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Written by: Renee Burke

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Growth limits and planning policies in Arizona are starting to act like guardrails: they don’t stop Phoenix from expanding, but they channel where builders feel confident pulling permits and launching the next wave of communities.

If you look at what’s been passed in the last couple of years—and where permits are actually being pulled—you can see the next chapters forming.

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The New “Soft Limits” On Growth

Instead of a single master cap, Phoenix is getting shaped by overlapping constraints:

• Water and groundwater policy
  State-level assured water supply rules and updated groundwater modeling have already slowed or paused some outer‑ring subdivisions that depended on local groundwater, especially in parts of the West Valley.
  That doesn’t halt growth metro‑wide—it just makes groundwater‑only expansion less viable and pushes builders toward corridors with diversified supplies and municipal providers.
• Utility and infrastructure capacity
  Cities are tying new approvals more closely to existing or fundable infrastructure—roads, water, sewer, power—so projects without a clear infrastructure path get delayed or re‑scaled.
• Housing‑policy pushes for infill and gentle density
  New state laws (like 2024’s middle‑housing and ADU bills) require big cities to make room for more units inside existing footprints, not just out on the desert edge.​

Together, these policies act less like a brick wall and more like a funnel—tilting future growth toward specific locations and formats.

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Key Planning Policies Steering Where Growth Goes

Three big policy currents are reshaping builder strategy:

1. Middle Housing and Missing-Middle Requirements

Arizona’s “middle housing” law (HB 2721) forces cities over 75,000 people to allow duplexes, triplexes, fourplexes, and other small-scale multifamily on lots that were strictly single‑family, especially within a mile of central business districts.​

That means:

• More by‑right opportunities for small, infill multifamily in and around central Phoenix.
• Less dependence on traditional big‑lot subdivisions to create supply.

Builders who specialize in townhomes, small multifamily, and build‑for‑rent product are already tracking these overlays and zoning changes for their next moves.

2. ADUs and Reuse of Existing Land

The ADU law (HB 2720) requires larger cities to allow at least one accessory dwelling unit per single‑family lot and limits how cities can block them with setbacks, parking demands, or design hurdles.​

That opens up:

• A slow but steady trickle of new, small units in established neighborhoods.
• More opportunities for small‑scale investors, multigenerational households, and “invisible density” near job cores.

It doesn’t replace large master‑planned communities, but it changes where incremental supply can appear—and which lots are suddenly more valuable.

3. Commercial-to-Residential Conversion

New law also lets developers convert certain obsolete commercial and office buildings to housing without going through full rezoning in larger cities.​

Starting in 2025:

• Cities over 150,000 population must allow up to a portion of existing commercial structures to be demolished or converted to residential if they’re considered obsolete.​
• This creates a pipeline of potential urban infill housing in places where land assembly and zoning used to be major barriers.

That’s another strong pull toward inward expansion rather than pure sprawl.

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The Reality Check: Permits and Affordability

Even with these policies, builders are dealing with:

• Higher construction and financing costs.
• Longer approval times in some corridors.
• Buyers squeezed by rates and affordability.

Permitting data show:

• Arizona housing permits have dropped from their 2021 peak; Maricopa County is on track for roughly 33,000 new units in 2024, about 3,000 fewer than 2023.​
• Forecasts suggest statewide permits dipping again into 2025 before stabilizing, with Phoenix MSA single‑family and multifamily permits both off their highs.​

So a key part of “where builders go next” is not just policy—it’s where deals still pencil under today’s cost and rate structure.

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Where Builders Are Most Likely To Expand Next

Putting this all together, the next wave of builder focus tends to cluster in a few types of locations:

1. Infrastructure-Ready Corridors

Submarkets that already have:

• Freeway access (Loop 202, 303, I‑10 spines).
• Existing or clearly funded water/sewer capacity.
• Power plans that balance industrial, data centers, and residential.

These corridors let builders move faster with less entitlement and utility risk, even if land isn’t the cheapest on the map.

2. Infill and Reuse Zones That Just Got Easier

Areas near central Phoenix and other job cores where:

• Middle‑housing rules and ADU laws create new by‑right paths for small multifamily and accessory units.​
• Older commercial or office properties can be converted to residential without full rezoning.​

Expect more townhome, small multiplex, build‑for‑rent, and adaptive‑reuse projects here—especially from builders who can work on tighter, more complex sites.

3. Master-Planned Communities With Water and Entitlements Locked In

Even with groundwater pressure and infrastructure costs, master‑planned communities remain attractive when:

• Water supply is secured (either through a designated provider or a locked‑in assured supply).
• Impact fees and infrastructure plans are known quantities, not moving targets.
• Cities see them as key pieces of long‑term housing plans.

Those communities often become “safe harbors” for production builders, even if they’re farther from the core, because the policy and utility stories are clear.

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How This Should Shape Your Lens as a Buyer or Investor

For someone choosing where to buy or place capital, this environment rewards paying attention to policy and planning, not just pricing:

• In corridors with clear infrastructure and water stories, growth is more likely to be continuous and predictable.
• In infill and inner‑ring areas, new state laws open more doors for incremental density and reuse, which can support land and home values over time.
• In fringe zones still waiting on water, sewer, or power clarity, glossy plats may move slower than the marketing suggests.

Instead of asking only “Is this area growing?”, it’s useful to ask:

• “Is this area planned to grow under the new rules?”
• “Are utilities and zoning working with that plan or fighting it?”
• “Does this community live in one of the corridors that policy is favoring next?”

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A Warm Closing From Renee

If you’re looking at Phoenix and trying to decide which side of the Valley, which corridor, or which product type makes sense for the next decade—not just the next year—you’re asking the right questions. Growth here is no longer just about open land; it’s about where policy and infrastructure are quietly rolling out the red carpet.

You don’t have to piece that together by yourself. This is exactly the level I love to walk clients through: how new laws, growth limits, and infrastructure plans are changing where builders are really leaning in next.

If you’re thinking about making a move in Phoenix, you don’t have to figure it out alone. Reach out anytime, and we’ll map out the corridors and communities that best align with both your life and where this market is truly headed.

Get the full Phoenix Market Insights → [Market Insights]