Yarnell sits south of Prescott on SR-89, between Prescott and Wickenburg, in Yarnell Hill in the Weaver Mountains, where SR-89 drops 1,300 feet in four miles at 4,780 ft. At 4,780 feet Yarnell is in the county's 18 inch frost band. The material question here is not snow, though. After a fire that destroyed half the town in 2013, ignition-resistant exterior construction is a live subject in this community in a way it is nowhere else on this list.
Open ranch countryGold, around 1865. The town is named for Harrison Yarnell, who located the Yarnell mine in 1873. On 30 June 2013 the Yarnell Hill Fire destroyed half the town and killed 19 firefighters of the Granite Mountain Hotshots; the memorial state park three miles south on SR-89 was dedicated in 2016. The Shrine of St Joseph of the Mountains is the other landmark.
No station climate normals are published for Yarnell itself, so this page does not quote any. The design figures below come from the adopted code rather than from local weather records.
This is an unincorporated address, so Yavapai County Development Services issues the building permit. The office is at 1120 Commerce Drive, Prescott AZ 86305, on 928-771-3214. That also means the county's exemptions apply here: a detached non-habitable accessory structure up to 400 square feet and 12 feet needs no building permit, and nor does an uncovered deck up to 200 square feet that is under 30 inches, detached and not serving a required exit.
Whichever authority applies, an Arizona ROC licence is a separate question from the permit. It can be checked free on the ROC website, and it is worth doing before any money changes hands.
| Structure | Installed range | Unit | Typical |
|---|---|---|---|
| Concrete patio | $12 - $26 | per sq ft | $18 |
| Pergola | $28 - $65 | per sq ft | $44 |
| Attached patio cover | $30 - $55 | per sq ft | $42 |
| Ramada or free-standing shade structure | $45 - $95 | per sq ft | $68 |
| Deck | $38 - $80 | per sq ft | $57 |
| Patio enclosure or sunroom | $70 - $140 | per sq ft | $104 |
Planning ranges for the Prescott and Yavapai County market, not quotes. They cover the structure as installed and exclude the permit, which is set by whichever authority has jurisdiction and is not published as a figure on this site.
This is an unincorporated address, so Yavapai County Development Services issues the building permit. The office is at 1120 Commerce Drive, Prescott AZ 86305, on 928-771-3214. That also means the county's exemptions apply here: a detached non-habitable accessory structure up to 400 square feet and 12 feet needs no building permit, and nor does an uncovered deck up to 200 square feet that is under 30 inches, detached and not serving a required exit.
At 4,780 ft this falls in the county's 18 inches frost band, with weathering classed as moderate. Those steps come from Yavapai County Ordinance 2025-4, adopted 1 October 2025.
Unincorporated Yavapai County publishes a ground snow load of 20 to 70 psf rather than a single figure, so a site-specific value is needed. Ask whoever quotes you which number they used.
The same planning ranges apply across the county: roughly $30 to $55 per square foot for an attached patio cover, $45 to $95 for a ramada, $28 to $65 for a pergola and $12 to $26 for a concrete patio. Distance from Prescott and site access move the labour component.
Where an association exists, assume yes and go to it before the building department. Architectural review is usually the slower gate and it is the one that can require the design to change.
The permit path changes across Yavapai County more than the work does. Check the one that matches your address.