Keep driving southeast past Rita Ranch and the rooftops don't stop — they climb into the foothills of the Santa Rita Mountains and land in Corona de Tucson, an unincorporated pocket of Pima County that has spent the last decade turning open desert into subdivisions. It isn't a city with a downtown; it's a census-designated place of roughly 9,240 people at the 2020 count, sitting near 3,280 feet against the edge of the Coronado National Forest. But it is one of metro Tucson's steady growth stories — builders are still opening lots, and a 700-plus-acre master plan is entitled for well over a thousand more homes. Here is the July 17, 2026 High-Growth Area read on where Corona de Tucson is building, what is in the pipeline, and what the market around it looks like. 9,240 — Corona de Tucson's population at the 2020 census (U.S. Census Bureau). ~3,280 ft — Elevation in the Santa Rita foothills, against the Coronado National Forest. 716 acres — Diamond Ventures' Hook M Ranch — entitled for 1,376 homes plus 400 apartments. ~$391K — Median home sale price, up about 9% year over year (Redfin) Why the Southeast Edge Keeps Filling In Corona de Tucson's growth is the familiar Sonoran arithmetic: developable land, priced below the metro core, within reach of jobs. The community sits southeast of Tucson in the Santa Rita foothills, up against the Coronado National Forest, close to the employment base that anchors this side of the region — Tucson International Airport, Davis-Monthan Air Force Base, Raytheon/RTX, and the University of Arizona Tech Park are all a manageable commute up South Houghton Road. Homes here have historically sold under central-Tucson prices, which pulls buyers who want a new build without a central-Tucson number. Add elevation, mountain views, and open desert on the doorstep, and you get a place that keeps absorbing rooftops even as the raw land bank closer in shrinks. What's Building Now The active new-construction picture in Corona de Tucson is smaller and more concentrated than the master-plan sprawl up in Marana, but it is real. D.R. Horton's Sycamore Vista is the community most visibly going vertical right now — a single-story-focused neighborhood with roughly nineteen marketed floor plans and several homes carrying expected completions into September and the fall of 2026. Around it, the broader Corona de Tucson search area still lists dozens of new-construction homes across price points, a sign the pipeline here hasn't run dry even as the metro's overall pace has cooled. Sycamore Vista (D.R. Horton) (Single-story plans, ~19 floor plans, Completions Fall 2026): Per D.R. Horton and Homes.com, Sycamore Vista is the community most actively building in Corona de Tucson, a single-story-focused plan with several homes carrying expected completion dates in September and the fall of 2026. Hook M Ranch (Diamond Ventures) (716 acres, 1,376 homes + 400 apts, Long-horizon): Per the Arizona Daily Star, Diamond Ventures' 716-acre Hook M Ranch is entitled for 1,376 homes, 400 apartments, small commercial spaces, open space, and a public school. The Pima County Board of Supervisors approved a 25-year development agreement, though the county noted it will be several years before construction begins. Roads & Utilities (Andrada Road, Houghton Road, Wastewater): Per the development agreement, the Hook M Ranch developer must design and extend East Andrada Road from South Houghton Road to the project and improve the Houghton–Andrada intersection, plus build the wastewater pump stations and conveyance lines feeding the Corona de Tucson Wastewater Treatment Facility — the backbone that tends to shape where the next rooftops go. The Resale Pool (~$391K median, Up ~9% YoY, New + existing): Per Redfin, homes across Corona de Tucson sold at a trailing-twelve-month median in the low-to-mid $390,000s, up roughly 9 to 12 percent year over year depending on the reporting month, with current listings around a $389,000 median. What to Watch Next The near-term signal is Sycamore Vista finishing out through late 2026; the longer-term one is whether Hook M Ranch actually breaks ground. That single project would roughly double Corona de Tucson's housing base over time, and its required road and sewer work — extending Andrada Road, upsizing the Houghton intersection, expanding wastewater capacity — is exactly the kind of infrastructure that tends to pull additional builders in behind it. Corona de Tucson won't out-permit Marana or Vail this year, but for a buyer priced out of central Tucson and willing to trade a longer commute for a newer house, it remains one