Take Interstate 10 north out of Tucson, exit Tangerine Road, and look east of the freeway between the Union Pacific tracks and the Tortolita foothills: that's Mandarina. Per the Town of Marana's planning documents, Real Estate Daily News' coverage of the master plan's expansion, AZBEX's reporting on the Mandarina South plan, KB Home's community pages, Meritage Homes' Mandarina Signature and Premier series pages, and Rose Law Group Reporter's coverage of Lennar's entry, Bela Flor Communities' Mandarina master plan now totals 455 acres and is entitled by the Town of Marana for up to 2,500 residential units. Three national builders are simultaneously vertical inside the footprint as of May 14, 2026: Meritage Homes, KB Home, and Lennar. A separate 1,500-unit Mandarina South master plan is advancing on adjacent acreage to the south. Here is a fully sourced May 14, 2026 walk-through for relocation buyers, Tucson and Oro Valley move-up shoppers, and anyone tracking where the northwest metro is actually growing. 455 acres — Total Mandarina master-plan footprint. 2,500 units — Town of Marana entitlement for the master plan. 3 builders — Meritage, KB Home, and Lennar building inside Mandarina. +1,500 — Additional units planned at Mandarina South Where Mandarina Actually Is Per Homes.com's Mandarina neighborhood guide, the Town of Marana's project documentation, and the Tortolita Alliance's 'Mandarina on Tangerina' write-up, Mandarina sits at the intersection of Tangerine Road, Interstate 10, and the Union Pacific Railroad corridor in unincorporated-turned-annexed northwest Marana, Arizona. The location places the community roughly 30 minutes northwest of downtown Tucson on a typical drive, a short hop from the Tucson Premium Outlets at the Marana Center, and immediately east of the I-10 / Tangerine interchange that anchors the northwest metro's freight, retail, and commuter pattern. To the east of Mandarina lies Dove Mountain and the Tortolita Mountain foothills; to the south sits the existing Gladden Farms master-planned community and the Town of Marana's municipal complex; to the north, the Pinal County line and the open desert that grades toward Red Rock. The Tangerine Road corridor itself was widened from a two-lane rural road to a four-lane arterial through the early 2020s and has been the Town of Marana's primary east-west spine for new-construction permitting through 2026. How the 342-Acre Plan Became a 455-Acre Plan Per Real Estate Daily News' reporting on Bela Flor Communities' acquisition activity and AZBEX's 'Master Plan Grows in Marana' coverage, Mandarina began life as a 342-acre rezoning approved by the Town of Marana for a mixed-use master plan at the Tangerine / I-10 / Union Pacific Railroad corridor. Bela Flor Communities subsequently added a $4.25 million, 113-acre acquisition that pushed the total footprint to 455 acres. The current entitlement supports a residential mix of detached single-family homes, attached single-family product (paired homes and rear-loaded townhomes), and multifamily, with a combined cap of 2,500 units across the master plan; the entitlement also reserves land for retail, hospitality, and other commercial uses along the Tangerine frontage. Mandarina South — a separate but adjacent master plan — is advancing through Marana's review process for up to 1,500 additional residential units, including a mix of traditional multifamily, build-to-rent product, and single-family detached. The Builders Inside the Footprint Meritage Homes — Signature & Premier Series (266 lots, Detached SFR, Energy-efficient construction): Per Real Estate Daily News' coverage of Meritage's Mandarina acquisition and Meritage's own Mandarina Signature Series and Mandarina Premier Series community pages, Meritage Homes purchased 266 platted lots inside Mandarina across two product lines: a Signature Series of detached single-family homes on a smaller-footprint lot, and a Premier Series of larger detached plans. Meritage markets the homes as 100% energy-efficient construction with spray-foam insulation and ENERGY STAR-certified equipment. KB Home — Mandarina Reserve & Mandarina Horizon (182 lots, Two communities, Personalization-driven): Per KB Home's Mandarina Reserve community page, Zillow's Mandarina Horizon community listing, and Real Estate Daily News' 'KB Home Finalizing 182 Platted Lots at Mandarina in Marana' coverage, KB Home is building two communities inside the master plan — Mandarina Reserve and Mandarina Horizon — together comprising 182 homesites across 35.26 acres in Phase 1. KB Home's national playbook emphasizes buyer-led personalization at its KB Home Design Studio. Lennar — Joining Meritage at Mandarina (160 lots, Multi-product builder, Everything's Included): Per Real Estate Daily News' 'Lennar Homes Joining Meritage at Mandarina MPC in Marana' coverage and Rose Law Group Reporter's reporting, Lennar acquired 160 platted and engineered lots inside Mandarina to deliver its detached single-family lineup. Lennar's national 'Everything's Included' platform packages a defined feature list — stainless