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Accessory Dwelling Unit (ADU) Permit in Gypsum, Colorado

Required for construction of a new Accessory Dwelling Unit, or to bring an existing non-approved ADU into compliance, on a single-family lot in Gypsum. Processed alongside a standard Building Permit for the structure itself, plus a dedicated ADU application, deed restriction, and utility documentation.

Verified 2026-07-06 · Source

When you need this permit

  • Maximum size: 800 sq ft or 50% of the primary dwelling's floor area, whichever is smaller
  • Only one ADU permitted per lot; not permitted in multi-family or mobile home park settings
  • Allowed forms: detached, attached, interior (upper or lower unit), above-garage, or garage conversion; mobile homes, travel trailers, and RVs are prohibited as an ADU
  • Property owner must reside on-site; the ADU cannot be subdivided or sold separately from the primary home
  • Maximum two parking spaces per ADU, in a garage or driveway (limited on-street exception)
  • Separate trash service subscription required for the ADU
  • Water/sewer: monthly service fee applies; septic/well documentation required if Town water/sewer service is unavailable
  • Upon sale of the property, the new owner must complete a transfer of the ADU's deed restriction and records (typically handled by the realtor)

Required documents

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Fee schedule

New ADU Construction FeeTown of Gypsum Accessory Dwelling Units page
$250
Existing Non-Approved ADU (bring into compliance)
$500
Transfer of Existing Approved ADU (new owner)
$50 re-inspection fee
Deed Restriction Recording
$43
Trash Service Setup
$110 (container plus monthly fee)
Building Permit Fee (for the ADU structure itself)Same valuation-table gap as the general Residential Building Permit
Not published in any fetchable Town document as of this review

Review timeline

Plan review
Not published — contact the department

How long did your Accessory Dwelling Unit (ADU) Permit permit actually take in Gypsum?

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

Inspection process

  1. 1

    Standard Building Permit Inspection Sequence

    Follows the same footing/foundation/rough-in/final sequence as new construction or an addition, depending on ADU type (detached, attached, garage conversion, etc.)

  2. 2

    Re-inspection (ADU transfer)

    Required when an existing approved ADU transfers to a new owner

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

Tips

  • Both the property owner AND a tenant can be fined for leasing an unpermitted ADU in Gypsum — verify any existing ADU on a property you're purchasing has been formally approved, not just built.
  • An ADU deed restriction must be transferred at time of sale — this is a real, separate recording step ($43 fee) that a standard title transfer will not automatically catch; flag it for your realtor.
  • Only one ADU is allowed per lot regardless of lot size, and mobile homes/RVs/travel trailers can never qualify as the ADU structure itself.

Frequently asked questions

Gypsum requires an accessory dwelling unit (adu) permit for: Maximum size: 800 sq ft or 50% of the primary dwelling's floor area, whichever is smaller; Only one ADU permitted per lot; not permitted in multi-family or mobile home park settings; Allowed forms: detached, attached, interior (upper or lower unit), above-garage, or garage conversion; mobile homes, travel trailers, and RVs are prohibited as an ADU; Property owner must reside on-site; the ADU cannot be subdivided or sold separately from the primary home; Maximum two parking spaces per ADU, in a garage or driveway (limited on-street exception); Separate trash service subscription required for the ADU; Water/sewer: monthly service fee applies; septic/well documentation required if Town water/sewer service is unavailable; Upon sale of the property, the new owner must complete a transfer of the ADU's deed restriction and records (typically handled by the realtor). If your project isn't listed, confirm with Town of Gypsum Community Development Department, Building Department at 970-524-1731 before starting work.

In Gypsum, the published New ADU Construction Fee is: $250. Additional published fees: Existing Non-Approved ADU (bring into compliance) — $500; Transfer of Existing Approved ADU (new owner) — $50 re-inspection fee; Deed Restriction Recording — $43; Trash Service Setup — $110 (container plus monthly fee); Building Permit Fee (for the ADU structure itself) — Not published in any fetchable Town document as of this review. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Gypsum does not publish a plan-review timeline for this permit. Contact Town of Gypsum Community Development Department, Building Department at 970-524-1731 for current turnaround.

You'll need: ADU Application / Summary Letter; Site Plan; Building Permit; ADU Deed Restriction Form; ADU Water, Sewer & Trash Form. Depending on your project, Gypsum may also ask for: ADU Deed Restriction Transfer Form. See the required-documents checklist on this page for details on each.

Gypsum requires 2 inspection(s) for an accessory dwelling unit (adu) permit, in order: Standard Building Permit Inspection Sequence, Re-inspection (ADU transfer). Schedule each through Town of Gypsum Community Development Department, Building Department (970-524-1731).

Apply through Town of Gypsum Community Development Department, Building Department at 50 Lundgren Blvd, Gypsum, CO 81637 (mailing: PO Box 130, Gypsum, CO 81637). Phone: 970-524-1731, email: stephanie@townofgypsum.com. Office hours: Building Department Staff available Monday-Friday, 8 a.m.-5 p.m., per the Building Permit Application page. Primary staff contact listed: Stephanie Roybal, Building Department Administrative Assistant. General Town phone line also published as 970-524-7514 on several Building Department sub-pages (DRB/HOA Review, Hours & Site Conditions).. Official information: https://www.townofgypsum.com/build-in-gypsum.

An ADU in Gypsum is capped at 800 square feet or 50% of the primary dwelling's floor area, whichever is smaller, and only one ADU is permitted per lot.

Yes. Per the Town's Accessory Dwelling Units page, the property owner must reside on-site, and the ADU cannot be subdivided or sold separately from the primary home.

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

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Accessory Dwelling Unit (ADU) Permit in other cities

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