NEIGHBORHOOD
Sunnyside
East Flagstaff along Fourth Street, inside city limits. MLS data as of September 2026
Home›Flagstaff Neighborhoods›Sunnyside
Sunnyside is one of Flagstaff's older east-side neighborhoods, first platted in 1925 along what became Route 66, with modest single-family homes on city lots, a nonprofit neighborhood association, and quick access to Fourth Street.
Highlights
Sunnyside, at a glance
City or county
Inside City of Flagstaff limits; City of Flagstaff Fire Department
Typical lot size
About 6,250 sq ft (0.14 acre), median of homes sold
Water and sewer
Inside city limits, where City of Flagstaff water and sewer is standard
HOA
None on recent single-family sales; the Sunnyside Neighborhood Association is a voluntary nonprofit, not an HOA
Wildfire setting
Pines and yards in the city grid; Spruce Wash, a Rio de Flag tributary, runs through the area
Build-out
Largely built out; homes sold were built 1915 to 1991
Snow and plowing
Street status and plowing not published
Homes sold, last 12 months
11, all single-family
Short-term rentals: city license
City of Flagstaff rules; no HOA layer for most homes
Sunnyside is inside city limits, so the City of Flagstaff's short-term rental license applies: $250 a year, an Arizona TPT license, notice to adjacent, across-the-street, and diagonal neighbors with a 24-hour emergency contact, $500,000 in liability insurance, a sex-offender registry check before each stay, required equipment, and hotel-rate sales and BBB taxes. ADUs that received a Certificate of Occupancy after September 14, 2024 require the owner to live on the property. Single-family homes here generally have no HOA, so the City's rules are usually the whole picture. Townhome and condo complexes in the area, such as Arroyo Seco Townhomes and Pine View Village, have their own associations.
Getting around
Fourth Street to Route 66, Cedar Avenue, and I-40
From East Street, Safeway on Cedar Avenue is about 4 minutes away; Bashas' on Humphreys Street and Walmart on Huntington Drive about 6; Whole Foods and Sam's Club about 7; Natural Grocers about 8; Sprouts and Target about 10. Flagstaff Medical Center is about 2.2 miles, downtown about 3.1, NAU about 3.5, and Pulliam Airport about 8.4.
Sunnyside was first platted in 1925 by Alf Dickinson and Son on a 160-acre former ranch along the National Old Trails highway, later Route 66, then about a mile and a quarter east of the city limits. It grew largely outside city zoning until the City annexed it in 1959, according to a local brokerage, which is part of why its homes and land uses vary from block to block. Main streets include Fourth Street, Main Street, West Street, and East Street.
Sunnyside rewards buyers who look closely. The homes and lots vary a lot from street to street, so we walk the block, look at the drainage, and look at what has been updated before we talk price.
Over the last twelve months the MLS shows 11 closings, all single-family, between $294,500 and $530,000, with a median of $390,000 and the middle half between about $339,000 and $433,000. The typical home was about 1,120 square feet, built around 1956, on about 6,250 square feet. Median days on market was 59, and none of the sales listed an HOA fee.
After the 2019 Museum Fire damaged the Spruce Wash watershed above town, 2021 monsoon storms caused substantial flooding in Sunnyside along the wash. The City built nine Spruce Wash flood mitigation projects, including detention basins, channel work, and culverts, and reported them complete in summer 2026. Ponderosa Park on First Street has pickleball, tennis, volleyball, and basketball courts, and the Flagstaff Aquaplex is on Fourth Street.
Questions buyers ask us most about Sunnyside
Is Sunnyside in a flood zone?
Parts of Sunnyside along Spruce Wash flooded in 2021 after the Museum Fire, and the City completed nine flood mitigation projects in summer 2026. Flood zones are mapped address by address, so the designation for the specific lot matters.
Does Sunnyside have an HOA?
How old are the homes in Sunnyside?
What do homes in Sunnyside cost?
Terrain & Access
The neighborhood, mapped
Sunnyside sits along Fourth Street on Flagstaff's east side, north of Route 66. Spruce Wash runs through the neighborhood toward the Rio de Flag.
In the Area
What's changing around Sunnyside
Spruce Wash flood projects completed
The City of Flagstaff reports it has completed the Spruce Wash Flood Mitigation suite of nine projects, built 2021 to 2026 to reduce post-Museum Fire flooding in the Sunnyside, Paradise, and Grandview neighborhoods.
connect.flagstaffaz.govStormwater diversion at the Killip basins
In December 2024 FEMA published a final public notice for a City project adding an outlet structure and 42-inch pipe at the Killip Regional Detention Basins to divert stormwater from the Spruce Wash drain to the West Wash storm drain.
flagstaff.az.govRoundabout at Fourth Street and Lockett Road
The City replaced the signal at Fourth Street and Cedar Avenue/Lockett Road with a $6.9 million roundabout. Work began March 31, 2025, and the intersection reopened August 4, 2025.
connect.flagstaffaz.govNeighborhood
Areas within Sunnyside
Sunnyside (1925 plat)
The original subdivision, platted along the National Old Trails highway with lots of 50 by 142 feet.
Sunnyside North Annex
The subdivision name on most recent single-family sales, on streets such as West Street and Main Street.
Sunnyside Farms
A subdivision name that appears on several recent single-family sales.
Arroyo Seco Townhomes and Pine View Village
Townhome and condominium associations managed by Peaks HOA Management.
Recent Sales in Sunnyside

Listing Provided By Realty One Group, Mountain Desert

Listing Provided By John F. Wilson
Currently Available in Sunnyside
Request Off-Market Access
Love Sunnyside? Let's find your dream home!
What makes this neighborhood unique
Sunnyside is one of the more attainable single-family neighborhoods inside Flagstaff city limits, close to Fourth Street, parks, and the Aquaplex, with no HOA on recent sales. The plan focuses on the individual lot: drainage and flood history, the home's condition, and the mix of land uses on the block.
Compare
Compare with similar neighborhoods
Neighborhood
Lower Greenlaw
Lower Greenlaw is mid-century homes around Bushmaster Park. Choose Lower Greenlaw for the park next door; Sunnyside for a lower price.
Neighborhood
Upper Greenlaw
Upper Greenlaw is 1960s ranch homes north of Lockett Road. Choose Upper Greenlaw for somewhat larger homes and lots; Sunnyside for a lower price.
Neighborhood
Downtown Flagstaff
Downtown is historic homes and condos in the city center. Choose downtown to walk to everything; Sunnyside for a much lower price.
Neighborhood
Switzer Mesa
Switzer Mesa is homes, townhomes, and condos east of downtown. Choose Switzer Mesa for newer construction; Sunnyside for a lower price and no HOA.
Ready to look closer at Sunnyside?
A private consultation: comps that reflect each home's condition, a flood zone and drainage review for the specific lot, and the City rental rules if income is part of your plan.
Request a Neighborhood Briefing