Residential Building Code – 2018 IRC and Appendix Q

Routt (County), Colorado


Name Residential Building Code – 2018 IRC and Appendix Q
Municipality Routt (County)
Zoning Districts Residential
Effective Date 01/01/2021
Municipal Code Building Standards Code
Code Link
Authority Routt County Regional Building Department


Tiny House can be constructed on site as a permanent dwelling unit in accordance with the current adopted Building Codes. Routt County Regional Building Department (RCBD) reviews permit applications in accordance with the 2018 International Residential Building Code and the recently adopted Appendix Q from the 2018 IRC to allow additional design options for tiny homes.  (Resolution No. 2020 – Page 7:   (PLEASE NOTE:  Since this is a recent change, some documentation will still mention IRC 2015.)

Need More Info?

Tiny Home Construction Informational Brochure:

Other Building Code Handouts:

Key Contacts

Routt County Regional Building Department (Building Permits)
136 6th Street, Ste 201
Steamboat Springs, CO 80487
(970) 870-5566

Routt County Planning Department (Valid & Legal Access)
(970) 879-2704

Routt County Environmental Health (Wastewater: black & grey)
(970) 870-5588

Division of Water Resources (Water Provisions)
(970) 879-0272



Updated:  February 2021 – Loran

THIA will be constantly updating the legislation data. Check back often. Suggest A Correction if you are aware of any missing or incorrect information. AND keep scrolling to learn more about getting guidance.



Building Code — Legislation that speaks to how to construct a tiny house.

Zoning Code — Legislation that speaks to how the lot will be used.


ADU — Accessory Dwelling Unit

DMV — Division of Motor Vehicles

IB — Industrialized Buildings

IRC — International Residential Code

PUD — Planned Unit Development

RV — Recreational Vehicle

SF — Single Family Dwelling

T — Transitional Housing

UDO — Unified Development Ordinance

Please Suggest a Correction if you find broken links or misinformation.

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