of the metro's quieter release valves. Quick reference (July 17, 2026): Corona de Tucson is an unincorporated Pima County community in the Santa Rita foothills southeast of Tucson, with a 2020 census population of 9,240 and an elevation near 3,280 feet (ZIP 85641). D.R. Horton's Sycamore Vista is the community actively building, with single-story floor plans and completions into the fall of 2026. Diamond Ventures' 716-acre Hook M Ranch is entitled for 1,376 homes plus 400 apartments, small commercial, open space, and a public school under a 25-year county development agreement, but is years from construction. Per Redfin, the area's median sale price runs in the low-to-mid $390,000s, up roughly 9–12% year over year. Prices, plans, and timelines change — confirm current details with each builder or the county before relying on any single figure. The Market Around It New homes usually price above an area's resale median, so the surrounding market is the fair backdrop. Per Redfin, Corona de Tucson's median sale price sat in the low-to-mid $390,000s over the trailing year, up roughly 9 to 12 percent from the prior twelve months — one of the firmer appreciation readings in a metro that has otherwise cooled, with current for-sale listings around a $389,000 median. Zoom out and Redfin put the citywide Tucson median near $320,000 in recent readings. Treat both as area and metro context, not a forecast or investment advice for any single home; new construction usually carries a premium over those resale figures. Sources U.S. Census Bureau — QuickFacts: Corona de Tucson CDP, Arizona — census.gov/quickfacts/coronadetucsoncdparizona — accessed July 17, 2026 — for the 2020 census population of 9,240 and Corona de Tucson's status as an unincorporated census-designated place in Pima County. Wikipedia — "Corona de Tucson, Arizona" — en.wikipedia.org/wiki/Corona_de_Tucson,_Arizona — accessed July 17, 2026 — for the community's location in the foothills of the Santa Rita Mountains adjacent to the Coronado National Forest, its elevation near 3,280 feet, and ZIP code 85641. Arizona Daily Star (Tucson.com) — "Major housing project near Corona de Tucson advances" — tucson.com/business/major-housing-project-near-corona-de-tucson-advances — accessed July 17, 2026 — for Diamond Ventures' 716-acre Hook M Ranch entitled for 1,376 homes, 400 apartments, small commercial spaces, open space, and a public school; the Pima County Board of Supervisors' approval of a 25-year development agreement; the requirement to design and extend East Andrada Road from South Houghton Road and improve the Houghton–Andrada intersection; the wastewater pump stations and conveyance lines to the Corona de Tucson Wastewater Treatment Facility; and the note that it will be several years before construction begins. Commercial Property Executive (CommercialSearch) — "County Approves 716-Acre Multifamily Development Near Corona de Tucson" — commercialsearch.com/news/county-approves-716-acre-multifamily-development-near-corona-de-tucson-county — accessed July 17, 2026 — corroborating the Hook M Ranch acreage, home and apartment counts, and the county development-agreement approval. D.R. Horton / Homes.com — "New Homes in Corona de Tucson, AZ" (Sycamore Vista) — homes.com/corona-de-tucson-az/new-construction — accessed July 17, 2026 — for D.R. Horton's Sycamore Vista as the community actively building, its single-story floor plans, and homes with expected completions in September and the fall of 2026. NewHomeSource — "New Construction Homes in Corona de Tucson, AZ" — newhomesource.com/communities/az/tucson-area/corona-de-tucson — accessed July 17, 2026 — for the active new-construction inventory in the Corona de Tucson search area and the roughly nineteen marketed floor plans at Sycamore Vista. Redfin — "Corona de Tucson, AZ Housing Market" — redfin.com/city/22116/AZ/Corona-de-Tucson/housing-market — accessed July 17, 2026 — for the trailing-twelve-month median sale price in the low-to-mid $390,000s, the roughly 9 to 12 percent year-over-year change, and the roughly $389,000 median list price. Redfin — "Tucson Housing Market" — redfin.com/city/19459/AZ/Tucson/housing-market — accessed July 17, 2026 — for the citywide Tucson median sale price near $320,000 in recent readings. All data current as of July 17, 2026; prices, plans, and builder and infrastructure timelines change, so confirm details directly with each builder or Pima County before relying on any single figure. This post is for informational purposes only and is not an offer to sell or a solicitation of an offer to purchase real estate.