Why Due Diligence Determines Whether a Project Is Viable

Development projects that run into trouble — cost overruns, stalled permits, contaminated soil, title disputes — often share a common root cause: insufficient investigation before construction began. Due diligence is the structured process developers use to verify that a site is legally, physically, and financially suited to what they intend to build.

As property development involves coordinating dozens of moving parts, the due diligence phase is where developers ask hard questions while there is still time to walk away or renegotiate. It typically follows initial site selection and precedes any binding commitment to purchase or develop.

The checklist below reflects the core categories experienced developers work through. Individual projects may require additional specialist reviews — particularly for brownfield redevelopment, historic properties, or large mixed-use schemes. Consult qualified legal, environmental, and financial professionals before making decisions specific to your project.

Zoning and Land Use

Confirm the site's current zoning classification and verify it permits the intended use. Must
Identify whether a rezoning, variance, or conditional use permit will be required before construction. Must
Review any overlay districts, historic designations, or flood zone classifications that restrict development. Must
Check local comprehensive or general plans to assess whether the site's intended use aligns with long-term municipal planning. Should

Title and Legal Status

Commission a full title search to identify liens, encumbrances, deed restrictions, or clouds on title. Must
Identify all easements crossing the property — utility, access, drainage — and confirm they do not conflict with the intended footprint. Must
Verify ownership chain and confirm the seller has clear legal authority to transfer the property. Must
Review any existing leases, licenses, or occupancy agreements that may survive a sale. Should

Environmental and Geotechnical

Conduct a Phase I Environmental Site Assessment to identify recognized environmental conditions from past land use. Must
Order a Phase II assessment with soil and groundwater sampling if the Phase I flags any potential contamination. Must
Commission a geotechnical investigation to assess soil bearing capacity, groundwater depth, and site stability. Must
Review FEMA flood maps and determine whether the site falls within a Special Flood Hazard Area. Should
Identify any wetlands, protected habitats, or regulated waterways on or adjacent to the parcel. Should

Utilities and Infrastructure

Confirm the availability and capacity of water, sewer, gas, and electrical service to the site. Must
Determine whether utility extensions or upgrades will be required and obtain preliminary cost estimates. Should
Assess road access conditions, traffic study requirements, and any required off-site improvements. Should

Financial Feasibility

Prepare a project pro forma that models acquisition costs, hard and soft construction costs, carry costs, and projected revenue or end value. Must
Identify applicable impact fees, connection fees, and development exactions imposed by the municipality. Must
Confirm financing conditions and verify that projected returns satisfy lender requirements and equity thresholds. Must
Stress-test the pro forma against conservative market assumptions to assess downside exposure. Should
Review comparable sales and rental data to validate market demand assumptions underlying the project concept. Should

Tools and Professionals Typically Involved

Due diligence is rarely a solo undertaking. Developers typically assemble a team of specialists whose findings feed into a single feasibility picture. Each stage of a development project depends on the quality of investigation that came before it — which is why the professionals engaged during due diligence matter as much as the checklist itself.

Required

Licensed Real Estate Attorney

Reviews title documents, easements, deed restrictions, and purchase contract terms to protect the developer's legal interests.

Required

Environmental Consultant

Conducts Phase I and Phase II environmental site assessments to identify contamination risks and regulatory obligations.

Required

Geotechnical Engineer

Analyses soil conditions, bearing capacity, and groundwater levels to determine whether the site can structurally support the planned construction.

Required

Land Use Planner or Zoning Attorney

Interprets zoning codes, overlay districts, and entitlement pathways and advises on permit strategies.

Required

Licensed Surveyor

Produces an accurate boundary survey and identifies encroachments, easement locations, and topographic features.

Optional

Financial Analyst or Development Consultant

Builds the project pro forma, models financing scenarios, and stress-tests assumptions against market data.

Skipping Steps Compounds Risk

Due diligence phases are interdependent — an environmental finding can alter the financial model, which may affect the legal structure of the deal. Cutting short any single area of investigation does not just create a gap in that category; it can distort conclusions drawn across the entire feasibility analysis. Developers who have been through troubled projects often cite skipped or abbreviated due diligence as a primary contributing factor.

For sites that present environmental uncertainty, developers often compare greenfield versus brownfield trade-offs carefully before committing, since remediation costs on previously used land can significantly alter project economics.

Due Diligence Is Not a Guarantee

Even a thorough due diligence process cannot eliminate all project risk. Market conditions, regulatory decisions, and unforeseen site conditions can change after investigation concludes. The purpose of due diligence is to surface known and knowable risks so that developers can make informed decisions — not to produce certainty. Always engage qualified legal, environmental, and financial professionals whose findings are specific to your site and project.