appliances, smart-home tech, and similar — into the base price rather than as optional upgrades. Mandarina South — Future Phase (+1,500 units, Multifamily / BTR / SFR, In review): Per AZBEX's 'Mandarina South Master Plan Advances in Marana,' the Mandarina South master plan is moving through Town of Marana entitlement for up to 1,500 additional residential units on land directly adjacent to the existing Mandarina footprint. The plan contemplates a mix of traditional multifamily, build-to-rent communities, and single-family detached homes, expanding the corridor's projected build-out beyond the original 2,500-unit cap. Why the three-builder lineup matters for buyers: Meritage, KB Home, and Lennar each market to slightly different segments — Meritage on energy efficiency, KB Home on Design Studio personalization, and Lennar on Everything's Included packaging. Inside a single 455-acre master plan, that means a typical Mandarina shopper can compare three meaningfully different new-construction philosophies on essentially the same dirt, school assignment, HOA, and amenity package — which is unusual in the Tucson metro and worth using as a deliberate price-and-feature comparison. Amenities Inside the Master Plan Per Mandarina's published community marketing — surfaced through Meritage Homes' Mandarina pages, Family Development Homes' 'Arise Mandarina' cottage-neighborhood listing, Homes.com's Mandarina neighborhood guide, and the Tortolita Alliance's master-plan summary — the master plan reserves land for a resort-style pool and spa, a fitness center, central park, two dog parks, multiple pocket parks, pickleball courts, playgrounds, ramada / BBQ space, and a network of walking trails connecting product types across the footprint. The trail-and-park layout is designed to function as the connective tissue between Meritage's, KB Home's, and Lennar's individual phases — a deliberate departure from the typical Marana pattern in which each builder operates its own separated subdivision with its own park stub and its own HOA. Commercial land along the Tangerine Road frontage is held back for future retail, hospitality, and limited service uses, consistent with the Town of Marana's adopted Tangerine Corridor planning. Schools and Public Services Per Marana Unified School District 6's published district map and Pima County's parcel GIS overlay, Mandarina sits inside Marana Unified School District 6, the K-12 district that also serves Dove Mountain, Gladden Farms, Continental Ranch, and the broader Tangerine corridor through 2026. The closest elementary, middle, and high school assignments are subject to Marana USD's standard boundary review and may be updated as Mandarina's residential count grows; prospective buyers should verify current assignments directly with the district or with the Town of Marana before contract. Public-safety coverage falls to the Town of Marana for police, the Northwest Fire District for fire and emergency response, and Pima County and the Town of Marana jointly for transportation infrastructure. Per Real Estate Daily News and the Town of Marana, water service inside Mandarina is provided by the Town of Marana Water Department; wastewater is handled through Marana's wastewater system. How Mandarina Compares to the Rest of the Northwest Metro Per the Town of Marana's planning materials and aggregated builder data for the adjacent master plans, Mandarina is one of four large active master plans defining the northwest Tucson new-construction map in 2026. To the east, Dove Mountain is the established Cottonwood Properties master plan around The Ritz-Carlton, Dove Mountain golf, and the Tortolita Mountain foothills; to the south of Mandarina, Gladden Farms is a built-out Crown West Realty master plan north of Marana Town Center; northwest of Gladden Farms, Saguaro Bloom is an active multi-builder community along the Twin Peaks corridor; and along the Continental Ranch corridor west of I-10, Lazy K Bar Ranch, Continental Ranch, and Sunflower continue to absorb resale and limited new-construction demand. Mandarina's positioning — a single 455-acre footprint, three national builders building simultaneously, an entitlement that allows multifamily alongside detached single-family, and a direct I-10 / Tangerine interchange — sets it apart from Dove Mountain's foothills-luxury orientation and from Gladden Farms' fully-built-out detached-only profile. Quick comparison for a relocation shopper: Dove Mountain is the foothills-luxury, golf-and-Ritz-Carlton anchor; Gladden Farms is the established detached-only family neighborhood with built-out parks and schools; Saguaro Bloom is the active multi-builder Twin Peaks corridor; and Mandarina is the I-10-frontage master plan with three builders, a planned multifamily component, and the longest forward-build-out horizon. Each of the four is inside Marana Unified School District 6 and inside the Town of Marana's municipal limits. Pricing and the Broader Marana Market Per publicly aggregated MLS data on Redfin's Marana market dashboard, Zillow's Mandarina neighborhood page, and Realtor.com's Marana