At a Gilbert council meeting in 2024, Councilman Chuck Bongiovanni posed a hypothetical to town planning staff. If he owned ten properties in the Heritage District, he asked, "can I knock down my old homes and put up a bunch of quadplexes and a couple of ADUs thrown in?"
It's the same question a lot of East Valley investors have been asking themselves since Arizona's new middle-housing law took effect on January 1, 2026. The short answer is yes, in some places, under some conditions. The longer answer is the one that actually matters if you're pricing a deal, and it starts with understanding that Gilbert didn't legalize duplexes and fourplexes everywhere. It built a narrow, specific corridor around its own downtown, and that decision shapes where the real opportunity sits today.
The law that forced Gilbert's hand
House Bill 2721, signed by Governor Katie Hobbs in 2024, requires any Arizona municipality with a population of 75,000 or more to allow duplexes, triplexes, fourplexes and townhomes as a permitted use, meaning no public hearing, no variance, no conditional use approval, on single-family zoned lots in two specific situations: within one mile of the town's central business district, or on at least 20% of any new subdivision built on 10 or more contiguous acres. The full statutory language is available directly from the Arizona Legislature.
The law carried a deadline with teeth. If a city hadn't adopted a compliant ordinance by January 1, 2026, middle housing would automatically be allowed on every single-family lot in that city, without the one-mile or 20% limitations at all. That single provision explains almost everything Gilbert did next.
Why the Heritage District became the boundary
Gilbert didn't have an official downtown business district before this law. It had the Heritage District, the town's historic commercial and civic core, but no formally designated "central business district" in the zoning sense the state law required. Town staff, including Intergovernmental Relations Director Rob Bohr and Principal Planner Ashlee MacDonald, moved to formally define one specifically around the Heritage District boundary, a decision reported by the Gilbert Sun News as the town's way of containing the law's reach rather than letting it apply to every single-family lot in Gilbert.
That containment came with a real cost. By creating the district, Gilbert also gave up its ability to offer Government Property Lease Excise Tax incentives inside that boundary, a tool it has historically been reluctant to use anyway. For investors, the practical upshot is that land inside the new district carries the middle-housing entitlement, but not the tax sweetener that sometimes accompanies denser redevelopment elsewhere in the Valley.
The Gilbert Independent reported that the council was scheduled to take up final adoption of this land development code update at its November 18, 2025 meeting, just weeks ahead of the state deadline.
What's actually left inside the line
Here's the number that should change how an investor thinks about this. When staff presented the proposed district boundary, they told council it contained 8,845 total lots, of which only 55 were undeveloped. That means the by-right duplex and fourplex entitlement inside the Heritage District isn't opening up vacant land. It's opening up teardown economics on lots that already have a house on them.
That distinction matters more than the headline. A buyer who assumes "middle housing is now legal near downtown Gilbert" and starts shopping for empty parcels is going to come up nearly empty. The realistic play inside this boundary is acquiring an existing single-family home, demolishing it, and building new, which means acquisition price is only one line item. Demolition, utility relocation and site prep for a fourplex footprint change the math in ways that a simple per-door price comparison won't capture. This is exactly the kind of scope that benefits from a contractor's eye before an offer goes in, not after.
The other door: a 20% set-aside, not a rezone
The one-mile district isn't the only path the law creates. The second provision requires that at least 20% of any new subdivision built on 10 or more contiguous acres of single-family zoned land include middle housing. Town staff identified roughly 60 such parcels across Gilbert that could qualify, describing them as mostly small slivers of land around already-developed areas, along with a few larger tracts, including parcels off Val Vista Drive and a sizable chunk of land along Power Road.
