or the ADU with a signed occupancy acknowledgement affidavit.
Frequently asked questions
Hudson requires an accessory dwelling unit (adu) permit for: Reviewed under the 2018 IRC as locally amended (same code base as other residential construction); Subject to Planning Department zoning/land-use review (setbacks, lot coverage) in addition to Building Department plan review, per the Town's general permitting structure separating Zoning and Building review; Foundation, site plan, and drainage-certificate requirements applicable to new residential construction apply where the ADU is a new structure. If your project isn't listed, confirm with Town of Hudson Building Department (contracted: ProCode Inc. / SAFEbuilt) at 970-305-3161 (Building Department, ProCode Inc.); 303-536-9311 (Town Hall main line) before starting work.
In Hudson, the published Building Permit Fee (valuation-based, same schedule as new residential construction) is: $35.00 minimum, scaling per the valuation tiers in the Building Permit Fees schedule. Additional published fees: Plan Review Fee — 60% of Permit Fee; Use Tax — 4% of project valuation. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.
Hudson's published plan-review target for an accessory dwelling unit (adu) permit is 7–14 business days.
You'll need: Building Permit Application — ADU scope; Site Plan. See the required-documents checklist on this page for details on each.
Hudson requires 4 inspection(s) for an accessory dwelling unit (adu) permit, in order: Foundation, Framing, Rough Electrical / Plumbing / Mechanical, Final Inspection. Schedule each through Town of Hudson Building Department (contracted: ProCode Inc. / SAFEbuilt) (970-305-3161 (Building Department, ProCode Inc.); 303-536-9311 (Town Hall main line)).
Apply through Town of Hudson Building Department (contracted: ProCode Inc. / SAFEbuilt) at 50 Beech Street (also published as 50 S. Beech Street / P.O. Box 351), Hudson, CO 80642-0351. Phone: 970-305-3161 (Building Department, ProCode Inc.); 303-536-9311 (Town Hall main line), email: jgesick@procodeinc.net (Jonathan Gesick, Chief Building Official). Office hours: Not separately published for the Building Department on the Town's Building Permits & Inspections page; Town Hall main line 303-536-9311, fax 303-536-4753. Inspection requests: online at www.procodeinc.net/inspections-request or by phone 970-305-3161 ext. 1.. Official information: https://hudsonco.gov/166/Building-Permits-Inspections.
Hudson, Colorado has adopted: 2018 International Building Code (IBC), as codified and amended per Hudson Municipal Code Chapter 18, Article I, Sec. 18-2 (Ord. No. 19-13, 7-3-19) — currently in force per the live Municode-codified chapter; 2018 International Residential Code (IRC), Sec. 18-6 (Ord. No. 19-13, 7-3-19) — currently in force; 2018 International Mechanical Code (IMC), Sec. 18-10 (Ord. No. 19-13, 7-3-19) — currently in force; 2018 International Fuel Gas Code (IFGC), Sec. 18-20 (Ord. No. 19-13, 7-3-19) — currently in force; 2018 International Plumbing Code (IPC), Sec. 18-24 (Ord. No. 19-13, 7-3-19) — currently in force; 2012 International Energy Conservation Code (IECC), Sec. 18-28 (Ord. No. 19-13, 7-3-19) — currently in force per the live-codified chapter, though the Town's own DRAFT 2024 amendments propose replacing this with the 2024 IECC (status: not yet adopted as of this review); 2018 International Property Maintenance Code (IPMC), Sec. 18-32 (Ord. No. 19-13, 7-3-19) — currently in force; 2018 International Existing Building Code (IEBC), Sec. 18-36 (Ord. No. 19-13, 7-3-19) — currently in force; 2018 International Swimming Pool and Spa Code (ISPSC), Sec. 18-40 (Ord. No. 19-13, 7-3-19) — currently in force; National Electrical Code: no locally adopted NEC edition found in Chapter 18; IPMC Section 604.2 as amended defers to 'the Electrical Code adopted by the State of Colorado' rather than naming a specific NEC edition — electrical work in Hudson is administered under the Colorado State Electrical Board framework (see localAmendments); IMPORTANT STATUS NOTE — code edition transition in progress but NOT yet finalized: the Town's live Building Permits & Inspections page (hudsonco.gov/166/Building-Permits-Inspections) states the Town 'will adopt the 2024 ICC codes beginning June 2026, including Solar and EV-ready provisions,' and the Town has posted a document titled 'DRAFT 2024 Building Code Amendments' (DocumentCenter View/6523) proposing 2024 editions of IBC/IRC/IMC/IFGC/IPC/IECC(2024)/IPMC/IEBC/ISPSC plus a new Colorado Model Electric and Solar Ready Code, 2023 Edition (Title 31, Article 16, Part 2, C.R.S.) as Sec. 18-43. However, that document is watermarked 'DRAFT' throughout (dated 4/02/2026) and the live, currently-codified Municode text of Chapter 18 (confirmed via search-engine cache of library.municode.com/co/hudson, page directly 403'd to automated fetch) still shows the 2018/2012 editions listed above as being in force via Ord. No. 19-13. Per this project's zero-tolerance policy, the 2024 suite is NOT recorded as adopted until a signed ordinance/Municode update is confirmed; codesAdopted above reflects the current in-force 2018/2012 baseline, with this note flagging the pending transition for the next verification pass.; Separately, the Hudson Fire Protection District (HFPD) — an independent special district, not a Town department — has its own fire-code adoption process. The Town's live Building page states 'The Hudson Fire Protection District Board has adopted the 2024 IFC amendments, with draft documents available for review,' and a scanned board resolution (DocumentCenter View/6549, '2024-IFC-Adoption-Board-Resolution', a Konica Minolta scan dated April 2026) is posted. The underlying scanned PDF could not be OCR'd/text-extracted directly during this research pass (image-only scan, no embedded text layer) and the HFPD's own website (hfpdco.org) does not independently confirm a specific in-force IFC edition on the pages checked. Treated as partial confidence: an HFPD board resolution exists and the Town references it as adopted, but the specific currently-effective IFC edition enforced Town-wide could not be independently corroborated beyond the Town's own page summary.. Local amendments apply — see the Hudson overview page for the full list.
The Town's Permits and Licenses page lists ADU development among its standard residential building-permit categories submitted via the CommunityCore portal; zoning eligibility is a separate Planning Department review.
Sources & verification
Verified against official sources. Last reviewed 2026-07-23.
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 Hudson building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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