new-construction search, Marana's new-construction inventory as of spring 2026 generally enters the market in the high $300,000s for the smallest paired-home and townhome floor plans, the mid-$400,000s to mid-$500,000s for typical detached three- and four-bedroom plans, and into the $600,000s and above for the larger Premier-tier and view-lot plans across master plans like Dove Mountain. Mandarina's specific pricing varies by builder, series, and lot premium — Meritage publishes from-pricing on its Mandarina Signature and Premier pages, KB Home publishes from-pricing on Mandarina Reserve and Mandarina Horizon, and Lennar publishes a separate from-price band — and prospective buyers should confirm directly with each builder for current incentives, lot premiums, and rate-buydown offers. Per Redfin's broader Tucson metro dashboard, the metro-wide March 2026 median sale price sat near $365,000; northwest-metro and Marana submarkets generally trend at or slightly above that line because of the heavier new-construction mix. Why Mandarina Matters for the Northwest Metro For relocation buyers evaluating Tucson against Phoenix, Las Vegas, Boise, and other Sun Belt destinations, the question is rarely whether a metro is growing on paper — it is whether the new growth is happening at a scale, a builder depth, and a location that will still feel coherent ten years out. Mandarina passes those tests in a way few other Tucson-area master plans currently do: a single 455-acre footprint, an entitlement that allows the mix of detached, attached, and multifamily product needed to absorb a real range of buyers, direct frontage on a four-lane Tangerine arterial and an I-10 interchange, and three national builders competing inside the same footprint with three distinct product philosophies. For local Tucson and Oro Valley move-up shoppers, the same factors translate into deeper inventory choice, faster build cycles, and the option to compare meaningfully different new-construction packages on the same school assignment and the same HOA. The northwest metro's growth story in 2026 is genuinely playing out along Tangerine Road — and Mandarina is the largest current piece of it. Quick reference (May 14, 2026): Mandarina master-planned community, Town of Marana, Arizona. 455 acres at Tangerine Road and the I-10 / Union Pacific Railroad corridor. Entitled for up to 2,500 residential units across detached single-family, attached single-family, and multifamily. Master-plan developer: Bela Flor Communities. Builders inside Phase 1: Meritage Homes (266 platted lots), KB Home (182 lots across Mandarina Reserve and Mandarina Horizon), and Lennar (160 lots). Adjacent Mandarina South master plan: up to 1,500 additional units. School district: Marana Unified School District 6. Water: Town of Marana. Fire / EMS: Northwest Fire District. Sources Town of Marana — adopted master plan documentation and Tangerine Corridor planning materials (maranaaz.gov). Bela Flor Communities — corporate master-plan summary for Mandarina. Real Estate Daily News — 'Meritage Homes has Rapid Expansion Planned in Northwest Tucson, at Mandarina and Naranja Trails,' 'Mandarina MPC Expands with the acquisition of 113 More Acres for $4.25 Million,' 'Lennar Homes Joining Meritage at Mandarina MPC in Marana,' and 'KB Home Finalizing 182 Platted Lots at Mandarina in Marana' (realestatedaily-news.com). AZBEX — 'Master Plan Grows in Marana' and 'Mandarina South Master Plan Advances in Marana' (azbex.com). Rose Law Group Reporter — 'Lennar joining Meritage at Mandarina MPC in Marana' (roselawgroupreporter.com). Meritage Homes — Mandarina Signature Series and Mandarina Premier Series community pages and Meritage Homes at Mandarina overview (meritagehomes.com/state/az/tucson). KB Home — Mandarina Reserve community page (kbhome.com/new-homes-tucson/mandarina-reserve) and Mandarina Horizon community listing on Zillow (zillow.com/community/mandarina-horizon). Family Development Homes — Arise Mandarina cottage-neighborhood listing (familydevelopmenthomes.com/for-lease/cottage-neighborhoods/marana-az). Tortolita Alliance — 'Mandarina on Tangerina' master-plan summary (tortolitaalliance.com). Homes.com — Mandarina neighborhood guide (homes.com/local-guide/marana-az/mandarina-neighborhood). Marana Unified School District 6 — district map and school-boundary information (maranausd.org/about/district-maps). Pima County GIS — parcel overlay tools (gis.pima.gov). Redfin — Marana market dashboard and Tucson metro dashboard reporting a March 2026 metro median sale price near $365,000 (redfin.com/city/11280/AZ/Marana and redfin.com/city/19459/AZ/Tucson). Zillow — Mandarina neighborhood and community pages (zillow.com). Realtor.com — Marana new-construction search and listings (realtor.com). Northwest Fire District and Town of Marana Water Department — published service-territory maps for the Tangerine corridor (northwestfire.org; maranaaz.gov/water). All data current as of May 14, 2026. This post is for informational purposes only and is not an offer to sell or a solicitation of an offer to purchase real estate.