This is a fundamentally different investor profile than the Heritage District teardown play. A 10-acre-plus parcel isn't something a small landlord-operator picks up to add a fourplex to a rental portfolio. It's a builder-scale or joint-venture proposition, where the middle-housing units are a mandated slice of a much larger new subdivision rather than a standalone acquisition. Confusing the two pathways, buying a single infill lot and expecting the 20% set-aside logic to apply, or vice versa, is an easy mistake to make. It's worth pointing out that even Gilbert's own council wasn't immune to this: when MacDonald responded to Bongiovanni's quadplex question, her answer tied the scenario to the 10-contiguous-acre threshold rather than the separate one-mile provision his question actually described, an exchange that shows how easily the two rules blur together even for people who wrote the ordinance.
| Inside the 1-mile Heritage District line | On a new 10+ acre subdivision | |
|---|---|---|
| Entitlement | Duplex, triplex, fourplex, townhome permitted by right on existing single-family lots | At least 20% of new subdivision lots must allow middle housing |
| Available inventory | 55 vacant lots out of 8,845 total (as reported when the boundary was set) | Roughly 60 qualifying parcels town-wide, including tracts near Val Vista Drive and Power Road |
| Typical play | Buy an existing home, demolish, rebuild | Partner into or acquire raw land for a new subdivision |
| Tax incentive | GPLET no longer available inside the district | Standard for new subdivision development elsewhere in town |
| Buyer profile | Small investor or landlord-operator | Builder or larger-scale developer |
The district is also getting taller and denser around you
Whatever you decide to do with the middle-housing entitlement itself, it's worth knowing what's happening around it. In December 2025, Gilbert's council approved raising the maximum building height in the Heritage District from 55 feet, or four stories, to 75 feet, with a path to 90 feet for projects that include public benefits like parking, public art or sustainability features, according to the Gilbert Independent. At the same time, Heritage Park, a 10-acre mixed-use project at Gilbert Road and Juniper Avenue developed by Creation in partnership with Crescent Communities, broke ground in May 2025 and includes a 288-unit luxury apartment community called NOVEL Heritage Park, expected to open in spring 2027, alongside roughly 47,000 square feet of retail and restaurant space, according to Gilbert's own economic development office.
Put those two facts together with the middle-housing entitlement and the picture sharpens. The one place in town where a small investor can add density by right is also the place the town just agreed to let get taller and where a nine-figure mixed-use project is already under construction. That's not a coincidence an investor should ignore. It's a signal that land values inside that one-mile ring are being repriced by more than just the new zoning rule.
Before you buy inside the line
A few questions worth running through before making an offer on anything inside the Heritage District boundary:
- Is the lot's existing structure worth renovating, or does the deal only work as a teardown? Get a real demolition and site prep number, not an estimate.
- Does the parcel actually sit inside the town's designated Central Business District boundary, or just near the general Heritage District area? The two aren't automatically the same thing, and the entitlement only applies inside the formal boundary Gilbert adopted.
- Have you confirmed whether GPLET or any other incentive you were counting on is even available at this address, given that the district's creation removed that tool inside its boundary?
- If you're looking at a larger parcel instead, does it actually meet the 10-contiguous-acre threshold, and is the 20% set-aside requirement reflected in how you're underwriting unit count and pricing?
None of this is legal or tax advice, and zoning boundaries and ordinance language can shift as the town continues to implement the law, so any of these details should be confirmed directly with Gilbert's planning department before you write an offer.
FAQ
Does the one-mile boundary apply to my specific Gilbert address? Only if your lot falls inside the formally adopted Central Business District boundary that Gilbert built around the Heritage District. Being in the general Heritage District area isn't the same as being inside the mapped boundary, so this needs to be confirmed parcel by parcel with the town.
If I own a home outside that boundary, does anything change for me right now? Not under the one-mile provision. Your lot could still be affected by the separate 20% set-aside rule, but only if it's part of a new subdivision proposal on 10 or more contiguous acres, which is a different situation than an individual homeowner deciding to add a unit.
Is this the same thing as an ADU? No. Accessory dwelling units are governed by a separate state law and generally must stay on the same lot as an existing primary home. Middle housing under this law refers to standalone duplexes, triplexes, fourplexes and townhomes as permitted uses on qualifying lots.
If you're weighing a Heritage District teardown against a 10-acre play near Val Vista Drive or Power Road, or you just want a second set of eyes on what a lot is actually worth once demolition and rebuild costs are on the table, Jesse Lowery has the contracting background to scope it accurately and the transaction experience to help you move on it. Get List Price.
