How to Create a Property Acquisition Due Diligence Timeline

The Problem: Due Diligence Periods Are Fixed; Investigations Are Not

A property acquisition purchase and sale agreement gives you a defined due diligence period—typically 30 to 90 days—during which you can walk away from the deal and recover your deposit. That period starts the moment the PSA is executed. If you don't have your investigations organized from day one, you'll hit the end of your feasibility window with open questions: an environmental report still being finalized, a title curative issue not yet resolved, a property condition assessment that just arrived but hasn't been reviewed.

The cost of an unmanaged due diligence process is either losing a good deal (walking away because you couldn't complete your review in time) or closing on a bad one (letting your deposit go hard before discovering a material defect). Both outcomes are expensive. Buyers who get burned by due diligence almost always had the same root cause: they treated the period as open-ended rather than running a parallel set of investigations on a tight clock.

A property acquisition due diligence timeline in gantt-chart.io maps every investigation workstream against your PSA deadline so you know exactly which reviews are on the critical path and which have slack.

---

Prerequisites

Before building your due diligence timeline:

• PSA execution date: The clock starts here
• Due diligence period end date: The date by which you must terminate or proceed (often with a deposit going hard)
• Property type: Office, retail, industrial, multifamily, land—determines which investigations are relevant
• Property size: Square footage, acreage, number of units
• Seller's data room: What has already been provided vs. what needs to be requested
• Third-party vendor engagement: Which consultants are under contract (environmental, PCA, survey, appraisal)
• Lender requirements: If financing, lender will have their own due diligence checklist and appraisal order
• Legal counsel: Attorney assigned to title review and contract issues

---

Step-by-Step Instructions

Step 1: Set Up the Due Diligence Timeline

1. Open gantt-chart.io
2. Title it "[Property Address] Acquisition — Due Diligence — Close [Date]"
3. Set the view to cover the full PSA period from execution through closing: typically 60-120 days
4. Use Week view—due diligence moves quickly and week-level granularity matters
5. Add Due Diligence Period Expires as the hard red milestone. Add Deposit Goes Hard and Closing as orange milestones.

Step 2: Document Review and Data Room

1. Create a task group: Document Review
2. Add:

• Data room access confirmed — Day 1; request from seller's broker immediately
• Rent roll review — 3-5 days; verify unit counts, lease terms, rent levels
• Lease abstract review — 1-2 weeks; each lease needs to be read for options, co-tenancy, exclusives
• Operating statements review (3-year history) — 3-5 days
• CAM reconciliation review — 3-5 days (commercial properties)
• Service contracts review — 2-3 days; identify assumable vs. terminable contracts
• Permits and certificates of occupancy review — 2-3 days
• Litigation and warranty review — 2-3 days
• Document review complete — milestone

Step 3: Physical Due Diligence

1. Create a task group: Physical Investigations
2. Add:

• Property condition assessment (PCA) engagement — Day 1; most firms need 2-3 weeks to schedule and complete
• PCA site visit — 1 day; schedule in first week
• PCA report delivery — 2-3 weeks after site visit
• Roof inspection (if not covered adequately by PCA) — 1-2 weeks
• MEP systems inspection — 1-2 weeks; critical for older buildings
• Structural inspection — 1-2 weeks if flagged by PCA
• Physical due diligence complete — milestone

Step 4: Environmental Due Diligence

1. Create a task group: Environmental
2. Add:

• Phase I Environmental Site Assessment engagement — Day 1; takes 3-4 weeks
• Phase I site visit — 1 day; in first week
• Phase I report delivery — 3-4 weeks
• Phase II engagement (if Phase I identifies RECs) — add 6-12 weeks; may require PSA extension
• Environmental review complete — milestone

1. If Phase I identifies Recognized Environmental Conditions (RECs), immediately notify seller and lender; PSA extension may be necessary.

Step 5: Legal and Title Review

1. Create a task group: Legal & Title
2. Add:

• Title commitment ordered — Day 1
• ALTA survey ordered — Day 1; takes 2-4 weeks
• Title commitment received — 1-2 weeks
• Survey received — 2-4 weeks
• Title exceptions review — 3-5 days after receipt
• Title curative issues identified — milestone; raise with seller immediately
• Title curative work complete — 2-6 weeks depending on issues
• Zoning confirmation / zoning report — 2-3 weeks
• Legal review complete — milestone

Step 6: Financial Analysis and Financing

1. Create a task group: Financial & Financing
2. Add:

• Pro forma underwriting — 1 week; update as document review data comes in
• Lender engagement — Day 1 if acquisition financing required
• Appraisal ordered — 1-2 weeks after lender engagement; takes 3-5 weeks to complete
• Loan term sheet — 2-3 weeks
• Loan commitment — 3-6 weeks after term sheet
• Final investment committee approval — milestone; must happen before deposit goes hard
• Closing preparation — 2 weeks

---

Key Milestones

| Milestone | Typical Timing |

|-----------|----------------|

| PSA executed; due diligence clock starts | Day 0 |

| Data room accessed; third parties engaged | Day 1-3 |

| PCA and Phase I site visits complete | Week 1-2 |

| Title commitment received | Week 1-2 |

| PCA report received | Week 3-4 |

| Phase I report received | Week 3-4 |

| Document review complete | Week 2-4 |

| Investment committee approval | Week 4-8 |

| Deposit goes hard | Per PSA |

| Due diligence period expires | Per PSA |

| Closing | Per PSA |

---

Common Mistakes

• Not engaging third-party vendors on Day 1: Environmental firms and PCA consultants are often booked 1-2 weeks out. If you wait until Week 2 to engage, you won't have reports before your due diligence period expires.
• Reviewing documents sequentially instead of in parallel: Title review, environmental, physical, and financial review should all run simultaneously. Running them serially will eat your entire due diligence period.
• Waiting for all reports before making the go/no-go decision: Make a preliminary go/no-go at the midpoint of your due diligence period based on available information. Use the second half to confirm, not to start.
• Not tracking title curative milestones: Title issues (easements, encroachments, old liens) require the seller to take corrective action. These take time and must be tracked explicitly.
• Forgetting the lender's due diligence timeline: If you're getting a loan, the lender has their own checklist that runs parallel to yours. Their appraisal, environmental review, and loan commitment all have timelines that must fit within your closing deadline.

---

Template

gantt-chart.io includes a property acquisition due diligence template with all investigation workstreams mapped against a standard 60-day PSA period. Open it, adjust to your specific PSA dates, and share with your acquisition team, legal counsel, and lender.