What Is the Due Diligence Period in Arizona Real Estate? A Phoenix Buyer's Guide

The Terrain: How Arizona's Due Diligence Period Is Structured

The Arizona Residential Resale Real Estate Purchase Contract governs the mechanics of the due diligence period for the vast majority of resale transactions in Phoenix, Peoria, Goodyear, Surprise, and Buckeye. Under Section 6a of the contract, the buyer's inspection period is 10 days after contract acceptance unless the parties negotiate otherwise. The Arizona Association of REALTORS updated the Residential Resale Purchase Contract as recently as February 2026 -- these are the active documents governing transactions today.

The 10-day default is negotiable. In the current West Valley market -- where Cromford Market Index readings show supply outpacing demand across Buckeye, Goodyear, and Surprise -- buyers have more room to negotiate standard or extended inspection periods. The length should be treated as a material contract term, not a formality.

Arizona's overall transaction timeline from accepted offer to close of escrow typically runs 25-35 days. The 10-day due diligence window is the single most information-dense phase of that timeline. Everything a buyer needs to know about property condition, seller disclosures, HOA financial health, title exceptions, and insurance eligibility must be surfaced within that period.

The Weather: What Phoenix Buyers Get Wrong About This Period

The most common misunderstanding is treating the due diligence period as an automatic "free look" -- a consequence-free window to change your mind. That framing is technically partially correct and practically dangerous.

It is true that in Arizona, a buyer can cancel at any point before midnight on Day 10 and receive a full earnest money refund -- no reason required. What buyers frequently miss is how that protection erodes after Day 10.

What the Arizona Due Diligence Period Actually Covers

The SPDS: What Sellers Are Required to Disclose

The seller must deliver the SPDS within 5 days of contract acceptance. It covers past water leaks, roof repairs, HOA assessments, appliance conditions, insurance claim history, and more. A seller who knows the HVAC is 18 years old, the roof had a repair in 2019, and the HOA has a pending special assessment is required to disclose those facts. Read it carefully -- the SPDS provides information the home inspection cannot.

Physical Inspections: What to Commission in Phoenix

Standard home inspection cost in the Phoenix Metro: $350-$500 depending on square footage. Add-ons worth commissioning:

• WDIIR (termite inspection): Required for VA and FHA loans. Recommended for all purchases in Arizona.
• Pool and spa inspection: Not included in standard home inspection. Budget $150-$250 separately.
• Sewer scope: $150-$300. Critical for older homes or any property with mature tree canopy near the foundation.
• Roof walk: Confirm your inspector physically walks the roof. Not all inspectors do this by default.

HOA Investigation: What the Home Inspector Won't Find

For properties in HOA communities -- most new and semi-new construction across Peoria, Goodyear, Surprise, and Anthem -- the due diligence period is also the time to review the HOA's financial documents, CC&Rs, and reserve fund status. An HOA with depleted reserves or a pending special assessment is a material financial condition. It does not appear on the home inspection report. Buyers who skip this review have discovered assessment obligations of $5,000-$15,000 post-close.

The BINSR: Three Choices, One Shot

The Buyer's Inspection Notice and Seller's Response (BINSR) is the formal mechanism for translating inspection findings into negotiation. Buyers have exactly three options:

If Option 3 is selected, the seller can agree to all repairs, some repairs, offer a credit or price reduction, or decline entirely. If the seller declines, the buyer has 5 days to cancel (full earnest money refund) or proceed as-is. If the buyer does not cancel within that 5-day window, they are obligated to close without correction of those items.

The BINSR works best when focused on items with documented cost implications -- not every deferred maintenance item in the report. A targeted BINSR grounded in contractor cost data lands differently with a seller than a blanket punch list. In the current West Valley market, a specific, cost-supported credit request gives the seller a clear path to say yes.

What Happens After the Due Diligence Period Closes

After Day 10, the buyer's unconditional cancellation right is gone. Remaining exit options are the appraisal contingency (property doesn't appraise at or above purchase price) and the financing contingency (buyer unable to obtain loan approval despite good-faith effort). Neither can be used simply because a buyer changed their mind.

The final walk-through, typically conducted 1-3 days before close, confirms the property is in substantially the same condition as at contract execution and that agreed repairs are complete. It is not a second due diligence period.

How to Use the Due Diligence Period Strategically in the West Valley

In the current Phoenix Metro market -- buyer-favorable CMI readings across much of the West Valley, inventory elevated, days on market lengthened to 60-80+ days in submarkets like Buckeye and Goodyear -- buyers have meaningful negotiation leverage inside the BINSR process. Sellers who have been sitting on market are motivated to resolve inspection issues rather than return to market at a lower price.

Use the full 10 days. Book the inspection on Day 1. Run the SPDS review, HOA documents, and title commitment simultaneously. Hold the BINSR submission for Days 7-9 after all investigation threads are complete. A BINSR submitted on Day 9 with a specific, cost-supported repair request reflects a buyer who did the work -- and that positioning consistently produces better seller responses than a rushed Day 3 submission.

If the inspection surfaces something significant -- active termite infestation, a failing HVAC, foundation concerns -- the due diligence period is the leverage window. Used correctly, it either produces a seller credit that changes the economics of the transaction, or it produces a clean cancellation with earnest money intact.

Also see: What Do Home Inspectors Look for in Phoenix During an Inspection? -- a system-by-system breakdown of what the physical inspection should cover in the Phoenix Metro.