How to Choose an ADU Contractor in Colorado (Questions to Ask)
How to hire an ADU contractor in Colorado, the questions to ask, the red flags to avoid, how licensing works here, and modular versus site-built compared.
Dacono’s real rules, taxes and rents — read from the codified ordinance, every figure sourced and dated. Here: a HUD benchmark rent of $1,238/mo for a 1-bed. Run your own numbers below, free.
Read from the Dacono Municipal Code itself — the operative legal text, not a website summary. Dacono is an HB24-1152 subject jurisdiction: since June 30, 2025, state law requires it to allow an ADU wherever it allows a single-family home, with administrative approval — the local standards below still apply.
| Size relative to the main house | 100%verified September 2026Dacono Municipal Code §16-602the ordinance textThe maximum size of an ADU shall not be larger than the size of the principal dwelling unit on the same lot as the ADU. |
| Minimum ADU size | 200 sq ftverified October 2026Dacono Municipal Code §16-602the ordinance text(7) Minimum size. Any accessory dwelling unit constructed after the effective date of this ordinance shall be a minimum of two hundred (200) square feet in floor area. |
| Owner occupancy | Yes, owner must reside on the parcel at time of building-permit application; exception: not required when the ADU is built simultaneously with the principal dwelling unitverified September 2026Dacono Municipal Code §16-602the ordinance textAt the time of application for a building permit for an ADU, the property owner, as reflected in title records and evidenced by voter registration, vehicle registration or other similar means, must reside on the parcel. This Subsection does not apply when an ADU is constructed simultaneous with the principal dwelling unit. |
| Short-term rental | Noverified September 2026Dacono Municipal Code §16-602the ordinance textProhibition on short-term rentals. Short-term (fewer than thirty (30) days) rental of an ADU is prohibited. |
| Setbacks | Rear 5 (or the zone district's rear setback, whichever is less)verified September 2026Dacono Municipal Code §16-602the ordinance textthe rear setback for an ADU shall be the lesser of the rear setback in the of the zone district within which the ADU is located or five (5) feet. |
Source: Dacono Municipal Code, §16-602 · ordinance text retrieved 2026-10-08, re-verified October 2026 · open “the ordinance text” under any figure to read the exact sentence it comes from.
The cap is also relative: an ADU here may not exceed 100% of the main house, so a smaller primary home means a smaller buildable ADU.
Owner occupancy: Yes, owner must reside on the parcel at time of building-permit application; exception: not required when the ADU is built simultaneously with the principal dwelling unit.
Short-term rental of the ADU is not permitted, so the model here is long-term tenancy or family use.
Property tax runs heavier than most of the state here: 118.249 mills total in the example tax area (Weld County tax area 2954), about 31% above the median of the Colorado tax areas we track (levies vary by parcel).
What an ADU adds to the tax bill in Dacono, and the federal benchmark for what it rents for.
Levies: Weld County Assessor, 2025 Mill Levy Report (Tax District and Authority Report) — example: Weld County tax area 2954; levies differ between tax areas inside Dacono; check your parcel with the county assessor. Rates: Colorado DOLA, TY2026 — the 10% reduction on the first $700,000 of value applies to the local-government portion, once per property. Rents: HUD Fair Market Rents, huduser.gov.
Two ways to build the same unit in Dacono. Both figures are all-in — design, permits, foundation, utility connections and installation.
Published Front Range ranges for a comparable one-off build, 2025–26
≈ $2,100–$2,600 / month fully financed
≈ $2,800–$3,500 / month fully financed
Olerra ranges: published all-in project pricing, September 2026 — site preparation, foundation, utility connections and permitting included.
Free and specific to you. Want to go further?
Yes. The Dacono Municipal Code permits accessory dwelling units (§16-602), subject to the size, height, setback and use rules quoted above from the ordinance text. Dacono is also an HB24-1152 subject jurisdiction, so since June 30, 2025 state law requires it to allow an ADU wherever it allows a single-family home, with administrative approval; the local standards above still apply. Zoning district, lot size and setbacks still decide what fits on a specific lot — the free property check confirms yours.
Yes. An ADU is a new dwelling unit, so Dacono requires a building permit (plus any zoning or site-plan review the code calls for) before construction starts. Olerra's all-in price includes permitting, and factory-built units are inspected to the same building code as a site-built home.
No — the ordinance does not permit short-term rental of an ADU here, so plan on long-term tenancy or family use.
Per the ordinance: Yes, owner must reside on the parcel at time of building-permit application; exception: not required when the ADU is built simultaneously with the principal dwelling unit.
A one-off site build with a general contractor typically runs about $500,000–$650,000 for a ~490 sq ft unit. Olerra's factory-built Flex Flats run $300,000–$365,000 (490) and $420,000–$465,000 (735) all-in — site preparation, foundation, utility connections and permitting included.
Roughly $819 per year for every $100,000 of value the ADU adds, in the example tax area shown above: Colorado's TY2026 school (7.05%) and local-government (6.80%) assessment rates on the latest certified (TY2025) levy, a mixed-year estimate. Levies differ between tax areas, so check your parcel with the county assessor.
Same method, each city’s own ordinance. The Colorado hub lists every city, and the statewide ADU calculator covers any Colorado address.
Guides and real Colorado numbers from our team — a fresh pick every couple of weeks, or search for exactly what you need.
How to hire an ADU contractor in Colorado, the questions to ask, the red flags to avoid, how licensing works here, and modular versus site-built compared.
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Planning departments and journalists are welcome to reference this data.
Olerra ADU Cost Calculator — Dacono, CO. Page updated October 9, 2026; rules verified October 2026. https://www.olerra.com/adu-calculator/dacono/ <a href="https://www.olerra.com/adu-calculator/dacono/">Dacono ADU rules & costs</a> Page updated October 9, 2026. The oldest dated figure on the page is from August 25, 2026.
Planning estimates, not quotes or legal advice. Rules, fees, levies and rents change — confirm with the city and your lender before committing. Rules data: codified ordinance as of August 25, 2026, re-verified October 2026. Olerra pricing: published all-in project ranges, September 2026. Corrections: sales@olerra.com.
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