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Pueblo, CO Accessory Structures: ADU Rules (2026)

Some Restrictions

Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

ADU rules in Pueblo, CO, also called accessory dwelling unit regulations or granny flat ordinances, cover setbacks, owner-occupancy, parking, and permit requirements.

Key Facts

Allowed: One ADU per one-family lot
Size cap: 800 sq ft or 100% of home
Detached setback: 5 feet if 16 ft or lower
Citation: Pueblo Municipal Code § 17-4-16

ADU Eligibility Quick-Check

An Accessory Dwelling Unit (ADU) is a smaller, independent living unit on the same lot as a single-family home: converted garages, detached cottages, basement or attic conversions, and attached additions all qualify. Most states have streamlined ADU permitting since 2020, but local rules still control size, height, and setback.

Is your lot zoned single-family or multi-family residential?
Does your lot have at least 1,200 sq ft of buildable space?
Is your existing home owner-occupied (in most states this is not required, but some require it for ADU permits)?
Will the ADU stay under your state's size cap (commonly 850-1,200 sq ft for detached)?
Can you provide one off-street parking space (waived in many states within 0.5 mi of transit)?

If you answered 'yes' to most of these, you likely qualify in Colorado under recent ADU streamlining laws. The Pueblo, CO rules below cover local size, height, and setback requirements.

Summary

Pueblo allows one accessory dwelling unit by right on any lot zoned for a one-family residence, including qualifying PUDs, but caps its size at 800 square feet or the size of the main home, whichever is smaller.

One accessory dwelling unit is allowed as an accessory use to a one-family residence in any zone district where a one-family residence is allowed, including in any Planned Unit Development (PUD) Districts that allow one-family residences. A one-family residence includes a detached single-family dwelling unit and a manufactured home placed on a permanent foundation designed by a Colorado registered design professional, but excludes a two-family residence, townhouse, multi-family residence, mobile home, or recreational vehicle.
(b) The following standards apply to all accessory dwelling units.
(1) The 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.
(2) The accessory dwelling unit shall not be sold separately from the one-family residence on the same lot; nor shall the lot on which the accessory dwelling unit and one-family residence are situated be further subdivided or rearranged to create individual lots

View official code

Official source re-checked September 7, 2026: no newer edition of the code had been published (publisher’s edition: Code of Ordinances: Supplement 109).

Full Breakdown

Section 17-4-16(a) permits one accessory dwelling unit as an accessory use anywhere a one-family residence is allowed, including Planned Unit Development districts that permit one-family homes; it excludes two-family, townhouse, multi-family, mobile home, and RV lots. Subsection (b) caps the ADU at no more than 800 square feet or 100% of the primary home's gross floor area, whichever is less, limits a lot to one ADU, and sets height and setback rules: attached units follow the zone district's standard height and rear-yard setback, while detached units 16 feet or lower may sit as close as 5 feet from the rear line.

Violations & Fines

Building or converting an ADU that exceeds the size cap, adds a second unit, or skips required zoning review violates Chapter 4 performance standards, a municipal offense under Section 17-7-3.

Frequently Asked Questions

Can I build an ADU on any residential lot in Pueblo?

Only where a one-family residence is allowed, including qualifying PUDs. Two-family, townhouse, multi-family, and mobile home lots don't qualify under Section 17-4-16(a).

How big can a Pueblo ADU be?

No larger than 800 square feet or 100% of the primary home's gross floor area, whichever is smaller, per Section 17-4-16(b)(7).

Sources & Official References

[1]Pueblo Municipal Code § 17-4-16 — Accessory Dwelling Unit Development Performance Standards (Municode)

Other rules in Pueblo

Noise Ordinances: Construction HoursSome Restrictions Fence Regulations: Height LimitsSome Restrictions Shed & Carport RulesSome Restrictions ADU Owner OccupancySome Restrictions Noise Ordinances: Vehicle NoiseSome Restrictions Noise Ordinances: Decibel LimitsSome Restrictions Parking Rules: Driveway RulesSome Restrictions Parking Rules: Loading ZonesSome Restrictions

All Pueblo rules

How Pueblo compares: Easiest Cities to Build an ADU·Compare Pueblo to another location·View the Colorado accessory structures overview

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