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.
Pueblo’s real rules, taxes and rents — read from the codified ordinance, every figure sourced and dated. Here: ADUs up to 800 sq ft, rents floored at $967/mo. Run your own numbers below, free.
Read from the Pueblo Code Of Ordinances itself — the operative legal text, not a website summary. Pueblo is an HB24-1152 subject jurisdiction: since June 30, 2025, Colorado law guarantees one ADU by right on any lot with a single-family home here.
| Maximum ADU size | 800 sq ftverified September 2026Pueblo Code Of Ordinances §17-4-16the ordinance textThe gross floor area of the accessory dwelling unit shall not exceed one hundred percent (100%) of the gross floor area of the one-family residence on the same lot or eight hundred (800) square feet, whichever is less. |
| Size relative to the main house | 100%verified September 2026Pueblo Code Of Ordinances §17-4-16the ordinance textThe gross floor area of the accessory dwelling unit shall not exceed one hundred percent (100%) of the gross floor area of the one-family residence on the same lot or eight hundred (800) square feet, whichever is less. |
| Owner occupancy | Yes, but only at time of application: owner must demonstrate occupancy of the lot when applying to build or convert an ADU (e.g., utility bill, mail, or bank statement dated within 12 months); no ongoing occupancy requirement thereafter.verified September 2026Pueblo Code Of Ordinances §17-4-16the ordinance textThe owner of a lot must demonstrate occupancy of the lot when an application is submitted to construct a new accessory dwelling unit on a lot that already contains a one-family residence or to convert part of an existing one-family residence into an accessory dwelling unit. Proof of occupancy may include, but not be limited to, a computer-generated utility or medical bill, first-class mail, or bank statement that includes the subject property address and is dated within 12 months of applying to construct or convert an accessory dwelling unit. |
| Extra parking | Conditional (0 or 1)verified September 2026Pueblo Code Of Ordinances §17-4-16the ordinance textOne (1) off-street parking space shall be provided in connection with the construction or conversion of an accessory dwelling unit if all three conditions are met |
| Setbacks | Rear: 5 ft (detached ADUs 16 ft or lower in height only); attached ADUs and detached ADUs over 16 ft must meet the zone district's minimum rear-yard setback. Front and side setbacks follow zone district minimums for all ADUs.verified September 2026Pueblo Code Of Ordinances §17-4-16the ordinance textDetached accessory dwelling units sixteen (16) feet or lower in height may be placed as close as five (5) feet to the rear property line. A detached accessory dwelling unit higher than sixteen (16) feet shall comply with the minimum rear-yard setback requirements of the zone district. Attached accessory dwelling units shall comply with the minimum rear-yard setback requirements of the zone district. All accessory dwelling units shall comply with the minimum front-yard and side-yard setback requirements of the zone district. |
Source: Pueblo Code Of Ordinances, §17-4-16 · ordinance text retrieved 2026-08-25, re-verified September 2026 · open “the ordinance text” under any figure to read the exact sentence it comes from.
Pueblo’s size cap is conditional rather than a single number: 800 — worth reading closely before sizing a unit.
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.
The owner must live on the property (main house or ADU) — common across Colorado (11 of the 14 codes we’ve read require it), and the rule that most often shapes rental plans. Parking: conditional (0 or 1).
What an ADU adds to the tax bill in Pueblo, and the conservative floor on what it rents for.
Levies: Pueblo County Assessor - 2025 Tax Groups (mill levy by tax district). 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 Pueblo. 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 Pueblo Code Of Ordinances permits accessory dwelling units (§17-4-16), subject to the size, height, setback and use rules quoted above from the ordinance text. Pueblo is also an HB24-1152 subject jurisdiction, so since June 30, 2025 state law requires one ADU to be allowed on any lot with a single-family home. 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 Pueblo 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.
Per the Pueblo Code Of Ordinances: 800 sq ft. Both Olerra Flex Flats — the 490 and the 735 — are designed to fit typical Colorado caps; check the rules table above for the exact ordinance text.
Per the ordinance: Yes, but only at time of application: owner must demonstrate occupancy of the lot when applying to build or convert an ADU (e.g., utility bill, mail, or bank statement dated within 12 months); no ongoing occupancy requirement thereafter..
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 $639 per year for every $100,000 of value the ADU adds, using the local mill levy split across Colorado's TY2026 school (7.05%) and local-government (6.80%) assessment rates.
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 — Pueblo, CO. Data updated August 25, 2026. https://www.olerra.com/adu-calculator/pueblo/ <a href="https://www.olerra.com/adu-calculator/pueblo/">Pueblo ADU rules & costs</a> Data as of August 25, 2026, the oldest figure on the page.
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 September 2026. Olerra pricing: published all-in project ranges, September 2026. Corrections: sales@olerra.com.
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